LO-CAT® Removes H2S From Biogas At Waste Water Treatment Plants

At the Hyperion Waste Water Treatment Plant in Los Angeles, digester gas H2S concentration had to be controlled so that SOx emissions from the on-site digester gas combustion could be kept within regulatory limits. With emissions under control, gas could be burned to generate steam for heat or electricity or sold to local utilities. This plant treats nearly 420 MGD, generating over 475 tons of raw sludge per day.

To eliminate the problems arising from plugging of the packed columns in the original Stretford unit, the unit was converted to a LO-CAT® unit with mobile bed absorbers. This retrofitted plant exceeds all requirements and produces a treated gas with a H2S content significantly below the required outlet level.

See Process Diagram for Hyperion Water Treatment Plant.

See Full Case History (pdf),