Treatment of Saline Industrial Wastewater in an Activated Sludge Unit by Salt-tolerant Microorganisms
Hypersaline wastewater is generated during petrochemical industrial activities. The water contains organic compounds and high concentration of salt, is difficult to treat using conventional microorganisms typically found in wastewater facilities. In this paper, studies were conducted with a moderate halophile isolated from a wastewater treatment plant of China Petroleum & Chemical Corporation (Sinopec). This research was studied to domesticate salt-tolerant microorganism for processing hypersaline wastewater with activated sludge system. Effects of salt concentration on chemical oxygen demand (COD) removal rate from saline wastewater in an activated sludge unit were investigated. COD removal rate decreased with increasing salt concentration due to adverse effects of salt on microorganisms. After a long time for activated sludge domestication, raises salt-tolerant microorganisms that could bear the hypersaline condition. The results indicated that, after domestication salty sludge, with TDS range 12,000 mg/L to 50,000mg/L, the domesticated activated sludge is able to adapt the short-term salinity impact and an average COD removal of over 85% was achieved. COD removal performances of un-domesticated activated sludge and domesticated activated sludge were compared for all salt contents. Specific rates of nutrient removal obtained with the domesticated activated sludge were higher that those of un-domesticated activated sludge, especially at high salt contents.
Activated sludge saline wastewater sodium chloride Salt-tolerant microorganisms.
JI CHENG WANG TINGTING LIAO YAN BO ZHOU JUN LU
Department of Environmental Engineering, East China University of Science & Technology, Shanghai 200237, China
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）