Browse > Article
http://dx.doi.org/10.11001/jksww.2020.34.3.191

Comparison of infiltation rate for separate sewer system and combined sewer system in sewer maintenance areas  

Gu, Gwangmo (Department of Environmental Engineering, Daejeon University)
Chu, Shaoxiong (Department of Environmental Engineering, Daejeon University)
Lim, Bongsu (Department of Environmental Engineering, Daejeon University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.34, no.3, 2020 , pp. 191-200 More about this Journal
Abstract
This study is to improve the efficiency of BTL (Build Transfer Lease) project operation by comparing the infiltration rate based on the data of 5 years of infiltration of the separate sewer system and combined sewer system. In the survey site, the separate sewer system area consists of eight flowmeters in seven treatment basins, and the combined sewer system area consists of eight flowmeters in five treatment basins. The infillration rate was analyzed by night-time domestic flow evaluation method, and the average infiltration rates of the separate sewer system and combined sewer system were 13% and 16%, respectively. Combined sewer system was about 1.3 times higher than the separate sewer system. The average BOD of separate sewer system was 233 mg/L, which was about 2.4 times higher than the combined sewer system was 107 mg/L. In the comparison of the average pipe diameter-length infiltration of separate sewer system and combined sewer system, the separate sewer system and the combined sewer system were about 0.150 ㎥/d/mm/km and about 0.109 ㎥/d/mm/km, respectively. The floating population in mixed residential and commercial areas has been identified as the cause. Therefore, we propose a method to calculate the infiltration rate in consideration of the margin ratio in the area where the night active population is concentrated.
Keywords
Build transfer lease project; Combined sewer system; Separate sewer system; Night-time domestic flow evaluation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 An, D.H. and Kim, J.O. (2013). Analysis on effectiveness of sewer rehabilitation project and study on improvement of fixed flow meters, J. Wet. Res., 15(4), 461-469.   DOI
2 Chang, D.H., Han, I.S., Woo, B.H. and Hong, S.J. (2009). Analysis of correlation between defective number of sewer pipes and I/I(Infiltration/Inflow) volume, J. Korean Soc. Water and Wastewater, 23(3), 321-329.
3 Gu, G.M. and Lim, B.S. (2018). "An analysis of characteristics of Infiltration /Inflow (I/I) at combined sewer in large city", Proceedings of Korean Society of Environmental Engineers Domestic Conference, 14-16 Nobember, 2018, Gwangju, Korea, 519-520.
4 Gu, G.M., Chu, S.X. and Lim, B.S. (2019). Characteristics of Infiltration at Combined Sewer Area in Daejeon Metropolitan City, J. IIT(Daejeon Univ.), 30(1) 33-40.
5 Gu, G.M. (2020). Comparison of Infiltration Rate of Separate Sewer System and Combined Sewer System in Sewage Pipeline Maintenance Areas in Large City, Master's Thesis, Daejeon Univerity, 29-34.
6 Gu, J.E., Lee, H.S., Son, G.T., Lee, S.E. and Lee, S.H. (2011). Analysis of infiltration/inflow at dry and rainfall periods in separated sewer system of Nakdong River Basin, J. Korean Soc. Water Wastewater, 25(1), 75-84.
7 Jeong, Y.H. (2020). A study on Improvement of Management for Sewage Treatment Plant in Sewer Rehabilitation Project, Master's Thesis, Gyeongnam National University of Science and Technology, 32-33.
8 Kim, H.J. and Park, K.H. (2010). Statistical methods for the use of infiltration and inflow as performance index in sewer rehabilitation works, J. Korean Soc. Water Wastewater, 24(5), 617-628
9 Kim, J.O., Jeong, D.G. and An, D.H. (2014). A study on improvement of inflow/infiltration computation and application method in sewer rehabilitation project, J. Korean Soc. Water Wastewater, 28(1), 33-45.   DOI
10 Lee, T.J. (2014). A Study on Analysis of Effectiveness in BTL Sewer Rehabilitation, Master's Thesis, Kangwoon University.
11 Lim, Y.S., Son, B.C. and Choi, Y.Y. (2015). Classification expression sewer rehabilitation regional infiltration/inflow analysis, J. Korean Soc. Water Sci. Technol., 23(2), 67-79.   DOI
12 Ministry of Environment(MOE). (2009). Standard manual for the computation of sewage conducit infiltation & inflow.
13 Song, I.S., Kim, H.J., Lim, H.S. and Lee, S.K. (2004). Investigation of inflow and infiltration of combined and separated sewer system at Gwangju city, J. KTSWT, 12(1), 83-96.
14 Oh, J.I., Lee, J.H. and Jin, S.K. (2013). Queries for standard sewer infiltration/inflow assessment, J Korean Soc. Water Wastewater, 27(2), 285-290.