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Treatment of hypersaline wastewater with A/DAT-IAT biofilm process

WANG Fa-zhen~(1,2),CHEN Xi~2,JIANG Jin-yuan~2,ZHOU Yue-xi~2,XIE Qiang~1(1 College of Chemistry and Environmental Engineering,China University of Mining and Technology Beijing,Beijing 100083,China;2 Water Pollution Control Technology Laboratory,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)  
The present paper aims at introducing the authors' simulation study of the industrial wastewater purification process with the salinity 60 000 mg/L(mark using NaCl),so as to heighten the removing efficiency of the wastewater in an A/DAT-IAT reactor with suspended filler put into the reactor.As is known,with the industrial development,the quantity of high salinity wastewater has been increasing from year to year,but there are still no satisfactory treating methods available in this way.Therefore,it is of great urgency to explore and enhance the corresponding research so as to work out more efficient treating processes.Our simulation results indicate that under the condition of hydraulic retention time(HRT) 13 h,pH 7.5 and temperature 25 ℃,the desirable influent COD_(Cr), NH~+_4-N,PO~(3-)_4-P should be 907.4-1 210.0 mg/L,86.2-99.7 mg/L,3.6-5.1 mg/L respectively.While the average removing efficiency of COD_(Cr),NH~+_4-N,PO~(3-)_4-P should be 70.6%,38.6%,93.5% respectively with the average effluent SS being 198 mg/L.In so doing,the removing efficiency of COD_(Cr),PO~(3-)_4-P can be much better than the traditional used sludge-processing method.
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