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http://dx.doi.org/10.17663/JWR.2021.23.2.183

A Study on the Characteristics of Small-scale Sewage Treatment Plants in Mountain Area and Operation Plan for Winter Season  

Chae, Heejun (Department of Civil Engineering, Seoul National University of Science and Technology)
Lee, Jiwon (Department of Civil Engineering, Seoul National University of Science and Technology)
Gil, Kyungik (Department of Civil Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of Wetlands Research / v.23, no.2, 2021 , pp. 183-188 More about this Journal
Abstract
In the case of small-scale sewage treatment plants, it is reported that the amount of inflow fluctuates and it is difficult to operate the sewage treatment due to the inflow of unknown water due to the aging of sewage pipes. In particular, there are many overall operational problems due to the decrease in water temperature in winter. In this study, the operation status of small-scale sewage treatment facilities located in mountainous areas and water quality changes according to temperature were analyzed. It was found that the concentration of BOD, COD, and SS in effluent water was greatly changed depending on the temperature, and it was found that COD was particularly affected. Accordingly, the water level of the bioreactor was raised by 0.4m in order to temporarily apply measures to lower the water temperature in winter. As a result of comparing and analyzing the results when the bioreactor was covered and operated, a significant improvement effect occurred. In addition, a plan to improve the treatment efficiency of the bioreactor in winter is to extend the residence time of the bioreactor, a plan to expand the bioreactor specification, a new flow control tank and transport it to the outside, and an oxygen-free air diffuser to be used as an aerobic tank in case of an emergency in winter. The improvement plan was suggested. The results of this study are expected to be used as basic data for the operation plan of small-scale sewage treatment facilities in winter.
Keywords
Small-scale sewage treatment facility; winter season; bioreactor; flow control tank; diffuser;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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