Methanogenic Activity and Repression on Hydrogen Sulfide Evolved During High Rate Thermophilic Methane Fermentation of Municipal Solid Waste.

Abstract

High rate thermophilic methane fermentation using a gas circulation-type reactor was explored for its potential to reduce the volume of and solid waste (MSW). Treatment without addition of make mineral beneficial nutrients use of municipal allowed for a maximum nutrients, TS volumetric loading a high TS volumetric rate of 1 g/l・d, the methanogenic rate of only loading rate 1 g/l・d. However, of 8 g/l・d was with achieved. addition of mineral At a TS loading activity with addition of mineral nutrients was 4-fold higher than corrinoids that were volumetric loading nearly 100%, and without mineral 0.12 μmol/g-VSS nutrients. and rate of 8 g/l・d. Carbon about 50% of the carbon The 0.07 concentrations μmol/g-VSS, recovery at each in raw waste was TS of coenzymes respectively, volumetric F430 and at a TS loading was converted to methane gas. The degradation efficiency of lipid, protein, holocellulose and lignin were 90.7%, 59.4%, 91.9% supplied biogas and 66.0%, respectively. To repress to the anaerobic reactor, by which the evolution of hydrogen sulfide, air was the concentration of hydrogen sulfide in was reduced nearly 100% when air at 7.5% of the amount of evolved biogas was used.