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

BACKGROUND

Hydrogen sulfide (HS) 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.

RESULTS

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·day. By incorporating 1% activated carbon, an efficient, naturally degradable bio-composite membrane was developed, achieving a maximum HS adsorption capacity of 7.3 g·m·day. FY-07 remained stable in soil and improved the microbial community for HS treatment.

CONCLUSION

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.