Article
Engineering, Environmental
Emily M. Rohlf, Sajjad Karimi, Christopher A. Bareither
Summary: The study showed that early addition of liquid waste did not stimulate anaerobic decomposition of fresh MSW, and most liquid wastes were not suitable as the sole moisture source for bioreactor landfills. MSW reactors co-disposed with sludge produced more methane, while reactors co-disposed with gypsum board or foundry waste also generated methane, despite inhibitory effects indicated by biochemical methane potential (BMP) results.
Article
Environmental Sciences
Mengmeng Jiang, Wei Qiao, Pengwu Jiang, Zhiyue Wu, Min Lin, Yibo Sun, Renjie Dong
Summary: A hybrid anaerobic membrane bioreactor (Hy-AnMBR) was developed with the incorporation of polyurethane sponge carriers to mitigate membrane fouling. The results showed that the addition of sponge carriers reduced solid concentration and improved filtration performance. SEM analysis indicated that the cake layer fouling in Hy-AnMBR was less than the control AnMBR. CLSM analysis revealed that sponge carriers mitigated pore-blocking and reduced total membrane resistance compared to the control. Chemical cleaning was essential for pollutant removal and membrane permeability recovery.
Article
Environmental Sciences
Giovanni Gadaleta, Carmen Ferrara, Sabino De Gisi, Michele Notarnicola, Giovanni De Feo
Summary: The partial degradation of cellulose-based bioplastics in industrial treatment of organic fraction of Municipal Solid Waste (MSW) opened to the investigation of further disposal routes for bioplastics in the waste management system. The environmental footprint of three MSW management scenarios differing only for the bioplastics final destination was assessed through a Life Cycle Assessment (LCA) approach. Results showed that treatment of bioplastics with organic waste achieved the worst environmental performance, while treatment with plastics and mixed waste achieved negative impact values, indicating reduced greenhouse gas emissions and comparable benefits.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Wei Peng, Zhijie Wang, Yinhui Shu, Fan Lu, Hua Zhang, Liming Shao, Pinjing He
Summary: This study assessed the degradation of PBAT/PLA based biopolymer bags during digestion processes, finding no biological degradation after digestion but subsequent aerobic treatment facilitated the degradation of polymers.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Swakshar Saha, Abid Hussain, Jangho Lee, Eunseok Lee, Hyung-Sool Lee
Summary: This study developed an integrated LBR-AnMBR system for efficient stabilization and biogas recovery from food waste at room temperatures. The system achieved high hydrolysis and acidification yields through the optimized leachate recirculation rate. The solubilized food waste was further stabilized in the AnMBR, resulting in high COD removal and methane yields. The system also produced high-quality permeates containing valuable nutrients for reuse.
Article
Microbiology
Zijie Yu, Xinhua He, Zhitong Li, Shuang Zhou, Dalu Guo, Hao Pu, Hongyan Luo
Summary: This study investigated the existence, abundance, and diversity of anaerobic ammonium oxidation (anammox) bacteria in purple paddy soils at different temperatures. By using C-13-DNA stable-isotope probe and Illumina MiSeq high-throughput sequencing, the researchers found differences in the abundance and diversity of anammox bacteria in purple paddy soils at different temperatures. These findings contribute to a better understanding of the regulation of soil nitrogen cycling.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Agricultural Engineering
Sergi Vinardell, Sergi Astals, Konrad Koch, Joan Mata-Alvarez, Joan Dosta
Summary: The study evaluated the economic implications of co-digesting sewage sludge and food waste in anaerobic membrane bioreactors. It found that higher electricity revenue from co-digesting food waste could offset additional costs, but not when treating nutrients backload in sidestream digesters. Biosolids disposal was identified as the most significant cost in all scenarios, and sensitivity analysis showed that food waste gate fee influenced co-digestion economic feasibility.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Mengmeng Jiang, Zhiyue Wu, Junqiang Yao, Simon M. Wandera, Dalal E. Algapani, Renjie Dong, Wei Qiao
Summary: The study investigated a hybrid submerged anaerobic membrane bioreactor for the thermophilic anaerobic digestion of food waste, showing high stability, efficient organic removal, and excellent membrane filtration performance.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Jin Sun, Yasunori Kosaki, Koji Kawamura, Nobuhisa Watanabe
Summary: This study demonstrates the performance of ethanol fermentation pretreatment (EP) for food waste in achieving high-load anaerobic digestion operation using an anaerobic membrane bioreactor (AnMBR). By increasing the organic loading rate (OLR) and maintaining a low propionic acid accumulation, the methane content in biogas was significantly improved. Additionally, the study showed that primary methanogens were tolerant to ammonia inhibition, leading to improved buffering capacity at high load, and identified the abundance of hydrogenotrophic methanogens in AnMBR through 16S rRNA sequence analysis. The results suggest that the EP contributes to creating a virtuous cycle by maintaining a lower hydrogen partial pressure and achieving ultra-high load in the system.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Environmental
Guangze Guo, Shitong Zhou, Yujie Chen, Yu Qin, Xia Huang, Yu-You Li
Summary: This study investigates the improvement of anaerobic digestion efficiency and energy recovery potential through the optimization of solid retention time (SRT) in a high-solid anaerobic membrane bioreactor (AnMBR). The results show that extending the SRT enhances substrate degradation efficiency and biogas yield. However, a long SRT leads to membrane fouling, which can be controlled by regulating the flux. The study provides practical engineering applications for AnMBRs in solid waste treatment.
Article
Agricultural Engineering
Zhiyue Wu, Yuan Liu, Junqiang Yao, Xiaoyu Zheng, Simon Mdondo Wandera, Renjie Dong, Yu-You Li, Wei Qiao
Summary: The study demonstrated that an AnMBR system with high flux and membranes embedded in high solid conditions can effectively treat leachate from the organic fraction of municipal solid waste (OFMSW), with sustainable flux identified through the research.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Cevat Yaman, Suriya Rehman, Tanveer Ahmad, Yusuf Kucukaga, Burcu Pala, Noor AlRushaid, Syed Riyaz Ul Hassan, Ayse Burcu Yaman
Summary: This study examined the microbial communities in landfill bioreactor systems through analyzing geotextile fabric samples from different reactors. The dominant bacterial phyla on the geotextile fabric were Firmicutes, Bacteroidetes, and Thermotogeae, while Euryarchaeota was the predominant archaeal phylum. Insights were provided for opportunities in landfill process modifications and operational optimization based on the diversity of microorganisms.
Article
Biotechnology & Applied Microbiology
Ming-Chi Chiu, Haon-Yao Chen, Chien-Hsien Lee, Pui-Kwan Andy Hong, Ping-Yi Yang, Cheng-Fang Lin
Summary: Anaerobic immobilized bio-plates reactor (AnIBPR) demonstrated potential in enhanced domestic wastewater treatment by efficiently degrading carbohydrates and proteins, leading to methane production. The experiment results showed that even at low temperatures, AnIBPR maintained good COD removal and methane recovery efficiencies.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Multidisciplinary Sciences
Tristan A. Caro, Jamie McFarlin, Sierra Jech, Noah Fierer, Sebastian Kopf
Summary: In this study, the growth rates of soil microorganisms were measured using hydrogen-stable isotope probing of lipids with 2H-enriched water. The results showed that microbial growth rates in soil are slow, with average generation times of 14 to 45 days. Furthermore, there is a decoupling of microbial abundance and growth in soil microbiomes. This study highlights the importance of measuring growth rates to complement standard analyses of soil microbial communities.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Microbiology
Dariia Vyshenska, Pranav Sampara, Kanwar Singh, Andy Tomatsu, W. Berkeley Kauffman, Erin E. Nuccio, Steven J. Blazewicz, Jennifer Pett-Ridge, Katherine B. Louie, Neha Varghese, Matthew Kellom, Alicia Clum, Robert Riley, Simon Roux, Emiley A. Eloe-Fadrosh, Ryan M. Ziels, Rex R. Malmstrom
Summary: Answering the questions, who is eating what? and who is active? within complex microbial communities is essential for modeling, predicting, and modifying microbiomes for improved human and planetary health. Stable isotope probing can be used to track the incorporation of labeled compounds into cellular DNA during microbial growth to address these questions. However, traditional stable isotope methods face challenges in establishing links between an active microorganism's taxonomic identity and genome composition while providing quantitative estimates of the microorganism's isotope incorporation rate. This study presents an experimental and analytical workflow that improves the detection of metabolically active microorganisms and provides better quantitative estimates of genome-resolved isotope incorporation, thus refining ecosystem-scale models for carbon and nutrient fluxes within microbiomes.
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)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.