利用水力压裂技术对石油和天然气生产过程中产生的废水进行藻类处理。
Algal treatment of wastewater generated during oil and gas production using hydraulic fracturing technology.
作者信息
Lutzu Giovanni Antonio, Dunford Nurhan Turgut
机构信息
a Robert M. Kerr Food & Agricultural Products Center , Oklahoma State University , Stillwater , OK , USA.
b Department of Biosystems and Agricultural Engineering , Oklahoma State University , Stillwater , OK , USA.
出版信息
Environ Technol. 2019 Mar;40(8):1027-1034. doi: 10.1080/09593330.2017.1415983. Epub 2017 Dec 19.
Hydraulic fracturing technology is widely used for recovering natural gas and oil from tight oil and gas reserves. Large volumes of wastewater, flowback water, are produced during the fracturing process. This study examines algal treatment of flowback water. Thirteen microalgae strains consisting of cyanobacteria and green algae were examined. Wastewater quality before and after algae treatment, as well as volatile matter, fixed carbon and ash contents of the biomass grown in flowback water were examined. The experimental results demonstrated that microalgae can grow in flowback water. The chemical composition of the algal biomass produced in flowback water was strain specific. Over 65% total dissolved solids, 100% nitrate and over 95% boron reduction in flowback water could be achieved. Hence, algal treatment of flowback water can significantly reduce the adverse environmental impact of hydraulic fracturing technology and produce biomass that can be converted to bioproducts.
水力压裂技术被广泛用于从致密油气藏中开采天然气和石油。在压裂过程中会产生大量的废水，即返排液。本研究考察了利用藻类处理返排液。研究了包括蓝藻和绿藻在内的13种微藻菌株。检测了藻类处理前后的废水水质，以及在返排液中生长的生物质的挥发物、固定碳和灰分含量。实验结果表明，微藻能够在返排液中生长。在返排液中产生的藻类生物质的化学成分具有菌株特异性。返排液中总溶解固体的去除率超过65%，硝酸盐的去除率达到100%，硼的去除率超过95%。因此，利用藻类处理返排液可以显著降低水力压裂技术对环境的不利影响，并产生可转化为生物产品的生物质。
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