| 摘要 |
<p>PURPOSE:To treat an organic waste in high efficiency, to suppress the generation of methane and to prevent the release of a sulfide by treating a sludge as an insoluble material, by discharging a supernatant in a sedimentation tank as a treated water and by releasing a exhaust gas in a sulfur denitrification vessel to atmosphere after desulfurizing hydrogen sulfide. CONSTITUTION:The organic waste is squeezed by a squeezing device 3 and the solid material is removed as a squeezed lees 4 and a squeezed liquid is alkaline-hydrolyzed to hydrolyze an organic material in the squeezed liquid. The liquid hydrolyzed is neutralized with sulfuric acid in a neutralization vessel 8 and an organic material in the liquid is oxidized to carbon dioxide in a sulfate reducing reaction vessel 10 and sulfuric ion and sulfur are reduced. And denitralification in a sulfur denitrification vessel 12 and the nitration of ammonium ion are executed in a nitration vessel 16, the sludge of residual part of waste settled in a sedimentation tank 17 and the sludge of squeezed lees 4 and sludge in the sulfate reduction reaction vessel 10 are treated as the insoluble material in an excess sludge treating device 21, the supernatant in the sedimentation vessel 17 is discharged as the treated water and the exhaust gas in the sulfur denitrification vessel 12 is released to atmosphere after hydrogen sulfide in the exhaust gas is desulfurized in a desulfurization vessel 13.</p> |
