Improving anaerobic digestion of piggery wastewater by alleviating stress of ammonia using biochar derived from rice straw
Improving anaerobic digestion of piggery wastewater by alleviating stress of ammonia using biochar derived from rice straw
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DOI：
10.1016/j.eti.2020.100948
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发表时间：
2020-08-01
影响因子：
7.1
通讯作者：
Song, Guangsen
中科院分区：
文献类型：
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作者：
Cheng, Qunpeng;Xu, Chenxi;Song, Guangsen
在不同铵“应激水平”下，研究了秸秆生物炭对猪舍废水厌氧消化的影响。结果表明，随着NH4+-N浓度从900mg/L增加到3500 mg/L，产气量从1293.27mL下降到402.31 mL， COD去除率从70.68%下降到38.13%。在无铵“胁迫水平”下，随着生物炭投加量从0g增加到15g， COD去除率从70.68%提高到83.75%，沼气产率从1293.27mL提高到2306mL。高铵“胁迫水平”下，随着生物炭投加量从0g增加到15g， COD去除率从38.13%提高到70.38%，沼气产率从382 mL提高到1878 mL。说明生物炭的存在不仅能提高沼气产量，而且能解除氨的抑制作用。(c) 2020 Elsevier B.V.版权所有
In this study, impact of a rice straw-derived biochar on the anaerobic digestion of piggery wastewater was investigated under different ammonium "stress levels". The results showed that the biogas yield was decreased from 1293.27mL to 402.31 mL and the COD removal rate was decreased from 70.68% to 38.13% with the NH4+-N concentration increasing from 900mg/L to 3500 mg/L. At no ammonium "stress level", the COD removal rate was increased from 70.68% to 83.75%, and biogas yield was increased from 1293.27mL to 2306mL with the increase of biochar dosage from 0g to 15g. While with the addition of biochar increasing from 0g to 15g, the COD removal rate was increased from 38.13% to 70.38% and the biogas yield was increased from 382 mL to 1878 mL at high ammonium "stress level". It indicated that the presence of biochar not only could promote biogas yield but also could release the ammonium inhibition. (c) 2020 Elsevier B.V. All rights reserved.