Bioconversion of Different Manure of Animal by Black Soldier Fly Larvae(Hermetia illucens L.)

WANG Cong; YE Xiaomei; DU Jing; WANG Li

doi:10.19672/j.cnki.1003-6504.1491.23.338

Abstract：To study the effect of biotransformation and the changes in chemical and physical properties,carbon and nitrogen distribution of different livestock and poultry manure treated by black soldier fly larvae(BSFL),the 5-days-old larvae were used to transform pig manure,cow manure,duck manure,and chicken manure.The relevant indexes of animal manure before and after transformation were determined.The results showed that the nutrients of different livestock and poultry manure could satisfy the growth of BSFL,and the fresh weight of BSFL in pig and chicken manure(189.23 g and 193.45 g)was signif-icantly higher than that in cow and duck manure(167.68 g and 178.18 g).The reduction rate and biotransformation rate of BSFL to pig manure and chicken manure were 63.23%,65.49%,33.66%,and 35.09%respectively,but the reduction rate and biotransformation rate of cow manure were the lowest,40.98%and 20.48%respectively.After transformation,the dissolved organic carbon,ammonium nitrogen,and nitrate nitrogen in animal manure decreased significantly.The dissolved organic carbon decreased by 29.06%(pig manure),24.69%(cow manure),27.01%(chicken manure)and 24.93%(duck manure),respectively.Ammonium nitrogen decreased by 88.01%(pig manure),59.38%(cow manure),85.57%(chicken manure),and 79.12%(duck manure)respectively.18.32%and 19.47%of carbon and 33.24%and 35.56%of the nitrogen in pig manure and chicken manure were converted into protein and fat by BSFL,while 70.21%and 65.36%of carbon and 42.36%and 41.36%of nitrogen were retained in the frass.Whereas the BSFL had low utilization of carbon and nitrogen in the cow manure,14.46%of carbon and 27.43%of nitrogen were used for the growth of the insect.77.68%carbon and 54.68%of nitrogen were remained in the frass.In conclusion,BSFL can effectively transform different animal manure,recycle carbon and nitrogen.The transformed insect frass has the potential to be a high-quality bioorganic fertilizer.