Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences/Shandong Provincial Key Laboratory of Deep Processing Technology of Agricultural Product, 202# Gongye North Road, Jinan, 250100, People's Republic of China.
Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, 250100, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Oct;24(28):22152-22157. doi: 10.1007/s11356-017-9052-z. Epub 2017 Apr 28.
In this study, fast atrazine degradation by the mixed bacterial cultures from sewage sludge was investigated. The acquired activated cultures showed great capability in atrazine degradation. The biodegradation process was well fitted into a pseudo-first reaction kinetic model. Atrazine could inhibit the propagation of ammonium oxidation bacteria and nitrite oxidation bacteria, decreasing the ammonium removal rate and the accumulation of nitrite. Only 162-172 reads of Nitrosomonadaceae and no Nitrospirales were detected after atrazine was exposed to the mixed cultures. The bacterial community structures in the cultures under different inoculation conditions (with or without atrazine) were investigated to explore the mechanism of atrazine degradation. Our results show that the genera Thiobacillus and Ferruginibacter were the most possible candidates responsible for the degradation of atrazine.
本研究考察了来自污水污泥的混合细菌培养物对莠去津的快速降解作用。获得的活性培养物显示出很强的莠去津降解能力。生物降解过程很好地符合拟一级反应动力学模型。莠去津能抑制氨氧化菌和亚硝酸盐氧化菌的繁殖，降低氨去除率和亚硝酸盐的积累。暴露于混合培养物后，硝化单胞菌科的 162-172 个读数和硝化螺菌目均未检测到。在不同接种条件（有或没有莠去津）下研究了培养物中的细菌群落结构，以探讨莠去津降解的机制。研究结果表明，硫杆菌属和铁还原菌属可能是降解莠去津的最主要候选菌。
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