UASB/Flash aeration enable complete treatment of municipal wastewater for reuse

A simple, efficient and cost-effective method for municipal wastewater treatment is examined in this paper. The municipal wastewater is treated using an upflow anaerobic sludge bed (UASB) reactor followed by flash aeration (FA) as the post-treatment, without implementing aerobic biological processes...

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Veröffentlicht in:Bioprocess and biosystems engineering 2012-08, Vol.35 (6), p.907-913
Hauptverfasser: Khan, Abid Ali, Gaur, Rubia Zahid, Lew, Beni, Diamantis, Vasileios, Mehrotra, Indu, Kazmi, A. A
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container_issue 6
container_start_page 907
container_title Bioprocess and biosystems engineering
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creator Khan, Abid Ali
Gaur, Rubia Zahid
Lew, Beni
Diamantis, Vasileios
Mehrotra, Indu
Kazmi, A. A
description A simple, efficient and cost-effective method for municipal wastewater treatment is examined in this paper. The municipal wastewater is treated using an upflow anaerobic sludge bed (UASB) reactor followed by flash aeration (FA) as the post-treatment, without implementing aerobic biological processes. The UASB reactor was operated without recycle, at hydraulic retention time (HRT) of 8 h and achieved consistent removal of BOD, COD and TSS of 60–70% for more than 12 months. The effect of FA on UASB effluent post-treatment was studied at different HRT (15, 30 and 60 min) and dissolved oxygen (DO) concentrations (low DO = 1–2 mg/L and high DO = 5–6 mg/L). The optimum conditions for BOD, COD and sulfide removal were 30–60 min HRT and high DO concentration inside the FA tank. The final effluent after clarification was characterized by BOD and COD values of 28–35 and 50–58 mg/L, respectively. Sulfides were removed by more than 80%, but the fecal coliform only by ~2 log. The UASB followed by FA is a simple and efficient process for municipal wastewater treatment, except for fecal coliform, enabling water and nutrients recycling to agriculture.
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subjects Aeration
Bacteria
Biochemical oxygen demand
Biodegradation
Biological and medical sciences
bioprocessing
Bioreactors
Bioreactors - microbiology
Biotechnology
chemical oxygen demand
Chemistry
Chemistry and Materials Science
coliform bacteria
cost effectiveness
Dissolved oxygen
engineering
Environmental Engineering/Biotechnology
Food Science
Fundamental and applied biological sciences. Psychology
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Methods. Procedures. Technologies
Municipal wastewater
nutrients
Original Paper
Oxygen - metabolism
Oxygen Consumption - physiology
Reactors
Retention time
Sewage - microbiology
Sludge
Sludge bed
Sulfides
Sulfides - metabolism
upflow anaerobic sludge blanket reactor
Various methods and equipments
Waste Disposal, Fluid - methods
Wastewater reuse
Wastewater treatment
Water Purification - methods
Water reuse
Water treatment
title UASB/Flash aeration enable complete treatment of municipal wastewater for reuse
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