CBR法处理高盐高聚合物海上油田废水中试试验
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摘要
高盐高聚合物海上油田废水成分复杂、难降解,对污水处理系统造成多方面的影响,目前已成为油田废水处理的热点和难点。针对某原油处理厂的高盐高聚合物废水,采用生物碳粉循环工艺(CBR法)开展中试试验,结果表明,该法流程短,占地少,系统操作弹性高,一次性投入成本和运行成本较低。在CBR工艺的微生物分解转化及活性碳吸附协同作用下,专性生物膜生物相丰富,COD去除率在85.6%～93.9%之间,氨氮去除率超过99%,石油类去除率在85.3%～97.6%之间,总氮去除率在89.3%～94.8%之间,TOC去除率在87.9%～89.3%之间,BOD_5去除率在92.2%～93.5%之间,主要污染物去除效果稳定。
Offshore oilfield wastewater with high salinity and high polymer is difficult to degrade due to its complex composition, which affects the wastewater treatment system in many aspects and becomes a hot and difficult problem in oilfield wastewater treatment. This paper is to carry out a pilot test with carbon bio-recirculation(CBR) method to treat the high salinity/high polymer wastewater in a crude oil processing plant. The results show that the method has the merits of short process, less land occupation, high operation flexibility, low one-off input cost and low operation cost. Under the synergistic effect of microbial decomposition and activated carbon adsorption in CBR process, the removal rates of main pollutants are stable between 85.6% and 93.9% for COD, at more than 99%for NH_3-N, between 85.3% and 97.6% for oil, between 89.3% and 94.8% for TN, between 87.9% and 89.3% for TOC, and between 92.2% and 93.5% for BOD_5.
Offshore oilfield wastewater with high salinity and high polymer is difficult to degrade due to its complex composition, which affects the wastewater treatment system in many aspects and becomes a hot and difficult problem in oilfield wastewater treatment. This paper is to carry out a pilot test with carbon bio-recirculation(CBR) method to treat the high salinity/high polymer wastewater in a crude oil processing plant. The results show that the method has the merits of short process, less land occupation, high operation flexibility, low one-off input cost and low operation cost. Under the synergistic effect of microbial decomposition and activated carbon adsorption in CBR process, the removal rates of main pollutants are stable between 85.6% and 93.9% for COD, at more than 99%for NH_3-N, between 85.3% and 97.6% for oil, between 89.3% and 94.8% for TN, between 87.9% and 89.3% for TOC, and between 92.2% and 93.5% for BOD_5.
引文
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[5]朱米家.电絮凝强化处理聚合物驱油废水及机理研究[D].北京:北京科技大学,2018.
[6]安迪.聚合物驱采油废水化学需氧量的分析[J].黑龙江环境通报,2017,41(1):39–41.
[7]李雪晴.粉末活性碳加强型膜生物反应器对污水中新型污染物的去除[J].水处理技术,2017,43(12):19–22.