Biogas production of tomato sauce wastewater by batch anaerobic digestion

The wastewater of tomato sauce production is a degradable and contains high organic compounds. Treatment for high content organic compounds is effectively treated through anaerobic treatment. High organic content is also a potential to produce biogas. The ultimate point of this research is to evaluate the influence of mass of activated sludge and the concentration of organic compounds (COD) to the production of biogas. The research is conducted in batch process in 2 L reactor, MLSS concentration was 12,000 mg/L, room temperature, atmospheric pressure, and pH of 7-7.5. Research variables were the volume of active sludge (40%-80% of the reactor), the concentration of synthetic wastewater (5,000 – 17,000 mg/L) and the response was the volume of biogas. The obtained result indicated that the highest biogas production achieved when volume of activated sludge applied of 80%, the higher the activated sludge the higher the content of microbes, hence it was also required high organic compound. While the effect of COD’s wastewater concentration on biogas production, the higher the COD concentration will significantly increase the biogas production.