Industrialization of the use of mealworm and black soldier fly in urban waste management utilizing probiotics.

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Nasrin Taghikhani, Amirreza Shaebani Darejazi, Mahsa Abedi, Ghazaleh Maghsoudi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3417522/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Today, protein, which is less common, may be a better substitute for traditional livestock (beef) and poultry. The larvae of the scientific name yellow mealworm ( Tenebrio molitor ) and black soldier fly ( Stratiomyidae ) are described as a small roundabout short hairstreak that are a rich source of protein. The damp waste serves as a bed for insects. The black soldier fly (BSF) is a species of insect that feeds on discarded materials and has an extremely high rate of growth and reproduction. Using insects to feed livestock and fish can be a viable alternative to soy. The most important challenges in using beneficial insects on an industrial scale include the rate of decomposition, the survival rate, the amount of protein and the toxicity of the product produced, which is of great concern. Recently there have been studies on the effect of probiotics on the growth of beneficial insects. Although studies show the effectiveness of probiotics, there are still obstacles to industrialization. Therefore, in this research, the effect of fermentation of wastewater by a combination of several Lactobacillus strains (VSL#3) on the decomposition rate, the percentage survival of the protein content and the toxicity of the product were examined. The results showed that compared to feed waste without probiotics, the protein content of the insects increased. This research also shows that the use of combination of probiotics in waste digestion has great potential to accelerate the transition from a linear economy to a circular economy. beneficial insects less conventional protein probiotics Figures Figure 1 Figure 2 1. Introduction Insects are a group of arthropods and there are millions of species of insects in nature. Two insect species with the highest economic potential and residue-processing ability are the yellow mealworm ( Tenebrio molitor ) and the black soldier fly ( Hermetia illucens ). The yellow mealworm (YM) is the larva of a species of beetle called the dark beetle. After oviposition, this dark beetle, like all holometabolous insects, goes through four life stages: egg, larva, pupa, and adult. Larvae are typically 2.5 cm or more in length, while adult larvae are typically between 1.25 and 1.8 cm in length. The eggs grow in a completely clean environment on the wheat bran bed and are released at a specific time and grow depending on farm type and environmental factors in the breeding farm. The eggs develop until they reach the larval stage. The larvae now become pupae. The YM pupa does not feed on the food of the YM larvae and the pine beetle, which means that the YM larva does not eat at all. At the end of pupation, the pupae turn into cockroaches. After birth, the cockroaches change colour and become black. At this time, they begin to mate and lay eggs, the egg hatches and the larva comes out, and this cycle is constantly repeated in the cockroach breeding farm [1, 2 ]. An important part of the food chain, their high protein content supports the growth of birds and provides other important nutrients that fish need in their diet. They are also consumed by many athletes and bodybuilders due to their high protein content. BSF and YM are bred in special containers containing wheat bran, barley and other nutrients and minerals such as the peel of various fruits and vegetables with high nutritional value. In addition to bird and fish food, YMs are also used as food for reptiles such as lizards, turtles, amphibians, rodents, ornamental and breeding birds, farmed and aquarium fish and small mammals [2, 3]. It is predicted that global food production will need to increase by 70% by 2050 to feed the growing world population. As a result, there has been a greater focus on higher quality diets in developing countries and more emphasis on the sustainability of global animal feed supply chains. Animal feed is said to be responsible for around 7% of all greenhouse gas emissions, and this figure is likely to increase as more agricultural land is used to grow forage crops [4]. Poultry feed is also in search of stable and high-quality feed alternatives for two main reasons. Soybeans are the main protein in poultry feed. This product is closely linked to deforestation and there is a lot of pressure from consumers and supermarkets to avoid soy. A concrete example: Some companies have already removed soy from their milk supply chain in recent years for similar reasons [3]. Wet waste is organic, biological or perishable waste that can be decomposed by microorganisms in the air or in the soil. This includes food waste from households, institutions and industries such as food waste, fruit and vegetable peelings, burnt and rotted cooking oils, tea waste and garden and green space waste. Food wastes such as rice and bread scraps, dairy products and meat, fruit peel and oilseeds, egg shells and vegetable scraps are classified under Other Waste. At the same time, a third of all food produced worldwide is wasted. This means that 500 billion in value is lost every year, resulting in the release of 3.3 billion tons of carbon into the environment. Therefore, a fundamental rethinking of the food waste cycle and ways to make better use of food waste is needed. The problem extends across all parts of the supply chain, from the pre-farm stage to food processors, retailers and even household food waste [4]. Probiotic bacteria are microorganisms that are useful for optimal food digestion. A group of these bacteria, called probiotic bacteria, not only aid in digestion but also produce complex molecules and compounds such as vitamins and various antibiotics that are useful to consumers. The Food and Agriculture Organization of the United Nations (FAD) and the World Health Organization (WHO) define probiotics as: (live microorganisms which, when administered in sufficient amounts, are beneficial to the host). Probiotics can help us solve this challenge and could be used in place of commercial enzymes. Additionally, supplementing with probiotics is an attractive benefit due to their antioxidant and antimicrobial effects, as well as improving nutrient digestion [5, 6, 7]. VSL#3 consisting of the following 8 strains of Streptococcus thermophilus (BT01), Bifidobacterium breve (BB02), Bifidobacterium longum (BL03), Bifidobacterium infantis (BI04), Lactobacillus acidophilus (BA05), Lactobacillus plantarum (BP06), Lactobacillus paracasei (BP07), and Lactobacillus delbrueckii subsp . Bulgaricus (BD08), which are in the active form 1010–1011 CFU/cm3 [8]. There are many researches about impacts of probiotics fermentation on breeding of useful insects. Despite positive impacts of probiotics on the rate of decomposition, the survival rate, the amount of protein and the toxicity of the product produced, scale-up of this process is still a challenge. It is hoped that mixture of probiotics could improve scale-up. 2. Material and methods 2.1. Materials: For this study, YM and BSF were purchased from the Insect Breeding Center. Lactobacillus casei strain NZ98 and VSL#3 were also purchased from a commercial source for use in waste treatment. Nutrients for useful insects were obtained from the waste of local fruit and vegetables. The equipment used consists of a 5 litters agitator tank for waste fermentation and boxes for keeping and breeding insects (a 12*40*60 cm3 box for YMs and a 14*40*60 cm3 box for BSF) and a used industrial meat grinder on farm to breed beneficial insects. 2.2. Methods: The method used by Chang was carried out with some modifications [9]. After grinding with an industrial meat grinder, the fresh residue of the day was placed in a tank with a continuous stirrer and, after adding 2% of the bacterial strain Lactobacillus casei or VSL#3, stirred for 12 hours at ambient temperature without changing the pH (5.5). To keep the experiment consistent, a sample without the addition of a probiotic strain was stirred in another tank for 12 hours. After processing the waste, each sample was placed in storage boxes containing 1 kg each of YM and BSF. The rearing temperature was 25°C and rearing was carried out in the dark. The biodegradation of industrial waste was measured by measuring the residual weight of the waste every 4 hours for 36 hours. To measure insect protein, we used the Kjeldahl method [10, 11, 12]. To measure toxicity, we used kits to test for Salmonella and Escherichia coli [13]. 3. Results 3.1. The amount of protein: The amount of insect protein when adding probiotics to the tank and control is shown in Fig. 1 . Observations have shown that Lactobacillus casei has an impact on the protein content of YMs and BSF larvae (a 4% increase reported in YMs) despite the addition of probiotics. and 5% in BSF larvae) the effect of VSL#3 is greater. The protein content is given as 63% and 48% for YM and BSF, respectively. Kim et al. (2020) reported that the crude protein content of Tenebrio molitor larvae is 52.4% on average [14]. Caligiani et al. (2021) worked on optimizing the protein content of BSF and reported that the protein content was in the range of 30–45% [15]. 3.2. Insect growth rate The growth rates of the insects were observed and are shown in Fig. 2 . The BSF has the highest and lowest growth rates. This trend indicates the greater effect of probiotic fermentation on BSF compared to YMs. The BSF in the waste sample without probiotics had a higher mortality rate than the growth rate, and the number of live YMs reached almost zero after 24 hours. At this number, the growth rate of the BSF with the probiotic-containing wastes of L. casei and VSL#3 is 1.75-fold and 2.5-fold after 10 hours. The reason for the decrease in the growth rate after 10 hours is the end of the backlog. The difference in the effect of residues on the YM has also been shown, but is less significant than that on the BSF. The influence of VSL#3 on BSF is significantly higher than in the control and the L. casei treatment, but this effect is not observed in YMs. The results are significantly higher than other reports related to BSF and YM. Schebeck et al. (2022) worked on optimizing the growth rate and survival of YM based on temperature and reported that the growth rate range was 42% [16]. Kim et al. (2021) reported that the survival rate of BSFs at 36 hours was 86% [17]. 3.3. Toxicity YM larvae in both groups were completely resistant to toxicity. This is despite the fact that positive Salmonella and E. coli were detected in BSF larvae processing unfermented waste. This result agrees with another reports. Auza et al. (2020) reported BSFs are not resistant to E. coli and Salmonella [18]. L. casei fermented waste containing probiotics resisted BSF to E. coli while is not still resistant to Salmonella . The results showed adding VSL#3 has a great effect on resistance of BSF to Salmonella . The results are summarized in Table 1. BSF YM Tests VSL#3 L. casei Control VSL#3 L. casei Control - + + - - - Salmonella - - + - - - E. coli 4. Conclusion The results showed that due to the direct effect of combination of probiotics on insect protein, with further studies and optimization of the conditions, the BSF can be mentioned together with the YM as a rich protein source in the future. The inability of the BSF to fully consume waste without fermentation and the increase in mortality compared to growth rate and toxicity observed in the BSF on a waste diet without probiotics and with L. casei probiotics demonstrate the importance of using combination of probiotics. The significant increase in the consumption rate of waste with VSL#3 probiotic processing compared to the control shows the importance of waste pre-processing, especially for large volumes. Declarations Conflict of interest We proclaim that we have no conflict of interest. References Refrences : Toviho, O. A., & Bársony, P. (2022). Nutrient Composition and Growth of Yellow Mealworm (Tenebrio molitor) at Different Ages and Stages of the Life Cycle. Agriculture, 12(11), 1924. Heussler, C. D., Insam, H., Walter, A., Steiner, B. S., Steiner, F. M., & Klammsteiner, T. (2022). Life-history traits of black soldier fly reared on agro-industrial by-products subjected to three pre-treatments: a pilot-scale study. Journal of Insects as Food and Feed, 1–12. Thrastardottir, R., Olafsdottir, H. T., & Thorarinsdottir, R. I. (2021). Yellow mealworm and black soldier fly larvae for feed and food production in europe, with emphasis on iceland. Foods, 10(11), 2744. Ojha, S., Bußler, S., & Schlüter, O. K. (2020). Food waste valorisation and circular economy concepts in insect production and processing. Waste Management, 118, 600–609. Richard, N., Rabot, R., Beutin, C., & van Loon, J. J. (2019). Live Yeast Probiotic Can Boost Growth Performances of Yellow Mealworm and Black Soldier Fly Larvae. Wageningen University: Wageningen, The Netherlands. Selaledi, L., Mbajiorgu, C. A., & Mabelebele, M. (2020). The use of yellow mealworm (T. molitor) as alternative source of protein in poultry diets: a review. Tropical Animal Health and Production, 52, 7–16. Thrastardottir, R., Olafsdottir, H. T., & Thorarinsdottir, R. I. (2021). Yellow mealworm and black soldier fly larvae for feed and food production in europe, with emphasis on iceland. Foods, 10(11), 2744. Ramedani, N., Sharifan, A., Gholam-Mostafaei, F. S., Rostami-Nejad, M., Yadegar, A., & Ehsani-Ardakani, M. J. (2020). The potentials of probiotics on gluten hydrolysis; a review study. Gastroenterology and Hepatology From bed to Bench, 13(Suppl1), S1. Hu Xinjun Zhang Guren. (2012). Method for processing food waste by using black soldier fly larvae and material formula. CN101889629B. Hayes, M. (2020). Measuring protein content in food: An overview of methods. Foods, 9(10), 1340. Darejazi, A. S., & Abedi, M. Optimize collagen extraction from yellow-fin tuna (Thunnus albacares) fish skin based on yield, collagen content, and color. Darejazi, A. S., Abedi, M., & Roostaazad, R. Optimize gelatin extraction from yellow-fin tuna (Thunnus albacares) fish skin based on yield, collagen content, and color. Wynants, E. (2019). Microbiological dynamics and safety risks during rearing of insects for food and feed. Hong, J., Han, T., & Kim, Y. Y. (2020). Mealworm (Tenebrio molitor Larvae) as an alternative protein source for monogastric animal: A review. Animals, 10(11), 2068. Fuso, A., Barbi, S., Macavei, L. I., Luparelli, A. V., Maistrello, L., Montorsi, M., ... & Caligiani, A. (2021). Effect of the rearing substrate on total protein and amino acid composition in black soldier fly. Foods, 10(8), 1773. Eberle, S., Schaden, L. M., Tintner, J., Stauffer, C., & Schebeck, M. (2022). Effect of temperature and photoperiod on development, survival, and growth rate of mealworms, Tenebrio molitor. Insects, 13(4), 321. Kim, C. H., Ryu, J., Lee, J., Ko, K., Lee, J. Y., Park, K. Y., & Chung, H. (2021). Use of black soldier fly larvae for food waste treatment and energy production in Asian countries: a review. Processes, 9(1), 161. Auza, F. A., Purwanti, S., Syamsu, J. A., & Natsir, A. (2020, April). Antibacterial activities of black soldier flies (Hermetia illucens. l) extract towards the growth of Salmonella typhimurium, E. coli and Pseudomonas aeruginosa. In IOP Conference Series: Earth and Environmental Science (Vol. 492, No. 1, p. 012024). IOP Publishing. 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Introduction","content":"\u003cp\u003eInsects are a group of arthropods and there are millions of species of insects in nature. Two insect species with the highest economic potential and residue-processing ability are the yellow mealworm (\u003cem\u003eTenebrio molitor\u003c/em\u003e) and the black soldier fly (\u003cem\u003eHermetia illucens\u003c/em\u003e). The yellow mealworm (YM) is the larva of a species of beetle called the dark beetle. After oviposition, this dark beetle, like all holometabolous insects, goes through four life stages: egg, larva, pupa, and adult. Larvae are typically 2.5 cm or more in length, while adult larvae are typically between 1.25 and 1.8 cm in length. The eggs grow in a completely clean environment on the wheat bran bed and are released at a specific time and grow depending on farm type and environmental factors in the breeding farm. The eggs develop until they reach the larval stage. The larvae now become pupae. The YM pupa does not feed on the food of the YM larvae and the pine beetle, which means that the YM larva does not eat at all. At the end of pupation, the pupae turn into cockroaches. After birth, the cockroaches change colour and become black. At this time, they begin to mate and lay eggs, the egg hatches and the larva comes out, and this cycle is constantly repeated in the cockroach breeding farm [1, 2 ].\u003c/p\u003e \u003cp\u003eAn important part of the food chain, their high protein content supports the growth of birds and provides other important nutrients that fish need in their diet. They are also consumed by many athletes and bodybuilders due to their high protein content. BSF and YM are bred in special containers containing wheat bran, barley and other nutrients and minerals such as the peel of various fruits and vegetables with high nutritional value. In addition to bird and fish food, YMs are also used as food for reptiles such as lizards, turtles, amphibians, rodents, ornamental and breeding birds, farmed and aquarium fish and small mammals [2, 3].\u003c/p\u003e \u003cp\u003eIt is predicted that global food production will need to increase by 70% by 2050 to feed the growing world population. As a result, there has been a greater focus on higher quality diets in developing countries and more emphasis on the sustainability of global animal feed supply chains. Animal feed is said to be responsible for around 7% of all greenhouse gas emissions, and this figure is likely to increase as more agricultural land is used to grow forage crops [4]. Poultry feed is also in search of stable and high-quality feed alternatives for two main reasons. Soybeans are the main protein in poultry feed. This product is closely linked to deforestation and there is a lot of pressure from consumers and supermarkets to avoid soy. A concrete example: Some companies have already removed soy from their milk supply chain in recent years for similar reasons [3].\u003c/p\u003e \u003cp\u003eWet waste is organic, biological or perishable waste that can be decomposed by microorganisms in the air or in the soil. This includes food waste from households, institutions and industries such as food waste, fruit and vegetable peelings, burnt and rotted cooking oils, tea waste and garden and green space waste. Food wastes such as rice and bread scraps, dairy products and meat, fruit peel and oilseeds, egg shells and vegetable scraps are classified under Other Waste. At the same time, a third of all food produced worldwide is wasted. This means that 500\u0026nbsp;billion in value is lost every year, resulting in the release of 3.3\u0026nbsp;billion tons of carbon into the environment. Therefore, a fundamental rethinking of the food waste cycle and ways to make better use of food waste is needed. The problem extends across all parts of the supply chain, from the pre-farm stage to food processors, retailers and even household food waste [4].\u003c/p\u003e \u003cp\u003eProbiotic bacteria are microorganisms that are useful for optimal food digestion. A group of these bacteria, called probiotic bacteria, not only aid in digestion but also produce complex molecules and compounds such as vitamins and various antibiotics that are useful to consumers. The Food and Agriculture Organization of the United Nations (FAD) and the World Health Organization (WHO) define probiotics as: (live microorganisms which, when administered in sufficient amounts, are beneficial to the host). Probiotics can help us solve this challenge and could be used in place of commercial enzymes. Additionally, supplementing with probiotics is an attractive benefit due to their antioxidant and antimicrobial effects, as well as improving nutrient digestion [5, 6, 7].\u003c/p\u003e \u003cp\u003eVSL#3 consisting of the following 8 strains of \u003cem\u003eStreptococcus thermophilus\u003c/em\u003e (BT01), \u003cem\u003eBifidobacterium breve\u003c/em\u003e (BB02), \u003cem\u003eBifidobacterium longum\u003c/em\u003e (BL03), \u003cem\u003eBifidobacterium infantis\u003c/em\u003e (BI04), \u003cem\u003eLactobacillus acidophilus\u003c/em\u003e (BA05), \u003cem\u003eLactobacillus plantarum\u003c/em\u003e (BP06), \u003cem\u003eLactobacillus paracasei\u003c/em\u003e (BP07), and \u003cem\u003eLactobacillus delbrueckii subsp\u003c/em\u003e. Bulgaricus (BD08), which are in the active form 1010\u0026ndash;1011 CFU/cm3 [8].\u003c/p\u003e \u003cp\u003eThere are many researches about impacts of probiotics fermentation on breeding of useful insects. Despite positive impacts of probiotics on the rate of decomposition, the survival rate, the amount of protein and the toxicity of the product produced, scale-up of this process is still a challenge. It is hoped that mixture of probiotics could improve scale-up.\u003c/p\u003e"},{"header":"2. Material and methods","content":"\u003cdiv id=\"Sec3\" class=\"Section2\"\u003e \u003ch2\u003e2.1. Materials:\u003c/h2\u003e \u003cp\u003eFor this study, YM and BSF were purchased from the Insect Breeding Center. \u003cem\u003eLactobacillus casei\u003c/em\u003e strain NZ98 and VSL#3 were also purchased from a commercial source for use in waste treatment. Nutrients for useful insects were obtained from the waste of local fruit and vegetables. The equipment used consists of a 5 litters agitator tank for waste fermentation and boxes for keeping and breeding insects (a 12*40*60 cm3 box for YMs and a 14*40*60 cm3 box for BSF) and a used industrial meat grinder on farm to breed beneficial insects.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec4\" class=\"Section2\"\u003e \u003ch2\u003e2.2. Methods:\u003c/h2\u003e \u003cp\u003eThe method used by Chang was carried out with some modifications [9].\u003c/p\u003e \u003cp\u003eAfter grinding with an industrial meat grinder, the fresh residue of the day was placed in a tank with a continuous stirrer and, after adding 2% of the bacterial strain \u003cem\u003eLactobacillus casei\u003c/em\u003e or VSL#3, stirred for 12 hours at ambient temperature without changing the pH (5.5). To keep the experiment consistent, a sample without the addition of a probiotic strain was stirred in another tank for 12 hours. After processing the waste, each sample was placed in storage boxes containing 1 kg each of YM and BSF. The rearing temperature was 25\u0026deg;C and rearing was carried out in the dark. The biodegradation of industrial waste was measured by measuring the residual weight of the waste every 4 hours for 36 hours. To measure insect protein, we used the Kjeldahl method [10, 11, 12]. To measure toxicity, we used kits to test for \u003cem\u003eSalmonella\u003c/em\u003e and \u003cem\u003eEscherichia coli\u003c/em\u003e [13].\u003c/p\u003e \u003c/div\u003e"},{"header":"3. Results","content":"\u003cdiv id=\"Sec6\" class=\"Section2\"\u003e \u003ch2\u003e3.1. The amount of protein:\u003c/h2\u003e \u003cp\u003eThe amount of insect protein when adding probiotics to the tank and control is shown in Fig.\u0026nbsp;\u003cspan refid=\"Fig1\" class=\"InternalRef\"\u003e1\u003c/span\u003e. Observations have shown that \u003cem\u003eLactobacillus casei\u003c/em\u003e has an impact on the protein content of YMs and BSF larvae (a 4% increase reported in YMs) despite the addition of probiotics. and 5% in BSF larvae) the effect of VSL#3 is greater. The protein content is given as 63% and 48% for YM and BSF, respectively. Kim et al. (2020) reported that the crude protein content of Tenebrio molitor larvae is 52.4% on average [14]. Caligiani et al. (2021) worked on optimizing the protein content of BSF and reported that the protein content was in the range of 30\u0026ndash;45% [15].\u003c/p\u003e \u003cp\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec7\" class=\"Section2\"\u003e \u003ch2\u003e3.2. Insect growth rate\u003c/h2\u003e \u003cp\u003eThe growth rates of the insects were observed and are shown in Fig.\u0026nbsp;\u003cspan refid=\"Fig2\" class=\"InternalRef\"\u003e2\u003c/span\u003e. The BSF has the highest and lowest growth rates. This trend indicates the greater effect of probiotic fermentation on BSF compared to YMs. The BSF in the waste sample without probiotics had a higher mortality rate than the growth rate, and the number of live YMs reached almost zero after 24 hours. At this number, the growth rate of the BSF with the probiotic-containing wastes of \u003cem\u003eL. casei\u003c/em\u003e and VSL#3 is 1.75-fold and 2.5-fold after 10 hours. The reason for the decrease in the growth rate after 10 hours is the end of the backlog. The difference in the effect of residues on the YM has also been shown, but is less significant than that on the BSF. The influence of VSL#3 on BSF is significantly higher than in the control and the \u003cem\u003eL. casei\u003c/em\u003e treatment, but this effect is not observed in YMs. The results are significantly higher than other reports related to BSF and YM. Schebeck et al. (2022) worked on optimizing the growth rate and survival of YM based on temperature and reported that the growth rate range was 42% [16]. Kim et al. (2021) reported that the survival rate of BSFs at 36 hours was 86% [17].\u003c/p\u003e \u003cp\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec8\" class=\"Section2\"\u003e \u003ch2\u003e3.3. Toxicity\u003c/h2\u003e \u003cp\u003eYM larvae in both groups were completely resistant to toxicity. This is despite the fact that positive \u003cem\u003eSalmonella\u003c/em\u003e and \u003cem\u003eE. coli\u003c/em\u003e were detected in BSF larvae processing unfermented waste. This result agrees with another reports. Auza et al. (2020) reported BSFs are not resistant to \u003cem\u003eE. coli\u003c/em\u003e and \u003cem\u003eSalmonella\u003c/em\u003e [18]. \u003cem\u003eL. casei\u003c/em\u003e fermented waste containing probiotics resisted BSF to \u003cem\u003eE. coli\u003c/em\u003e while is not still resistant to \u003cem\u003eSalmonella\u003c/em\u003e. The results showed adding VSL#3 has a great effect on resistance of BSF to \u003cem\u003eSalmonella\u003c/em\u003e. The results are summarized in Table\u0026nbsp;1.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"No\" id=\"Taba\" border=\"1\"\u003e \u003ccolgroup cols=\"7\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colspan=\"3\" nameend=\"c3\" namest=\"c1\"\u003e \u003cp\u003eBSF\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"3\" nameend=\"c6\" namest=\"c4\"\u003e \u003cp\u003eYM\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\" morerows=\"1\" rowspan=\"2\"\u003e \u003cp\u003eTests\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVSL#3\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003e\u003cem\u003eL. casei\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eControl\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eVSL#3\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cem\u003eL. casei\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c6\"\u003e \u003cp\u003eControl\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e\u003cb\u003e+\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e\u003cb\u003e+\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eSalmonella\u003c/em\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e\u003cb\u003e+\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u003cb\u003e-\u003c/b\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eE. coli\u003c/em\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e"},{"header":"4. Conclusion","content":"\u003cp\u003eThe results showed that due to the direct effect of combination of probiotics on insect protein, with further studies and optimization of the conditions, the BSF can be mentioned together with the YM as a rich protein source in the future.\u003c/p\u003e \u003cp\u003eThe inability of the BSF to fully consume waste without fermentation and the increase in mortality compared to growth rate and toxicity observed in the BSF on a waste diet without probiotics and with \u003cem\u003eL. casei\u003c/em\u003e probiotics demonstrate the importance of using combination of probiotics. The significant increase in the consumption rate of waste with VSL#3 probiotic processing compared to the control shows the importance of waste pre-processing, especially for large volumes.\u003c/p\u003e"},{"header":"Declarations","content":"\u003cp\u003e \u003ch2\u003eConflict of interest\u003c/h2\u003e \u003cp\u003eWe proclaim that we have no conflict of interest.\u003c/p\u003e \u003c/p\u003e"},{"header":"References","content":"\u003cp\u003e\u003cb\u003eRefrences\u003c/b\u003e:\u003c/p\u003e\u003cp\u003e\u003col\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eToviho, O. A., \u0026amp; B\u0026aacute;rsony, P. (2022). Nutrient Composition and Growth of Yellow Mealworm (Tenebrio molitor) at Different Ages and Stages of the Life Cycle. Agriculture, 12(11), 1924.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eHeussler, C. D., Insam, H., Walter, A., Steiner, B. S., Steiner, F. M., \u0026amp; Klammsteiner, T. (2022). Life-history traits of black soldier fly reared on agro-industrial by-products subjected to three pre-treatments: a pilot-scale study. Journal of Insects as Food and Feed, 1\u0026ndash;12.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eThrastardottir, R., Olafsdottir, H. T., \u0026amp; Thorarinsdottir, R. I. (2021). Yellow mealworm and black soldier fly larvae for feed and food production in europe, with emphasis on iceland. Foods, 10(11), 2744.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eOjha, S., Bu\u0026szlig;ler, S., \u0026amp; Schl\u0026uuml;ter, O. K. (2020). Food waste valorisation and circular economy concepts in insect production and processing. Waste Management, 118, 600\u0026ndash;609.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eRichard, N., Rabot, R., Beutin, C., \u0026amp; van Loon, J. J. (2019). Live Yeast Probiotic Can Boost Growth Performances of Yellow Mealworm and Black Soldier Fly Larvae. Wageningen University: Wageningen, The Netherlands.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eSelaledi, L., Mbajiorgu, C. A., \u0026amp; Mabelebele, M. (2020). The use of yellow mealworm (T. molitor) as alternative source of protein in poultry diets: a review. Tropical Animal Health and Production, 52, 7\u0026ndash;16.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eThrastardottir, R., Olafsdottir, H. T., \u0026amp; Thorarinsdottir, R. I. (2021). Yellow mealworm and black soldier fly larvae for feed and food production in europe, with emphasis on iceland. Foods, 10(11), 2744.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eRamedani, N., Sharifan, A., Gholam-Mostafaei, F. S., Rostami-Nejad, M., Yadegar, A., \u0026amp; Ehsani-Ardakani, M. J. (2020). The potentials of probiotics on gluten hydrolysis; a review study. Gastroenterology and Hepatology From bed to Bench, 13(Suppl1), S1.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eHu Xinjun Zhang Guren. (2012). Method for processing food waste by using black soldier fly larvae and material formula. CN101889629B.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eHayes, M. (2020). Measuring protein content in food: An overview of methods. Foods, 9(10), 1340.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eDarejazi, A. S., \u0026amp; Abedi, M. Optimize collagen extraction from yellow-fin tuna (Thunnus albacares) fish skin based on yield, collagen content, and color.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eDarejazi, A. S., Abedi, M., \u0026amp; Roostaazad, R. Optimize gelatin extraction from yellow-fin tuna (Thunnus albacares) fish skin based on yield, collagen content, and color.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eWynants, E. (2019). Microbiological dynamics and safety risks during rearing of insects for food and feed.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eHong, J., Han, T., \u0026amp; Kim, Y. Y. (2020). Mealworm (Tenebrio molitor Larvae) as an alternative protein source for monogastric animal: A review. Animals, 10(11), 2068.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eFuso, A., Barbi, S., Macavei, L. I., Luparelli, A. V., Maistrello, L., Montorsi, M., ... \u0026amp; Caligiani, A. (2021). Effect of the rearing substrate on total protein and amino acid composition in black soldier fly. Foods, 10(8), 1773.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eEberle, S., Schaden, L. M., Tintner, J., Stauffer, C., \u0026amp; Schebeck, M. (2022). Effect of temperature and photoperiod on development, survival, and growth rate of mealworms, Tenebrio molitor. Insects, 13(4), 321.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eKim, C. H., Ryu, J., Lee, J., Ko, K., Lee, J. Y., Park, K. Y., \u0026amp; Chung, H. (2021). Use of black soldier fly larvae for food waste treatment and energy production in Asian countries: a review. Processes, 9(1), 161.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003cspan\u003e \u003cli\u003e \u003cp\u003eAuza, F. A., Purwanti, S., Syamsu, J. A., \u0026amp; Natsir, A. (2020, April). Antibacterial activities of black soldier flies (Hermetia illucens. l) extract towards the growth of \u003cem\u003eSalmonella\u003c/em\u003e typhimurium, E. coli and Pseudomonas aeruginosa. In IOP Conference Series: Earth and Environmental Science (Vol. 492, No. 1, p. 012024). IOP Publishing.\u003c/p\u003e \u003c/li\u003e \u003c/span\u003e \u003c/ol\u003e\u003c/p\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"Brunel University London","isAcceptedByJournal":false,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"beneficial insects, less conventional protein, probiotics","lastPublishedDoi":"10.21203/rs.3.rs-3417522/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3417522/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eToday, protein, which is less common, may be a better substitute for traditional livestock (beef) and poultry. The larvae of the scientific name yellow mealworm (\u003cem\u003eTenebrio molitor\u003c/em\u003e) and black soldier fly (\u003cem\u003eStratiomyidae\u003c/em\u003e) are described as a small roundabout short hairstreak that are a rich source of protein.\u003c/p\u003e \u003cp\u003eThe damp waste serves as a bed for insects. The black soldier fly (BSF) is a species of insect that feeds on discarded materials and has an extremely high rate of growth and reproduction. Using insects to feed livestock and fish can be a viable alternative to soy. The most important challenges in using beneficial insects on an industrial scale include the rate of decomposition, the survival rate, the amount of protein and the toxicity of the product produced, which is of great concern. Recently there have been studies on the effect of probiotics on the growth of beneficial insects. Although studies show the effectiveness of probiotics, there are still obstacles to industrialization. Therefore, in this research, the effect of fermentation of wastewater by a combination of several \u003cem\u003eLactobacillus\u003c/em\u003e strains (VSL#3) on the decomposition rate, the percentage survival of the protein content and the toxicity of the product were examined.\u003c/p\u003e \u003cp\u003eThe results showed that compared to feed waste without probiotics, the protein content of the insects increased. This research also shows that the use of combination of probiotics in waste digestion has great potential to accelerate the transition from a linear economy to a circular economy.\u003c/p\u003e","manuscriptTitle":"Industrialization of the use of mealworm and black soldier fly in urban waste management utilizing probiotics.","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2023-10-09 21:59:05","doi":"10.21203/rs.3.rs-3417522/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"19f9af0a-d315-4b0a-a70c-dbbaf7402441","owner":[],"postedDate":"October 9th, 2023","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2023-10-09T21:59:06+00:00","versionOfRecord":[],"versionCreatedAt":"2023-10-09 21:59:05","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-3417522","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3417522","identity":"rs-3417522","version":["v1"]},"buildId":"pf3fE39SIOqb-0xH_OWvX","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}