Topic : ☐ 대기환경 ☑ 수질환경  ☐ 실내환경 ☐ 산업보건 ☐ 환경독성 ☐ 환경위생 ☐ 건강영향 ☐ 노출 및 위해도평가

서울시 물재생센터의 회색 물발자국 평가

Grey Water Footprint Assessment in Wastewater Treatment Plants in Seoul, Korea

이진1, 이준연1, 최예덕1, 홍주희1, 이순희1, 안정희1, 강경화1, 이효진1, 한규문1, 이목영1, 정권1, 조경덕2

1서울시보건환경연구원, 2서울대학교 보건대학원 환경보건학과

(발표자 : wisegenie@seoul.go.kr)

Wastewater treatment plants (WWTPs) play an important role within the urban water cycle in protecting receiving waters from untreated discharges. However, WWTPs processes also affect the environment. The grey water footprint (GWF), defined as the volume of freshwater required to assimilate the load of pollutants discharged into water base on natural background concentration, is and indicator reflects the impact of pollution into water requirements. The GWF methodology in assessing the environmental impact and the benefits from WWTP discharge to a river is illustrated with four WWTPs in Seoul, Korea, using two scenarios: no treatment and current treatments. A reduction of the grey water footprint by 89.8-92.9% was achieved using current treatments, to fulfill the legal limits. These results indicate that when treating wastewater, there is a large decrease in the grey water footprint compared with no-treatment scenario.

Keywords: Grey water footprint, Wastewater treatment plant