Abatement of hydrogen sulfide gas from wastewater treatment plant
Abatement of hydrogen sulfide gas from wastewater treatment plant
(OP)
I am investigating the best method to abate hydrogen sulfide at a wastewater plant. We are looking to install a Biofilter. The Biofilter advantage is that it does not require any hazardous chemicals to operate. We used it sucessfully at one of our lift stations, however it does cost more up front. Does anyone have experiences with H2S treatment with the Biofilter or other technologies?





RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Our solution to treat the gas is to use activated carbon. essentially, the sewer vent passes through a "dustbin" (or garbage can for my US cousins) filled with IVP-type activated carbon. This is able to remove 98% of H2S at a relative humidity of 100% with a flow of 0.45 cubic metres per second. The carbon has a finite lifespan but replacement is simple. You lift the lid off the bin, hoover out the used up carbon and replace it with fresh carbon.
Regards
Andy Machon
Andy@machona.freeserve.co.uk
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Can you tell me what's the approximate changeout for the carbon unit and the material cost?
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Sorry for delay in replying, my 10 year old son inverted a cup of tea into the keyboard!! It has taken me a few days to replace the keys.
I will need to consult my data at the office but I think the prices are affected locally so you would get a better handle on the prie by approaching a carbon supplier close to you. For the flows we have I believe that the 1.5m diameter, 2m high nbin will last about one year on our contract. I will try to get the prices for tomorrow.
Andy Machon
Andy@machona.freeserve.co.uk
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
OK, The units we have installed are 2.22m diameter by 1.765m high and look like black polyester/polypropylene trash cans with a 250mm diameter inlet and outlet.
From our suppliers literature:- The unit can purify air streams of up to 1500 cubic metres per hour by activated carbon adsorption when using IVP carbon. The pressure drop to acieve this is 3000 Pascals. There are 510 kg of carbon pellets in the unit which can remove up to 60% of its own weight in pollutants.
The rate of carbon replacement is entirely dependant on the amount of polluted gas you put through the unit (but you could work this backwards from 60% of 510kg and relate this to your polluted gas H2S content to get a rough idea I suppose).
Your carbon supplier should be able to visit site and test the carbon you have to determine what life it has left.
A new unit of this size is about £5000, but I don't have the figures for replacement carbon
Hope this helps
Regards
Andy Machon
Andy@machona.freeserve.co.uk
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Key issue is to cover the unit to prevent drenching by rain water but provide sprays so you can control moisture. Apart from that the costs to run are minimal once the right mix of soil is establish.
For smaller sysytems Cleanteq in Melbourne manufature containorised units that are fully equipped. Useful for small towns.
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
This typically would encompass dehumidification, dust removal, H2S reduction, Siloxane removal, pressure management and temperature management.
Some engine suppliers don't necessarily make this obvious as it is not their core business to provide the technology or expertise in this area and they are happy to rebuild engines and sell more parts.
Feel free to contact me if you want to know more.
email warwick.cutfield@meritec.org
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Mike Bensema
www.dutchmenservices.com
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
We have now tried out one system which removes H2S down to well below 100ppmv from the biogas generated from distillery spent wash at a cost of around 0.5UScent/m3 of gas cleaned....considering all costs (fixed, operating, financing, etc). But I am wondering if the ammonia, siloxanes etc will change this scenario if we try biogas from other sources.........can anyone advise the level of and impact of (biogas) ammonia and siloxanes, etc on equipment?........and to what level removal of these is required?
Thanks all.
atulbhalla46@hotmail.com
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
Point sources treated include manholes on rising mains, pump stations, inlet works, sludge digesters etc.
Generally BioFilters are used individually to treat H2S levels up to 30ppm. Above this level you would probably combine them with other technologies - Caustic Scrubber/BioFilter or BioFilter/Activated Carbon systems are variations on this theme to treat variable emissions.
BioTrickling Filters are also now being developed to treat highly variable H2S emissions up to 500ppm. BioFilters or Activated Carbon may then be used to polish emissions.
Hope this information is useful.
ctairman
info@cleanteq.com
RE: Abatement of hydrogen sulfide gas from wastewater treatment plant
markbaty@euremica.com