Construction of a Composite Bacteria for Degrading Kitchen Waste and Research on Its Processs
At present,with the growth of China′s population,the production of kitchen waste is also a sharp increase in the trend,the use of microbial technology is an effective way to achieve the reduction of kitchen waste and improve the reuse value.In this study,three strains of bacteria(Bacillus amyloliquefaciens,Bacillus subtilis,Bacillus licheniformis)obtained from the natural fermentation of kitchen waste were separated and screened as test objects,and the fuzzy comprehensive judgment method was used to investigate the optimal compound ratio of the composite bacterial agent,and on the basis of obtaining the optimal composite bacterial agent,the single-factor test and the response surface test were used to optimize the process of treating kitchen waste.The results showed that the optimal composite bacterial agent ratio for treating kitchen waste was Bacillus amyloliquefaciens∶Bacillus subtilis∶Bacillus licheniformis=1∶0.5∶1,at this time,the fuzzy comprehensive judgment score of 93.56 points.The results of the response surface test showed that the optimal process for treating kitchen waste was as follows:composite bacterial agent additive amount of 0.20%,the fermentation temperature of 44.00℃,the fermentation time of 21.00 h,reaction initial pH 6.0,and the degradation rate of kitchen waste was(33.02±0.62)%.The results of orchid planting trials showed that kitchen waste,after fermentation,can provide the nutrients needed for plant growth and promote plant growth.The above results can provide theoretical basis for the reduction and efficient reuse of kitchen waste in China.
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