Methanogenic degradation of toilet-paper cellulose upon sewage treatment in an anaerobic membrane bioreactor at room temperature
Methanogenic degradation of toilet-paper cellulose upon sewage treatment in an anaerobic membrane bioreactor at room temperature
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DOI：
10.1016/j.biortech.2016.12.089
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发表时间：
2017-03-01
影响因子：
11.4
通讯作者：
Li, Yu-You
中科院分区：
文献类型：
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作者：
Chen, Rong;Nie, Yulun;Li, Yu-You
废纸纤维素是污水中主要的不溶性COD组分，碳源丰富但难降解。采用厌氧膜生物反应器（AnMBR）在常温下处理生活污水，考察了其对卫生纸产甲烷的降解性能。结果表明，AnMBR具有较高的有机物去除率（95%）、较高的甲烷转化率（90%）和较低的污泥产率（0.08 gVSS/gCOD）。草纸纤维素在混合液和膜饼层中无积累，完全生物降解。在2.02 gCOD/L/d的高有机负荷下，卫生纸的生物转化效率接近100%，在大多数有机负荷下，卫生纸可提供总甲烷产量的26%左右。长时间的污泥停留时间和不溶性/可溶性COD组分的共消化实现了功能微生物的互利共生，有助于废纸纤维素的生物降解。因此，AnMBR成功地实现了在室温下同时产甲烷生物转化废纸纤维素和污水中的可溶性COD。(C)2016爱思唯尔有限公司版权所有
Toilet-paper cellulose with rich but refractory carbon sources, are the main insoluble COD fractions in sewage. An anaerobic membrane bioreactor (AnMBR) was configured for sewage treatment at room temperature and its performance on methanogenic degradation of toilet paper was highlighted. The results showed, high organic removal (95%), high methane conversion (90%) and low sludge yield (0.08 gVSS/gCOD) were achieved in the AnMBR. Toilet-paper cellulose was fully biodegraded without accumulation in the mixed liquor and membrane cake layer. Bioconversion efficiency of toilet paper approached 100% under a high organic loading rate (OLR) of 2.02 gCOD/L/d and it could provide around 26% of total methane generation at most of OLRs. Long sludge retention time and co-digestion of insoluble/soluble COD fractions achieving mutualism of functional microorganisms, contributed to biodegradation of toilet-paper cellulose. Therefore the AnMBR successfully implemented simultaneously methanogenic bioconversion of toilet-paper cellulose and soluble COD in sewage at room temperature. (C) 2016 Elsevier Ltd. All rights reserved.