Related Experiment Video
Updated: Aug 6, 2026
15:19
Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Sulfate-reducing bacteria treating sulfate-containing wastewater based on improving electron transfer efficiency: A
Saisai Guo1, Zhipeng Chen1, Qi Zhang1
1School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
Environmental Research
|July 20, 2026
Summary
Enhancing sulfate-reducing bacteria (SRB) efficiency in wastewater treatment is key. This review details five strategies, evaluating their potential for practical application and combined use to overcome performance bottlenecks.
Area of Science:
- Environmental Microbiology
- Wastewater Treatment Technologies
- Biotechnology
Background:
- Sulfate-reducing bacteria (SRB) are crucial for treating sulfate-laden wastewater.
- Electron transfer efficiency is a primary limitation in SRB-based systems.
- Understanding and enhancing electron transfer mechanisms are vital for optimizing wastewater treatment performance.
Purpose of the Study:
- To systematically review and evaluate five strategies for enhancing SRB performance.
- To classify electron transfer bottlenecks in SRB processes (DET, IET, DIET).
- To provide a decision-making framework for selecting and optimizing SRB enhancement strategies.
Main Methods:
- Literature review of five enhancement strategies: photoelectric effect, bioelectrochemical systems (BES), conductive materials, electron shuttles (ES), and biostimulants.
- Classification of electron transfer bottlenecks (DET, IET, DIET).
- Development of a comparative framework including core principles, energy/carbon demands, applicability, maturity, cost, pollution risk, and stability.
Main Results:
- Conductive materials and biostimulants show engineering-scale potential.
- Bioelectrochemical systems (BES) are transitioning from pilot to engineering scale.
- Photoelectric effect and electron shuttles (ES) are primarily at the laboratory scale.
- Combined strategies offer synergistic benefits but face cost and scale-up challenges.
Conclusions:
- Individual and combined strategies have varying potential for SRB wastewater treatment.
- Conductive materials and biostimulants are promising for industrial application.
- Further research and development are needed to address limitations of combined strategies for large-scale implementation.
Related Concept Videos
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
01:25Microbial Bioremediation of Uranium
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
01:24Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...