炼化污水的厌氧生物预处理技术

炼化污水中污染源以难降解有机物为主,降低污水生物毒性,提高其可生化性是炼化污水达标排放的关键环节。为降低工艺运行成本及产泥量,同时为后续好氧生化处理提供优质水源,实验采用高效厌氧生物反应器处理炼化污水,探讨炼化污水厌氧处理过程中的COD去除率、能源转化效能、微生物菌群变化、可生化性及有机污染物降解效果。结果表明,该反应器对炼化污水COD平均去除率达70.01%,出水中大分子复杂难降解有机污染物转化为以小分子有机酸类为主的有机物,可生化性明显提高,为后续生物处理提供良好运行条件。

Treatment of refining wastewater using a highly efficient anaerobic biological reactor as pretreatment technology

Refractory organics are the primary organic pollutants of refining wastewater.Reduction of biological toxicity and improvement of biodegradability is the key unit in treating refining wastewater.To reduce running cost and residual sludge,at the same time to provide favorable conditions for subsequent aerobic biochemical treatment,a highly efficient anaerobic biological reactor (ABR) was used as a pretreatment technology.The performance of high efficient ABR treating refining wastewater was investigated in terms of COD removal efficiency,energy conversion efficiency,change of microbial population,biodegradability and organic pollutants degradation efficiency.The result showed that the COD average removal efficiency was 70.01%.The biodegradability of treated wastewater was improved and the major pollutants were converted to small organic acids creating favorable conditions for subsequent biological treatment.