Question of the Day: Hydrogen Sulfite Formation

Question

How is hydrogen sulfide formation controlled in wastewater treatment?

James Stewart · Answer

inconsistent nomenclature of the moiety of concern.  Are you talking about sulfite (really?) or sulfide (far more likely in a nasty environment, bad water, or next door to sulfide containing gas emissions.

Waymon Hofheins · Answer

Aerobic digestion or anaerobic digestion?   Big difference

Tonya Chandler · Answer

Hydrogen sulfide is caused by SRBs ... this is sulfate reducing bacteria.  These bacteria thrive in anaerobic environments.  They do not start out this way, but instead start out as SOBs, sulfate oxidizing bacteria which thrive in aerobic and anoxic environments.  They go through a metabolic change when there is no oxygen or nitrogen left, they make the change to anaerobic to survive.  Oxidation offers some of the most effective ways to control H2S.  Ozone, Oxygen  or Hydrogen Perioxide are very effective in controlling SRBs.  By killing the bacteria, you reduce the corrosion in the system being caused by part of the SRB metabolic process.    Calcium Nitrate can be used as well, feeding the SOBs to keep them from going to the SRB state.  Irons salts  and Lyming are other potential solution but can add solids to you system.

James Stewart · Answer

H2S is only controlled in certain areas of the plant, and will be higher in other areas.
It is controlled by a system with good, constant flow, not in upset, plenty of aeration in the aerobic digester areas, and by steadfast prayers and concerns of the operators.
H2S is responsible for most of the corrosion in a WWTP where exposed copper wiring (not sealed in silicone rubber) can corrode away in only a few days.
This gas is very treacherous, because if you cannot smell it (after perhaps you did smell it), you are in extreme danger of unconsciousness and death.

MUHAMMAD ILYAS KHAN · Answer

I have noticed the phenomena in Gas Fields where  H2s is vented in the atmosphere after Gas Purification. When the wind blows towards the Gas Purification Plants. The atmospheric H2S affects the cooling tower water where its Ph is reduced and water goes towards the acidic zone. 
Solution: H2So4 dosing is stopped to control Ph of CT.

Question of the Day: Hydrogen Sulfite Formation

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