Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling

D. G V De Silva, V. Urbain, D. H. Abeysinghe, Bruce Rittmann

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Mathematical modeling and intensive chemical analysis are used to quantify the relationships among the heterotrophic bacteria, autotrophic bacteria, and key inorganic (NH4 +-N and NO3 --N) and organic (COD) compounds of municipal wastewater treated in a pilot-scale membrane bioreactor (MBR) operated with aerobic-anoxic cycles. Key features of the model for MBR are no biomass in the effluent, partial removal of biomass-associated products by the membrane, and D.O. cycling with 9 mg/L during aeration period and 0.5 mg/L for the anoxic period. The model explains the key trends in the cyclic data: NH4 +-N is consumed only during aerobic periods and rises steadily during anoxic period; NO3 --N is produced only during aerobic periods, but declines in anoxic periods; The soluble COD in treated water mainly consists of BAP and is relatively constant through the cycle. Advantages of introducing an anoxic cycle to the continuous-flow MBR process are reduction of total effluent nitrogen, oxygen consumption, and sludge production as a consequence of denitrification. On the other hand, the anoxic period causes an increase in the average effluent NH4 +-N.

Original languageEnglish (US)
Pages (from-to)505-512
Number of pages8
JournalWater Science and Technology
Volume38
Issue number4-5 -5 pt 4
DOIs
StatePublished - 1998
Externally publishedYes

Fingerprint

Bioreactors
bioreactor
membrane
Membranes
Effluents
effluent
Bacteria
Biomass
bacterium
Denitrification
biomass
Sewage sludge
oxygen consumption
Organic compounds
chemical analysis
aeration
denitrification
organic compound
Wastewater
sludge

Keywords

  • Activated sludge
  • Denitrification
  • Membrane bioreactor
  • Modeling
  • Nitrification
  • Soluble microbial products (SMP)

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling. / De Silva, D. G V; Urbain, V.; Abeysinghe, D. H.; Rittmann, Bruce.

In: Water Science and Technology, Vol. 38, No. 4-5 -5 pt 4, 1998, p. 505-512.

Research output: Contribution to journalArticle

De Silva, D. G V ; Urbain, V. ; Abeysinghe, D. H. ; Rittmann, Bruce. / Advanced analysis of membrane-bioreactor performance with aerobic-anoxic cycling. In: Water Science and Technology. 1998 ; Vol. 38, No. 4-5 -5 pt 4. pp. 505-512.
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