Hydrogen sulfide removal and elemental sulfur
Hydrogen sulfide removal and elemental sulfur
(OP)
My client has water supply wells in limestone with H2S average of 2.3 mg/l. The average iron is 227 ug/l and ranges from 170 to 1730 ug/l, with the highest iron associated with highest H2S. I suspect iron bacteria/sulfate reducers in the well and formation. They are chlorinating directly after the well and precipitating elemental sulfur. Can the sulfur be filtered by cartridge filtration, or does it need special media? pH of the raw water is about 8.2, with a mean LSI of negative 0.24. I am going to use UV for the primary disinfectant and NaOCl for residual. The UV needs a NSF65 filter, so I was hoping to take out the S there, but am not sure of mass of S generated and what sizes particulate could be?
Any ideas woul be appreciated!
Thanks
Any ideas woul be appreciated!
Thanks





RE: Hydrogen sulfide removal and elemental sulfur
RE: Hydrogen sulfide removal and elemental sulfur
Majosa
RE: Hydrogen sulfide removal and elemental sulfur
RE: Hydrogen sulfide removal and elemental sulfur
The resulting oxidized sulfur particles after the chlorination may be colloidal. So I will concur with GarySCWSVI that a filtration process like a multi-media filter (sand, anthracite and garnet) preceded by coagulation using alum or a polymer is the recommended treatment approach.
Removal of hydrogen sulfide by aeration is not typically successful unless the pH is acidic or the hydrogen sulfide content is minimal. Such waters are rare. Sulfur waters tend to have significant quantities of alkalinity. At a pH of 8.2, only about 5% of the total sulfide is present as hydrogen sulfide. The rest is present as an alkaline sulfide.