The influence of operating conditions on the filtration behavior of actual extracellular polymeric substances (EPS) using dead-end membrane filtration cell

Zhan Wang Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186Correspondence[email protected] [email protected]

Longyue Shi Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Yin Song Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Wenyue Dong Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Yuenan Zhou Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Jing Zhang Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Liying Yang Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

Qian Zhang Department of Chemistry and Chemical Engineering, College of Environment and Energy Engineering, Beijing University of Technology, Beijing, P.R. China, 100124 Phone: Tel. +86 (10) 6739 6186 Fax: Tel. +86 (10) 6739 6186

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Abstract

The EPS solution extracted from the activated sludge of sequencing batch reactors (SBRs) by the formaldehyde–NaOH extraction method was filtered in dead-end cell with 0.1 μm PVDF micro filtration membrane under various operating conditions, and the filtration behaviors of actual EPS solution were investigated. The experimental results show that: firstly, the membrane filtration mechanism is governed by cake filtration, and the cake is compressible; secondly, the cake specific resistance increased with the increase of transmembrane pressure (TMP) and decreased as the concentration increased; thirdly, all operating conditions had a significant influence on the cumulative filtrate volume (CFV) of actual EPS solution; finally, the CFV increased with the rise of temperature and TMP, but decreased as EPS concentration increased. The sequence of influence degree of operating conditions is the temperature (38.1%) > the TMP (34.8%) > the EPS concentration (27.1%). A quantitative regression relationship between the CFV and the temperature (T), TMP (ΔP) and EPS concentration (C) was obtained as follows:

CFV = − 3.7 × 10⁻⁸C + 5.79 × 10⁻⁷T + 1.27 × 10⁻⁴ΔP

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The influence of operating conditions on the filtration behavior of actual extracellular polymeric substances (EPS) using dead-end membrane filtration cell

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The influence of operating conditions on the filtration behavior of actual extracellular polymeric substances (EPS) using dead-end membrane filtration cell

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