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Titolo:
Two stage intermittent aeration membrane bioreactor for simultaneous organic, nitrogen and phosphorus removal
Autore:
Seo, GT; Lee, TS; Moon, BH; Lim, JH; Lee, KS;
Indirizzi:
Changwon Natl Univ, Dept Environm Engn, Kyungnam 641773, South Korea Changwon Natl Univ Kyungnam South Korea 641773 ngnam 641773, South Korea Kyungnam Prov Govt Publ Hlth & Environm Inst, Dept Environm Res, Kyungnam 641773, South Korea Kyungnam Prov Govt Publ Hlth & Environm Inst KyungnamSouth Korea 641773
Titolo Testata:
WATER SCIENCE AND TECHNOLOGY
fascicolo: 10-11, volume: 41, anno: 2000,
pagine: 217 - 225
SICI:
0273-1223(2000)41:10-11<217:TSIAMB>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Keywords:
domestic wastewater treatment; submerged membrane bioreactor (SMBR); organic and nutrient removal; oxidation-reduction potential; two stage intermittent aeration; water reuse;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Seo, GT Changwon Natl Univ, Dept Environm Engn, Sarim Dong 9, Kyungnam 641773, South Korea Changwon Natl Univ Sarim Dong 9 Kyungnam South Korea 641773 Korea
Citazione:
G.T. Seo et al., "Two stage intermittent aeration membrane bioreactor for simultaneous organic, nitrogen and phosphorus removal", WATER SCI T, 41(10-11), 2000, pp. 217-225

Abstract

A submerged membrane bioreactor (SMBR) was operated in 2-stage intermittent aeration for simultaneous removal of organic matter, nitrogen and phosphorus. The system consists of two reactors with a total volume of 0.27 m(3) (1st reactor 0.09 m(3) and 2nd 0.18 m(3)). Real domestic wastewater was usedas influent to the system. Membrane used for this experiment was hollow fiber polyethylene membrane with pore size of 0.1 mu m and effective surface area, 4 m(2). The membrane was submerged in the 2nd reactor for suction type filtration. Experiment was carried out in two phases varying the time cycles of aeration and non-aeration. SRT was maintained at 25 days and HRT, 16similar to 19 hours. MLSS concentration in the reactors was in the range of 2,700-3,400 mg/l. The MLSS internal recycling ratio was maintained at 100% of influent flow rate. When time cycles of aeration and non-aeration wereset at 30/90 min and 60/60 min in reactor 1 and 2, the removal of BOD and COD was 98.3% and 95.6%, respectively A relatively low nitrogen and phosphorus removal was observed in this condition (73.6% as T-N and 46.6% as T-P). However, with 60/60 min intermittent aeration conditions for both reactors, the removal rate of nitrogen and phosphorus for two weeks steady state were enhanced to 91.6% as TN and 66% as TP, respectively. Further a high organic removal (98% BOD and 96.2% COD) was achieved too. In these conditions, the membrane of flux declined from 0.1 m/d to 0.08 m/d and suction filtration was at 10 similar to 12 kPa fora month long operation period.

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Documento generato il 19/09/20 alle ore 15:23:23