Abstract
Manure produced from confined animal farms can threaten public and environmental health if not managed properly. Herein, a full-scale commercial bioconversion operation in DeQing County, China for value-added swine manure reduction using house fly, Musca domestica L., larvae is reported. The greenhouse-assisted larvae bioreactor had a maximum daily treatment capacity of 35 m3 fresh raw manure per day. The bioconversion process produced a fresh larvae yield of 95-120 kg m3 fresh raw manure. This process provided an alternative animal foodstuff (having 56.9 and 23.8% protein and total fat as dry matter, respectively), as well as captured nutrients for agricultural re-utilization. Bioconversion reduced odour emission (characterized by 3-methylindole) and the Escherichia coli (E. coli) index by 94.5 and 92.0%, respectively, and reductions in total weight, moisture and total Kjeldahl nitrogen in solids were over 67.2, 80.0 and 76.0%, respectively. Yearly profit under this trial period ranged from US$33.4-46.1 per m3. It is concluded that swine manure larvae bioconversion technology with subsequent production of value-added bio-products can be a promising avenue when considering a programme to reduce waste products in an intensive animal production system.
Original language | English (US) |
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Pages (from-to) | 223-231 |
Number of pages | 9 |
Journal | Waste Management and Research |
Volume | 31 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2013 |
Keywords
- Musca domestica
- animal production
- economic return
- vermicomposting
- waste reduction
ASJC Scopus subject areas
- Environmental Engineering
- Pollution