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Titolo:
Phosphorus removal characteristics of a combined as-biofilm process cultured by different COD/TP ratios
Autore:
You, SJ; Ouyang, CF; Chuang, SH; Lin, SF;
Indirizzi:
Natl Cent Univ, Grad Inst Environm Engn, Chungli 320, Taiwan Natl Cent Univ Chungli Taiwan 320 nst Environm Engn, Chungli 320, Taiwan Chaoyang Univ Technol, Dept Environm Management, Taichung 413, Taiwan Chaoyang Univ Technol Taichung Taiwan 413 nagement, Taichung 413, Taiwan
Titolo Testata:
ENVIRONMENTAL TECHNOLOGY
fascicolo: 1, volume: 22, anno: 2001,
pagine: 1 - 6
SICI:
0959-3330(200101)22:1<1:PRCOAC>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVATED-SLUDGE; NUTRIENT REMOVAL; DENITRIFICATION; PHOSPHATE; STORAGE; RELEASE;
Keywords:
biological nutrient removal; COD/TP ratio; polyhydroxyalkanoates; phosphorus loading limiting; phosphorus accumulating limiting;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Ouyang, CF Natl Cent Univ, Grad Inst Environm Engn, Chungli 320, Taiwan Natl Cent Univ Chungli Taiwan 320 m Engn, Chungli 320, Taiwan
Citazione:
S.J. You et al., "Phosphorus removal characteristics of a combined as-biofilm process cultured by different COD/TP ratios", ENV TECHNOL, 22(1), 2001, pp. 1-6

Abstract

The COD/TP ratio of influent is an important parameter for the phosphorus removal in a biological nutrient removal (BNR) process. In this study, we investigated the phosphorus removal and denitrification characteristics of acombined activated sludge-biofilm process, as cultured by different influent COD/TP ratios ranged from 12 to 120. Experimental results indicated that, when COD/TP ratios exceeded 30, the removal efficiencies of COD, TN and TP were 98%, 76% and 100%, respectively. However, when the COD/TP ratios were less than 30, the COD removal efficiency still surpassed 98%. but the TP removal efficiency decreased to 41%, and 31.8% when COD/TP ratios were 20 and 12. Moreover, the weight percentage of phosphorus in the sludge attaineda stable value when the COD/TP ratios were below 30. The maximum weight percentage of phosphorus in the sludge was found to be about 6% and, under this condition, the critical COD/TP ratio of influent was 30 of the process under a sludge retention time of 12 days. Although the amount of accumulatedPHAs per mg phosphate released (gamma (PHA/PO4)) remained stable between aCOD/TP ratio of 30 to 120, it increased with a decreased of the COD/TP ratio when the COD/TP ratio was less than 30.

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Documento generato il 29/09/20 alle ore 23:53:08