Study on the performance of ultra-high temperature bacteria aerobic composting technology for grease and salt treatment in kitchen waste
The high grease and salt of kitchen waste is important factors affecting its composting effectiveness.Bacillus centered ultra-high temperature bacteria was cultivated from ultra-high temperature environments.The effects of ultra-high temperature flora on composting temperature,material moisture content,pH,and seed germination index during aerobic composting of kitchen waste were investigated,and the changes of microbial populations during aerobic composting were analyzed.The results showed that the aerobic composting temperature of kitchen waste could reach up to 83 ℃ after the addition of ultra-high temperature bacterial,and it could be maintained above 75 ℃ for 6 d,the moisture content decreased from 50.23％to 26.71％,the grease and salt mass fraction was reduced from 1.94％and 3.62％to 0.15％and 0.88％.Their degradation rate was improved by 15.30 percents point and 17.29 percents point compared with the control group without the addition of ultra-high temperature bacterial.Bacillus and Sporosarcina were important genera for the maintenance of ultra-high temperature,while Compostibacillus and Sporosarcina were important for improving the degradation efficiency of grease and salt.Compared with the traditional aerobic composting technology,aerobic composting technology of ultra-high temperature bacteria could effectively improve the degradation efficiency of grease and salt in kitchen waste,and to a certain extent,promote the growth of related bacterial species to improve the maturity of compost.
万方数据
维普
