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Reliability analysis of wastewater treatment plants
Oliveira, Sílvia C. ; Von Sperling, Marcos
Water research (Oxford), 2008-02, Vol.42 (4), p.1182-1194
[Periódico revisado por pares]
Oxford: Elsevier Ltd
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Título:
Reliability analysis of wastewater treatment plants
Autor:
Oliveira, Sílvia C.
;
Von Sperling, Marcos
Assuntos:
activated sludge
;
anaerobes
;
anaerobic digestion
;
animal pathogens
;
Applied sciences
;
biochemical oxygen demand
;
biofilters
;
Bioreactors
;
Brazil
;
chemical oxygen demand
;
coliform bacteria
;
Colony Count, Microbial
;
data analysis
;
Effluent quality
;
effluents
;
Enterobacteriaceae - isolation & purification
;
Exact sciences and technology
;
nitrogen
;
Nitrogen - analysis
;
Nitrogen - standards
;
Other industrial wastes. Sewage sludge
;
Performance evaluation
;
phosphorus
;
Phosphorus - analysis
;
Phosphorus - standards
;
Pollution
;
processing stages
;
Reliability
;
reliability analysis
;
septic systems
;
total suspended solids
;
upflow anaerobic sludge blanket reactor
;
Waste Disposal, Fluid - methods
;
Waste Disposal, Fluid - standards
;
waste lagoons
;
Wastes
;
wastewater
;
wastewater treatment
;
Wastewater treatment technologies
;
Water Pollutants - analysis
;
Water Pollutants - standards
;
Water treatment and pollution
É parte de:
Water research (Oxford), 2008-02, Vol.42 (4), p.1182-1194
Notas:
http://dx.doi.org/10.1016/j.watres.2007.09.001
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
Descrição:
This article presents a reliability analysis of 166 full-scale wastewater treatment plants operating in Brazil. Six different processes have been investigated, comprising septic tank+anaerobic filter, facultative pond, anaerobic pond+facultative pond, activated sludge, upflow anaerobic sludge blanket (UASB) reactors alone and UASB reactors followed by post-treatment. A methodology developed by Niku et al. [1979. Performance of activated sludge process and reliability-based design. J. Water Pollut. Control Assoc., 51(12), 2841–2857] is used for determining the coefficients of reliability (COR), in terms of the compliance of effluent biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total nitrogen (TN), total phosphorus (TP) and fecal or thermotolerant coliforms (FC) with discharge standards. The design concentrations necessary to meet the prevailing discharge standards and the expected compliance percentages have been calculated from the COR obtained. The results showed that few plants, under the observed operating conditions, would be able to present reliable performances considering the compliance with the analyzed standards. The article also discusses the importance of understanding the lognormal behavior of the data in setting up discharge standards, in interpreting monitoring results and compliance with the legislation.
Editor:
Oxford: Elsevier Ltd
Idioma:
Inglês
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