Article
Engineering, Environmental
Md Abu Hanifa Jannat, Jangwoo Lee, Seung Gu Shin, Seokhwan Hwang
Summary: The study enriched propionate degrading consortia from four different seeding sources and identified dominant syntrophic microbial groups through 16s rRNA gene based metagenomics analysis. Accelerated microbial shifts were observed at high-strength phase with a significant decrease of Syntrophaceae up to 26.9%. Response Surface Methodology revealed that pH 6.8-6.9 and temperature 34.5-34.9 C-omicron were optimum growth conditions for the propionate degradation culture.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Saowaluck Haosagul, Sukunya Oaew, Peerada Prommeenate, Vanatpornratt Sawasdee, Nipon Pisutpaisal
Summary: This study designed a microarray based on the entire genome and functional genes for monitoring the sulfur oxidizing bacteria in the starch industry, demonstrating high-quality DNA concentration and yield. The expression level of recirculating sludge increased compared to starting sludge, with some bacteria gaining higher gene expression levels related to sulfide oxidation.
Article
Energy & Fuels
Guillermo I. Quijano, Edgardo Valenzuela, Domingo Cantero, Martin Ramirez, Ivonne Figueroa-Gonzalez
Summary: This study demonstrated that anoxic desulfurization process can impact the CH4 and CO2 content of purified biogas. The reduction in CO2 concentration and increase in CH4 concentration in the purified biogas were found to be proportional, with CO2 absorption playing a role in this process. Additionally, the presence of methane-oxidizing bacteria suggests that methane oxidation occurred in the desulfurization system.
Article
Microbiology
Chao Li, Liping Hao, Fan Lu, Haowen Duan, Hua Zhang, Pinjing He
Summary: Syntrophic acetate oxidation plays a vital role in the anaerobic digestion of protein-rich feedstocks. This study enriched the syntrophic acetate-oxidizing bacteria (SAOB) community and identified both known and novel SAOB candidates through metagenomic analyses.
Article
Engineering, Environmental
Felix Egger, Tim Hulsen, Damien J. Batstone
Summary: Anaerobic digestion produces biogas that requires desulfurization before use due to its corrosive nature. A continuous desulfurization process using purple phototrophic bacteria, powered by light, was developed as an alternative to traditional methods. This caustic-free process can integrate with anaerobic digestion using centrate as a nutrient source, but may be limited by the availability of light for nighttime operation in a scaled process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Aina Soler-Jofra, Lisbeth Schmidtchen, Lluc Olmo, Mark C. M. van Loosdrecht, Julio Perez
Summary: This study investigates the short and long term impact of hydroxylamine on partial nitritation granular sludge. The results indicate that dissolved oxygen is the main factor determining the impact of hydroxylamine. Short term hydroxylamine feeding with low dissolved oxygen leads to higher hydroxylamine accumulation and N2O production, while long term hydroxylamine feeding reduces ammonium consumption rate.
Article
Environmental Sciences
Yi-Xin Zhang, Yong-Xin Li, Wei Zhang, Yun Niu, Raymond Jianxiong Zeng
Summary: This study successfully enriched hydrogen-oxidizing bacteria (HOB) using urea and found copper-tolerant HOB in a 5.47 mg/L Cu2+ environment. These results provide potential methods to obtain biofertilizer from copper-containing urea wastewater via HOB.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Wei Zhang, Yong-Xin Li, Yun Niu, Fang Zhang, Yi-Bing Li, Raymond Jianxiong Zeng
Summary: The study demonstrates that a two-stage method can be used for specific enrichment of HOB as biofertilizers, expanding the application of HOB in agriculture.
Article
Environmental Sciences
J. M. S. Oliveira, J. S. Poulsen, E. Foresti, J. L. Nielsen
Summary: A multiple stage anaerobic system was proven effective for reductive decolorization of azo dyes in the presence of sulfate. The system achieved significant bulk color removal and organic matter and sulfate reduction in separate reactors. By utilizing amplicon sequencing and correlation analysis, the microbial communities and pathways involved in azo dye removal were identified, with reductive decolorization being mainly associated with hydrogen-producing pathways and the involvement of an azoreductase from Lactococcus lactis. The findings enhance our understanding of the role of different microbial communities in anaerobic treatment of azo dyes and can aid in the design of improved solutions for textile effluent treatment.
Article
Environmental Sciences
Shuang Gao, Zhiling Li, Yanan Hou, Aijie Wang, Qian Liu, Cong Huang
Summary: This study compared the effects of glucose, ethanol, and acetate on sulfur-oxidizing denitrifying microorganisms, with results suggesting that acetate is a more suitable carbon source for denitrification-desulfurization systems.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Tianli Ma, Cheng Cheng, Lizhen Xing, Yuepeng Sun, Guangxue Wu
Summary: A better understanding of r-/K-strategists nitrifiers will help to balance the design and operation of bioprocesses for efficient pollution removal from wastewater. The study investigated the biokinetics, biofilm property, microbial community, and quorum sensing (QS) of nitrifying biofilm in a continuously flow reactor (CFR) and a sequencing batch reactor (SBR). Results showed that Nitrospira and Candidatus Nitrospira defluvii were the dominant nitrite-oxidizing taxa in both reactors. The biofilm in SBR had higher ratios of polysaccharide and protein in extracellular polymeric substances and higher thickness compared to CFR. AHLs-based QS might affect the formation of nitrifying biofilm and contribute to the different biokinetics of Nitrospira in CFR and SBR.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Man Tang, Jiao Feng, Hou-Fu Xia, Chun-Miao Xu, Ling-Ling Wu, Min Wu, Shao-Li Hong, Gang Chen, Zhi-Ling Zhang
Summary: This paper presents a continuous magnetic separation microfluidic chip that allows for rapid and continuous in vivo cell detection. The chip has shown potential in studying the circulation of tumor cells in the blood, providing a new platform for exploring the cellular mechanism of tumor metastasis.
CHEMICAL COMMUNICATIONS
(2023)
Article
Environmental Sciences
Xiaoyun Li, Xu Yang, Mengyao Cui, Yiliang Liu, Jingting Wang, Lixia Zhang, Guoqiang Zhan
Summary: This study focuses on the design and development of a highly specific and sensitive biofilm sensor for nitrite detection in water. The sensor utilizes the competition of oxygen between nitrite-oxidizing bacteria and cathode oxygen reduction for nitrite detection. The sensor shows a linear response and high selectivity for nitrite, and exhibits stability in long-term detection.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Monika Yadav, Vivekanand Vivekanand
Summary: In this study, chitinolytic bacteria were used for bioaugmentation of fungal pretreated agricultural residues to enhance biogas production. Batch and continuous experiments showed that the addition of chitinolytic bacteria to wheat and pearl millet straw pretreated with Chaetomium globosporum resulted in increased biogas yield. Microbial community analysis revealed higher abundance of methanogens in reactors running with pretreated wheat straw, mainly consisting of Firmicutes, Bacteroidetes, Proteobacteria phyla.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Khuram Maqsood, Asif Jamil, Anas Ahmed, Burhannudin Sutisna, Suzana Nunes, Mathias Ulbricht
Summary: Biogas is a clean and sustainable energy source that is widely available worldwide. In order to fully utilize the benefits of this cleaner resource, it is essential to remove other gases and enrich the methane content. This study explores the use of blend membranes composed of polyetherimide (PEI) and polyvinyl acetate (PVAc) to enhance the performance of methane enrichment. The results show that PVAc is an excellent option for expanding the separation performance of blended polymeric membranes for biogas enrichment.
Article
Agricultural Engineering
Ebba Perman, Anna Schnurer, Annika Bjorn, Jan Moestedt
Summary: Optimization of the biogas generation process is crucial for improving degradation and methane yield. In this study, serial digester systems were found to increase methane yield and protein degradation, while reducing the inhibitory effect of high ammonia levels on methane production.
BIOMASS & BIOENERGY
(2022)
Article
Microbiology
Anna Schnurer, Abhijeet Singh, Shaojie Bi, Wei Qiao, Maria Westerholm
Summary: A novel anaerobic bacterial strain, AMB_01T, was isolated from a high-ammonia biogas digester and characterized. The strain showed unique characteristics such as growth at a wide range of temperatures, tolerance to high ammonia concentration, and utilization of various carbon sources. Analysis of genomic data confirmed that AMB_01T represents a new species, named Miniphocaeibacter halophilus sp. nov.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Astronomy & Astrophysics
Nina Kopacz, Joleen Csuka, Mickael Baque, Iaroslav Iakubivskyi, Hrefna Gudlaugardottir, Ingeborg J. Klarenberg, Mahid Ahmed, Alexandra Zetterlind, Abhijeet Singh, Inge Loes ten Kate, Eric Hellebrand, Brent R. Stockwell, Arni B. Stefansson, Oddur Vilhelmsson, Anna Neubeck, Anna Schnurer, Wolf Geppert
Summary: Lava tubes on Mars have the potential to preserve life and biosignatures, and studying their Earth counterparts in Iceland can provide valuable insights. By analyzing biological, molecular, and mineralogical data from Icelandic lava tubes, researchers discovered copper-rich minerals and bacterial communities that show characteristics expected for potential life on Mars. These findings have implications for future Mars missions and contamination prevention.
EARTH AND SPACE SCIENCE
(2022)
Article
Microbiology
Giselle C. Martin-Hernandez, Bettina Muller, Christian Brandt, Martin Hoelzer, Adrian Viehweger, Volkmar Passoth
Summary: The oleaginous yeast species Rhodotorula babjevae can produce valuable compounds through biotechnological processes. In this study, the genomes of two R. babjevae strains were resolved at the chromosomal level, revealing their tetraploid nature and the presence of strain-specific extrachromosomal DNA. The genome sequences provide insights into genetic tools, fungal evolution, and potential differences between the strains.
Article
Biotechnology & Applied Microbiology
George Cheng, Florian Gabler, Leticia Pizzul, Henrik Olsson, Ake Nordberg, Anna Schnurer
Summary: This study investigated the microbial community development within an anaerobic trickle bed reactor during methanation of syngas using different nutrient media. The results showed that different nutrient sources, including undefined medium of different origins, can support the syngas methanation process. Additionally, the dominant microbial community remained relatively stable over time.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Volkmar Passoth, Jule Brandenburg, Mikolaj Chmielarz, Giselle. C. C. Martin-Hernandez, Yashaswini Nagaraj, Bettina Muller, Johanna Blomqvist
Summary: By studying microbial lipid production, it was found that there is high variability in lipid accumulation on different waste materials and waste oil. In addition, some microorganisms can produce antioxidant carotenoids. Optimizing microbial lipid production and its application are of great significance for replacing vegetable oil.
Editorial Material
Microbiology
Andreas Otto Wagner, Maria Westerholm, Blaz Stres, Jan Kopecny
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Karin Ahlberg Eliasson, Abhijeet Singh, Simon Isaksson, Anna Schnurer
Summary: This study examined the effects of carbohydrate, protein and fat as co-substrates for biogas production from cattle manure. The results showed increased gas yield for all co-digestion reactors, but only the reactor supplemented with rapeseed oil showed synergistic effects on methane yield. The addition of albumin promoted enrichment of known ammonia-tolerant syntrophic acetate- and potential propionate-degrading bacteria, but still caused slight process inhibition and less efficient overall degradation of organic matter in general, and of cellulose in particular.
MICROBIAL BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Eldon R. Rene, Prakash K. Sarangi, Violeta Sanchez i Nogue, Anna Schnurer, Davinia Salvachua
Summary: This paper presents the scientific breakthroughs in bioprocess engineering and microbial biotechnology for the conversion of wastes into valuable products and biofuels. It highlights the significant results in hybrid electrosynthesis, enzymatic degradation of plastics, production of polyhydroxyalkanoate and 5-aminolevulinic acid, fermentation technology, and the application of molecular engineering tools in bioprocess technology.
MICROBIAL BIOTECHNOLOGY
(2023)
Review
Biotechnology & Applied Microbiology
Yapeng Song, Wei Qiao, Maria Westerholm, Guangqun Huang, Mohammad J. Taherzadeh, Renjie Dong
Summary: Anaerobic digestion of animal manure is important for generating renewable energy and reducing greenhouse gas emissions. However, there are challenges in maximizing methane yields due to lignocellulose degradation in cattle manure and microbial inhibition by ammonia in chicken, duck, or swine manure. This review provides insights into the microbial mechanisms causing these problems and discusses strategies for improving the anaerobic digestion process, including optimizing conditions for ammonia-tolerant microorganisms and using additional materials or ammonia removal technologies.
FERMENTATION-BASEL
(2023)
Article
Agriculture, Dairy & Animal Science
Sophie J. Krizsan, Mohammad Ramin, Juana C. C. Chagas, Anni Halmemies-Beauchet-Filleau, Abhijet Singh, Anna Schnurer, Rebecca Danielsson
Summary: The effects of adding Asparagopsis taxiformis to the diets of dairy cows on rumen microbiome and milk quality were investigated. The results showed that the addition of Asparagopsis taxiformis significantly reduced methane production and altered rumen fermentation parameters. Milk quality was also affected, with an increase in bromine and iodine concentrations.
FRONTIERS IN ANIMAL SCIENCE
(2023)
Article
Environmental Sciences
He Sun, Jolanta J. Levenfors, Christian Brandt, Anna Schnurer
Summary: A novel Bacillus strain FW1 isolated from biogas digestate has been found to exhibit resistance to meropenem (MEM). The strain was characterized as Heyndrickxia oleronia and the mechanism of resistance was explored. The study confirmed that the MEM-resistance of strain FW1 is not transferable, reducing the risk of spreading resistance to the environment when using digestate as fertilizer.
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2023)
Article
Mathematical & Computational Biology
Abhijeet Singh, Anna Schnurer
Summary: AcetoBase is a public database that collects and manages sequences of formyltetrahydrofolate synthetase (FTHFS). The latest version of the AcetoBase database provides new sequence data and taxonomy, along with improvements in web functionality and user interface. The evaluation demonstrates significant improvements in the taxonomic assignment of FTHFS sequences.
DATABASE-THE JOURNAL OF BIOLOGICAL DATABASES AND CURATION
(2022)
