A study of coking RO concentrated water adsorption treatment by coaly and wood activated carbon and its regeneration experiment
Taking coking RO concentrated wastewater from a steel mill as the research object,using coaly granular activated carbon and wood granular activated carbon for its adsorption treatment;the influence of acti-vated carbon dosage,pH value,and adsorption time on adsorption effect were investigated.At the same time,the research on Freundlich adsorption isotherms of the two kinds of activated carbon was carried out,and effect of re-generation temperature,regeneration time and regeneration frequency on adsorption performance and regeneration loss of regenerated activated carbon,were studied.The results showed that,under the optimal adsorption condi-tion,the removal rates of COD in wastewater treated by coaly and wood activated carbon were 61.1%and 56.3%respectively.The optimal regeneration temperature is 500℃,and the optimal regeneration time of coaly and wood activated carbon are 1.5 and 1.0 h respectively.Multiple regeneration experiments prove that,coaly activat-ed carbon can be regenerated more than 6 times,and its service life is longer than wood activated carbon.
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