Article
Engineering, Environmental
Hanna Virpiranta, Ville-Hermanni Sotaniemi, Tiina Leiviska, Sanna Taskila, Jaakko Ramo, D. Barrie Johnson, Juha Tanskanen
Summary: This study developed a biological method for the simultaneous removal of sulfate and metals from acidic low-temperature mining effluents using a mixed consortium of cold-tolerant sulfate-reducing bacteria. The experimental results showed that sulfate reduction rates increased with higher initial sulfate concentrations, indicating better adaptability of the sulfate-reducing bacterial consortium at higher sulfate concentrations.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Junxi Dai, Zhongyi Huang, Hongguo Zhang, Huihui Shi, Samuel Raj Babu Arulmani, Xianjie Liu, Lei Huang, Jia Yan, Tangfu Xiao
Summary: This study explores the use of ZIF-67 modified bio-cathode for improved sulfate reduction, antimony removal, and hydrogen production in microbial electrolysis cell (MEC). The modified bio-cathode achieved a high sulfate reduction rate and efficient antimony removal, resulting in a significant hydrogen production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Shuyuan Deng, Bo Wang, SanBao Su, Shanshan Sun, Yuehui She, Fan Zhang
Summary: This study investigated the field application of a bio-inhibitor (nitrate and nitrite injection) for souring control in an oilfield. The results showed that the bio-inhibitor effectively removed H2S from the injected water, leading to cost-effective treatments for souring control.
Article
Engineering, Environmental
M. Danouche, A. Bounaga, R. Boulif, Y. Zeroual, R. Benhida, K. Lyamlouli
Summary: Phosphogypsum (PG) generated during phosphoric acid production contains a significant amount of sulfate, which can be biologically converted into sulfide. This study focuses on selecting and evaluating microbial consortia from sulfate-rich environments for the initial step of sulfur recovery. The MYC-consortium isolated from a hydrothermal niche showed the highest reduction capacity and performance under various conditions. This research provides insights into the potential of the MYC-consortium in converting sulfate from PG into sulfide, which is a critical step in sulfur biorecovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Guodong Chai, Dongqi Wang, Yitong Zhang, Hui Wang, Jiake Li, Xiaosheng Jing, Haiyu Meng, Zhe Wang, Yuan Guo, Chunbo Jiang, Huaien Li, Yishan Lin
Summary: This study investigated the effects of external organic substrates on the activity and stability of sulfate-reducing bacteria in acid mine drainage treatment. The results showed that microcosms containing complex organic wastes had a good effect on reducing heavy metals and acidity in acid mine drainage. Crab shell and shrimp shell showed the best removal performance and offered a cost-efficient, stable, and environmentally friendly solution for acid mine drainage treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Elis Watanabe Nogueira, Leandro Augusto Gouvea de Godoi, Lauren Nozomi Marques Yabuki, Gunther Brucha, Marcia Helena Rissato Zamariolli Damianovic
Summary: The down flow structured bed bioreactor (DFSBR) was successfully used to treat synthetic acid mine drainage by removing sulfate, precipitating metals, and adjusting pH. Geobacter and Desulfovibrio were identified as the main genera responsible for sulfate and metal reduction.
BIORESOURCE TECHNOLOGY
(2021)
Article
Microbiology
Qi-Yun Liang, Jin-Yu Zhang, Daliang Ning, Wen-Xing Yu, Guan-Jun Chen, Xuanyu Tao, Jizhong Zhou, Zong-Jun Du, Da-Shuai Mu
Summary: Inhibiting sulfate-reducing bacteria (SRB) has shown various effects on microbial community properties and coexistence patterns, indicating the importance of SRB in organic matter (OM) degradation. Suppression of SRB resulted in decreased relative abundances of several bacterial families and altered network and community assembly processes. These findings highlight the essential role of SRB in OM degradation.
Article
Environmental Sciences
Catherine J. Gandy, Neil D. Gray, Obioma K. Mejeha, Angela Sherry, Adam P. Jarvis
Summary: The study investigates the effectiveness of liquid carbon additions to enhance zinc removal in laboratory-scale short hydraulic residence time compost bioreactors. The results show that carbon supplementation is necessary to sustain effective removal of elevated zinc concentrations. Propionic acid addition improves and sustains performance by promoting the activities of sulfate reducing bacteria, leading to efficient zinc removal. On the other hand, cessation of propionic acid addition compromises zinc removal due to carbon limitation and the growth of sulfur oxidising bacteria. These findings demonstrate the potential of liquid carbon additions in enhancing rates of zinc attenuation in compost-based passive treatment systems with limited land availability, enabling remediation of highly polluting mine drainage.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Ziran Yang, Hisaaki Hosokawa, Masashi Kuroda, Daisuke Inoue, Michihiko Ike
Summary: This study evaluated the potential of microbial communities in river sediments to reduce and remove Sb(V) from the aqueous phase, showing a relatively wide distribution of microbial Sb(V) reduction potential and presence of multiple types of Sb(V) reduction pathways, including direct and indirect reduction by microbial sulfate reduction.
Article
Microbiology
Payal Thakur, Mathew O. Alaba, Shailabh Rauniyar, Ram Nageena Singh, Priya Saxena, Alain Bomgni, Etienne Z. Gnimpieba, Carol Lushbough, Kian Mau Goh, Rajesh Kumar Sani
Summary: There is a large amount of literature on biocorrosion, but manually extracting genes and proteins is time-consuming. This study presents a text mining workflow that automatically extracts biocorrosion-associated genes/proteins in sulfate-reducing bacteria (SRB) from literature databases. The identified genes were validated and categorized as core and accessory gene families in 63 SRB genomes. The study suggests that text mining can significantly reduce manual curation time.
Article
Engineering, Environmental
JunHee Ryu, JaeHyun Jung, KiYoung Park, WonJung Song, ByeongGyu Choi, JiHyang Kweon
Summary: The membrane bioreactor with humic acid substrate (MBR-H) showed effective organic removal and the Proteobacteria phylum played a significant role in humic acid degradation. Various operational parameters in MBRs can be adjusted to facilitate the evolution of microbial consortia for efficient degradation of refractory organic matter.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Fuliang Bai, Shuo Liu, Jun Ma, Yingjie Zhang
Summary: This study utilized recombinant genetic engineered SRB (rSRB) and immobilized-microbial bioaugmentation to treat sulfate-rich metal-laden wastewater. The results showed that Bio-AnMBR achieved high removal efficiency of sulfate and heavy metals by upregulating key genes and enzymes and improving system stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qian Wang, Guoying Zhou, Yixuan Qin, Ruifei Wang, Huiyu Li, Fei Xu, Yuanda Du, Congcong Zhao, Huanxin Zhang, Qiang Kong
Summary: The study found that in IWS-enhanced CWs with and without Phragmites australis, the sulfate removal rate was higher compared to controls. Microbial analysis showed that the abundance of sulfate-reducing bacteria, sulfur oxidizing bacteria, and carbon-degrading bacteria improved sulfate removal efficiency. Co-occurrence network analysis revealed interactions between different bacteria, including competition and cooperation to enhance nutrient removal processes.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Bruna Del Busso Zampieri, Elis Watanabe Nogueira, Ana Julia Fernandes Cardoso de Oliveira, Irene Sanchez-Andrea, Gunther Brucha
Summary: The study analyzed the influence of metals on the activity and composition of sulfate-reducing bacteria (SRB), finding that an increase in metal concentration led to decreased SRB activity. The more toxic metals, such as Cd and Cu, were associated with less SRB and more fermenters in the microbial community, while less toxic metals like Cr and Zn had a higher abundance of SRB genera. An isolated Desulfovibrio species may have implications for future bioremediation studies in neutral pH effluents contaminated by metals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
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
Engineering, Environmental
Yuya Sato, Takaya Hamai, Tomoyuki Hori, Tomo Aoyagi, Tomohiro Inaba, Kentaro Hayashi, Mikio Kobayashi, Takeshi Sakata, Hiroshi Habe
Summary: The study found that sulfate-reducing bacteria (SRB) can acclimatize to bioreactor environments without a preincubation phase. The amount of rice bran and hydraulic retention time significantly impact reactor performance, with lower rice bran amounts and shorter HRT leading to deteriorations in performance. Operating bioreactors with 200 g of rice bran and an HRT of 12.5 h was the most effective in treating AMD, showing a sulfate reduction rate of 20.7-77.9% during days 54-242.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Saki Oya, Satoshi Tonegawa, Hirari Nakagawa, Hiroshi Habe, Toshiki Furuya
Summary: In this study, microorganisms that can transform and cleave the ether bond of 2-phenoxyacetophenone, a model compound for the beta-O-4 linkage in lignin, were isolated and characterized. Among them, Acinetobacter sp. TUS-SO1 efficiently and selectively cleaves the ether bond of 2-phenoxyacetophenone. These microorganisms may play important roles in the degradation of lignin-related compounds in nature.
SCIENTIFIC REPORTS
(2022)
Article
Microbiology
Yong Guo, Hideyuki Ihara, Tomo Aoyagi, Tomoyuki Hori, Yoko Katayama
Summary: This study presents the draft genome sequences of two sulfur-oxidizing chemolithoautotrophic bacteria, Sulfurovum spp. TSL1 and TSL6, isolated from tsunami-launched marine sediment in the Great East Japan earthquake.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2022)
Article
Engineering, Environmental
Yiwen Zhou, Risako Toyoda, Toshikazu Suenaga, Tomo Aoyagi, Tomoyuki Hori, Akihiko Terada
Summary: Urban rivers are an important source of nitrous oxide (N2O), and this study investigates the impact of treated sewage discharge on N2O concentrations and microbial processes in the Tama River in Japan. The research findings reveal the significant effect of treated sewage on N2O emissions in the river.
Article
Engineering, Environmental
Tomohiro Inaba, Takuto Goto, Tomo Aoyagi, Tomoyuki Hori, Keita Aoki, Yuya Sato, Noriaki Ono, Tsutomu Furihata, Hiroshi Habe, Satoshi Ogino, Atsushi Ogata
Summary: Treating ironworks wastewater with high concentrations of nitrate is a major challenge in steel manufacturing. In this study, we developed an N-2 gas aerated anaerobic membrane bioreactor (AnMBR) and evaluated its nitrate removal capacity. Our findings showed that AnMBR, with the involvement of denitrification and Hyphomicrobium nitrativorans, can effectively degrade nitrate.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agronomy
Shota Shirane, Noriaki Momma, Toshiyuki Usami, Chiharu Suzuki, Tomoyuki Hori, Tomo Aoyagi, Seigo Amachi
Summary: Anaerobic soil disinfestation (ASD) is an ecofriendly alternative to chemical fumigation for eliminating soil-borne plant pathogens. This study found that caproate, produced by a specific strain of bacteria, is a key disinfestation factor in ethanol-based ASD, and the direct application of caproate to soil could be a promising strategy for rapid and stable soil disinfection.
Article
Biotechnology & Applied Microbiology
Yuya Sato, Teruhiko Miwa, Tomohiro Inaba, Takuto Akachi, Eiji Tanaka, Tomoyuki Hori, Keita Murofushi, Hiroshi Takagi, Hiroyuki Futamata, Tomo Aoyagi, Hiroshi Habe
Summary: This study shows that the use of microbial fertilizer (MF) can increase biomass and biofilm formation in hydroponic tomato plants. The microbial community structures of tomato roots and hydroponic water are affected by MF compared to commercial inorganic fertilizer (IF), especially with the dominance of three specific operational taxonomic units (OTUs) related to disease-suppressive microbes.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinyi Zhou, Taku Fujiwara, Taira Hidaka, Fumitake Nishimura, Tomohiro Nakanishi, Akihiko Terada, Tomoyuki Hori
Summary: In this study, a microaerobic activated sludge process (MAS) was proposed as a pretreatment method to retain NH4-N from high-strength nitrogenous wastewater. The MAS systems achieved high NH4-N retention rates and TOC removal rates. The emissions of CO2 and N2O during MAS were evaluated, and the mechanisms of N2O emission from each reactor were investigated. The study highlighted the importance of N2O mitigation in the MAS process, especially under acidic conditions.
Article
Engineering, Environmental
Ralph Rolly Gonzales, Keizo Nakagawa, Kazuo Kumagai, Susumu Hasegawa, Atsushi Matsuoka, Zhan Li, Zhaohuan Mai, Tomohisa Yoshioka, Tomoyuki Hori, Hideto Matsuyama
Summary: This study demonstrates a hybrid osmotically assisted reverse osmosis (OARO) and reverse osmosis (RO) process for the enrichment and recovery of ammoniacal nitrogen in wastewater, resulting in energy-saving and economic benefits.
Article
Chemistry, Applied
Katsuya Nouzaki, Ryoichi Tanaka, Yuya Sato, Tomohiro Inaba, Tomo Aoyagi, Tomoyuki Hori, Hiroshi Yanagishita, Hiroshi Habe
Summary: The discharge of high-strength oily wastewater has negative impacts on the environment, making the treatment of food industry wastewater containing fats, oils, and grease crucial. This study used a membrane bioreactor (MBR) to treat Ramen noodle-soup wastewater and evaluated the optimal oil concentration for MBR startup in both winter and summer. The MBR system demonstrated successful startup in both seasons with a 20-fold dilution of the original oily wastewater, containing approximately 950 to 1,200 mg/L oil and 3,000 to 4,400 mg/L biological oxygen demand (BOD).
JOURNAL OF OLEO SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Tomohiro Inaba, Mami Yamaguchi, Akira Taniguchi, Yuya Sato, Tomo Aoyagi, Tomoyuki Hori, Hiroyuki Inoue, Masahiko Fujita, Masanori Iwata, Yoshihiro Iwata, Hiroshi Habe
Summary: This study evaluated the decolorization effect of granular sludge from an anaerobic expanded granular sludge bed (EGSB) reactor on 11 dyes, and observed for the first time a decolorization rate of over 94% for the dyes in model textile wastewater. Sequencing analysis revealed that the operational taxonomic unit related to Paludibacter propionicigenes showed the highest increase in abundance ratios in the presence of dyes.
JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY
(2022)