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발효·건조 공정을 이용한 하수처리장 협잡물 처리 실증화 기술개발 연구
서정식 ( Jeong-sig Seo ),윤종호 ( Jong-ho Youn ),반재형 ( Jea-hyung Ban ),이명오 ( Myoung-oh Lee ) 한국폐기물자원순환학회 2022 한국폐기물자원순환학회지 Vol.39 No.5
In this study, a demonstration technology was developed for the treatment of sewage impurities by a fermentation and drying process. To treat the sewage impurities, fermentation and drying devices with a daily processing capacity of 100 kg and 300 kg, respectively, were installed at a public wastewater treatment facility. It was found that the weight loss rate and average water content of the fermentation dried residues from the sewage impurities ranged from 79-84% and 20-25%, respectively. The residues satisfied the quality standards of solid refuse fuel, meaning they could be reused as auxiliary fuel for coal-fired electrical power plants or cement factories. The fermentation and drying process was much more economical and environmentally friendly than the incineration process mainly used to treat sewage impurities. Compared with the incineration process, the fermentation and drying process was about 78% less expensive.