Performance evaluation for the treatment of municipal sludge and kitchen waste via black solider fly larvae
In the present study,black soldier fly larvae(BSFL)were used to co-treat municipal sludge and kitchen waste mixed at different proportions.Feasibility of co-treatment of both wastes was investigated through evaluating the growth and development,and quality(i.e.,nutrition and heavy metals)of BSFL.The high survival rate(＞93％)of BSFL in all treatments was confirmed.The dry weight(189～299g)of BSFL decreased as the proportion of municipal sludge increased.The proportions of crude fat and protein of larvae accounted for 7.73％～26.81％and 22.80％～36.65％,respectively.Remarkable waste reduction rate of＞57％after the treatments was observed along with high larvae biomass(13.8％～23.9％).As for larvae feces,the contents of organic matter and total nutrition(N,P,and K)reached 60.86％～95.22％and 4.20％～6.58％,respectively.Furthermore,the contents of Cr,Cd,As,Pb and Cu in larvae feces decreased.These findings indicate that BSFL feces are as excellent raw materials made for organic fertilizer.Therefore,BSFL treatment technology is regarded as an feasible approach for valorization of municipal sludge and food waste.
black soldier flymunicipal excess sludgeheavy metalreductionresource utilization
万方数据
维普
