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J Korean Soc Environ Eng > Volume 37(7); 2015 > Article
J Korean Soc Environ Eng 2015;37(7): 418-425. doi: https://doi.org/10.4491/KSEE.2015.37.7.418
Anaerobic Filter에 의한 양돈폐수의 전처리 특성 평가
강호, 문서연
충남대학교 환경공학과
Evaluation of Swine Wastewater Pretreatment Using Anaerobic Filter
Ho Kang, Seo-yeon Moon
Department of Environmental Engineering, Chungnam National University
Corresponding author  Ho Kang ,Tel: 042-821-6675, Fax: 042-821-5610, Email: hokang@cnu.ac.kr
Received: July 1, 2015;  Revised: July 27, 2015;  Accepted: July 30, 2015.  Published online: July 31, 2015.
ABSTRACT
Anaerobic Filters (AF) packed with porous ceramic floating media were operated at different operational conditions to identify the feasibility of the renewable bioenergy, methane production from swine wastewater and to verify the suitability of effluent from anaerobic filters for the subsequent biological nitrogen and phosphorus removal. Stepwise increase in organic loading rates (OLRs) or decrease in hydraulic retention times (HRTs) with influent TCOD concentration of 14,000 mg/L were utilized at mesophilic temperature. The maximum methane productivity of 1.74 volume of CH4 per volume of reactor per day (v/v-d) was achieved at an hydraulic retention time (HRT) of 0.5 day (OLR 28 g TVS/L-d). Based on the biogas production, the highest total volatile solids (TVS) removal efficiency of 63% was obtained at an HRT of 3 days (OLR 4.67 g TVS/L-d), however based on the result from the effluent total chemical oxygen demand (TCOD) analysis, the highest TCOD removal efficiency of 75% was achieved. The effluent alkalinity concentration over the range of 2,050~2,980 mg/L as CaCO3 at all operational conditions, could compensate the alkalinity destruction caused by nitrification. The effluent from the anaerobic filter operated under the HRT of 2 days showed the COD/TKN ratio of 15~35 and COD/TP ratio of 38~56. Therefore effluent C/N/P ratio is able to satisfy the optimum COD/TKN ratio of greater than 8.0 and COD/TP ratio of 33 for the subsequent biological nutrient removal.
Key Words: Anaerobic Filter, Biogas, Swine Wastewater, OLR/HRT, C/N/P Ratio
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