Increase in efficiency of processing of drainage of sewage slouge to biogas
Biogas potential of sewage sludge from urban wastewater treatment plants in combination with wastes from poultry and sugar production has been studied. The studies were carried out using a laboratory biogas plant with batch reactors. The specific biogas yield of sewage sludge, from its mixture with sugar beet pulp and broiler chicken droppings amounted to 597.97 ± 154.7, 1089.12 ± 195.26 and 978.39 ± 166.32 ml / g of VS, respectively. The specific methane yield is 9.93 ± 3.16, 16.24 ± 8.16 and 44.75 ± 12.97 ml / g oVS, respectively. It has been established that it takes longer to adapt to the sewage sludge of the methane-forming microflora of the inoculum than to adapt to chicken manure or sugar beet pulp. The addition of these substrates increases the efficiency of processing sewage sludge into biogas, the best results are obtained when using chicken manure.