This research studied the ratio of waste water and sludge in the process of starting a biogas reactor. The initial concentration of COD begin with the efficiency of biogas production. And kinetics of the biogas production (start-up) in the industry by means of a miniature (scale down) using the reactor has a volume of 1 liter were divided into three during the trial by the trial 1 trial. batch reactor system The study will compare results in terms of the ratio between wastewater and sludge. And in the factors affecting the biogas anaerobic condition. This experiment three series of experiments conducted in three replications for each experiment contain a ratio of waste water to precipitate 1: 2, 1: 3 and 1: 4 for a period on trial during the first 10 days thereafter. During the trial, the second trial will be a test of the trial period, the first by walking the reactor continuously. A comparative study on the entry of waste into the system as the ratio of water to precipitate 1: 2, 1: 3 and 1: 4 in a continuous system will consist of three series of experiments conducted in three replications. Enter the waste continuously into the reactor at the rate of inflow system was 66.67 ml / day (HRT = 15) with a time trial during the second 20 days later conducted a third by the comparative study. When the concentration of sewage and sludge ratio. This system, reactor continuously includes three series of experiments conducted three repeated by the ratio of water to precipitate 1: 2, 1: 3 and 1: 4 in the flow rate into the system is equal to 66.67 ml / day (. HRT = 15) and a time trial during the third 20 days, so all three of the tests will take 50 days to try to determine the amount of gas formed by irrigated daily with. Water samples were analyzed for parameters COD, VFA, ALK, SS, VSS, MLSS, MLVSS and pH to the parameters analyzed pursue the possibilities of the system and to determine the appropriate ratio for a trial period during the trial. various
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