环流反应器中对苯二甲酸废水的生物降解  

Biodegradation of terephthalic acid wastewater in an airlift bioreactor

作　　者：陈筛林[1] 丁富新[1] 杨海光[1] 江田民[1] 

机构地区：[1]清华大学化学工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第6期746-749,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九五"科技攻关项目(99-315-0803)

摘　　要：为有效处理对苯二甲酸废水,在有效容积为35L的环流反应器内,使用模拟废水进行实验研究。投加体积比为5%的多孔聚亚氨酯载体,以实现微生物的固定化和形成缺氧微环境。结果表明,含多孔载体的环流反应器能够有效处理对苯二甲酸废水;生物降解作用是去除对苯二甲酸的主要机制;当反应器COD容积负荷为6.95g.L-1.d-1时,COD和对苯二甲酸的去除率为98%。驯化过程研究表明,采取逐步提高进水中对苯二甲酸浓度并维持一定葡萄糖浓度的策略,能够快速启动反应器,50d达到驯化活性污泥目的。扫描电镜观察表明悬浮相污泥和载体内污泥的微生物形态有明显差别。Experiments in a 35 L airlift bioreactor were conducted to study the biodegradation of artificial terephthalic acid (TA) wastewater. 5% (volume fraction) polyurethane sponges were added into the reactor to immobilize the microorganisms and to form an anoxic zone within the carriers. The results indicated that the terephthalic acid wastewater can be effectively treated by the airlift bioreactor filled with porous carriers, and that biodegradation is the main removal mechanism. The reactor performance in terms of Chemical Oxygen Demand (COD) and TA removal rate exceeded 98% at a COD volumetric loading rate of 6.95 g·L-1·d-1. By gradually increasing the inlet terephthalic acid concentration while keeping the glucose concentration constant, the microorganisms can be acclimated to the culture within 50 d. Scanning electron microscope observation shows significant differences in the microbial population between the suspension and the immobilized sludge.

关 键 词：对苯二甲酸废水 废水处理 生物降解 环流反应器 多孔聚亚氨酯载体 COD 

分 类 号：X780.3[环境科学与工程—环境工程]