Hydrogen Sulfide Removal
ADI introduces a new hydrogen sulfide gas stripping process
ADI has developed a new process for removal of hydrogen sulfide (H2S) from gas streams. Hydrogen sulfide is a common component in wastewater treatment plant off-gases (e.g. biogas) and waste gases from certain industrial processes. It is highly toxic and odorous, therefore its release to the atmosphere is regulated.
Hydrogen sulfide is highly corrosive, which can result in costly damage to equipment and piping systems used in biogas handling.
The simplest means of dealing with hydrogen sulfide removal is to burn the biogas in a flare. Unfortunately, this achieves 95% conversion to non-odorous sulfur dioxide (SO2), which typically is not sufficient to meet stringent air quality requirements.
Research completed by ADI has determined our patented SULFA-BIND process will efficiently and cost effectively remove hydrogen sulfide from biogas. A bench-scale version of a SULFA-BIND™ filter was able to treat gas with a hydrogen sulfide concentration as high as 30,000 ppm, reducing it to less than 1 ppm. An on-site pilot-scale filter was able to reduce hydrogen sulfide from 60 - 100 ppm down to less than 0.2 ppm on a digester gas at a wastewater treatment plant.
Hydrogen sulfide saturated SULFA-BIND ™ was also subjected to leachate testing, using both the Canadian and US protocols with the results considered non-hazardous waste.
Based on the performance evaluation and economic comparison with existing technologies, hydrogen sulfide removal using SULFA-BIND filter media is a practical, viable option.
SULFA-BIND consists of an inorganic, natural material, calcined to increase hardness, porosity and surface area and coated with iron oxide. Used in fixed-bed adsorber vessels, pressure loss is very low (inches of w.c.).
ADI has received a US patent for its SULFA-BIND adsorption process for removal of hydrogen sulfide in gas and air streams.
SULFA-BIND is proven to reduce hydrogen sulfide in biogas by up to 99.98%
It can handle hydrogen sulfide removal up to 30,000 ppm
It reduces hydrogen sulfide to non-detectable levels (0.2 ppm)
There is a reduction in 60 seconds or less of contact time
SULFA-BIND can be regenerated and residuals are non-hazardous
Up to 500 mg H2S adsorbed per gram of media.