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Evaluation of Swine Wastewater Pretreatment Using Anaerobic Filter

Anaerobic Filter에 의한 양돈폐수의 전처리 특성 평가

  • Received : 2015.07.01
  • Accepted : 2015.07.30
  • Published : 2015.07.31

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 $CH_4$ 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 $CaCO_3$ 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.

Keywords

Anaerobic Filter;Biogas;Swine Wastewater;OLR/HRT;C/N/P Ratio

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Cited by

  1. Evaluation of the Performance Parameters with a Semi-Continuously Fed and Mixed Anaerobic Reactor using Food Waste vol.12, pp.4, 2016, https://doi.org/10.7849/ksnre.2016.12.12.4.088

Acknowledgement

Supported by : 충남대학교