Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India.
Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India.
Bioresour Technol. 2017 Mar;227:56-65. doi: 10.1016/j.biortech.2016.12.020. Epub 2016 Dec 12.
The aim of this work was to study the biodegradation of Malathion in batch and continuous packed bed (Polyurethane foam; PUF) bioreactor (PBBR). After 10days, 89% Malathion removal was observed in batch PBBR. Continuous PBBR was operated at various flow rates (5-30mL/h) under optimum condition over a period of 75days. Inlet loading rates and elimination capacities were observed in the range of 36-216 and 7.20-145.4mg/L/day with an average removal efficiency of more than 90% under steady state conditions. GC/MS analysis confirms phosphorodithionicacid,O,O,S-trimethylester and diethylmercaptosuccinate as metabolites. Biodegradation of Malathion under inhibitory and non-inhibitory conditions was studied using Monod and Andrew-Haldane models and the kinetic constants were calculated and found to be μ: 0.271 per day; K: 126.3mg/L using Monod and μ: 0.315 per day; K: 151.32mg/L; K: 594.75mg/L using Andrew-Haldane models.
这项工作的目的是研究马拉硫磷在批量和连续填充床（聚氨酯泡沫；PUF）生物反应器（PBBR）中的生物降解。在 10 天内，批量 PBBR 中观察到 89%的马拉硫磷去除。在最佳条件下，连续 PBBR 在 75 天的时间内以 5-30mL/h 的不同流速运行。在入口负荷率和消除容量范围内观察到 36-216 和 7.20-145.4mg/L/天，在稳态条件下平均去除效率超过 90%。GC/MS 分析证实了代谢物为 O,O,S-三甲基膦酸酯和二乙基硫代丁二酸酯。使用 Monod 和 Andrew-Haldane 模型研究了马拉硫磷在抑制和非抑制条件下的生物降解，并计算了动力学常数，发现 Monod 模型中的 μ：每天 0.271；K：126.3mg/L；μ：每天 0.315；K：151.32mg/L；K：Andrew-Haldane 模型中的 594.75mg/L。
