Feasibility of using NaCl to reduce membrane fouling in anaerobic membrane bioreactors.
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.
Jixiang
J
Yang
Zheng
Z
Tian
Henri
H
Spanjers
Jules B
JB
van Lier
D000693:Anaerobiosis; D018407:Bacterial Physiological Phenomena; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology; D052918:Environmental Restoration and Remediation / Q000379:methods*; D054712:Salinity; D012965:Sodium Chloride / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000517:prevention & control*
D012965:Sodium Chloride; D062065:Wastewater