Process and apparatus for anaerobic treatment of sulfur...

Details Process and apparatus for anaerobic treatment of sulfur... Process and apparatus for anaerobic treatment of sulfur...

2004-07-15

2008-09-23

Prince, Fred (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S631000, C210S916000, C423S244060

Reexamination Certificate

active

07427357

ABSTRACT:
An object of the present invention is to provide a process for a high-performance upflow anaerobic sludge treatment (methane fermentation treatment) targeting an organic wastewater containing an inorganic sulfur compound and an apparatus therefor. The invention relates to a process for methane fermentation treatment of an organic wastewater containing a sulfur compound, which includes: detecting a concentration of hydrogen sulfide in a biogas generated from a step of methane fermentation treatment; and, conducting a control of subjecting the organic wastewater to a desulfurization treatment operation in the case that the concentration of hydrogen sulfide in the biogas exceeds a predetermined value, and to an apparatus therefor. It is preferred that the predetermined value of the concentration of hydrogen sulfide is from 1 to 4%, preferably from 1% to 2%, and the desulfurization treatment operation comprises adding a desulfurizing agent containing an iron ion so that a molar ratio of the iron ion to sulfur is from 0.05 to 1.

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