The Effects on Phosphorus Removal and Membrane Pollution by Adding PAC and Ca²⁺ into MBR under Different Dosing Methods

Abstract:

This article studied effluent water quality and membrane fouling by adding different concentration of polyaluminium chloride (PAC) into the submerged membrane bioreactor (MBR) in different dosing ways, and examined the effects on coagulation by adding Ca²⁺. Experiment results show that dosing ways of PAC have no significant influence on CODCr and NH3-N. When the concentration of PAC was 45mg/L and the continuous dosing way was chosen, the average concentration of pollutant was lowest, total phosphorus (TP) removal efficiency was highest, and the membrane fouling was effectively slowed. When the Ca²⁺ concentration was 20mg/L, the coagulation effect was the best, water quality was stable, and the membrane fouling was largely reduced.

• Periodical: Applied Mechanics and Materials (Volume 733)
• Pages: 342-345
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.733.342
• Online since: February 2015
• Authors: Hai Rong Mi, Zhi Liu Zhang*, Zhen Chao
• Keywords: Ca²⁺, Membrane Fouling, PAC, Submerged Membrane Bioreactor (MBR)

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