Low-energy hydraulic fracturing wastewater treatment via AC powered electrocoagulation with biochar

JOURNAL OF HAZARDOUS MATERIALS

卷:309

Article

Lobo, Fernanda Leite¹  Wang, Heming¹  Huggins, Tyler¹  Rosenblum, James¹  Linden, Karl G.¹  Ren, Zhiyong Jason¹ 

[1] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA

关键词: Electrocoagulation;    Biochar;    Produced water;    Low energy wastewater treatment;    Hydraulic fracturing;   

DOI  :  10.1016/j.jhazmat.2016.02.020

来源: Elsevier

【 摘 要 】

Produced and flowback waters are the largest byproducts associated with unconventional oil and gas exploration and production. Sustainable and low cost technologies are needed to treat and reuse this wastewater to avoid the environmental problems associated with current management practices (i.e., deep well injection). This study presents a new process to integrate AC-powered electrocoagulation (EC) with granular biochar to dramatically reduce energy use and electrode passivation while achieving high treatment efficiency. Results show achieving a 99% turbidity and TSS removal for the AC-EC-biochar system only used 0.079 kWh/m(3) or 0.15 kWh/kg TSS, which is 70% lower than traditional DC-EC systems and orders of magnitude lower than previous studies. The amount of biochar added positively correlates with energy saving, and further studies are needed to improve organic carbon and salt removal through system integration. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free