Biogas Production Experiment

5.2.1. Results and discussions of 2nd experiment. (Co-digestion of water Hyacinth with cow-dung). The generation of the biogas from the batch reactor is measured daily with the help of a water displacement method. The biogas production for a period of 32 days was calculated. The initiation of the biogas production started after 48 hrs from the start of experiment. During first few days the gas productions was low and remain linear for a few days .The gas production was highest at the 18th days measuring up to 1.17 L. In these experiment about 2.5 Kg of water hyacinth juice was mixed with 2.5 Kg of cow dung, and the rest are mixed with water to make a volume of

The biogas gas production was measured using a 1L bottle and the biogas production was measured at different interval of time. The biogas production was linear from the starting point of time and then the production then the growth rate was in an exponential manner reaches its peak rate at 17th days of experiment. The total gas production noted were the addition of gas at different interval of time. The gas production rate was declined thoroughly over time. The experiment was performed in the month of Oct, performed with a wide range of temperature. The total gas production over the period of time was 19.86 L. The average gas production was about

The pH reduces abruptly from the initial day and comes to a lower value at a 6.2 at the 9th day which denotes the acidogenic phase of the system. The Ph value started to increase from the 10th day and the pH at the days of highest gad production was 7.21 at the 18th day. The biogas gas production starts to increase rapidly from 13th day to 18th day indicating the methanogenic phase. The pH then remain more or less same and tends to higher value at the last few days of experiment. The pH of the digested slurry at the last days of reading is found to be