Article
Biotechnology & Applied Microbiology
Ana Laura Santos, D. Barrie Johnson
Summary: This study investigated the effects of different combinations of small molecular weight alcohols on the performance and bacterial composition of a moderately low pH sulfidogenic bioreactor. The study found that the introduction of methanol initially had a negative impact on sulfate reduction/sulfide production rates, but these rates increased in subsequent phases due to microbial community adaptation. Ethanol utilization increased sulfide production rates, and the choice of substrate will be influenced by cost-effectiveness, availability, and toxicity to the microbial community.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
E. Fernandez-Palacios, Xudong Zhou, Mabel Mora, David Gabriel
Summary: In this study, the long-term performance and microbial dynamics of an Upflow Anaerobic Sludge Blanket (UASB) reactor targeting sulfate reduction were evaluated using crude glycerol as the organic carbon source. Illumina analyses of the 16S rRNA gene were used to study the bacterial community dynamics, revealing Desulfovibrio as the main sulfate-reducing genus in the reactor. Through sampling at different reactor heights and analysis of chemical species, insights into the performance and changes in targeted species of the sulfidogenic UASB were gained.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Engineering, Environmental
Wenhao Huang, Zhenshan Huang, Zhuoyao Chen, Zuotong Wu, Zaishan Wei
Summary: Flue gas cadmium is a persistent and toxic pollutant that can pose a threat to human health and the environment. A study investigated the use of a sulfate reducing membrane biofilm reactor (MBfR) for removing cadmium from flue gas. The reactor achieved a high removal efficiency of 95.1% and Desulfovibrio was found to be the dominant genus. The biofilm formation involved the conversion of cadmium into cadmium sulfide (CdS) and complexation with humic acids, resulting in bio-stabilization of the cadmium-containing flue gas.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Jun Li, Salma Tabassum
Summary: The study effectively improved the high concentration sulfate removal from sewage wastewater using an acid production-sulfate reduction reaction system. The two-phase anaerobic process showed successful results with over 40% COD removal efficiency in the acid-producing phase, demonstrating good synergistic effects between acid-producing bacteria and sulfate-reducing bacteria.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
X. Zhou, E. Fernandez-Palacios, A. D. Dorado, X. Gamisans, D. Gabriel
Summary: The study assessed the reactions and consumption/production rates involved in glycerol fermentation and sulfate reduction, finding that under sulfidogenic conditions, specific sulfate reduction rates using low molecular weight carbon sources (such as formate and ethanol) were 39% higher than those using high molecular weight carbon sources (such as propionate, 1,3-propanediol, and butanol).
Article
Engineering, Environmental
Yasuyuki Takemura, Masataka Aoki, Tsuyoshi Danshita, Akinori Iguchi, Shoji Ikeda, Yuma Miyaoka, Haruhiko Sumino, Kazuaki Syutsubo
Summary: In this study, an up-flow anaerobic sludge blanket (UASB) reactor was operated under psychrophilic conditions to investigate the effects of sulfate on the microbial characteristics of MEA-containing wastewater treatment. It was found that despite the increase in MEA and sulfate, the COD removal efficiency remained above 95%. However, the disintegration of granular sludge was observed when the sulfate concentration increased. Batch tests showed that propionate and acetate were produced as metabolites of MEA degradation. Sulfate acclimation led to a decrease in methane-producing activities and an increase in sulfate-reducing activities.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Liping Niu, Shuang Sun, Fangying Yu, Xinyue Zhang, Shiying Fan, Yue Sun, Wenlong Lin, Bowen Wang, Xingde Zhang
Summary: Water pollution caused by improper treatment of acid mine drainage (AMD) is a common problem in mining. This study focused on finding a simple and efficient treatment method for AMD by using sulfate-reducing bacteria (SRB) in an upflow anaerobic sludge blanket (UASB) reactor. The results showed that SRB had good reduction performance within pH 6.5 to 7.5, achieving the best reduction effect with 15% inoculum. The sulfate removal rate in the UASB reactor reached 80-90% under different initial sulfate concentrations.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Environmental
Yong Hu, Yang Yang, Yu -You Li
Summary: The experimental study focused on investigating the impact of oxygenation, pH shock, and H2S inhibition on the competition between sulfate-reducing bacteria (SRB) and methane-producing archaea (MPA) in a UASB reactor. Results showed that micro-oxygenation increased sulfate removal while slightly reducing methane production, and pH shock along with high H2S concentration altered the competition dynamics between SRB and MPA.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Shaocheng Si, Yuxin Ke, Boqian Xue, Ziye Zhang, Xiaoli Zhu
Summary: In this study, biochar was used as a carrier to immobilize the heavy metal tolerant sulfate-reducing bacteria SRB14-2-3 for the passivation of Zn-contaminated soil. The results showed that the immobilized bacteria exhibited effective passivation performance, reducing the bioavailable Zn fractions in the soil by up to 34.2%, 30.0% and 22.2% compared to the control group. The introduction of SRB14-2-3 into biochar alleviated adverse effects on the soil and significantly improved the reproduction of SRB14-2-3.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Tianwei Hao
Summary: This study investigated the response and adaptation mechanisms of granular and flocculent sulfate-reducing bacteria (SRB) sludge to acidic metal-laden wastewater (AMW). The results showed that the flocculent SRB lost more than 50% of their treatment capacity, while the granular SRB maintained a high metal removal rate throughout the trial. The stability of the granular structure and microbial activity was found to be influenced by the extracellular glycosyl compositions.
Article
Environmental Sciences
Marisa Raketh, Prawit Kongjan, Eric Trably, Nurta Samahae, Rattana Jariyaboon
Summary: Rubber wood ash can reduce high sulfate contents in skim latex serum and effectively treat desulfated skim latex serum (DSLS) with the generated biomethane. The study used an up-flow anaerobic sludge blanket (UASB) reactor to treat DSLS under mesophilic conditions. The organic loading rates (OLR) and effluent recirculation in the UASB reactor were found to significantly affect DSLS biodegradability and methane production. The dominant bacteria in the reactor were Proteobacteria, Bacteroidota, Firmicutes, and Desulfobacterota, while the archaeal community was mainly composed of Methanosaeta sp. and Methanomethylovorans sp.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Xia Ren, Ningzhen Yan, Shu Chen, Jun Yao, Jing Liu
Summary: This study used iron-reducing bacteria and sulfate-reducing bacteria for microbiologically-assisted reduction experiments to assess their effectiveness in alleviating arsenic pollution in soil. The results showed that different bacterial sequences and flow methods had an impact on the release and species of arsenic. Furthermore, chemical treatment only removed a portion of the arsenic, indicating that reductive dissolution and the formation of FeS were the main driving factors for arsenic release.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Jiemin Zhou, Jianmin Xing
Summary: Sulfate-reducing bacteria play a crucial role in responding to nitrate stress in saline-alkali environments, with the addition of nitrate activating the denitrification pathway in denitrifying bacteria and relieving nitrate inhibition on SRB.
Article
Environmental Sciences
Yuqi Wang, Mengrui Jie, Huining Zhang, Jia Yang, Meijuan Xu
Summary: This study investigated the use of an UASB reactor for efficient removal of nitrate from high sulfate and nitrate concentration industrial wastewater. The results showed a nitrate removal efficiency exceeding 96.0% in wastewater with a high sulfate concentration of 10 g/L. Autotrophic denitrifying bacteria such as Raoultella and Shinella, as well as heterotrophic denitrifying bacteria including Klebsiella, Simplicispira, and Thauera, were found to play important roles in the denitrification process.
Article
Green & Sustainable Science & Technology
Dimitra Theodosi Palimeri, Konstantina Papadopoulou, Apostolos G. Vlyssides, Anestis A. Vlysidis
Summary: This study investigates the effect of sulfate addition on the performance of a UASB reactor. The results show that appropriate sulfate concentrations in combination with iron can enhance methane production.
Article
Environmental Sciences
M. Mora, E. Fernandez-Palacios, X. Guimera, J. Lafuente, X. Gamisans, D. Gabriel
Article
Environmental Sciences
Xavier Guimera, Mabel Mora, Antonio David Dorado, Anna Bonsfills, David Gabriel, Xavier Gamisans
Summary: This study investigated the sequential wet absorption of SO(2) and NO(x) in a two-stage bioscrubber using NaOH-based absorbents. The results showed high removal efficiencies for both SO(2) and NO(x) under specific operating conditions, with the option of using oxidants for improved NO(x) removal. The reuse of bioprocess effluent as an absorbent showed promising results in terms of removal efficiencies and reduced reagents' consumption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
David Cueto, Mabel Mora, David Gabriel
Summary: Optimal production of biosulfur was achieved under limiting oxygen conditions where ammonium-oxidizing bacteria were not able to outcompete sulfide-oxidizing bacteria. The mathematical model accurately described the experimental profiles for ammonium, nitrite, sulfide, and sulfate as a function of the aeration flow rate.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Chemical
Luis Rafael Lopez, Mabel Mora, Caroline Van der Heyden, Juan Antonio Baeza, Eveline Volcke, David Gabriel
Summary: Biotrickling filters are widely used for biogas desulfurization, but achieving robust and reliable operation has been challenging. Control strategies involve regulating air flowrate and trickling liquid velocity to control oxygen and hydrogen sulfide gas outlet concentrations, respectively, to enhance performance.
Article
Environmental Sciences
E. Fernandez-Palacios, Xudong Zhou, Mabel Mora, David Gabriel
Summary: In this study, the long-term performance and microbial dynamics of an Upflow Anaerobic Sludge Blanket (UASB) reactor targeting sulfate reduction were evaluated using crude glycerol as the organic carbon source. Illumina analyses of the 16S rRNA gene were used to study the bacterial community dynamics, revealing Desulfovibrio as the main sulfate-reducing genus in the reactor. Through sampling at different reactor heights and analysis of chemical species, insights into the performance and changes in targeted species of the sulfidogenic UASB were gained.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Engineering, Environmental
Mira L. K. Sulonen, Juan Antonio Baeza, David Gabriel, Albert Guisasola
Summary: This study found that adjusting pH and sulphide concentration under specific conditions can increase sulphate reduction rate, thus effectively treating acid mine drainage and minimizing environmental impact.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Enric Blazquez, David Gabriel, Juan Antonio Baeza, Albert Guisasola, Pablo Ledezma, Stefano Freguia
Summary: Bio-electrochemical systems (BES) are a versatile technological platform for treating various types of wastewaters and recovering valuable products, with the potential of high elemental sulfur production rates and lower energy consumption per kg of S-0 produced compared to conventional electrochemical recovery systems.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Environmental Sciences
Francesco Spennati, Salvatore La China, Giovanna Siracusa, Simona Di Gregorio, Alessandra Bardi, Valeria Tigini, Gualtiero Mori, David Gabriel, Giulio Munz
Summary: This study demonstrated that a microbial community dominated by fungi could be successfully maintained in a pilot-scale packed-bed reactor fed with tannery wastewater under non-sterile conditions. The reactor, inoculated with a pure culture of Aspergillus tubingensis and Quebracho tannin as sole carbon source during start-up, achieved significant removal of COD and DOC from the tannery wastewater. The evolution of the microbial consortium and its adaptation to the support media size were examined throughout the experiment.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Environmental Sciences
X. Zhou, E. Fernandez-Palacios, A. D. Dorado, X. Gamisans, D. Gabriel
Summary: The study assessed the reactions and consumption/production rates involved in glycerol fermentation and sulfate reduction, finding that under sulfidogenic conditions, specific sulfate reduction rates using low molecular weight carbon sources (such as formate and ethanol) were 39% higher than those using high molecular weight carbon sources (such as propionate, 1,3-propanediol, and butanol).
Article
Environmental Sciences
Cecilia Polizzi, David Gabriel, Giulio Munz
Summary: Partial denitrification is a valuable solution for NO2- supply in Anammox systems. By controlling influent S/N ratio and sludge retention time (SRT), sulphide-driven Partial Autotrophic Denitrification (PAD) can achieve high conversion efficiencies of NO2-. The study also found that stable S-limiting conditions favor the enrichment of Sulphur Oxidizing Bacteria (SOB).
Review
Environmental Sciences
Daniel Gonzalez, David Gabriel, Antoni Sanchez
Summary: This review examines the development of waste treatment plants based on biological treatments worldwide. The main challenge faced by these plants is the reduction of malodorous emissions. The article discusses the methodology for determining odors, the main causes of undesirable gaseous emissions, and the characterization of odors. It also explores various odor abatement technologies, particularly those related to low-impact biological processes.
Article
Environmental Sciences
Daniel Gonzalez, Joan Colon, Antoni Sanchez, David Gabriel
Summary: This study conducted a characterization of gaseous emissions in a full-scale municipal wastewater treatment plant in Barcelona to identify the main sources of odour and greenhouse gas emissions. The results can be used to develop mitigation strategies and estimate the environmental impact of wastewater treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biotechnology & Applied Microbiology
Zainab Ul, Pilar Sanchez-Pena, Mireia Baeza, Mira Sulonen, David Gabriel, Juan Antonio Baeza, Albert Guisasola
Summary: This study evaluates the performance of different anode materials in bioelectrochemical systems (BES) and finds that carbon brush (CB) and high-active-area carbon felt (CF3) electrodes have the best overall performance, allowing for shorter start-up time and improved performance.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Engineering, Environmental
X. Zhou, A. D. Dorado, J. Lafuente, X. Gamisans, D. Gabriel
Summary: In this study, a mathematical model considering multiple pathways of glycerol fermentation combined with sulfate reduction was established and verified. It was found that glycerol fermentation mainly went through oxidative and reductive pathways, producing ethanol and 1,3-propanediol. 1,3-propanediol was converted to 3-hydroxypropionate coupled with sulfate reduction, and 3-hydroxypropionate was further oxidized to acetate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
