摘要
《石油炼制工业污染物排放标准》(GB31570-2015)的实施,对炼油企业污水排放提出了更严格的要求,炼油企业面临污染物稳定达标排放的严峻形势。本文对西部某炼油企业污水生化处理系统宏观水质进行评价,综合分析了新标准实施前307天进、出水水质特性并与新标准进行了对标分析,表明污水处理系统运行存在水质波动大,生化系统出水CODCr、氨氮和石油类都有超标风险,尤其是系统的氨氮超标率较高,生化系统的硝化效果较差等问题。因此需要强化上游生产装置排水的预处理和隔油、气浮装置的运行管理。出水水质的对标分析表明除苯之外的大部分溶解性有机物和重金属可以达到新标准要求,因此需要强化苯系物的去除,日常运营中还需加强总氮的监测,强化污水处理系统上游气浮和隔油池的运行。综上所述,在新标准实施条件下,该炼油企业需要强化炼油系统点源污水的治理,减轻其对生化系统的冲击,还需对生化工艺的硝化和反硝化效果进行强化,以期实现石油类、CODCr、氨氮和总氮等各类污染物的稳定达标,同时需要进一步监测总氮的达标情况。
Due to the implementation of the new wastewater discharge standard for oil-refining industry(GB31570-2015), the performance of the activated sludge system was comprehensively investigated at the wastewater treatment plant in an oil refinery in western China. By monitoring the water quality for 307 days, the influent fluctuated substantially and the CODCr, ammonia,nitrogen and petroleum in the effluent posed risks of exceeding the limits in the standard. The comparison of the effluent with the standard indicated that all the indexes except for benzene and petroleum met the standard(GB31570-2015). It is necessary to strengthen the pretreatment of the point-sources of wastewater and enhance the nitrification effect of the activated sludge process.Attention should also be paid to the removal of benzene.
作者
孔繁鑫
王业腾
陈进富
郭春梅
KONG Fanxin;WANG Yeteng;CHEN Jinfu;GUO Chunmei(College of Chemical Engineering and Environment,China University of Petroleum-Beijing,Beijing 102249,China)
出处
《石油科学通报》
2020年第3期429-434,共6页
Petroleum Science Bulletin
基金
中国石油大学青年拔尖人才项目(No.2462019BJR004)资助。
