Environmental Science and Pollution Research Pub Date : 2021-02-12 , DOI: 10.1007/s11356-021-12830-z Bo Shao 1 , Xu Tan 1 , Ju-Long Li 1 , Mei He 1, 2 , Lei Tian 2, 3 , Wen-Jie Chen 1 , Yan Lin 4
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Cost-efficient and environmentally friendly treatment of hydraulic fracturing effluents is of great significance for the sustainable development of shale gas exploration. We investigated the synergistic effects of plant-microbial treatment of shale gas fracturing waste fluid. The results showed that illumination wavelength and temperature are direct drivers for microbial treatment effects of CODCr and BOD5, while exhibit little effects on nitrogen compounds, TDS, EC, and SS removals as well as microbial species and composition. Plant-microbial synergism could significantly enhance the removal of pollutants compared with removal efficiency without plant enhancement. Additionally, the relative abundance and structure of microorganisms in the hydraulic fracturing effluents greatly varied with the illumination wavelength and temperature under plant-microbial synergism. 201.24 g water dropwort and 435 mg/L activated sludge with illumination of 450–495 nm (blue) at 25 °C was proved as the best treatment condition for shale gas fracturing waste fluid samples, which showed the highest removal efficiency of pollutants and the lowest algal toxicity in treated hydraulic fracturing effluents. The microbial community composition (36.73% Flavobacteriia, 25.01% Gammaproteobacteria, 18.55% Bacteroidia, 9.3% Alphaproteobacteria, 4.1% Cytophagia, and 2.83% Clostridia) was also significantly different from other treatments. The results provide a potential technical solution for improved treatment of shale gas hydraulic fracturing effluents.
Graphical abstract
中文翻译：
通过植物-微生物协同作用增强对页岩气压裂废液的处理
具有成本效益和环保的水力压裂废水处理方法对页岩气勘探的可持续发展具有重要意义。我们研究了页岩气压裂废液的植物-微生物处理的协同效应。结果表明，照射波长和温度是COD Cr和BOD 5微生物处理效果的直接驱动力。，但对氮化合物，TDS，EC和SS去除以及微生物种类和组成影响很小。与没有植物增强的去除效率相比，植物-微生物协同作用可以显着提高污染物的去除。另外，在植物-微生物协同作用下，水力压裂废水中微生物的相对丰度和结构随照射波长和温度的变化而变化很大。事实证明，在25°C下照射450.495-495 nm（蓝色）时，可得到201.24 g的水滴麦汁和435 mg / L的活性污泥，是页岩气压裂废液样品的最佳处理条件，显示出最高的污染物去除率和处理后的水力压裂废水中藻类毒性最低。微生物群落组成（36.73％ 黄杆菌，25.01％丙酸杆菌，18.5％ 细菌，9.3％丙酸杆菌，4.1％细胞吞噬和2.83％梭状芽胞杆菌也与其他治疗有显着差异。结果为改善页岩气水力压裂废水的处理提供了潜在的技术解决方案。
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