Related Experiment Video
Updated: Dec 29, 2025

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production
Published on: March 22, 2024
Performance enhancement of H2S-based autotrophic denitrification with bio-gaseous CO2 as sole carbon source through
Yongjie Liu1, Nan Chen2, Shuang Tong3
1Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences, Beijing), Ministry of Education, No. 29 Xueyuan Road, Haidian District, Beijing, 100083, China; School of Water Resources and Environment, China University of Geosciences (Beijing), No. 29 Xueyuan Road, Haidian District, Beijing, 100083, China.
Abstract:
H2S-based denitrification could achieve synchronous removal of nitrate and H2S and had been regarded as an efficient way for biogas desulfurization and wastewater denitrification. Using CO2 in biogas as carbon source had a potential of saving cost further, but the performance deteriorated due to the drop in pH. Two kinds of nature ore, medical stone and phosphate ore, were added as new pH adjustment materials in this study, and feasibility of using CO2 as sole carbon source for H2S-based denitrification was investigated. As a result, both materials could increase the pH from 4.5 to above 6.0. Compared with medical stone, higher level of pH (up to 6.39) and nitrate removal efficiency (99.1%) were obtained with phosphate ore. In addition, ATP increased more rapidly than the control, reflecting improvement on microbial activities. Therefore, phosphate ore as the pH adjustment material could improve H2S-based denitrification performance obviously.
More Related Videos
08:17Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
Published on: August 14, 2020
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
Related Concept Videos
Carbon-dioxide Fixation
Bioremediation
Metabolism of Chemolithotrophs
Inorganic Nitrogen Assimilation