Hazardous Peak Concentrations of Hydrogen Sulfide Gas Related to the Sewage Purification Process
| Autor: | Wijnand Eduard, Bjørn Tvedt, Per Søstrand, Erik Bye, Kari Kulvik Heldal |
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| Rok vydání: | 2000 |
| Předmět: |
Safety Management
Waste management Sewage business.industry Hydrogen sulfide Extraction (chemistry) Public Health Environmental and Occupational Health Air Pollutants Occupational Remedial action chemistry.chemical_compound chemistry Waste Management Hazardous waste Environmental chemistry Occupational Exposure Sewage sludge treatment Humans Sewage treatment Hydrogen Sulfide business Anaerobic exercise |
| Zdroj: | AIHAJ. 61:107-110 |
| ISSN: | 0002-8894 |
| DOI: | 10.1202/0002-8894(2000)061<0107:hpcohs>2.0.co;2 |
| Popis: | The concentration of hydrogen sulfide in the atmosphere of a sewage purification plant in Norway was studied. Continuous measurements over several 3-week periods showed that the concentrations generally were lower than 2 ppm, but peak concentrations over 100 ppm were discovered. Rapid onset and decline characterized these peak concentrations, which occurred at regular intervals. Through evaluation of the time pattern of these peaks compared with plant operations, a specific process was identified as the likely causative factor of the spikes. Through simple remedial actions the hydrogen sulfide concentration associated with this activity was reduced from above 100 ppm to less than 2 ppm. Olfactory fatigue to hydrogen sulfide and strong offensive odors from other compounds in the sewage makes smell ineffective for signaling high concentrations. Peak concentrations may therefore pass unnoticed unless detected with continuous measuring equipment. The risk for exposure may be reduced by enclosing processes and through the use of spot extraction ventilation in areas with compacted anaerobic waste material. |
| Databáze: | OpenAIRE |
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