对-氯代苯胺(PCA)在填充床生物反应器中的降解作用  

Degradation of p chloroaniline(PCA) in packed bed bioreactor.

作　　者：万登榜[1] 惠阳[1] 陈云霞[1] 丘昌强[1] 

机构地区：[1]中国科学院水生生物研究所

出　　处：《应用生态学报》1998年第3期313-317,共5页Chinese Journal of Applied Ecology

基　　金：湖北省自然科学基金

摘　　要：以氯代苯胺（ＰＣＡ）为选择基质，用驯化技术从降解对二氯苯（ｐＤＣＢ）的富集培养物中得到了以同化ＰＣＡ为唯一碳源和氮源的混合微生物．将这种固定在填充床反应器中的微生物用于ＰＣＡ的降解作用研究中．在该反应器里，ＰＣＡ的生物降解遵循Ｌｏｇｉｓｔｉｃ方程ｑ＝ｑｍａｘ／（１＋ｅα－βＵｖ）．由方程求出了主要的动力学常数，Ｋｓ（半速率常数）和ｑｍａｘ（最大比基质降解速率）．于ＰＣＡ降解的同时，释放氯离子到培养基中．在水力停留时间３ｈ，进水ＰＣＡ浓度为３６０ｍｇ·Ｌ－１情况下，基质的体积降解率达到１２５ｍｇ·Ｌ－１·ｈ－１；基质的百分去除率为９１％．With p chloroaniline(PCA) as a selected substrate, the mixed microorganisms assimilating it as the sole source of carbon and nitrogen were obtained by acclimation technique from the enriched cultural products of degraded p dichlorobenzen(p DCB). The mixed microorganisms immobilized in a packed bed reactor were used to degrade PCA. In the packed bed bioreactor, the biodegradation of PCA followed the Logistic equation, q = q max /(1+e α-β Uv ). The major kinetic parameters, K s (half velocity constant) and q max (maximum specific substrate degradation rate), were calculated. PCA was found to be degraded with a concomitant release of chloride ions into the substrate. Under the conditions of residence time of 3 hours and inlet stream at PCA concentration of 360mg·L -1 , the volumetric degradation rate of the substrate was 125mg·L -1 ·h -1 , with removal efficiency of 91%.

关 键 词：废水处理 生物反应器 对-氯代苯胺 微生物降解 

分 类 号：X780.3[环境科学与工程—环境工程]