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Titolo:
Aerobic MBRs for domestic wastewater treatment: a review with cost considerations
Autore:
Gander, M; Jefferson, B; Judd, S;
Indirizzi:
Cranfield Univ, Sch Water Sci, Cranfield MK43 0AL, Beds, England CranfieldUniv Cranfield Beds England MK43 0AL ld MK43 0AL, Beds, England
Titolo Testata:
SEPARATION AND PURIFICATION TECHNOLOGY
fascicolo: 2, volume: 18, anno: 2000,
pagine: 119 - 130
SICI:
1383-5866(20000306)18:2<119:AMFDWT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROSS-FLOW MICROFILTRATION; MEMBRANE SEPARATION BIOREACTOR; ACTIVATED-SLUDGE PROCESS; WATER TREATMENT; NITROGEN REMOVAL; FLUX; PERFORMANCE; MECHANISMS; BEHAVIOR; REACTOR;
Keywords:
bacteria and virus rejection; biological removal; commercial units; energy costs; fouling remediation; membrane fouling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Judd, S Cranfield Univ, Sch Water Sci, Cranfield MK43 0AL, Beds, England Cranfield Univ Cranfield Beds England MK43 0AL 0AL, Beds, England
Citazione:
M. Gander et al., "Aerobic MBRs for domestic wastewater treatment: a review with cost considerations", SEP PURIF T, 18(2), 2000, pp. 119-130

Abstract

Membrane bioreactors (MBRs) present a means of intensively biologically treating high COD or BOD wastewaters but, like other membrane processes, are constrained by their tendency to foul. Fouling is the general term given tothose phenomena responsible for increasing membrane hydraulic resistance. It can be reduced by maintaining turbulent conditions, operating at sub-critical flux and/or by the selection of a suitable fouling-resistant membranematerial. The performance of various MBRs is appraised with reference to (i) foulingpropensity, and (ii) removal of organics and microorganisms. Energy costs for the two process configurations for MBRs, submerged and side-stream, arereported with particular attention paid to aeration and recycle pumping costs. A number of commercial plants treating domestic wastewater are described, with further details of the most recent full-scale MBR for sewage treatment tabulated. It is shown that the side-stream configuration has a higher total energy cost, by up to two orders of magnitude, compared with the submerged system due to the recycle component. The submerged configuration operates more costeffectively than the side-stream configuration with respect to both energyconsumption and cleaning requirements, with aeration providing the main operating cost component as it is required for both mixing and oxygen transfer. On the other hand, the lower flux under which the submerged system operates implies a higher membrane area and thus a higher associated capital cost. It is concluded that the MBR is a highly effective treatment process forwastewater treatment in areas requiring a high quality effluent (such as discharge to bathing waters or water reuse) or specialisation in the microbial community (e.g, high strength liquors, effective nitrification). (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 10:07:51