Article
Microbiology
Mathilde Stephanie Willemin, Romain Hamelin, Florence Armand, Christof Holliger, Julien Maillard
Summary: In this study, proteomic analysis of Desulfitobacterium hafniense strain DCB-2 revealed key proteins involved in various energy metabolisms. The researchers identified proteins up-regulated in different growth conditions and analyzed their roles in metabolic pathways.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Engineering, Chemical
Edoardo Dell'Armi, Marco Zeppilli, Bruna Matturro, Simona Rossetti, Marco Petrangeli Papini, Mauro Majone
Summary: The study introduces a sequential bioelectrochemical process composed of two membrane-less microbial electrolysis cells operated with synthetic groundwater, leading to a temporary reduction in PCE removal efficiency due to the establishment of sulphate and nitrate reduction processes.
Article
Biotechnology & Applied Microbiology
Megan Meinel, James Wang, Evan Cox, Phil Dennis, Cesar Torres, Rosa Krajmalnik-Brown
Summary: The influence of electrokinetic-enhanced bioremediation (EK-BIO) on subsurface microbial communities was investigated at a field-scale demonstration site, showing similar trends to laboratory studies with decreased alpha diversity and temporally differing beta diversity based on treatment phase. Enrichments in specific taxa were linked to the bioaugmentation culture and electron donor.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Guofang Xu, Hung Liang Ng, Chen Chen, Siyan Zhao, Jianzhong He
Summary: This study demonstrates that bioaugmentation with Dehalococcoides can accelerate the remediation of pentabrominated diphenyl ethers (PBDEs) in sediments, and the presence of tetrachloroethene (PCE) can improve the bioaugmentation performance. Ecological analysis shows that bioaugmentation leads to more deterministic microbial communities.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Edoardo Dell'Armi, Marco Zeppilli, Federica De Santis, Marco Petrangeli Papini, Mauro Majone
Summary: The study demonstrated the potential to reduce the energy consumption of the MEC process by selecting appropriate HRT and applied cathodic potential, thereby avoiding side reactions and optimizing current generation.
Article
Engineering, Environmental
Marco Zeppilli, Bruna Matturro, Edoardo Dell 'Armi, Lorenzo Cristiani, Marco Petrangeli Papini, Simona Rossetti, Mauro Majone
Summary: A bioelectrochemical process combining two membrane-less reactors equipped with graphite granules counter electrode was developed for perchloroethylene removal. The reductive reactor completely reduced PCE into VC and Eth, which were efficiently removed by the oxidative reactor. Different redox niches in each compartment allowed the co-existence of both reducing and oxidative reactions, enhancing the overall efficiency of PCE removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Daniele Ghezzi, Maria Filippini, Martina Cappelletti, Andrea Firrincieli, Davide Zannoni, Alessandro Gargini, Stefano Fedi
Summary: The study conducted on highly contaminated chlorinated aliphatic organics in the subsoil of Ferrara, Italy revealed the importance of microbial degradation as a key mechanism for the dechlorination process. Through analysis of microbial communities using 16S rRNA gene sequencing and metabolic gene analysis, a complex network of metabolic interactions was hypothesized to support effective reductive dechlorination. This study provides insights into the diversity of microbial communities and potential dechlorinators in contaminated aquifer systems, shedding light on the microbial processes involved in bioremediation efforts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Microbiology
Huijuan Jin, Leitao Huo, Yi Yang, Yan Lv, Jingjing Wang, Julien Maillard, Christof Holliger, Frank E. Loffler, Jun Yan
Summary: Two anaerobic bacterial isolates, ACSDCET and ACSTCE, capable of respiring tetrachloroethene (PCE), were characterized. These strains showed unique morphological and physiological characteristics, including optimum growth conditions, electron donors, and acceptors. Genomic analysis further confirmed the distinction of these strains from other Sulfurospirillum species, proposing a new species named Sulfurospirillum diekertiae sp. nov. This study provides important insights into the diversity and functionalities of PCE-respiring bacteria.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2023)
Article
Geochemistry & Geophysics
Edward J. O'Loughlin, David R. Burris
Summary: Chlorinated ethenes, commonly used as solvents and degreasers, have caused significant soil and groundwater contamination. This study found that green rust alone was ineffective in reducing chlorinated ethenes, but the presence of Ag(I) or Cu(II) improved the removal of these pollutants.
Article
Environmental Sciences
Masaki Asai, Yuki Morita, Lingyu Meng, Hidetoshi Miyazaki, Naoko Yoshida
Summary: This study demonstrates that stainless alloy vessels may inhibit the dechlorination ability of Dehalococcoides strains, while titanium vessels can achieve complete dechlorination even after repeated use.
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2023)
Article
Engineering, Environmental
Guofang Xu, Siyan Zhao, Chen Chen, Ning Zhang, Jianzhong He
Summary: Contamination of groundwater by multiple chlorinated solvents is a common issue that poses a significant challenge for effective remediation. This study reveals that different cocontaminants have varying inhibitory effects on the dechlorination process, with chloroform showing the strongest inhibition. The inhibitory effects of cocontaminants can be mitigated by introducing specific bacterial strains, resulting in the concurrent detoxification of multiple chlorinated solvents. Furthermore, the presence of cocontaminants leads to significant changes in the composition, structure, and assembly of the dechlorinating microbiome.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Marta M. Rossi, Sara Alfano, Neda Amanat, Fabiano Andreini, Laura Lorini, Andrea Martinelli, Marco Petrangeli Papini
Summary: In this study, polyhydroxy butyrate (PHB) and biochar from pine wood (PWB) were used in a mini-pilot scale biological reactor for trichloroethylene (TCE) removal. PHB acted as an electron donor source, while PWB served as a support and adsorption material for Dehalococcoides. The results showed that the coupled adsorption and biodegradation process effectively removed chlorinated compounds.
BIOENGINEERING-BASEL
(2022)
Article
Environmental Sciences
Shahrzad Saffari Ghandehari, Jessica Boyer, Dana Ronin, James R. White, Cathleen J. Hapeman, Dana Jackson, Devrim Kaya, Alba Torrents, Birthe V. Kjellerup
Summary: Many groundwater aquifers worldwide are polluted with trichloroethene (TCE), which poses risks to human and ecosystem health. Permeable Reactive Barriers (PRB) are commonly used for TCE-contaminated groundwater remediation, and biosolids from wastewater treatment plants can serve as a beneficial PRB filling material. Bench scale experiments found that although biosolids led to increased methanogenesis, TCE reductive dechlorination was not impaired. Moreover, biosolids enhanced the abundance of dechlorination microorganisms and methanogens, which contributed to maintaining an efficient dechlorinating microbial community.
Article
Microbiology
Marta M. Rossi, Bruna Matturro, Neda Amanat, Simona Rossetti, Marco Petrangeli Papini
Summary: By combining biological and chemical/physical treatments, the remediation strategy for chlorinated solvents can be improved. A coupled adsorption and biodegradation process using a biofilm-biochar reactor demonstrated that biochar effectively adsorbs trichloroethylene (TCE) and slows down the release of its intermediates. This study suggests the feasibility of using biochar to support the reductive dechlorination process, opening up new possibilities for field-scale applications.
Article
Biotechnology & Applied Microbiology
Takashi Ohashi, Kenji Sugimoto, Yoshikatsu Sasaki, Masashi Hisamoto
Summary: Chloroethenes, commonly used as solvents in industries, have negatively affected human health due to spillage into soil and groundwater. This study demonstrates the bioremediation of chloroethene-contaminated soil using wine pomace extract (WPE) which promotes anaerobic degradation of chloroethenes.
BIORESOURCES AND BIOPROCESSING
(2023)
Article
Biochemistry & Molecular Biology
Koichi Toyoda, Masayuki Inui
MOLECULAR MICROBIOLOGY
(2018)
Article
Biotechnology & Applied Microbiology
Yota Tsuge, Naoto Kato, Shogo Yamamoto, Masako Suda, Masayuki Inui
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
(2019)
Article
Biotechnology & Applied Microbiology
Tetsu Shimizu, Haruhiko Teramoto, Masayuki Inui
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2019)
Article
Biotechnology & Applied Microbiology
Yota Tsuge, Naoto Kato, Shogo Yamamoto, Masako Suda, Toru Jojima, Masayuki Inui
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2019)
Editorial Material
Biochemical Research Methods
Sung Ok Han, Masayuki Inui, Yong-Su Jin
BIOTECHNOLOGY JOURNAL
(2019)
Article
Biotechnology & Applied Microbiology
Shinichi Oide, Yuya Tanaka, Akira Watanabe, Masayuki Inui
ENZYME AND MICROBIAL TECHNOLOGY
(2019)
Article
Biotechnology & Applied Microbiology
Tetsu Shimizu, Haruhiko Teramoto, Masayuki Inui
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2019)
Article
Biotechnology & Applied Microbiology
Satoshi Hasegawa, Toru Jojima, Masako Suda, Masayuki Inui
METABOLIC ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Hiroto Uchikura, Koichi Toyoda, Hiroki Matsuzawa, Hikaru Mizuno, Kazuaki Ninomiya, Kenji Takahashi, Masayuki Inui, Yota Tsuge
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2020)
Article
Biotechnology & Applied Microbiology
Takahisa Kogure, Masako Suda, Kazumi Hiraga, Masayuki Inui
Summary: Protocatechuic acid (PCA) is a natural bioactive phenolic acid that can be produced by Corynebacterium glutamicum through the DHS and 4-HBA pathways. Simultaneous utilization of both pathways is an efficient method for PCA production, with the highest reported productivity reaching 82.7 g/L.
METABOLIC ENGINEERING
(2021)
Article
Biochemical Research Methods
Shiori Nakazawa, Osamu Imaichi, Takahisa Kogure, Takeshi Kubota, Koichi Toyoda, Masako Suda, Masayuki Inui, Kiyoto Ito, Tomokazu Shirai, Michihiro Araki
Summary: The technique involves computational suggestion of genetic modifications based on design history, retrieval of well-known designs related to the history, and enhancement of production through experimental modification. The successful utilization of former cycles suggests relevant designs worth testing, ultimately aiding in the development of bioprocessing.
ACS SYNTHETIC BIOLOGY
(2021)
Article
Chemistry, Physical
Haruhiko Teramoto, Tetsu Shimizu, Masako Suda, Masayuki Inui
Summary: This study explored the genetic engineering of Escherichia coli for hydrogen production. The introduction of exogenous hydrogenase and inactivation of endogenous hydrogenases resulted in both hydrogen production and uptake. Disabling the pathways for ethanol, lactate, and succinate production significantly increased hydrogen production. Unexpectedly, high expression of exogenous hydrogenase completely repressed hydrogen production, and the introduction of heterologous enzyme repressed the endogenous hydrogen production ability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Microbiology
Koichi Toyoda, Riki Sugaya, Akihiro Domon, Masako Suda, Kazumi Hiraga, Masayuki Inui
Summary: Understanding the metabolic pathways and regulation of amino acids is crucial for optimizing amino acid production. This study identified and characterized the ans operon that is involved in the catabolism of L-Asn in Corynebacterium glutamicum R. The operon consists of genes encoding a transcriptional regulator (AnsR), asparaginase (AnsA2), aspartase (AspA2), and permease (AnsP). The enzymes and permease encoded by this operon are essential for the utilization of L-Asn. The study also revealed the regulatory mechanism of the operon, with AnsR acting as a transcriptional repressor that is inhibited by L-Asn.
Article
Biotechnology & Applied Microbiology
Tetsu Shimizu, Haruhiko Teramoto, Masayuki Inui
Summary: This study provides a novel approach for increasing the yield of photofermentative H-2 production from acetate by purple nonsulfur phototrophic bacteria. This study further suggests that polyhydroxyalkanoate is not only a storage substance for carbon and energy in bacteria, but may also act as a signaling molecule that mediates bacterial metabolic adaptations to specific environments.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Chemistry, Physical
Haruhiko Teramoto, Masako Suda, Masayuki Inui
Summary: This study investigates the inhibitory compounds in dilute sulfuric acid-pretreated corn stover on hydrogen production by Escherichia coli. The results indicate that acetate is the primary inhibitory factor.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)