Hydrogen Sulfide Prediction

SWMMrs,

Is there an available software package that is used in conjunction with a hydraulic model to predict the location and severity of hydrogen sulfide release?

Thanks,

Noah Walker
3-Waters

ASCE Manual of Practice No. 69 provides the code for a program called SULFBAS that produces hydrogen sulfide generation rates for pipe reaches. A key input is flow, since the program is based on the Pomeroy-Parkhurst equation which uses hydraulic radius, wetted perimeter, non-wetted perimeter, and other parameters linked to how much depth of flow is in the pipe and the velocity of the flow. Sensitivity analysis is advised.

My company developed a database driven program that determined the sulfide generation in a whole system of pipes using the concepts of MOP 69. The program and implementation was detailed at a WEF conference in the mid-90s. The database was populated with flows from a hydraulic model.

Hydrogen sulfide release is a little trickier, as it deals with turbulence, drops, and high velocities -- very site specific things. A program called CORAL, Collection system Organic Release ALgorithm, by Drs. Corsi (sp?) and Melcer, was developed to estimate some of these releases, including that of H2S.

Best of luck,
Andy Lukas, P.E.
Brown and Caldwell