Use of a vortex layer apparatus for improving the efficiency of methane digestion of wastewater sludge

Summary

Improving the efficiency of anaerobic digestion of wastewater sludge including methane yield and the depth of mineralization of organic matter increasing is an urgent task. As part of the study the effect of wastewater sludge pre-treatment in an apparatus with vortex layer of ferromagnetic particles on the efficiency and kinetic parameters of the subsequent anaerobic digestion of the sludge under thermophilic conditions was investigated. The analysis of the particle size distribution of wastewater sludge before and after treatment in the vortex layer apparatus was carried out. The technological parameters of sludge processing in the vortex layer apparatus provided for increasing methane yield by 3%, degree of decomposition of organic matter by 8–9%, and hydrolysis constants by 4.7%. To estimate the kinetic parameters of the process the modified Gompertz equation and the first-order equation were used.

Key words

wastewater sludges , grainsize composition , apparatus with vortex layer of ferromagnetic particles , methanogenic digestion , kinetic parameters , modified Gompertz equation , first-order equation