DDT在污水库底泥中净化机理的研究

通过定期测定自然污水库底泥内DDT的含量,和室内微生物降解代谢试验,证明:DDT在污水库底泥中含量逐渐减少,主要是由于底泥微生物降解作用的结果。从底泥中分离出来的枯草芽孢杆菌不仅可以降解DDT生成DDD,而且可降解DDD生成DDA和DDM。并通过试验,证明枯草芽孢杆菌降解的作用是一种酶促反应,这种酶的活性部位是在细胞膜部分。这些结果说明了污水库净化的原因。因此,在库内充分发挥底泥微生物的降解作用是消除污染,提高环境质量的一项有效措施。

STUDY ON BIODEGRADATION MECHANISM OF DDT IN SEWAGE SLUDGE OF WASTEWATER RESERVOIR

The results of regular determination of DDT content in the sewage sludge of natural wastewater reservoir and of laboratory experiments on degradation and metabolism of DDT by microorganisms indicated that the content of DDT in the sewage sludge of wastewater reservoir was reduced gradually, in which microorganisms played a very important role.Bacillus subtilis isolated from the sewage sludge not only could metabolize DDT to DDD, but also could convert DDD to DDA and DDM. The results of experiments also show...