Exploring sustainable mushroom cultivation using hydrolyzed proteins from waste, enhancing yield and promoting agricultural sustainability through innovative nitrogen source recycling.

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 806 g/bag, adding soybean meal hydrolyzed protein liquid, the maximum output can be 532 g/bag, adding animal feather water from slaughterhouse

Abstract:

The recent study focuses on utilizing various hydrolyzed protein solutions derived from food factory sludge, soybean meal, and animal feathers, along with conventional nitrogen sources like bran and rice residues from sugar factories, to enhance the cultivation of Pleurotus ostreatus (oyster mushrooms). This innovative approach not only aims to improve the mycelium growth, yield, and bioconversion rate of Pleurotus ostreatus but also contributes to the sustainability of agricultural practices by recycling waste products into valuable agricultural inputs.

Introduction:

Pleurotus ostreatus, commonly known as oyster mushrooms, are a popular edible fungus, valued for their nutritional content and culinary versatility. Traditional cultivation methods rely on organic waste materials as substrates, which although effective, offer room for improvement in terms of yield and environmental sustainability. This study introduces a novel substrate enrichment strategy by incorporating hydrolyzed protein solutions derived from various sources, including industrial sludge, vegetable proteins, and animal proteins, to enhance the growth and yield of Pleurotus ostreatus.

Materials and Methods:

The study employed hydrolyzed protein solutions prepared from food factory sludge, soybean meal, and slaughterhouse animal feathers. These hydrolyzed protein solutions, containing peptides and amino acid complexes, were tested as nitrogen sources or nutritional additives in the cultivation of Pleurotus ostreatus. Traditional nitrogen sources, such as bran and rice residue from sugar factories, were also included for comparison. The effects of these additives on mycelium growth, yield, and bioconversion rate were meticulously recorded and analyzed.

Results:

The results of the study were unequivocal in demonstrating the positive impact of hydrolyzed protein solutions on the cultivation of Pleurotus ostreatus. The addition of sludge-derived hydrolyzed protein solution notably outperformed other treatments in promoting mycelial growth, achieving a maximum yield of 806 g/bag. Soybean meal and animal feather-derived hydrolyzed protein solutions also enhanced the yield significantly, with the soybean meal additive reaching up to 532 g/bag. These findings underscore the potential of utilizing waste-derived hydrolyzed proteins as effective nutritional additives in mushroom cultivation.

Discussion:

The enhanced growth and yield of Pleurotus ostreatus in the presence of hydrolyzed protein solutions highlight the importance of nitrogen sources in fungal cultivation. By converting waste products into valuable agricultural inputs, this study not only proposes a sustainable approach to mushroom cultivation but also contributes to waste reduction and resource recycling. The superior performance of sludge-derived hydrolyzed protein solution particularly underscores the potential of industrial by-products as a resource for agricultural innovation.

Conclusion:

This study introduces a sustainable and efficient approach to enhancing Pleurotus ostreatus cultivation by utilizing hydrolyzed protein solutions from varied sources. The significant improvements in yield and bioconversion rates demonstrate the efficacy of these additives, offering a promising avenue for sustainable agricultural practices. Future research could explore the optimization of hydrolyzation processes and the potential application of this approach to other crops, further contributing to the circular economy in agriculture.

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Original research was done by Ni Hong,Li Yibo,Chen Ting,Guo Ran,Li Yadong, Ni Hong,Li Yibo,Chen Ting,Guo Ran,Li Yadong

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