흡수성 Biofilter 를 이용한 농촌 소규모 오수처리 시설의 성능 = Originals : Performance for a small on - site wastewater treatment system using the absorbent biofilter in rural areas

다국어 초록 (Multilingual Abstract)

The feasibility of an absorbent biofilter system was examined for rural wastewater treatment. Hydraulic loading rates varied from 50 to 250 ㎝/day. Effluent of the septic tank was fed into the absorbent biofilter, and small ventilation fan was provided to supply air at the rate of 250 L/min to aerate the biofilter. The biofilter system demonstrated high removal rates for BOD_5 and TSS at the loading rate of 150 ㎝/day, generally meeting the Korean effluent water quality standard of 20 ㎎/L applicable to both. The nutrient removal was less satisfactory than the results of BOD_5 and TSS, but it was within the expected range of biological treatment processes. Considering the abnormally high influent concentration of nutrients during the experiment, better performance results could have been obtained if ordinary domestic wastewater was used. The system performance was not significantly affected by the hydraulic loading up to 150 ㎝/day, which is far more than the loading limit of the sand filter systems. Maintenance requirement was minimal, and no problems with noise, odor, flies or sludge arose. Since the biofilter system can be operated at a distance, operation in remote rural area and multi-system connected to one control office might be advantageous to the rural area. Overall, considering the cost-effectiveness, stable performance, and minimum maintenance, the biofilter system was thought to be a competitive alternative to treat wastewater in Korean rural communities.