Polytetrafluoroethylene (PTFE) hollow fiber AnMBR performance in the treatment of organic wastewater with varying salinity and membrane cleaning behavior

Jing Li; Changwang Jiang; Wansheng Shi; Feiyue Song; Di He; Hengfeng Miao; Tao Wang; Jingxuan Deng; Wenquan Ruan

doi:10.1016/j.biortech.2018.07.063

Polytetrafluoroethylene (PTFE) hollow fiber AnMBR performance in the treatment of organic wastewater with varying salinity and membrane cleaning behavior

Bioresour Technol. 2018 Nov:267:363-370. doi: 10.1016/j.biortech.2018.07.063. Epub 2018 Jul 20.

Authors

Jing Li¹, Changwang Jiang¹, Wansheng Shi¹, Feiyue Song¹, Di He¹, Hengfeng Miao¹, Tao Wang¹, Jingxuan Deng¹, Wenquan Ruan²

Affiliations

¹ School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China.
² School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi 214122, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China. Electronic address: wqruan@jiangnan.edu.cn.

PMID: 30031274
DOI: 10.1016/j.biortech.2018.07.063

Abstract

PTFE hollow fiber anaerobic membrane bio-reactor (AnMBR) performance was investigated in the treatment of organic wastewater, with varying salinity and PTFE membrane cleaning behavior. The AnMBR was operated for 226 days, with a total and biological COD removal efficiency of 97.2% and 89.9% respectively, at a NaCl concentration of 35 g L^-1. A high number of Proteobacteria (38.2%) and Bacteroidetes (25.9%) were present in the system, with an increase in membrane fouling rate from 1.88 × 10¹¹ to 2.63 × 10¹¹ m^-1 d^-1 with higher salinity. The effects of soluble microbial products (SMP), extracellular polymeric substances (EPS), low molecular-weight (LMW) carbohydrates, sludge particle size and inorganic element accumulation, were evaluated on membrane fouling. Flux recovery of fouled PTFE membranes reached 91.6% with offline cleaning. Overall, results indicate that PTFE hollow fiber AnMBR provides a promising method for the treatment of saline organic wastewater.

Keywords: Anaerobic membrane bioreactor; Molecular weight; Particle size distribution; Polytetrafluoroethylene; Saline organic wastewater.

MeSH terms

Anaerobiosis
Bioreactors
Membranes, Artificial
Polytetrafluoroethylene*
Salinity*
Sewage
Waste Disposal, Fluid*
Wastewater*
Water Purification

Substances

Membranes, Artificial
Sewage
Waste Water
Polytetrafluoroethylene