An integrated coagulation-ultrafiltration-nanofiltration process for internal reuse of shale gas flowback and produced water 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Separation and Purification Technology
年/卷/期
2019 / 211 /
页码
310-321
ISSN号
1383-5866
作者单位
Sichuan Univ, Inst New Energy & Low Carbon Technol, Key Lab Deep Underground Sci & Engn, Minist Educ, Chengdu 610207, Sichuan, Peoples R China;Sichuan Univ, Inst New Energy & Low Carbon Technol, Key Lab Deep Underground Sci & Engn, Minist Educ, Chengdu 610207, Sichuan, Peoples R China;Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China;Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China;Sichuan Univ, Inst New Energy & Low Carbon Technol, Key Lab Deep Underground Sci & Engn, Minist Educ, Chengdu 610207, Sichuan, Peoples R China;Chinese Natl Petr Corp, Chuanqing Drilling Engn Co Ltd, Chengdu 610081, Sichuan, Peoples R China;Vontron Technol Co Ltd, Guiyang 550018, Guizhou, Peoples R China;Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China;Sichuan Univ, Coll Light Ind Text & Food Engn, Chengdu 610065, Sichuan, Peoples R China;
作者
Chang, Haiqing;Liu, Baicang;Yang, Boxuan;Yang, Xin;Guo, Can;He, Qiping;Liang, Songmiao;Yang, Ping;Chen, Sheng;
摘要
The internal reuse of flowback and produced water (FPW) for another hydraulic fracking is currently the most dominant and economical option but is subject to certain restrictions, including the declined performance of hydraulic fracturing due to residual divalent metal ions. In this study, we investigated the performance of coagulation-ultrafiltration (UF)-nanofiltration (NF) in treating Weiyuan shale gas FPW. Different coagulants (aluminum, iron), dosages (0-1200 mg/L), types of NF membranes (VNF1, NF90, NF270), water recoveries (50-85%) and working pressures (100-400 psi) have been systematically studied and analyzed. The results indicated that (1) aluminum and iron coagulation at optimal dosage decreased OF membrane fouling resistance by 64% and 84%, respectively; coagulation followed by OF was suitable as NF pretreatment; (2) Membrane type significantly influenced permeate flux and contaminant rejection of NF membranes; An decrease in operating pressure (100-200 psi) resulted in a slight fouling suggesting the presence of a limiting flux; (3) Coagulation (iron, 900 mg/L)-UF-NF (200 psi) process removed 99.9% of turbidity, 94.2% of COD and most divalent ions (72.8% of Ca2+, 86.3% of Mg2+, 82.8% of Ba2+, 80.1% of Sr2+ and 91.7% of SO42-). The integrated coagulation-UF-NF process was an effective technology for internal reuse of FPW in shale plays.
机翻摘要
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关键词/主题词
Weiyuan shale gas;Flowback and produced water;Internal reuse;Coagulation-ultrafiltration;Nanofiltration;
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