摘要:
以某涂料废水为研究对象,采用实验检测废水中BTEX浓度和模式计算挥发量相结合的研究方法,对BTEX污染物在污水处理过程中的迁移降解与去除途径进行研究,分析隔油、气浮、氧化沟工艺对苯系物去除效果,同时研究了吸附、挥发和生物降解3大去除途径对苯系物去除的影响。研究表明,该工艺对BTEX的去除效率高,苯的总去除效率为88.11%,甲苯、乙苯、邻二甲苯和间、对二甲苯总去除率分别高达98.14%、98.09%、97.45%和97.68%。其中苯、甲苯、乙苯、邻二甲苯主要都是在氧化沟中去除,间、对二甲苯在气浮池和氧化沟都有较高的去除率,隔油池工艺对BTEX的去除率较低。去除途径方面,苯以挥发为主,甲苯、乙苯和邻二甲苯都以生物降解为主要去除途径,而挥发和生物降解对间、对二甲苯的去除作用相当。
关键词:
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BTEX
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迁移降解
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挥发
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污泥吸附
Abstract:
Taking the wastewater from one paint factory as the object of research, adopting the method that combining measuring the BTEX concentration in the wastewater with model calculating the amount of volatilization, this study mainly researched the process of transference of BTEX in the wastewater disposal, analyzed separating oil, floatation and oxidation ditch steps effect a change of dislodging of the benzene, meanwhile, investigated the effects of adsorption, volatilization and biodegradation on the removal efficiency of benzene. The removal efficiency of benzene is 88.11%, similarly, the removal efficiencies of toluene, ethylbenzene, o-xylene, m,p-xylene are 98.14%, 98.09%,97.45%,97.68% respectively. Toluene, ethylbenzene and oxylene were dislodged mainly in oxidation ditch, besides, m,pxylene was removed mainly in oxidation ditch as well as in floatation pool, but the separation system was bad in dislodging BTEX. The best removal process of benzene is volatilization, and that of toluene, ethylbenzene, o-xylene is biodegradation, while that of m,p-xylene is volatilization as well as biodegradation.