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Treatment of Effluents from the Textile Industry through Polyethersulfone Membranes
Open AccessArticle

Membrane Fouling and Performance of Flat Ceramic Membranes in the Application of Drinking Water Purification

1
School of Space and Environment, Beihang University, Beijing 100191, China
2
Suntar Membrane Technology (Xiamen) Co. Ptd, Xiamen 361021, Fujian, China
3
Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
4
Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2606; https://doi.org/10.3390/w11122606
Received: 25 October 2019 / Revised: 20 November 2019 / Accepted: 6 December 2019 / Published: 10 December 2019
(This article belongs to the Special Issue Membrane Technologies and Water Treatment)
Membrane technologies have been widely applied in surface water treatment for drinking water purification. The main obstacles to the large scale application of membranes include membrane fouling, energy consumption and high investment. This study systematically investigated the performance of a hybrid system including in-situ coagulation and membrane module. The key parameters of a membrane system, including initial flux, operation mode (intermediate or continuous, time intervals, backwashing and aeration) was comprehensively investigated. In addition, the treatment performance in terms of turbidity, organic matter removal, membrane fouling and cleaning, and the effect of coagulants, were also studied. It was found that flat ceramic membranes with in-situ coagulation for surface water treatment performed much better without aeration and frequent backwashing, which gave interesting and important implications for future applications of a flat ceramic membrane, especially in drinking water purification. The hybrid system can achieve a high-water flux of 150 L/m2·h (LMH) for 8 h operation without aeration and backwash. The removal of turbidity, UV254 and COD can achieve 99%, 85% and 81%, respectively. The cake layer on the membrane surface formed from the coagulation flocs turned out to prevent the membrane to be exposed to organic pollutant immediately which minimized the fouling problem. In addition, the fouling layer on the membrane surface can be easily cleaned by air scouring and backwash at the end of experiments, with a water flux recovery of higher than 90%. These results in this study provided an alternative strategy for membrane fouling control and energy conservation. View Full-Text
Keywords: flat ceramic membrane; drinking water purification; in-situ coagulation; operation parameters; membrane fouling; energy conservation flat ceramic membrane; drinking water purification; in-situ coagulation; operation parameters; membrane fouling; energy conservation
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Meng, S.; Zhang, M.; Yao, M.; Qiu, Z.; Hong, Y.; Lan, W.; Xia, H.; Jin, X. Membrane Fouling and Performance of Flat Ceramic Membranes in the Application of Drinking Water Purification. Water 2019, 11, 2606.

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