氯代苯类有机物生物降解性能的研究

采用连续、完全混合活性污泥法,对重点污染物中六种氯代苯类有机物(氯苯、1,2-二氯苯、1,3-二氯苯、1,4-二氯苯、1,2,4-三氯苯、六氯苯)的生物降解性能进行了研究。试验表明,除六氯苯外,其它五种氯代苯均能被驯化后的微生物所降解。随着苯环上氯取代基的增加,氯代苯的生物降解速率降低。在2B天的连续试验中,六氯苯基本上不能被微生物所降解。

Study on Biodegradability of Benzene Chlorides

Biodegradability of six benzene chloride compounds (chloro-benzene, 1, 2-dichlorobenzcne, 1,3-dichiorcbenzene, 1,4-dich-lorobenzene, 1,2,4-trichlorobenzene, hexachlorobenzene) in the priority pollutants were studied with continuous, completely mixed flow activated sludge reactors. Results showed that, except hexachlorobenzene, all the other five benzene chlorides could be biodegraded by domesticated microorganisms. Bio-degradation rates of the compounds decreases with the increase of chlorine substituents in the benzene ring, and hexa-chlorobezene could not be degaraded by the microorganisms in the test during a period of 28 days.