Abatement of hydrogen sulfide gas from wastewater treatment plant 2

[HAPM]

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?

 

[ischgl99]

Magnesium Hydroxide will reduce H2S levels in sewage and has the added benefit of aiding sludge settling in clarifiers and digestors. Much better and cheaper then using hazzardous chemicals. Mike Bensema

http://www.dutchmenservices.com

 

[akbar4]

Any comment on the ferric Chloride injection into the anaerobic digestor for H2S control. Can somebody refer to site or excel spreadsheet for calculating dosage required. We have a scenario of 800 - 1200 ppm in 35000 m3/d total gas produced.

 

[AtulBhalla]

Faced with the problem of high gas cleaning (H2S removal)costs, resulting in high power generation costs using gas engines, we evaluated some 26 different systems. Finally we narrowed down to 4 systems with the potential for low gas cleaning costs.
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

 

[dfman]

Thanks to Stanier for the referral. I am from CleanTeQ in Melbourne, Australia who manufacture compact BioFilter systems for many industries, including wastewater treatmment.

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

 

[MAJOSA]

Dear All, check out

http://www.zeolife.co.uk

, they are manufacturing bespoke H2S Filters using Natural Zeolite,
markbaty@euremica.com