A waste management company approached MV Technologies for a solution to reduce H2S emissions of an anaerobic digester. The company had to comply with their air permit and warranty requirements of their engine manufacturer. The flow of the digester averages 150 cfm, with concentrations of H2S between 2,500 and 3,000 ppm.
MV Technologies supplied a single-vessel H2SPlus System with a 10’ diameter by 10’ tall vessel, designed to treat the hydrogen sulfide down to 100 ppm or less throughout the 170-day bed life of the media.
MV Technologies supplied a low-cost solution for H2S removal from a 350 SCFM biogas stream generated at this digester facility. The anticipated H2S levels are 200-2,000 ppm, with occasional spikes to 5,000 ppm. The operator was spending several thousand dollars per week on an activated carbon H2S scrubber and additional costs associated with the frequent replacement of the activated carbon.
The single vessel H2SPlus System is designed to deliver less than 25 ppm outlet H2S, regardless of fluctuating inlet H2S concentrations. The 12’ diameter x 11’-6” tall vessel utilizing 1,050 ft3 of enhanced iron sponge media is designed to last at least six-months before media replacement is required. Due to high cost of the activated carbon the operator considered shutting down the power plant prior to the installation of the H2SPlus System. The MV system allowed the power generation portion of the project to return to profitability.