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Effectiveness of sodium sulfite as an electron acceptor for bioenhanced treatment of salt-containing water produced from ASP flooding
Chemosphere ( IF 8.8 ) Pub Date : 2021-05-31 , DOI: 10.1016/j.chemosphere.2021.131002
Xinxin Zhang 1 , Dong Wei 2 , Chunying Li 3 , Li Wei 1 , Min Zhao 4
Affiliation  

The wastewater produced from alkaline-surfactant-polymer (ASP) flooding is a complex multiphase mixture that contains oil, polymers, surfactants and other pollutants and is thus a salt-containing industrial waste recalcitrant to treatments. Through laboratory tests, this study assessed the effectiveness of using sodium sulfite as an electron acceptor for a modified anaerobic baffled reactor (ABR) for removing oil, suspended solids, polymers and surfactants from salt-containing wastewater produced from ASP flooding. During the 90-day operation, the method established in this study successively removed 52.8%, 98.6%, 77.0%, 21.2% and 21.5% of the chemical oxygen demand (COD), oil, suspended solids, polymers and surfactants, respectively, from the wastewater. The changes in organic compounds in the reactor during the treatment were monitored through gas chromatography-mass spectrometry (GC-MS), and the results showed that the established method was very effective in removing alkanes, alkenes, cycloalkanes, aromatic hydrocarbons and esters, and the organic macromolecules in the wastewater were degraded to small molecules. The main bacterial species and microbial communities in the reactor were characterized using molecular biological techniques, and the results indicated that under the stress of high pH and salts, Halomonas sp. gradually dominated and played a major role in degrading hydrocarbons. The findings of this study can aid the development of a cost-effective biological system to treat the water produced from ASP flooding.



中文翻译:

亚硫酸钠作为电子受体对三元复合驱产生的含盐水进行生物强化处理的有效性

碱性表面活性剂聚合物 (ASP) 驱产生的废水是一种复杂的多相混合物,含有油、聚合物、表面活性剂和其他污染物,因此是一种难以处理的含盐工业废物。通过实验室测试,本研究评估了使用亚硫酸钠作为改良厌氧挡板反应器 (ABR) 的电子受体从三元复合驱产生的含盐废水中去除油、悬浮固体、聚合物和表面活性剂的有效性。在 90 天的运行过程中,本研究建立的方法先后去除了 52.8%、98.6%、77.0%、21.2% 和 21.5% 的化学需氧量 (COD)、油类、悬浮固体、聚合物和表面活性剂。废水。通过气相色谱-质谱联用仪(GC-MS)监测处理过程中反应器中有机物的变化,结果表明所建立的方法对烷烃、烯烃、环烷烃、芳烃和酯类的脱除效果非常好,废水中的有机大分子被降解为小分子。利用分子生物学技术对反应器内的主要细菌种类和微生物群落进行了表征,结果表明,在高pH值和盐分胁迫下,盐单胞菌属 在烃类降解中逐渐占主导地位并发挥了主要作用。这项研究的结果有助于开发具有成本效益的生物系统来处理三元复合驱产生的水。

更新日期:2021-06-10
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