Dynamic analysis of self-forming dynamic membrane (SFDM) filtration in submerged anaerobic bioreactor: Performance, characteristic, and mechanism

Fengkai Sun; Na Zhang; Fazhan Li; Xia Wang; Jian Zhang; Lianfa Song; Shuang Liang

doi:10.1016/j.biortech.2018.09.003

Dynamic analysis of self-forming dynamic membrane (SFDM) filtration in submerged anaerobic bioreactor: Performance, characteristic, and mechanism

Bioresour Technol. 2018 Dec:270:383-390. doi: 10.1016/j.biortech.2018.09.003. Epub 2018 Sep 3.

Authors

Fengkai Sun¹, Na Zhang¹, Fazhan Li², Xia Wang³, Jian Zhang¹, Lianfa Song⁴, Shuang Liang⁵

Affiliations

¹ Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China.
² School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China.
³ State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, Shandong, China.
⁴ Department of Civil and Environmental Engineering, Texas Tech University, 10th and Akron, Lubbock, TX 79409-1023, USA.
⁵ Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China. Electronic address: liangshuang@sdu.edu.cn.

PMID: 30243246
DOI: 10.1016/j.biortech.2018.09.003

Abstract

This study attempts to provide an improved fundamental understanding of the self-forming dynamic membrane (SFDM) filtration process in submerged anaerobic bioreactors. Excellent system performances were achieved in terms of high COD removal efficiency (∼ 90%), fast formation/reformation of SFDM (<1 h), and sustainable low-resistance (3.92 × 10¹⁰ m^-1) high-flux (10-30 L/m²·h) filtration. A typical flux-variation profile consisted of an initial abruptly fast decrease followed by a gradually slow reduction, corresponding to the formation and sustainable operation period, respectively. The increase of SFDM resistance in formation period was attributable to the fast deposition of large particles on coarse-pore support materials. After SFDM formation, the subsequent increase of SFDM resistance was controlled more by the increase of specific resistance, which was firstly mainly resulted from the increasing accumulation of small particles with higher hydrophobicity and the external deposition of eEPS but later most attributable to the increase of internal release of eEPS.

Keywords: Dynamic analysis; Membrane bioreactor (MBR); Membrane fouling; Self-forming dynamic membrane (SFDM); Submerged anaerobic membrane bioreactor.

MeSH terms

Anaerobiosis
Bioreactors*
Filtration
Hydrophobic and Hydrophilic Interactions
Membranes, Artificial
Waste Disposal, Fluid / methods

Substances

Membranes, Artificial