Performance Evaluation of Single-Stage Reactor and Two-Stage Reactor in Anaerobic Process to Treat Leachate Laily Isna Ramadhani, Alifa Dewi Kirana, Ghinaa Annisa Khairani, Herawati Budiastuti, Keryanti, Dhyna Analyes Trirahayu
Politeknik Negeri Bandung
Abstract
Leachate is a liquid that permeate through landfills, if not managed properly can contamination to the environtment. The anaerobic method was choosen because it can decompose waste with high organic content and can form optimal biogas. To optimize the decomposition of organic content and produce biogas (methane gas), two-stage anaerobic processes are carried out by acidogenesis (acidification) and methanogenesis processes in different reactor. The purpose of this research is to evaluate the performamce of single-stage and two-stage reactors to reduce the COD content of waste leachate and determine the volume of biogas. The parameters of this research are Chemical Oxygen Demand (COD, Mixed Liquor Volatile Suspended Solid (MLVSS), and Cumulatibe Biogas Volume. In addition, the fixed parameter is pH, because pH greatly affects the anaerobic process. The acidogen reactors is set at pH in range of 4 - 5, the methanogen reactor is set at pH in the range of 6,4 - 7, and the single-stage reactor is set at pH in the range of 6 - 8. From the result of this research, it was found that the COD reduction efficiency in the acidogen reactor was 75% with a COD concentration of 1200 mg/L, the methanogen reactor was 33,3% with a COD concentration of 800 mg/L, dan the single-stage reactor was 83,3% with COD concentration of 800 mg/L. For cumulative volume of biogas, the acidogenesis reactor produce 0,104 L, the methanogenesis reactor produce 0,169 L, and the single-stage reactor produced 0,336 L. The performance of the single-stage reactor is better than the two-stage reactor in reducing COD concentration and in producing biogas volume.
Keywords: Anaerobic, Biogas, Chemical Oxygen Demand (COD), Two Stage, Leachate.
