Electrically Enhanced Phosphorus Removal and Membrane Fouling Control in an MBR System

A membrane bioreactor (MBR) was used for treating biological aerated filter effluent in a municipal wastewater plant, and chemical phosphorus removal was accomplished in the MBR. The results showed that ferric chloride of 20 mg/L and aluminum sulfate of 30 mg/L were the optimal dosages for total phosphorus (TP) removal, and the TP removal efficiency was over 80%. In long-term continuous operations, both ferric chloride and aluminum sulfate effectively mitigated membrane fouling, with the corresponding growth rate of transmembrane pressure decreased to 0.08 and 0.067 kPa/d, respectively. Sludge particle sizes analysis demonstrated that the decrease of particle sizes lower than 50 μm was the main reason for membrane fouling control. Simultaneously, the proteins and polysaccharide (PS) concentrations in the MBR supernatant were analyzed, and the PS concentration significantly decreased to 2.02 mg/L at aluminum sulfate of 30 mg/L, indicating the flocculation of aluminum sulfate on PS was the main reason for mitigation of membrane fouling.

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Membrane fouling control and enhanced phosphorus removal in an aerated submerged membrane bioreactor using modified green bioflocculant

Bioresource Technology ◽

10.1016/j.biortech.2009.03.057 ◽

2009 ◽

Vol 100 (18) ◽

pp. 4289-4291 ◽

Cited By ~ 39

Author(s):

Huu-Hao Ngo ◽

Wenshan Guo

Keyword(s):

Membrane Fouling ◽

Phosphorus Removal ◽

Membrane Bioreactor ◽

Fouling Control ◽

Submerged Membrane Bioreactor

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Effect of IX dosing on polypropylene and PVDF membrane fouling control

Water Research ◽

10.1016/j.watres.2013.03.056 ◽

2013 ◽

Vol 47 (11) ◽

pp. 3827-3834 ◽

Cited By ~ 13

Author(s):

Darli Theint Myat ◽

Max Mergen ◽

Oliver Zhao ◽

Matthew B. Stewart ◽

John D. Orbell ◽

...

Keyword(s):

Membrane Fouling ◽

Pvdf Membrane ◽

Fouling Control

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The combination effect of preozonation and CNTs layer modification on low-pressure membrane fouling control in treating NOM and EfOM

Journal of Membrane Science ◽

10.1016/j.memsci.2021.119225 ◽

2021 ◽

pp. 119225

Author(s):

Jin Guo ◽

Xuedong Zhu ◽

Qingshan Wang ◽

Weiyan Liu ◽

Yu Wang

Keyword(s):

Membrane Fouling ◽

Low Pressure ◽

Combination Effect ◽

Fouling Control

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Effect of Pre-Oxidation on Coagulation/Ceramic Membrane Treatment of Yangtze River Water

Membranes ◽

10.3390/membranes11050369 ◽

2021 ◽

Vol 11 (5) ◽

pp. 369

Author(s):

Shengji Xia ◽

Xinran Zhang ◽

Yuanchen Zhao ◽

Fibor J. Tan ◽

Pan Li ◽

...

Keyword(s):

Water Treatment ◽

Membrane Fouling ◽

Membrane Filtration ◽

Ceramic Membrane ◽

Membrane Separation ◽

Membrane System ◽

Coagulation System ◽

Fouling Control ◽

Filtration System ◽

Membrane Treatment

The membrane separation process is being widely used in water treatment. It is very important to control membrane fouling in the process of water treatment. This study was conducted to evaluate the efficiency of a pre-oxidation-coagulation flat ceramic membrane filtration process using different oxidant types and dosages in water treatment and membrane fouling control. The results showed that under suitable concentration conditions, the effect on membrane fouling control of a NaClO pre-oxidation combined with a coagulation/ceramic membrane system was better than that of an O3 system. The oxidation process changed the structure of pollutants, reduced the pollution load and enhanced the coagulation process in a pre-oxidation-coagulation system as well. The influence of the oxidant on the filtration system was related to its oxidizability and other characteristics. NaClO and O3 performed more efficiently than KMnO4. NaClO was more conducive to the removal of DOC, and O3 was more conducive to the removal of UV254.

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