ITB-L15-10-126 - HYDROGEN SULFIDE SCRUBBER SYSTEM AT WPCF

Summary of Specifications:
The City of Greeley’s Water Pollution Control Facility (WPCF) is requesting bids to replace the current hydrogen sulfide (H2S) scrubber system that was installed in 1998. This unit was designed to remove H2S from the methane gas produced in the anaerobic digesters. H2S is a very acidic aggressive gas that corrodes carbon steel quickly and is removed to protect the plant’s boilers that utilize the digester gas. The existing scrubber was designed to remove 67 scfm of digester gas with a content of 1200 ppm H2S. Current digester gas production has increased by 100% since 1998 from 67 scfm to 140 scfm as well as the H2S strength increasing from 1200 ppm to 2000 ppm. The new scrubber system must have a continuous regeneration system that is guaranteed to remove 13 lbs. of H2S per cubic foot of media as compared to the typical 10.5 lbs. of removal. The new equipment is planned to be in operation when new boilers are installed in late 2016.