The Research On The Anaerobic Co-digestion Of The Biomass And Landfill Leachate

The organic fraction of municipal solid waste (OFMSW) is the very important composition of biomass. And with more and more attention of biomass energy, the biomass used for anaerobic digestion is conforming to the principles of waste treatment. It is a good choice of the problems of environment and energy. But it is restrained easily in anaerobic digestion. At the same time, the pH value of landfill leachate is more than 7, and the concentration of its ammonia is higher, it is better for the restrain.In this paper, the anaerobic digestion is used for disposing OFMSW and landfill leachate. By the experiment, we try to study the technology more deeply, and the possibility of improving the biodegradability of landfill leachate. The facilities of anaerobic digestion are simple. And the solid phase is food waste, fruit waste and the mixture of the first two matter as well as 1:1. The liquid phase are water, landfill leachate and biogas slurry from last experiment. In the conditions of 35 degrees and the way of batch, it is made a study of the quantities of the biogas by the reactor, and the change of COD, BOD, pH and NH3-N.The experimental result shows that it is very advantage for the experiment, when the biomass is mixed with landfill leachate. It can enhance the activity of anaerobe. The gas production rate, the total gas production and the proportion of methane are all larger than those of the other facilitate. At the same times, after the experiment, the biodegradability of landfill leachate is raised greatly, and the main ingredient is organic acid. All of these experiment, food waste with landfill leachate got the biggest day-gas production firstly; the total gas production of fruit waste with landfill leachate is 30801ml, it is the most, and the biggest proportion of methane is 64.37%; whether landfill leachate is added to the mixture or not, they just have little difference between each other.