Coking wastewater treatment technology and its bacterial community structure and function in sludge

Cokingwastewaterisatypicalrefractoryindustrialwastewaterwithhighorganicload.Theincreasingly stringent effluent discharge standards have posed great challenges to traditional coking wastewatertreatmentprocesses.Cokingwastewatertreatmentsystemistypicallyacombinationofpretreatment,biologicaltreatmentandadvancedtreatment.Therein,biologicaltreatment,asthemainbody andthekeysegmentofthewholesystem,hastheadvantagesoflowcostandnosecondarypollution,and playsanimportantroleintheremovalofrefractoryorganicmatter.However,thebiologicalprocessesare generallyconfrontedwiththeproblemsoflowefficiencyandunstableoperationduetotheextremelylow biodegradabilityandlargefluctuationofcokingwastewaterquality.Inviewoftheseproblems,thispaper mainlyreviewstheanalysistechniquesofcokingwastewaterqualityaswellasvariouspretreatment,biologicaltreatmentandadvancedtreatmenttechnologies.Inparticular,themicrobialconsortiumstructure
andfunctionofdegrading-bacteriaofpollutantinthebio-treatmentsectionaresummarized.Thevarious emergingwatertreatmenttechnologiesareprospected.Alltheseresultsprovideatheoreticalbasisforthe optimizationofcokingwastewatertreatmenttechnologyanddevelopmentofthenewtechnologyinthefuture.