Advertisement

Topics

Performance improvement of a thermophilic sulfate-reducing bioreactor under acidogenic conditions: Effects of diversified operating strategies.

07:00 EST 24th November 2017 | BioPortfolio

Summary of "Performance improvement of a thermophilic sulfate-reducing bioreactor under acidogenic conditions: Effects of diversified operating strategies."

The establishment of a sulfidogenic environment under thermophilic (55 °C) acidogenic conditions was assessed in an innovative structured-bed bioreactor to enhance sulfate removal and acetate production prior to methanogenesis. Diversified operating strategies, i.e., variations in the hydraulic retention time (HRT; 6-12 h), sulfate loading rate (SLR; 8-16 kg SO42- m-3 day-1) and liquid phase recirculation ratio (0.0-57.0) were assessed to both enable the establishment of sulfate-reducing conditions and remove H2S from the liquid phase. Ethanol was used as the only carbon source. Applying a low HRT (6 h) as the initial operating strategy severely hindered the establishment of sulfate-reducing bacteria (SRB) populations within the system (sulfate removal < 27.5%). In turn, applying effluent recirculation had a positive impact on the system (sulfate removal ∼ 60%) by providing an adequate buffer control along the entire height of the system, as well by displacing over 70% of the H2S to the gaseous phase. The maintenance of pH values above 6.1 proved to be adequate for the sulfidogenic activity, whereas enhanced acidic conditions (pH < 6.0) at the basal portion of the reactor comprised a determining factor to hinder sulfate reduction. SRB were able to handle H2S and acetate concentrations as high as 232 mg L-1 and 3111 mg L-1, respectively, after establishing an effective acidogenic/sulfidogenic environment, indicating that the proposed system has the potential to be used as the first stage in the anaerobic processing of sulfate-rich wastewater streams.

Affiliation

Journal Details

This article was published in the following journal.

Name: Journal of environmental management
ISSN: 1095-8630
Pages: 303-312

Links

DeepDyve research library

PubMed Articles [13250 Associated PubMed Articles listed on BioPortfolio]

Separate Production of Hydrogen and Methane from Cassava Wastewater with Added Cassava Residue under a Thermophilic Temperature in Relation to Digestibility.

In this research, the separate production of hydrogen (H) and methane (CH) from cassava wastewater with added cassava residue was investigated using a two-stage upflow anaerobic sludge blanket (UASB) ...

Simultaneous enhancement of nonylphenol biodegradation and short-chain fatty acids production in waste activated sludge under acidogenic conditions.

Nonylphenol (NP) biodegradation in waste activated sludge (WAS) under anaerobic conditions is usually slow, and no information on NP biodegradation under acidogenic conditions is currently available. ...

Volatile fatty acids and biogas recovery using thermophilic anaerobic membrane distillation bioreactor for wastewater reclamation.

The effects of bioreactor temperatures and salinities of an anaerobic membrane distillation bioreactor (anMDBR) on the permeation performance and their potential recovery of bioresources were fully ex...

Impact of reactor configuration on treatment performance and microbial diversity in treating high-strength dyeing wastewater: Anaerobic flat-sheet ceramic membrane bioreactor versus upflow anaerobic sludge blanket reactor.

In this study, an anaerobic flat-sheet ceramic membrane bioreactor (AnCMBR) was used to treat high-strength dyeing wastewater, and compared with an upflow anaerobic sludge blanket (UASB) reactor. The ...

Response of the reactor performance and microbial community to a shift of ISDD process from micro-aerobic to anoxic condition.

Micro-aerobic condition has proven to be effective in enhancing sulfide oxidation to elemental sulfur (S) during integrated simultaneous desulfurization and denitrification process (ISDD). In this stu...

Clinical Trials [7745 Associated Clinical Trials listed on BioPortfolio]

Magnesium Sulfate for the Improvement of Cognition in Patients With Alzheimer Disease

This study is to examine the possible effect of supplementing Magnesium sulfate on patients with Alzheimer Disease (AD) in controlling or reducing the amount of amyloid present in the brai...

Clinical Study of the LRS ThermoSuit™ System in Post Arrest Patients With Intravenous Infusion of Magnesium Sulfate

This study will involve the use of therapeutic hypothermia. This prospective cohort pilot study will evaluate the clinical performance of a new device, the ThermoSuit™ System, to achiev...

Intraoperative Magnesium Sulfate Administration During Orthotopic Liver Transplantation

The aim of study is to assess the effect of intraoperative use of magnesium sulfate in liver donating patients in reducing post-operative morphine requirements in early postoperative 24 ho...

Efficacy of Magnesium Sulfate on Reducing Renal Colic in the Emergency Department

To determine if magnesium sulfate paired with an analgesic medication will improve patient pain from renal colic compared with analgesic alone.

Ferrous Acetyl-Aspartylated Casein Formulation Evaluation Over Ferrous Sulfate in Iron Deficiency Anemia

The scope of this study is to compare the efficacy of the new oral formulation of Fe-ASP to oral ferrous sulfate in patients with iron deficiency anemia (IDA) for the restoration of decrea...

Medical and Biotech [MESH] Definitions

A genus of extremely thermophilic, sulfate-reducing archaea, in the family Archaeoglobaceae.

An order of extremely thermophilic, sulfate-reducing archaea, in the kingdom EURYARCHAEOTA. The single family Archaeoglobaceae contains one genus ARCHAEOGLOBUS.

Performance of an act one or more times, with a view to its fixation or improvement; any performance of an act or behavior that leads to learning.

Derivatives of chondroitin which have a sulfate moiety esterified to the galactosamine moiety of chondroitin. Chondroitin sulfate A, or chondroitin 4-sulfate, and chondroitin sulfate C, or chondroitin 6-sulfate, have the sulfate esterified in the 4- and 6-positions, respectively. Chondroitin sulfate B (beta heparin; DERMATAN SULFATE) is a misnomer and this compound is not a true chondroitin sulfate.

An enzyme that catalyzes the activation of sulfate ions by ATP to form adenosine-5'-phosphosulfate and pyrophosphate. This reaction constitutes the first enzymatic step in sulfate utilization following the uptake of sulfate. EC 2.7.7.4.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article