Experimental study on rapid start-up of two stage anammox-simultaneous nitrification and denitrification for liquor wastewater treatment
In order to solve high cost and some other problems existing in advanced denitrification process for liquor wastewater treatment,a pilot-scale system of shortcut denitrification-anammox-simultaneous nitrifica-tion and denitrification was used to carry out rapid start-up experimental research.Taking the actual liquor wastewater pretreated by anaerobic process as the influent water of the denitrification system,the mass concen-trations of COD and ammonia nitrogen were 1 100 and 600 mg/L respectively.The experimental process lasted for 150 days in total,the experimental results showed that,treating anaerobic pretreated liquor wastewater with low carbon-nitrogen ratio,the removal rates of COD and total nitrogen in the pilot-scale system were maintained at 92％and 95％respectively,the total nitrogen removal load of the anammox system was 0.4-0.5 kg[TN]/(m3·d).The anammox system could realize total nitrogen removal without external carbon source,therefore could achieve advanced denitrification.In addition,the said denitrification system can achieve rapid start-up and op-erate with low dissolved oxygen.Compared with conventional nitrification and denitrification process,the said process can significantly reduce electric energy and chemical consumption.
liquor wastewateranammoxcombined processshortcut nitrificationsimultaneous nitrification and denitrificationenergy saving and consumption reducing
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