Removal of organic compounds from shale gas flowback water

被引：62

作者：

Butkovskyi, Andrii ^{[1
]}

Faber, Ann-Helene ^{[2
,3
]}

Wang, Yue ^{[1
]}

Grolle, Katja ^{[1
]}

Hofman-Caris, Roberta ^{[2
]}

Bruning, Harry ^{[1
]}

Van Wezel, Annemarie P. ^{[2
,3
]}

Rijnaarts, Huub H. M. ^{[1
]}

机构：

[1] Wageningen Univ, Dept Environm Technol, POB 17, NL-6700 AA Wageningen, Netherlands

[2] KWR Watercycle Res Inst, POB 1072, NL-3430 BB Nieuwegein, Netherlands

[3] Univ Utrecht, Copernicus Inst Sustainable Dev, Heidelberglaan 2, NL-3584 CS Utrecht, Netherlands

来源：

WATER RESEARCH | 2018年 / 138卷

关键词：

Shale gas; Hydraulic fracturing; Flowback water; Dissolved organic carbon; Aerobic degradation; HYDRAULIC FRACTURING CHEMICALS; GRANULAR ACTIVATED CARBON; WASTE-WATER; BIOLOGICAL TREATMENT; TREATMENT OPTIONS; OZONE TREATMENT; DRINKING-WATER; ADSORPTION; BIODEGRADATION; IMPACTS;

D O I：

10.1016/j.watres.2018.03.041

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ozonation, sorption to granular activated carbon and aerobic degradation were compared as potential treatment methods for removal of dissolved organic carbon (DOC) fractions and selected organic compounds from shale gas flowback water after pre-treatment in dissolved air flotation unit Flowback water was characterised by high chemical oxygen demand and DOC. Low molecular weight (LMW) acids and neutral compounds were the most abundant organic fractions, corresponding to 47% and 35% of DOC respectively. Ozonation did not change distribution of organic carbon fractions and concentrations of detected individual organic compounds significantly. Sorption to activated carbon targeted removal of individual organic compounds with molecular weight >115 Da, whereas LMW compounds remained largely unaffected. Aerobic degradation was responsible for removal of LMW compounds and partial ammonium removal, whereas formation of intermediates with molecular weight of 200-350 Da was observed. Combination of aerobic degradation for LMW organics removal with adsorption to activated carbon for removal of non-biodegradable organics is proposed to be implemented between pretreatment (dissolved air floatation) and desalination (thermal or membrane desalination) steps. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：47 / 55

页数：9

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