天然气净化厂污水处理工艺改造研究

Study on the Modification of Treatment Process for the Wastewater from Natural Gas Purification Plant

摘要: 天然气净化厂排放的污水具有污染物种类多、有机物浓度高、可生化性差、水质水量波动大等特点，传统污水处理工艺已难以满足日益严格的排放标准。针对这一问题，文章以四川某天然气净化厂污水处理站改造项目为工程背景，研究应用了以UASB反应器、微气泡气浮装置、一体化MBR膜生物反应器等为核心的多级协同污水处理工艺，考察了该工艺对净化厂排出污水的COD等指标的去除效果。结果表明，经组合工艺处理后，污水的COD去除率可稳定在96%以上，出水COD浓度稳定在15 mg/L以下，满足排放要求。研究结果对天然气净化厂污水的达标处理具有一定的参考价值。

Abstract: The wastewater discharged from natural gas purification plants is characterized by a wide variety of pollutants, high organic concentration, poor biodegradability, and large fluctuations in water quality and quantity. As a result, traditional wastewater treatment processes are hardly able to meet the increasingly strict discharge standards. In this paper, based on Sewage Treatment Plant Renovation Project, a modified treatment process integrated with a UASB reactor, a microbubble air flotation device, and a packaged MBR membrane was constructed, and the removal effect on COD and other indicators was investigated. The results showed that, with the treatment of this combined process, the COD removal rate was maintained above 96%, and the effluent COD was retained below 15 mg/L, meeting the discharge standards. This research could have certain reference value for the treatment of wastewater from natural gas purification plants.