Investigation of cases death from fermented Biogas at skim crepe rubber factory, Phangla subdistrict, Sadoa district, Songkhla on August 13-16, 2019

Abstract

The objective of this study was to describe the epidemiology and find measures to prevent injury and death from confined space work.  Data were collected using interview data such as death, injury data, gas measurement results and survey environment. The results showed that five persons were affected at the skim crepe rubber factory. Four persons died, and one person was injured. Caused by the construction of a waste water treatment system with a size of 1.5 m x 1.5 m x 1.9 m (wide x length x depth). Gas measurement result at a depth of 30 centimeters from the top of wastewater treatment pond. The results revealed that the gas contained 21% oxygen (within the normal range) and 18 ppm hydrogen sulfide gas (H2S) (the content was higher than the standard). Toxic gases such as carbon monoxide, nitrogen dioxide and Nox were not detected. Moreover, Sulfuric acid (H2SO4) was used for coagulating latex. In conclusion, the cause of death may be due to methane, carbon dioxide, hydrogen sulfide and hydrogen gas from wastewater treatment pond. Unconsciousness or death could result within minutes following exposure of 1000 - 2000 ppm hydrogen sulfide or 5,000 ppm carbon dioxide. Proceeded with the establishment Worker Rescuers and persons involved That has a biogas digester, knowledge, and working procedures. Do not allow It was recommended that people to go to the fermentation area.