Work

Bioremediation of non-point hydrogen sulfide emissions using bacterial cellulose/activated carbon membrane

Year: 2025

Type: article

Abstract: Hydrogen sulfide (H 2 S) gas, characterized by its low odor threshold and toxicity, poses significant challenges in non-point source odor management. Traditional biotechnologies are effective in removing malodorous gases from point sources but they are limited for non-point source odor control. In this study, the sqr and pdo genes from Cupriavidus pinatubonensis JMP134 were introduced into the bacterial cellulose-producing strain Kosakonia oryzendophytica FY-07. This genetic modification enhanced the strain’s sulfur oxidation capacity, which increased over time, with an average transformation capacity of approximately 275 mg·L − 1 ·day − 1 . By incorporating 1% activated carbon, an efficient, naturally degradable bio-composite membrane was developed, achieving a maximum H 2 S adsorption capacity of 7.3 g·m − 3 ·day − 1 . FY-07 remained stable in soil and improved the microbial community for H 2 S treatment. The resulting bio-composite membrane is environment-friendly and efficient, making it suitable for emergency odor control in landfills. This study offers recommendations for using membrane materials in managing non-point hydrogen sulfide emissions.

Source: Microbial Cell Factories

DOI: 10.1186/s12934-025-02686-0