Simultaneous recovery of bio-sulfur and bio-methane from sulfate-rich wastewater by a bioelectrocatalysis coupled two-phase anaerobic reactor

Yuan, Y.; Zhang, Lulu; Chen, YangQuan; Huang, Yutong; Qian, Xucui; He, Juan; Li, Zhaoxia; Ding, Cheng; Wang, Aijie

doi:10.1016/j.biortech.2022.127883

Cited by 15 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, limited attention has been given to the performance of MEC-AD systems under sulfate-reducing conditions with a specific emphasis on methane production. Recent findings indicate that MEC-AD reactors can establish mildly alkaline conditions, resulting in a significant reduction in free H 2 S levels (p K a of 7.0), consequently leading to enhanced methane production. , …”

Section: Introductionmentioning

confidence: 99%

Exploration of Optimum Configurations of Electro-Assisted Anaerobic Digester for Sulfate-Reducing Conditions: Significance of Membranes and Mechanistic Insights

Huang,

Liu,

Dhar

2024

ACS EST Eng.

View full text Add to dashboard Cite

Sulfides generated from sulfate reduction commonly act as inhibitors in anaerobic digestion (AD). This study examined the performance of three configurations of microbial electrolysis cell-assisted anaerobic digestion (MEC-AD) systems: single-chamber, dual-chamber with an anion exchange membrane (AEM), and dual-chamber with a cation exchange membrane (CEM), operated under sulfate-reducing conditions. In general, the single-chamber MEC-AD reactors exhibited significantly higher methane yields (74.5−75.0%) than the control (64.4%). Upon converting a single-chamber MEC-AD to a dual-chamber configuration using an AEM, methane yield further increased up to 80.6%. The membrane facilitated the transfer of buffer anions to the anode and sulfate to the cathode, which substantially reduced un-ionized sulfide concentrations in the anode chamber. The MEC-AD with an AEM also demonstrated increased specific methanogenic activities, current densities, and microbial diversity with the enrichment of electroactive bacteria (e.g., Geobacter, Aeromonas) and hydrogenotrophic Methanobacterium. However, the MEC-AD reactor with a CEM experienced a significant reduction in methane yield (63.2%), mainly due to anolyte acidification, which increased the un-ionized sulfide concentrations.

show abstract

Section: Introductionmentioning

confidence: 99%

Exploration of Optimum Configurations of Electro-Assisted Anaerobic Digester for Sulfate-Reducing Conditions: Significance of Membranes and Mechanistic Insights

Huang,

Liu,

Dhar

2024

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

Bioelectrochemical System-Integrated Anaerobic Digestion

Zhang,

Du,

Wang

2024

Green Energy and Technology

View full text Add to dashboard Cite

Electrochemical and bioelectrochemical sulphide removal: A review

Karlsen,

Dinamarca

2024

Rev Environ Sci Biotechnol

View full text Add to dashboard Cite

The increased demand for energy worldwide and the focus on the green shift have raised interest in renewable energy sources such as biogas. During biogas production, sulphide (H2S, HS− and S2−) is generated as a byproduct. Due to its corrosive, toxic, odorous, and inhibitory nature, sulphide is problematic in various industrial processes. Therefore, several techniques have been developed to remove sulphide from liquid and gaseous streams, including chemical absorption, chemical dosing, bioscrubbers, and biological oxidation. This review aims to elucidate electrochemical and bioelectrochemical sulphide removal methods, which are gaining increasing interest as possible supplements to existing technologies. In these systems, the sulphide oxidation rate is affected by the reactor design and operational parameters, including electrode materials, anodic potential, pH, temperature and conductivity. Anodic and bioanodic materials are highlighted here, focusing on recent material developments and surface modification techniques. Moreover, the review focuses on sulphide generation and inhibition in biogas production processes and introduces the prospect of removing sulphide and producing methane in one single bioelectrochemical reactor. This could introduce BESs for combined biogas upgrading and cleaning, thereby increasing the methane content and removing pollutants such as sulphide and ammonia in one unit.

show abstract

Simultaneous recovery of bio-sulfur and bio-methane from sulfate-rich wastewater by a bioelectrocatalysis coupled two-phase anaerobic reactor

Cited by 15 publications

References 35 publications

Exploration of Optimum Configurations of Electro-Assisted Anaerobic Digester for Sulfate-Reducing Conditions: Significance of Membranes and Mechanistic Insights

Exploration of Optimum Configurations of Electro-Assisted Anaerobic Digester for Sulfate-Reducing Conditions: Significance of Membranes and Mechanistic Insights

Bioelectrochemical System-Integrated Anaerobic Digestion

Electrochemical and bioelectrochemical sulphide removal: A review

Contact Info

Product

Resources

About