Keywords
Sludge, Hydrolyzed Protein Solution, Edible Fungi Growth
Abstract
The sludge (food factory sludge) is hydrolyzed by acid and alkali to prepare hydrolyzed protein liquid (peptides and amino acid complexes, which are microbial proteins), and combined with soybean meal (vegetable protein), slaughterhouse animal feathers (animal protein) hydrolyzed protein liquid, As well as conventional edible fungus nitrogen source bran and rice sugar factory rice residue as nitrogen sources or nutritional additives for Pleurotus ostreatus cultivation, the effects on mycelium growth, yield and bioconversion rate of Pleurotus ostreatus were tested. The results showed that several hydrolyzed protein solutions had a significant impact on the mycelial growth, yield, and bioconversion rate of Pleurotus ostreatus. The sludge hydrolyzed protein solution had the best effect on mycelial growth, and the other two hydrolyzed protein solutions also had a promoting effect. The maximum output of adding sludge hydrolyzed protein liquid can reach 806g/bag, adding soybean meal hydrolyzed protein liquid, the maximum yield is 532g/bag, adding animal feather hydrolyzed protein liquid from slaughterhouse, the maximum yield is 525g/bag; the control is 480g/bag ( Regular cottonseed hulls). The biotransformation rates were 161.2%, 106.4% and 105.0% respectively, while the control biotransformation rate was 96%; the yield increase rates were 67.92%, 10.83% and 9.38% respectively. Therefore, sludge, soybean meal, and animal feather protein hydrolyzate from slaughterhouses can increase the yield of oyster mushrooms. This research also established a foundation for the utilization of sludge resources.
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Original research done by Ni Hong, Li Yibo, Chen Ting, Guo Ran, Li Yadong
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