Sewage enhanced bioelectrochemical degradation of petroleum hydrocarbons in soil environment through bioelectro-stimulation.

Autor: Mohanakrishna G; Department of Civil and Architectural Engineering, College of Engineering, Qatar University, P O Box 2713, Doha, Qatar., Al-Raoush RI; Department of Civil and Architectural Engineering, College of Engineering, Qatar University, P O Box 2713, Doha, Qatar., Abu-Reesh IM; Department of Chemical Engineering, College of Engineering, Qatar University, P O Box 2713, Doha, Qatar.
Jazyk: angličtina
Zdroj: Biotechnology reports (Amsterdam, Netherlands) [Biotechnol Rep (Amst)] 2020 May 26; Vol. 27, pp. e00478. Date of Electronic Publication: 2020 May 26 (Print Publication: 2020).
DOI: 10.1016/j.btre.2020.e00478
Abstrakt: The impact of readily biodegradable substrates (sewage and acetate) in bioelectroremediation of hydrocarbons (PW) was evaluated in a bench-scale soil-based hybrid bioelectrochemical system. Addition of bioelectro-stimulants evidenced efficient degradation than control operation. Acetate and sewage were exhibited power density of 1126 mW/m 2 and 1145 mW/m 2 , respectively, which is almost 15 % higher than control (without stimulant, 974 mW/m 2 ). Increased electrochemical activity was correlated well with total petroleum hydrocarbons (TPH) degradation through addition of acetate (TPH R , 525 mg/L, 67.4 %) and sewage (TPH R , 560 mg/L,71.8 %) compared to the control operation (TPH R , 503 mg/L, 64.5 %). Similarly, chemical oxygen demand (COD) reduction was also enhanced from 69.0 % (control) to 72.1 % and 74.6 % with acetate and sewage, respectively. Sewage and acetate also showed a positive role in sulfates removal, which enhanced from 56.0 % (control) to 62.9 % (acetate) and 72.6 % (sewage). This study signifies the superior function of sewage as biostimulant compared to acetate for the bioelectroremediation of hydrocarbons in contaminated soils.
Competing Interests: There is no conflict of interest.
(© 2020 The Authors.)
Databáze: MEDLINE
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