| Treatment Chemical |
Benefits |
Limitations |
| Oxidizing Agents |
|
|
| Chlorine/Hypochlorite/Chlorine Dioxide |
Reacts very quickly Destroys organic odors |
May create chloroform and THMs. Excess may cause chlorine odors . Limited duration of control Non-specific to sulfides |
| Hydrogen Peroxide |
No harmful by-products Excess results in addition of DO in-line BOD reduction |
Handling procedures can be difficult. Efficiency decreases with increasing retention time. Organic odors may require bioremediation or catalysis. Non-specific to sulfides |
| Metal Salts |
|
|
| Ferric Chloride/Sulfate |
Effective for long duration control. Improves clarification process. Assists in phosphate removal |
Increase in sludge generation due to iron precipitates. Lowers pH; therefore, it may be neccesarry to add a pH modifier. Difficult to achieve low sulfide limits. Highly corrosive. Removes phosphate that is available as nutrients |
| Biomodifier |
|
|
| Nitrate |
No effect on sludge quantity. Effective for long duration control. Non-hazardous material |
Does not react with existing sulfide. Long contact time with maximum efficiency. Residual nitrate |
| Organic Scavenger Technology |
|
|
| Proprietary Formulation |
No effect on sludge quantity. Specific to sulfides and mercaptans. Non-hazardous material |
Does not stor the biological production of sulfide |
