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Feasibility of Using NaCl to Reduce Membrane Fouling in Anaerobic Membrane Bioreactors
Author(s) -
Yang Jixiang,
Tian Zheng,
Spanjers Henri,
Lier Jules B.
Publication year - 2014
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143013x13807328849657
Subject(s) - fouling , bioreactor , salinity , saline , pulp and paper industry , wastewater , chemistry , membrane fouling , membrane , membrane bioreactor , chromatography , coagulation , sewage treatment , sodium , chemical engineering , environmental engineering , environmental science , biochemistry , biology , psychology , ecology , organic chemistry , psychiatry , engineering , endocrinology
The objective of this research study is to assess the feasibility of naturally occurring Na + ions in wastewater as a possible coagulant to control the fouling of AnMBR under high salinity conditions. A multi‐bladed stirrer was installed in the reactor, which aimed at providing a good mixing condition for inducing coagulation. The rotation speed of the stirrer was set at 30 rpm for achieving the coagulation effect. A sludge was cultured in a saline environment with sodium concentration as high as 13 g/L. It was observed that, the applied conditions could not provide a high saline sludge with a good filterability. In addition, results of Fourier transform infrared spectroscopy showed that the functional groups of the cake layer formed by the saline sludge was similar to that of non‐saline sludge, therefore, the high salinity should promote the formation of a gel layer.