污泥驯化和共代谢对吡啶和苯降解特性的研究

利用瓦氏呼吸仪测定微生物耗氧量的方法,研究了焦化废水及其中难降解有机污染物吡啶、苯的降解特性,并对吡啶和苯分别与苯酚共基质条件下的可生化性进行了研究。结果表明,pH值为7.2时,焦化废水降解率最高;当浓度小于40mg/L时,吡啶和苯可以部分被降解,浓度大于60mg/L时微生物呼吸作用明显地被抑制;污泥驯化有利于有机污染物降解速率的提高。初步分析了共代谢降解焦化废水中难降解有机污染物的生理生化特性。

Study on Biodegradation Characteristics of Pyridine and Benzene by Activated Sludge Acclimation and Co-metabolism

Adopting Warburg respirometer to measure oxygen consuming, biodegradation characteristics of coke plant wastewater and the refractory organics of pyri-dine and benzene, under the condition of co-substrate with chlorobenzene has been studied. The result showed that when pH was 7.2, the rate of coke plant waste-water biodegrading was encouraging. Under lower concentration of 40mg/L, pyridine and benzene could be degraded partly, and when concentration was higher than 60mg/L, they inhibited microorganism respiration obviously. Acclimation of activated sludge is helpful for improving the degrading speed of refractory organics. The characteristics of co-metabolism of refractory organics in coke plant wastewater was known preliminarily, which is important and useful for the deeply treatment of coke plant wastewater.