Biological Nitrification for Petrochemical Wastewater Using Suspended Carrier Biological Reactor
XIA Si qing, GAO Ting yao, ZHOU Zeng yan (State Key Laboratory of Pollution Control and Resource Reuse Research, Tongji University, Shanghai 200092,China)
A novel pilot scale suspended carrier biological reactor (SCBR) has been developed to study biological treatment for wastewater from petrochemical industry in the SCBR, at The Wastewater Treatment Plant of Shanghai Petrochemical Company. The HRTs of 6h, 8h, 10h and 12h was investigated to test the nitrification process to find out what level of ammonia nitrogen removal that could be obtained under different operation conditions. The study showed that the SCBR was suitable for nitrification purposes. When the influent concentrations of BOD 5 and COD Cr varied in a range of 77.4～234.0 mg·L -1 and 245.5～695.7 mg·L -1 , the average removal efficiencies were 90% and 80%, and the average effluent concentrations were less than 15mg·L -1 and 90mg·L -1 for BOD 5 and COD Cr , respectively. During the test period the ammonia nitrogen concentrations varied from 8.3 to 53.2 mg·L -1 , the corresponding average removal efficiencies were 55.5%, 86.7%, 91.1% and 95.6%, and average effluent concentrations were 9.43 mg·L -1 , 3.1 mg·L -1 , 1.71 mg·L -1 ,and 0.79 mg·L -1 , respectively at HRTs of 6h, 8h, 10h and 12h.
【CateGory Index】： X703