title: Rapid production of maggots as feed supplement and organic fertilizer by the two-stage composting of pig manure.
abstract: A two-stage composting experiment was performed to utilize pig manure for producing maggots as feed supplement and organic fertilizer. Seven-day composting of 1.8 ton fresh manure inoculated with 9 kg mixture of housefly neonates and wheat bran produced 193 kg aging maggots, followed by 12 week composting to maturity. Reaching the thermophilic phase and final maturity faster was characteristic of the maggot-treated compost compared with the same-size natural compost. Upon the transit of the maggot-treated compost to the second stage, the composting temperature maintained around 55 °C for 9 days and the moisture decreased to ~40%. Moreover, higher pH, faster detoxification and different activity patterns for some microbial enzymes were observed. There was a strong material loss (35% water-soluble carbon and 16% total nitrogen) caused by the maggot culture in the first stage. Our results highlight a higher economic value of pig manure achieved through the two-stage composting without bulking agents.
authors.affiliation: Institute of Microbiology, College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China.
authors.forename: Feng-Xiang
authors.initials: FX
authors.lastname: Zhu
authors.forename: Wei-Ping
authors.initials: WP
authors.lastname: Wang
authors.forename: Chun-Lai
authors.initials: CL
authors.lastname: Hong
authors.forename: Ming-Guang
authors.initials: MG
authors.lastname: Feng
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Xue
authors.forename: Xiao-Yang
authors.initials: XY
authors.lastname: Chen
authors.forename: Yan-Lai
authors.initials: YL
authors.lastname: Yao
authors.forename: Man
authors.initials: M
authors.lastname: Yu
mesh_terms: D000821:Animal Feed; D000818:Animals; D001419:Bacteria / Q000187:drug effects / Q000201:enzymology; D001673:Biodegradation, Environmental / Q000187:drug effects; D001709:Biotechnology / Q000379:methods*; D001937:Brassica / Q000187:drug effects / Q000254:growth & development; D018553:Cucumis sativus / Q000187:drug effects / Q000254:growth & development; D005308:Fertilizers; D018525:Germination / Q000187:drug effects; D006793:Houseflies / Q000254:growth & development; D007814:Larva / Q000254:growth & development; D008372:Manure / Q000032:analysis*; D009930:Organic Chemicals / Q000494:pharmacology* / Q000633:toxicity; D012987:Soil / Q000737:chemistry*; D034421:Sus scrofa; D013997:Time Factors
chemical_list: D005308:Fertilizers; D008372:Manure; D009930:Organic Chemicals; D012987:Soil