Comprehensive Performance Evaluation of
Sewage Treatment Facility (STF)
Located in the Underground of Downtown Area
Choi Lang-Kyu
Department of Environment Engineering
Graduate School, Daejeon University
(Directed by Prof. Byung-Uk Bae, Dr.. P.E.)
Abstract
The S-sewage treatment facility(STF)...
Comprehensive Performance Evaluation of
Sewage Treatment Facility (STF)
Located in the Underground of Downtown Area
Choi Lang-Kyu
Department of Environment Engineering
Graduate School, Daejeon University
(Directed by Prof. Byung-Uk Bae, Dr.. P.E.)
Abstract
The S-sewage treatment facility(STF) in Y-city is an environment-friendly public facility that has community center, sports complex, art hall, and park on the ground, while all of sewage treatment equipments are constructed under the ground. In this study, comprehensive performance evaluation was conducted for the S-STF for more efficient operation and maintenance. For this purpose, all operating data were analyzed, and also water samples were taken from each unit process to examine the reliability of the data.
As a main treatment process, a 5-Stage BNR with a capacity of 110,000 m3/day is used for the S-STF. The effluent is discharged to the Han-river after being treated with filtration and disinfection process. The excess waste activated sludge produced from the above sewage process is sent to a centrifugal dehydrator. After that, all of the produced solid waste is incinerated.
The averaged flowrate of influent wastewater for 1 year(2012) was 105,033 ton/day, corresponding to 95.5% of design capacity. For the effluent stream, the averaged concentration of BOD, COD, SS, T-N, and T-P was 4.3, 11.1, 4.8, 7.480, and 0.359 mg/L, respectively. This result means that the concentration of effluent stream was less than the discharge limit.
Due to the rehabilitation of sewage pipeline, the concentration of influent wastewater increased higher than the designed value. The averaged concentration of BOD, COD, SS, T-N, and T-P for the influent wastewater was 235.3 (151.8 % of designed value), 143.8 (108.9 % of designed value), 258.9 (163.9 % of designed value), 55.916 (169.4 % of designed value), and 6.681 mg/L (139.2 % designed value), respectively. This result indicates that the S-STF is severely overloaded. In conclusion, in order to overcome the overloading problem, the enlargement of treatment capacity should be established based on the data analyzed in this study.
Comprehensive Performance Evaluation of
Sewage Treatment Facility (STF)
Located in the Underground of Downtown Area
Choi Lang-Kyu
Department of Environment Engineering
Graduate School, Daejeon University
(Directed by Prof. Byung-Uk Bae, Dr.. P.E.)
Abstract
The S-sewage treatment facility(STF) in Y-city is an environment-friendly public facility that has community center, sports complex, art hall, and park on the ground, while all of sewage treatment equipments are constructed under the ground. In this study, comprehensive performance evaluation was conducted for the S-STF for more efficient operation and maintenance. For this purpose, all operating data were analyzed, and also water samples were taken from each unit process to examine the reliability of the data.
As a main treatment process, a 5-Stage BNR with a capacity of 110,000 m3/day is used for the S-STF. The effluent is discharged to the Han-river after being treated with filtration and disinfection process. The excess waste activated sludge produced from the above sewage process is sent to a centrifugal dehydrator. After that, all of the produced solid waste is incinerated.
The averaged flowrate of influent wastewater for 1 year(2012) was 105,033 ton/day, corresponding to 95.5% of design capacity. For the effluent stream, the averaged concentration of BOD, COD, SS, T-N, and T-P was 4.3, 11.1, 4.8, 7.480, and 0.359 mg/L, respectively. This result means that the concentration of effluent stream was less than the discharge limit.
Due to the rehabilitation of sewage pipeline, the concentration of influent wastewater increased higher than the designed value. The averaged concentration of BOD, COD, SS, T-N, and T-P for the influent wastewater was 235.3 (151.8 % of designed value), 143.8 (108.9 % of designed value), 258.9 (163.9 % of designed value), 55.916 (169.4 % of designed value), and 6.681 mg/L (139.2 % designed value), respectively. This result indicates that the S-STF is severely overloaded. In conclusion, in order to overcome the overloading problem, the enlargement of treatment capacity should be established based on the data analyzed in this study.
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