摘要
活性污泥经驯化,TA可被微生物降解,且具有较快的降解速度,当降解程度达90％时,平均降解速率为37.3mg COD/gMLSS·h,与进水COD浓度的关系符合Michaelis-Menten公式。在本实验条件下v_(max)为709.2mg COD/L·d,K_m为488.4mg COD/L。在活性污泥作用下,TA降解的中间产物被确定为间羟基苯甲酸和原儿茶酸。
A study on the biodegradability of terephthalic acid (TA) aiming at clarifying its biodegradation characteristics, biodegradation rate and metabolic pathways, by activated sludge was carried out. The results show that terephthalic acid can be biodegtaded rapidly by microorganisms. The relationship between biodegradation rate and the concentration of TA can be fitted into Michaelis-Menten model. The biodeg-raded products from terephthalic acid by activated sludge were identified as m-hydroxybenzoic acid and protocatechuic acid and a metabolic pathway of terephthalic acid was accordingly proposed.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1992年第3期18-24,共7页
Environmental Science
关键词
对苯二甲酸
可生物降解性
污泥
Biodegradation of terephthalic acid, ac-tivated sludge, metabalism of terephthalic acid.
