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为了解决有机磷农药对环境造成的持久性污染,文章研究了利用厌氧消化法来降解有机磷农药。厌氧消化的原料采用废弃大白菜,有机磷农药采用乐果。利用乐果对乙酰胆碱酯酶具有抑制作用得原理,采用分光光度法测定乐果在废弃白菜厌氧消化系统(湿发酵)中的浓度变化。实验结果表明乐果农药在厌氧消化系统中具有降解趋势,初始乐果滴入量越少厌氧消化罐中的乐果降解周期越短,在实验所设置的厌氧消化系统负荷之下,160 mg·L~(-1)的乐果是此系统能够消解的极限。实验结果同时表明,乐果的浓度达到90 mg·L~(-1)以上时,逐渐开始出现对厌氧消化系统产沼气的抑制作用,系统的产沼气能力降低,乐果浓度在150 mg·L~(-1)以上时已对产气造成了严重抑制。
In order to solve the persistent pollution caused by organophosphorus pesticides to the environment, the article studied the use of anaerobic digestion to degrade organophosphorus pesticides. Anaerobic digestion of raw materials used discarded cabbage, organophosphate pesticides using dimethoate. The use of dimethoate inhibition of acetylcholinesterase principle, the spectrophotometric determination of dimethoate in abandoned anaerobic digestion system (wet fermentation) concentration changes. The results showed that dimethoate pesticides had a tendency of degradation in the anaerobic digestion system. The less the initial dimethoate was dropped, the shorter the degradation period of dimethoate in anaerobic digestion tank. Under the anaerobic digestion system load, 160 mg · L -1 of dimethoate is the limit to be able to digest this system. The experimental results also showed that when the concentration of dimethoate was more than 90 mg · L -1, the biogas production from anaerobic digestion system gradually began to decline, and the biogas production capacity of the system was reduced. The dimethoate concentration was 150 mg · L -1 L ~ (-1) above the gas production has been severely inhibited.