Roles of colloidal particles and soluble biopolymers in long-term performance and fouling behaviors of submerged anaerobic membrane bioreactor treating methanolic wastewater

被引：29

作者：

Lu, Xueqin ^{[1
,2
,3
]}

Zheng, Chaoting ^{[1
]}

Zhen, Guangyin ^{[1
,3
,4
,5
]}

Tan, Yujie ^{[1
]}

Zhou, Yuhan ^{[1
]}

Zhang, Zhongyi ^{[1
]}

Niu, Chengxin ^{[1
]}

Li, Wanjiang ^{[1
]}

Kudisi, Dilibaierkezi ^{[1
]}

Wang, Yue ^{[1
]}

Li, Yu-You ^{[6
]}

机构：

[1] East China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, Sch Ecol & Environm Sci, 500 Dongchuan Rd, Shanghai 200241, Peoples R China

[2] Inst Ecochongming IEC, 3663 N Zhongshan Rd, Shanghai 202162, Peoples R China

[3] Shanghai Engn Res Ctr Biotransformat Organ Solid, Shanghai 200241, Peoples R China

[4] Shanghai Inst Pollut Control & Ecol Secur, 1515 North Zhongshan Rd 2, Shanghai 200092, Peoples R China

[5] Minist Nat Resources, Technol Innovat Ctr Land Spatial Ecorestorat Metr, 3663 N Zhongshan Rd, Shanghai 200062, Peoples R China

[6] Tohoku Univ, Grad Sch Engn, Dept Civil & Environm Engn, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF CLEANER PRODUCTION | 2021年 / 290卷

基金：

中国国家自然科学基金;

关键词：

Submerged anaerobic membrane bioreactor; Methanolic wastewater; Membrane fouling; Methanogenic process;

D O I：

10.1016/j.jclepro.2021.125816

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Anaerobic membrane bioreactor (AnMBR) has been applied as a promising technology for treating a variety of industrial wastewaters. Nevertheless, the potential of AnMBR for methanolic wastewater treatment is still not well recognized. In this study, a lab-scale AnMBR fed with low-strength methanolic wastewater was operated for 166 days with stepwise decreased HRT, and the roles of colloidal particles and soluble biopolymers in membrane fouling behaviors were elucidated comprehensively. The results showed that AnMBR showed the desirable performance and process stability with total chemical oxygen demand removal of 89.8 +/- 1.1% and the highest methane production rate of 5.49 L/L-reactor/d at organic loading rate of 20.00 g-COD/L-reactor/d and hydraulic retention time of 18 h. The serious membrane fouling was observed after a period of operation at low HRT or high OLR due to the production of colloidal particles and the liberation of soluble biopolymers. Decreased particle size, and increased adhesion forces of gel-like flocs caused by the secretion of hydrophobic protein-bearing biopolymers accelerated the deposition of foulants and the formation of cake layer, inducing the easily mitigated membrane fouling. Further observations proved that the main bioconversion pathway of methanolic wastewater to biomethane was methylotrophic methanogenesis, followed by acetotrophic/hydrogenotrophic processes. Collectively, although the membrane fouling cannot be eliminated, this research confirmed the technical feasibility of AnMBR for methanolic wastewater treatment in real-world applications. (c) 2021 Elsevier Ltd. All rights reserved.

引用

页数：13

共 53 条

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