Evaluation of aerobic biological process with post-ozonation for treatment of mixed industrial and domestic wastewater for potential reuse in agriculture.

Autor: Egbuikwem PN; Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom; Department of Agricultural and Environmental Engineering, School of Engineering Technology, Imo State Polytechnic Umuagwo, P. M. B. 1472, Owerri, Nigeria., Mierzwa JC; Polytechnic School, Department of Hydraulic and Environmental Engineering, Av. Almeida Prado, 83 - Building, Civil Engineering/PHA Butanta, 05508-900, University of Sao Paulo, Sao Paulo, SP, Brazil., Saroj DP; Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom. Electronic address: d.saroj@surrey.ac.uk.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2020 Dec; Vol. 318, pp. 124200. Date of Electronic Publication: 2020 Oct 01.
DOI: 10.1016/j.biortech.2020.124200
Abstrakt: Suspended growth biological process (SGBP) with post-ozonation (O 3 ) was investigated for treatment of simulated complex mixed industrial and domestic wastewater at specific conditions. The SGBP was operated under complete aeration, 30/30-min and 60/30-min on/off aeration cycles and effluent was exposed to ozone at 250 mgO 3 /h fixed dose and contact time 1 to 60-min. The SGBP performance was maximum under 60/30-min aeration conditions achieving 92.1, 90.6, 83.3 and 83.8% reduction in COD, BOD 5 , TN and PO 4 -P respectively. Nitrification (64.1%) was uninhibited even on transition to pulse aeration cycles. The concentrations of diesel oil and methylene blue dye were reduced by 83.6 and 93.5% respectively. Post-ozonation oxidized residual organics up to 19.9%, based on COD measurement, and increased effluent BOD 5 up to 49.5%. The results including the crop growth outcomes indicate that SGBP-O 3 process has great potential to improve the quality of mixed industrial and domestic wastewater considerably for various water reuse applications.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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