Predicting Hydrogen Sulfide Formation

Bentley's Dr. Tom Walski explains the problems faced with hydrogen sulfide formation in collection systems and how to model this in SewerGEMS or CivilStorm.
Topics covered:
- H2S chemistry and issues in wastewater collection systems
- Producing average concentration runs
- Displaying H2S result maps of the network
- Comparing H2S formation according to various conditions such as temperature
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[@user-ei3th9vy9p]

Can I simulate the manhole with odour control to know the percentage of h2s in the network after controlling it with the odour control?

[@bentleyopenflows]

Are you referring to the user of a device like the one seen here? - manholeodoreliminator.com/
If so, this appears to only filter the odors and would not impact the H2S inside the system. The calculated H2S in the OpenFlows sewer products represents the H2S concentration in the aqueous phase. The amount that escapes to the gas phase (and any interaction with odor control) depends on the turbulence, and various coefficients in Henry’s Law and is outside of scope. See more here: bentleysystems.service-now.com/community?id=kb_article&sysparm_article=KB0013632

[@BeerZerkeraidean]

Does h2s form in septic lift pumps in houses ?

[@bentleyopenflows]

Yes, H2S can form depending on the temperature and the detention time. The odor will tell you if that is occurring.