Impact of the temperature on the anaerobic digestion
Results of this study indicate that solar energy can be used for the digester heating and it can rise
the temperature in the winter season and increase the production rate of the biogas. The temperature
of the digester was daily monitoring along the study period of the plant operation. In order to observe
the effect of the solar system on the digester temperature and biogas production; the impact of the
solar system on the digester temperature and the rate of the biogas was observed in the winter
season which is from October to March, along these five months ambient temperatures and solar
radiation started to decrease; the solar system using in these five months in order to increase the
temperature of the digester and enhance the anaerobic process. The relation between the digester
temperature and the biogas production are shown in (Figure 3). Fluctuations in the temperature of
the digester were small at summer season (May-September), which being more fluctuated in winter
season (October-March).