Abstract
This paper shows the potential application of a new sewage treatment process with technologies of excess sludge reduction and phosphorus recovery. The process incorporated ozonation for excess sludge reduction and crystallisation process for phosphorus recovery to a conventional anaerobic/oxic (A/O) phosphorus removal process. A lab-scale continuous operation experiment was conducted with the ratio of sludge flow rate to ozonation tank of 1.1 % of sewage inflow under 30 to 40 mgO3/gSS of ozone consumption and with sludge wasting ratio of 0.34% (one-fifth of a conventional A/O process). Throughout the operational experiment, a 60% reduction of excess sludge production was achieved in the new process. A biomass concentration of 2,300 mg/L was maintained, and the accumulation of inactive biomass was not observed. The new process was estimated to give a phosphorus recovery degree of more than 70% as an advantage of excess sludge reduction. The slight increase in effluent COD was observed, but the process performance was maintained at a satisfactory level. These facts demonstrate an effectiveness of the new process for excess sludge reduction as well as for phosphorus recovery.
| Original language | English |
|---|---|
| Pages (from-to) | 217-227 |
| Number of pages | 11 |
| Journal | Water Science and Technology |
| Volume | 53 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2006 |
| Externally published | Yes |
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Keywords
- Biological phosphorus removal
- Excess sludge reduction
- Phosphorus recovery
ASJC Scopus subject areas
- Water Science and Technology
Cite this
Operation of a new sewage treatment process with technologies of excess sludge reduction and phosphorus recovery. / Saktaywin, W.; Tsuno, H.; Nagare, Hideaki; Soyama, T.
In: Water Science and Technology, Vol. 53, No. 12, 2006, p. 217-227.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Operation of a new sewage treatment process with technologies of excess sludge reduction and phosphorus recovery
AU - Saktaywin, W.
AU - Tsuno, H.
AU - Nagare, Hideaki
AU - Soyama, T.
PY - 2006
Y1 - 2006
N2 - This paper shows the potential application of a new sewage treatment process with technologies of excess sludge reduction and phosphorus recovery. The process incorporated ozonation for excess sludge reduction and crystallisation process for phosphorus recovery to a conventional anaerobic/oxic (A/O) phosphorus removal process. A lab-scale continuous operation experiment was conducted with the ratio of sludge flow rate to ozonation tank of 1.1 % of sewage inflow under 30 to 40 mgO3/gSS of ozone consumption and with sludge wasting ratio of 0.34% (one-fifth of a conventional A/O process). Throughout the operational experiment, a 60% reduction of excess sludge production was achieved in the new process. A biomass concentration of 2,300 mg/L was maintained, and the accumulation of inactive biomass was not observed. The new process was estimated to give a phosphorus recovery degree of more than 70% as an advantage of excess sludge reduction. The slight increase in effluent COD was observed, but the process performance was maintained at a satisfactory level. These facts demonstrate an effectiveness of the new process for excess sludge reduction as well as for phosphorus recovery.
AB - This paper shows the potential application of a new sewage treatment process with technologies of excess sludge reduction and phosphorus recovery. The process incorporated ozonation for excess sludge reduction and crystallisation process for phosphorus recovery to a conventional anaerobic/oxic (A/O) phosphorus removal process. A lab-scale continuous operation experiment was conducted with the ratio of sludge flow rate to ozonation tank of 1.1 % of sewage inflow under 30 to 40 mgO3/gSS of ozone consumption and with sludge wasting ratio of 0.34% (one-fifth of a conventional A/O process). Throughout the operational experiment, a 60% reduction of excess sludge production was achieved in the new process. A biomass concentration of 2,300 mg/L was maintained, and the accumulation of inactive biomass was not observed. The new process was estimated to give a phosphorus recovery degree of more than 70% as an advantage of excess sludge reduction. The slight increase in effluent COD was observed, but the process performance was maintained at a satisfactory level. These facts demonstrate an effectiveness of the new process for excess sludge reduction as well as for phosphorus recovery.
KW - Biological phosphorus removal
KW - Excess sludge reduction
KW - Phosphorus recovery
UR - http://www.scopus.com/inward/record.url?scp=33746547288&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33746547288&partnerID=8YFLogxK
U2 - 10.2166/wst.2006.424
DO - 10.2166/wst.2006.424
M3 - Article
C2 - 16889258
AN - SCOPUS:33746547288
VL - 53
SP - 217
EP - 227
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 12
ER -