Influence of fine coal gasification slag on greenhouse gases emission and volatile fatty acids during pig manure composting
2020
Liu, Tao | Kumar Awasthi, Mukesh | Kumar Awasthi, Sanjeev | Ren, Xiuna | Liu, Xiangyu | Zhang, Zengqiang
This study was evaluated industrial waste fine coal gasification slag (FCGS) as an additive on pig manure composting by parameters of greenhouse gases, NH₃, volatile fatty acids (VFAs) and maturity. Six treatments of FCGS (0%, 2%, 4%, 6%, 8% and 10%) were added into the mixture raw material and composted 42 days. Results illustrated that the FCGS amendment could prolong sanitation stage and promote the degree of maturity, germination index and C/N ratio during composting. With the increasing amendment of FCGS, GI was increased from 9.97 to 28.45%. Compared with control, increasing of FCGS proportion could reduce the mitigation of global warming potential (N₂O and CH₄), NH₃ and cumulative of VFAs from 8.89–77.04%, 3.81–71.65%, 5.18–28.02% and 8.79–83.33%. Finally, present study results revealed that 10%FCGS could improve composting and reduced the maturity period as well as compost quality, thus recommended as effective dosage for efficient pig manure composting.
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