Hydrogen sulfide generation suppression by nitrate addition -application to solid waste landfill site

2015 Fiscal Year Final Research Report

• Project/Area Number: 25740039
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Modeling and technologies for environmental conservation and remediation
• Research Institution: Nagasaki University
• Principal Investigator: ASAKURA Hiroshi 長崎大学, 水産・環境科学総合研究科(環境), 准教授 (00391061)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 最終処分場 / 廃石膏ボード / 硫化水素 / 抑制

Outline of Final Research Achievements

In Japan, three deaths were reported at an inert solid waste landfill site after exposure to hydrogen sulfide (H2S) generated at the site. H2S gas is produced when sulfate-reducing bacteria (SRB) convert sulfate derived from waste gypsum board under anaerobic conditions. The recommended countermeasure is to supply oxygen by installing gas venting pipes. However, a large cost is necessary for pipe installation and the pipes are not applicable to coastal landfill sites. On the other hand, H2S generation suppression by nitrate (NO3) addition has been reported in sewage systems. In this study, in order to develop a method to suppress H2S generation by NO3 addition at a landfill site, the extent of suppression was quantitatively estimated.

Free Research Field

廃棄物工学