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전용우(Yong-Woo Jeon),유영섭(Youngseob Yu),윤영만(Young-Man Yoon) 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
With the improvement of living standards, the total amount of domestic organic waste resources generated has increased by 14.7% over the past 10 years. Although amount of biogas production has more than doubled over the past 10 years, energy conversion is still insufficient at 5.7% of the total amount of organic waste generated. As of 2021, 110 biogas plants of organic waste are in operation in Korea, and the government is continuously promoting the expansion of biogas plants. Most of the biogas plants are public facilities, and in terms of activation of the biogas industry, expansion of private facilities is required. In this study, the current status of the domestic biogas industry was analyzed and economic aspects including REC were reviewed to vitalize the domestic biogas industry. In addition, the biogas activation system of foreign countries such as Germany was reviewed, technical and institutional problems and obstacles of the domestic biogas industry were identified, and activation plans were presented.
Pilot-scale Study on Nitrogen Removal of Effluent from Biogas Plant
유성인(Yoo, Sungin),유영섭(Yu, Youngseob),이용세(Lee, Yongsei),박현수(Park, Hyunsu),유희찬(Yoo, Heechan) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.11
A rotating activated bacillus contactor (RABC) process with a series of aerobic reactors was tested in pilot scale to treat digested liquid from an anaerobic digester treating swine wastewater and sewage sludge. The influent (digested liquid) for the RABC process showed C/N ratios less than 2 as a typical feature of effluent from anaerobic digesters. The pilot process, which consists of three 3 RABC reactors, four aerobic tanks and a sedimentation tank, was operated for 210 days with a hydraulic retention time of 20 days without pH and temperature control. Since the Bacillus-enriched aerobic reactors shows high efficiencies of nitrogen removal at low DO levels less than 1.0 mg/L, they were operated at reduced aeration intensities. With relatively low concentrations of organics in comparison with nitrogen concentrations, the RABC process tested in this study showed stable and high nitrogen and organics removal efficiencies over 80%. The nitrogen removal process tested in this study was proven to be an effective and operation-cost saving (lower aeration) method to remove nitrogen without adding external carbon sources to meet the optimum C/N ratio.