Biodegradation of imidacloprid by composting process

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• 作者：Željko Herner ; Dajana Kučić ; Bruno Zelić
• 关键词：Composting process ; Imidacloprid ; Pseudomonas aeruginosa FN ; Kinetics of biodegradation
• 刊名：Chemical Papers
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：71
• 期：1
• 页码：13-20
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering; Biochemistry, general; Medicinal Chemistry; Materials Science, general; Biotechnology;
• 出版者：Springer International Publishing
• ISSN：1336-9075
• 卷排序：71

文摘

This work presents the biodegradation of imidacloprid during composting process in a closed reactor. Composting mass was prepared from fresh vegetable waste, tobacco waste, dry leaves, imidacloprid 1.25 mg/kg (dry solids) and bacterial suspension of Pseudomonas aeruginosa FN. The composting process was carried out under forced aeration (0.516 dm3/min/kg) in a column reactor (10 dm3) under adiabatic conditions over 21 days. In a closed reactor system, the intense biodegradation of imidacloprid was during first 7 days when 68% of imidacloprid was degraded. The conversion and rate of biodegradation of imidacloprid in a closed reactor was much higher and faster than in an open pile. Imidacloprid degradation during composting process was described and simulated as first-order process. Degradation constant and half-life of imidacloprid were estimated in a closed reactor (k_d = 0.135 ± 0.016 mg/kg/day, t_1/2 = 5.13 days) and in an open pile (k_d = 0.025 ± 0.002 mg/kg/day, t_1/2 = 27.88 days).