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| Effects of mushroom bran addition on the process and NH3 emissions of swine feces residue composting |
| Received:September 30, 2016 |
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| KeyWord:swine feces residue;mushroom bran;compost;bulking agent;NH3 emissions |
| Author Name | Affiliation | E-mail | | WU Fei-long | Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou 350003, China | | | YE Mei-feng | Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou 350003, China | | | WU Xiao-mei | Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou 350003, China | | | LIN Dai-yan | Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou 350003, China | lindaiyan@126.com | | WENG Bo-qi | Fujian Academy of Agriculture Sciences, Fuzhou 350003, China | |
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| Abstract: |
| Using the solid-liquid separated swine feces residue from large-scale pig farm as the test object, the effects of mushroom bran as bulking agent on the process and NH3 emissions of composting were studied. In this study, four different mass ratios(wet basis) of swine feces residue and mushroom bran, 1:0.2, 1:0.3, 1:0.4, 1:0.5, were set as test groups with a control group of pure swine feces residue. The results showed that:The addition of mushroom bran shortened the time needed for the swine feces residue composting to reach a high temperature, which is conducive to compost dehydration; With the increase of mushroom bran proportion, the dry matter degradation rate and the organic carbon loss rate decreased in all test groups. After composting, the total nitrogen, phosphorus and potassium contents increased in all control and test groups, while the increment of total phosphorus and potassium content reduced with the increase amount of mushroom bran proportion; The NH3 emissions during swine feces residue composting reduced while proportion of mushroom bran was greater than 0.3; After 36 d of composting, all the control and test groups were thoroughly decomposed, and the total nutrients of composting products were in line with the standard of < organic fertilizer >, NY 525-2012. |
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