자연기반해법을 이용한 수처리기술의 경제적 타당성 분석에 관한 연구

초록

This paper introduces a ‘Nature based Solution’ that improves water quality and stores carbon by installing simple facilities, and presents an economic feasibility analysis method. Water quality improvement benefit was calculated by applying the replacement cost approach to sewage treatment facilities. The carbon reduction benefit was calculated by multiplying the sum of the amount of carbon avoided during the pollutant treatment process of the sewage treatment facility and the amount of carbon absorbed during the photosynthesis of poplar by the trading price of carbon credits. The BOD treatment amount of NbS for 20 years was analyzed to be 141.35 kg and the carbon reduction amount was 89.9 CO2 ton. As of 2021, the benefit/cost ratio was 1.231, and the net present value was KRW 11.53 million. If water treatment technology using NbS is applied instead of a small-scale village sewage treatment facility, in addition to water quality improvement and carbon reduction at a low cost, energy saving, landscape improvement, odor reduction, and visual appearance of disgusting facilities Various effects such as relaxation can be obtained.

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