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《辽宁省污水综合排放标准》(DB 21/1627—2008),要求污水COD值不大于50mg/L,NH3-N不大于8mg/L,这一标准远远高于国家一级排放标准COD值不大于60mg/L,NH3-N不大于15mg/L,辽宁省新标准也是目前国内最为严格的排放标准。坐落于辽宁省的某石化公司污水处理场设计指标是按照国家一级标准设计的,辽宁省新标准的颁布执行,对该污水处理场提出了更高要求。根据工艺流程,上游生产装置排放的含油污水直接进入污水处理场进行处理。污水处理场稳定达标排放影响因素中,上游生产装置排污影响占60%,污水处理场内部的运行优化占40%。这一比例说明加强上游污水监控对于污水处理场运行起到重要作用。因此,污水处理场若要稳定达标,首先要对上游排污情况了解清楚,制定针对性的应对方案,做好源头治理;另外,污水处理场内部还要做好运行监控工作,优化运行,挖掘运行潜力,做好上下游一体化的协调管理,保证出水水质的达标排放。
The “Integrated Wastewater Discharge Standard of Liaoning Province” (DB 21 / 1627-2008) requires that the effluent COD value is not more than 50mg / L and NH3-N is not more than 8mg / L, which is much higher than the national-level discharge standard COD value Not more than 60mg / L, NH3-N is not more than 15mg / L, Liaoning Province, the new standard is currently the most stringent emission standards. Located in Liaoning Province, a petrochemical company sewage treatment plant design indicators are designed in accordance with national standards, the promulgation and implementation of new standards in Liaoning Province, put forward higher requirements for the sewage treatment plant. According to the technological process, the oily wastewater discharged by the upstream production device directly enters the sewage treatment plant for treatment. Among the factors that affect the steady compliance of the sewage treatment plant discharge, the impact of sewage discharge from the upstream production plant is 60% and the operation optimization within the sewage treatment plant accounts for 40%. This ratio shows that strengthening the upstream wastewater monitoring plays an important role in the operation of the sewage treatment plant. Therefore, the sewage treatment plant to be stable and compliance, we must first understand the situation of the upstream sewage, to develop targeted response programs, good source control; In addition, the sewage treatment plant should also be well within the operation monitoring and control, optimize operation, mining operation Potential, make coordinated management of upstream and downstream integration, to ensure effluent quality compliance discharge.