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Performance of a continuous flow reactor on bio-reducing vanadium with straw.
Liting Hao1, Bangyan Wang1, Jinkai Shi1
1Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
Bioresource Technology
|April 20, 2023
Summary
Introducing microbes enhanced vanadium (V) reduction in groundwater using straw as a carbon source. This bio-reduction method offers a sustainable approach to mitigate environmental and health risks associated with vanadium contamination.
Area of Science:
- Environmental Science
- Microbiology
- Water Treatment
Background:
- Vanadium (V) in groundwater poses significant environmental and health risks.
- Effective remediation strategies are needed to address vanadium contamination.
Purpose of the Study:
- To evaluate the efficiency of continuous flow reactors using straw as a carbon source for V(V) reduction.
- To investigate the role of microbial communities in the bio-reduction of V(V).
Main Methods:
- Application of continuous flow reactors with straw and inoculated sludge for V(V) reduction.
- Scanning Electron Microscopy (SEM) to analyze microbial utilization of straw.
- Microbial community analysis to identify dominant species.
Main Results:
- High V(V) reduction efficiency (71.8%-99.9%) achieved with straw and inoculated sludge over two months.
- Lower efficiency (39.2-66.6%) observed with straw alone, indicating the importance of microbial activity.
- SEM images confirmed microbial colonization and utilization of straw.
- Identification of Treponema and Prevotellaceae as dominant microbial groups with metal reduction and polysaccharide degradation capabilities.
Conclusions:
- Inoculated microbes are essential for efficient bio-reduction of V(V) using straw.
- Agricultural biomass like straw can serve as a sustainable carbon source, reducing reliance on conventional carbon sources and benefiting carbon emissions.
- This approach offers a promising bio-remediation strategy for vanadium-contaminated groundwater.
