Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Treatment of palm oil mill effluent using 2 stage reactors combined anaerobic hybrid reactor and anaerobic attached growth reactor

혼합공정과 부착성장공정을 조합한 2단계 혐기 조합공정에서 palm oil mill effluent의 처리

  • Shin, Chang-Ha (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Son, Sung-Min (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Jeong, Joo-Young (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Park, Joo-Yang (Department of Civil and Environmental Engineering, Hanyang University)
  • 신창하 (한양대학교 건설환경공학과) ;
  • 손성민 (한양대학교 건설환경공학과) ;
  • 정주영 (한양대학교 건설환경공학과) ;
  • 박주양 (한양대학교 건설환경공학과)
  • Received : 2012.10.27
  • Accepted : 2013.02.01
  • Published : 2013.02.15
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Abstract

Present study was conducted to evaluate the performance of Anaerobic Hybrid Reactor (AHR) combined with two types of anaerobic attached growth reactors at mesophilic temperature ($37^{\circ}C$). The reactor was operated at the influent substrate condition of 19,400 mg/L soluble chemical oxygen demand (sCOD). The organic loading rate (OLR) and flow rate were varied in the range of $9.5{\sim}22.5kg/m^3$. day and 10.6 ~ 26.0 L/day respectively since start-up was done. The COD removal efficiency of 93 % was measured at the OLR of $14kg/m^3$. day in AHR. However a reduction in removal efficiency to as low as 85 % could have been related to a combined effect of high concentration suspended solids (SS) concentration over 3,800 mg/L. On the other hand the total COD removal efficiencies were measured to be 96.3 % and 96.2 % for AHR+APF and AHR+ADF respectively. The pH of the POME was adjusted to neutral range by using sodium bicarbonate at the initial stages of the reactor feed, later stages pH adjustment was not required as the pH was maintained in the desired neutral range due to self-buffering capacity of the reactor. The reactor proved to be economically acceptable and operationally stable. The biogas was measured to have $CH_4$ and $CO_2$ with a ratio of 35:65, and methane gas production rate was estimated to be $0.17{\sim}10.269L\;CH_4/g\;COD_{removed}$.

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References

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