CONTINUOUS PIGGERY WASTEWATER TREATMENT WITH ANAEROBIC BAFFLED REACTOR (ABR) BY BIO-ACTIVATOR EFFECTIVE MICROORGANISMS (EM4)

Aims: This study was aimed to determine the efficiency and characteristics of the pig wastewater treatment using ABR with the addition of effective microorganism4 (EM4) as bio-activator during the startup process (R1) and without EM4 (R2). Methodology and results: Piggery wastewater is poured into ABR with 12 hours HRT (hydraulic retention time) and reduced to 6 hours after the concentration in ABR is stable. COD removal efficiency when 12 hours HRT reach 60% (R1), and 51% (R2). The results did not change significantly, when 6 hours HRT COD efficiency were 57.8% (R1) and 51.3% (R2). The biomass growth rate at R1 is faster than R2 with Food to Microorganism ratio (F/M) 0.4-0.89 (R1) and 0.68-1.38 (R2). The yield value of methane gas formation in the study showed a value of 0.25-0.28 L-CH4/g-COD removed. Conclusion, significance and impact study: Advanced wastewater treatment is needed to improve effluent’s quality for water reuse from piggery wastewater. The addition of EM4 can improve the COD efficiency removal and biomass growth.