摘要
为了探讨苯系化合物的生物降解途径,选用从石油化工污水处理场曝气池活性污泥中富集的混合菌种,在好氧条件下,研究了苯、甲苯、乙基苯、邻-、间-和对二甲苯的可生物降解性。当化合物的浓度为50—140 mg/L时,6种被试验化合物均可被微生物降解,从该混合菌种中筛选出17株可降解甲苯、乙基苯、三甲苯、邻-、间-和对二甲苯的单一菌种,其中邻二甲苯和间二甲苯的降解率可达100%,在本实验体系下,检出了甲苯的生物降解中间产物。
This paper reported the biodegradability of benzene, toluene, ethylbenzene, o-, m- and p-xylene by mixed bacteria, which were enriched from activated sludge of petrochemical wastewater treatment plant, under aerobic condition. When the concentration of the tested compounds were 50—140 mg/L, the six tested compounds can be biodegrade. Seventeen bacteria strains were sifted from the mixed bacteria, they can biodegrade toluene,ethylbenzene, trimethybenzene, o-, m- and p-xylene.The ratio of o -and m-xylene were 100% by sifting bacteria. The results indicated that the biodegradability of the compounds strongly depends on its chemical component and structure. At the test system, the biodegradable order of the six tested compounds was.. toluene, p-xylene,m-xylene, ethylbenzene, benzene and o-xylene. The intermediates of toluene degraded were detected and was pathway for toluene degraded at aerobic condition.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1996年第5期8-12,共5页
Environmental Science
基金
国家自然科学基金资助项目
关键词
苯系化合物
生物降解
活性污泥
石油化工
biodegradability,benzene,toluene,ethylbenzene,activaty sludge,wastewater treatment
