饱和带有机污染物的厌氧反硝化微生物降解

以卤代烃和芳香烃为代表，通过室内实验模拟饱和带厌氧反硝化环境，对地下饱和带中有机污染物的厌氧反硝化可生物降解性，降解机理，降解动力学方程等进行了研究。实验结果表明，芳香烃较卤代烃易被微生物降解，在有低学葡萄糖存在时有 机物的最大生物降解速率Ｃ６Ｈ６：Ｌｍａｘ＝１７ｍｇ／（ｍ＾２．ｄ），Ｃ７Ｈ８：Ｌｍａｘ＝４６ｍｇ／（ｍ＾２．ｄ），ＣＣｌ４；Ｌｍａｘ＝７ｍｇ／（ｍ＾２．ｄ），ＣＨＣｌ３：Ｌｍａｘ＝６

Anaerobic Biodegradation of Organic Contaminants under Denitrifying Conditions in Groundwater Zones

A series of laboratory experiments were conducted to study anaerobic biodegradation of organic contaminants under denitrifying conditions in aquifer columns simulating saturated flow typical for a groundwater infiltration system. This study focused on the anaerobic biodegradation mechanism and biodegradation rates equation. The experiment's data suggested than both aromatic hydrocarbons and halogenated hydrocarbons were degraded under anaerobic denitrifying conditions, but aromatic hydrocarbons were degraded more rapidly than halogenated hydrocarbons. The biodegradation rates equation was established and solved using Monod kinetics. Based on the solved results of equation, the maximum biodegradation rates (L_max) of all hydrocarbons under anaerobic denitrifying conditions with low concentration of C₆H₁₂O₆ are as following: C₆H₆:L_max=17mg/(m²·d),C₇H₈:L_max=46mg/(m²·d),CCl₄:L_max=7mg/(m²·d),CHCl₃:L_max=6mg/(m²·d),which were higher than those without C₆H₁₂O₆.