Biological Ion Exchange Process in Water Treatment:A Review
Natural organic matter and emerging contaminants in water pose a threat to water ecosystems and human health.Therefore,one of the main areas of research in the water treatment field is the elimination of these pollutants.Adsorption and ion exchange is a typical water treatment method.However,because of regeneration,this process produces a lot of concentrated liquid waste,raising the danger of pollutant discharge and increasing treatment costs.The biological ion exchange(BIEX)process has been proposed by some researchers in the past few years.Through secondary ion exchange and biodegradation,the BIEX process can be run for an extended amount of time to accomplish advanced treatment.It is possible to remove 30％～80％of natural organic matter from surface water,and 60％～100％of emerging contaminants including caffeine,ibuprofen,estradiol,and so forth.Therefore,BIEX process significantly reduces the need for regeneration chemicals and the waste liquid produced when using traditional ion exchange resins.This paper provides an overview of recent research on the operational performance and fundamental mechanics of the BIEX process.
Natural organic matterEmerging contaminantsResinBiological ion exchangeAdvanced treatment
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