Development of a novel membrane-based quorum-quenching microbial isolator for biofouling control: Process performance and microbial mechanism

被引：0

作者：

Fu, Yue ^{[1
,2
]}

Wu, Jiajie ^{[1
,2
]}

Wu, Yingxin ^{[1
,2
]}

Yang, Boyi ^{[1
,2
]}

Wang, Xiaolong ^{[1
,2
]}

Xu, Ronghua ^{[1
,2
]}

Meng, Fangang ^{[1
,2
]}

机构：

[1] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China

[2] Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control & R, Guangzhou 510275, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2024年 / 402卷

基金：

中国国家自然科学基金;

关键词：

Wastewater treatment; Membrane bioreactor; Quorum quenching; Membrane isolator; Microbial community; WASTE-WATER; ACTIVATED-SLUDGE; FOULING MITIGATION; BACTERIA; BIOREACTORS; RETENTION; COMMUNITY; STRATEGY; MBR;

D O I：

10.1016/j.biortech.2024.130817

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Quorum quenching (QQ) can mitigate biofouling in membrane bioreactors (MBRs) by inhibiting cell-to-cell communication. However, it is difficult to maintain long-term QQ activity. Here, a novel microbial isolator composed of tubular microfiltration membranes was developed to separate QQ bacteria (Rhodococcus sp. BH4) from sludge. The time to reach a transmembrane pressure of 50 kPa was delayed by 69.55 % (p = 0.002, Student's t test) in MBR with QQ microbial isolator (MBR-Q), compared to that in the control MBR (MBR-C) during stable operation. The concentration of proteins in the extracellular polymeric substances of sludge was reduced by 20.61 % in MBR-Q relative to MBR-C. The results of the bacterial community analyses indicated less enrichment of fouling-associated bacteria (e.g., Acinetobacter) but a higher abundance of QQ enzymes in MBR-Q than in MBR-C. This environmentally friendly technique can decrease the cleaning frequency and increase the membrane lifespan, thus improving the sustainability of MBR technology.

引用

页数：10