International S&T Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China.
Bioresour Technol. 2017 Mar;228:69-76. doi: 10.1016/j.biortech.2016.12.089. Epub 2016 Dec 25.
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 (0.08gVSS/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 2.02gCOD/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.
富含但难降解碳源的卫生纸纤维素是污水中主要的不可溶性 COD 物质。为在室温下处理污水，配置了一个厌氧膜生物反应器（AnMBR），并强调了其对卫生纸甲烷降解的处理性能。结果表明，在 AnMBR 中可实现高有机去除率（95%）、高甲烷转化率（90%）和低污泥产率（0.08gVSS/gCOD）。卫生纸纤维素在混合液和膜饼层中没有积累，被完全生物降解。在 2.02gCOD/L/d 的高有机负荷率（OLR）下，卫生纸的生物转化效率接近 100%，在大多数 OLR 下，它可提供约 26%的总甲烷生成量。长污泥停留时间和不可溶性/可溶性 COD 物质的共消化，实现了功能微生物的共生，有助于卫生纸纤维素的生物降解。因此，AnMBR 成功地在室温下同时实现了污水中卫生纸纤维素和可溶性 COD 的甲烷生物转化。
