Article
Agricultural Engineering
Shaohong Zheng, Xiangyin Liu, Xiangjing Yang, Hongen Zhou, Jin Fang, Siyuan Gong, Junfeng Yang, Jiannv Chen, Tiansheng Lu, Ming Zeng, Yujie Qin
Summary: By changing the molar ratio of influent C/N/S, this study explored the denitrification performance and microbial community in mixotrophic denitrification systems. The results showed that the joint action of several genera, including Thauera, Pacacoccus, Fusibacter Pseudoxanthomonas, Thiobacillus, Sulfurovum, and Sulfurimonas, contributed to efficient denitrification. The relative abundances of Thauera, Thiobacillus, and Sulfurimonas increased after the addition of S2-, indicating a potential mechanism for improving denitrification performance in mixotrophic systems.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Xianxin Luo, Chengyi Peng, Penghui Shao, Aiping Tang, Anping Huang, Qi Wu, Longhui Sun, Liming Yang, Hui Shi, Xubiao Luo
Summary: The IHAD-MnO process developed in this study shows potential for high nitrate removal efficiency and manganese oxidation efficiency in organic-limited polluted water. It provides a highly efficient and cost-effective solution for sustainable water treatment technologies with less carbon consumption and greenhouse gas emission.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Shuaimin Chen, Eiko E. Kuramae, Zhongjun Jia, Binbin Liu
Summary: This study utilized stable isotope probing and molecular biology techniques to investigate the composition and function of active denitrifying microorganisms in the vadose zone. It revealed significant differences in the composition and function of active denitrifiers between different soil layers. This research improves our understanding of active denitrifying microbes in the vadose zone and provides insights for reducing nitrate pollution in groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Microbiology
Arnaud Jeglot, Sebastian Reinhold Sorensen, Kirk M. Schnorr, Finn Plauborg, Lars Elsgaard
Summary: Woodchip bioreactors for denitrification are less efficient in cold temperatures, but bioaugmentation with cold-adapted denitrifying bacteria can potentially enhance nitrate removal efficiency. Enrichments of denitrifiers from woodchip material showed differences in composition compared to native microbiomes, indicating potential for efficient NO3- removal at cold temperatures.
Article
Engineering, Environmental
Aylin Ebru Yenilmez, Selin Ertul, Tulay Yilmaz, Deniz Ucar, Francesco Di Capua, Erkan Sahinkaya
Summary: In this study, the simultaneous removal of PNP and NO3- was investigated under autotrophic and heterotrophic denitrifying conditions. The results showed that autotrophic denitrification with elemental sulfur can efficiently eliminate both PNP and NO3-, even at high concentrations. ORP was identified as a possible control parameter to modulate PNP removal efficiency. Additionally, the autotrophic column showed better resiliency compared to the heterotrophic one.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Environmental Sciences
Yunmeng Pang, Jianlong Wang
Summary: This paper discusses the issue of nitrate pollution in water and wastewater, as well as the use of various electron donors for biological denitrification. Depending on the types of electron donors, denitrification can be classified into heterotrophic and autotrophic denitrification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Zhenguo Chen, Minlan Lou, Peizhen Fang, Dunquan Xiao, Wenting Zhu, Hongwei Chen, Wei Qian
Summary: This study investigates the structure and function of sulfur autotrophic denitrification microbial communities using sodium thiosulfate and elemental sulfur as electron donors. The results show that the nitrate removal rate and bacterial community structure are better in the sodium thiosulfate group compared to the elemental sulfur group. This research provides an experimental basis for improving the start-up time and operating cost of sulfur autotrophic denitrification systems and offers new prospects for further mechanistic analysis.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Zhufan Lin, Shaoan Cheng, Zhen Yu, Jiawei Yang, Haobin Huang, Yi Sun
Summary: This study investigated an anode-cathode polarity inversion method to rapidly cultivate high-performance nitrate-reducing bio-cathode and found a correlation between the oxidation performance and the reduction performance. The bioelectrode with high bio-anodic bio-oxidation electroactivity achieved a significantly higher nitrate removal rate compared to the bioelectrode with low bio-oxidation electroactivity. The findings provide a novel strategy for enhancing bio-cathodic nitrate removal performance and have potential implications for the development of bio-cathodes with specific functions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Na Li, Yong Li, Ruitao Lou, Hong Xu, Laraib Saeed
Summary: This study analyzed the effects of Fe(II) and organic carbon on nitrate reduction processes in lake sediments. The results showed that Fe(II) greatly promoted nitrate reduction at high temperatures, while the reduction rate decreased at low temperatures. The presence of organic carbon in sediments also influenced the nitrate reduction processes. Overall, the combination of Fe(II) and organic carbon played a significant role in nitrate reduction and nitrogen removal in lake systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Civil
Hyejung Jung, Yun S. Kim, Jisu Yoo, Bumsung Park, Jeonghoon Lee
Summary: A multi-isotopes approach combining stable nitrate isotopes (delta N-15(NO3) and delta O-18(NO3)) with stable water isotopes (delta O-18(H2O) and delta H-2(H2O)) can help identify nitrogen sources and understand transformation processes in river water systems. Seasonal variations have a significant impact on stable isotope values, leading to uncertainties in estimating the contribution of effluent to the water system.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Jiannan Li, Yujie Feng, Ye Qiu, Dahong Chen, Dandan Liang, Jiajie Zhou, Guohong Liu
Summary: The feasibility of using agricultural waste corncob as a low-cost carbon source for efficient denitrification in wastewater treatment plants (WWTPs) was investigated. Results showed that the denitrification rate of corncob was similar to that of traditional carbon source sodium acetate. When corncob was used in a microbial electrochemical system (MES), the release of corncob carbon sources was well controlled, resulting in improved denitrification rate. The combination of autotrophic and heterotrophic denitrification using corncob as the sole carbon source offers a promising and cost-effective approach for nitrogen removal in WWTPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Malama Chisanga, Howbeer Muhamadali, Danielle McDougall, Yun Xu, Nicholas Lockyer, Royston Goodacre
Summary: This study utilized Raman and FT-IR spectroscopy combined with SIP to measure 13C carbon incorporation rates and unravel microbial metabolism and interactions. The findings demonstrated the feasibility of identifying metabolic kinetics and interactions within microbial consortia using these techniques.
Article
Environmental Sciences
Shengjie Li, Zhuo Jiang, Guodong Ji
Summary: The fate of nitrogen is influenced by competition between nitrate reduction pathways, with denitrification removing nitrogen to the atmosphere and DNRA retaining nitrate as ammonia. This study explored the impact of five sulfur forms as electron donors on nitrate fate. The results showed that thiosulfate had the highest nitrate reduction rate, stimulating denitrification and inhibiting DNRA. Elemental sulfur, on the other hand, stimulated both denitrification and DNRA. Metagenomic analysis revealed links between sulfur sources, nitrate reduction pathways, and microbial populations.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Hong Liu, Wei Zeng, Zhiwei Fan, Jianmin Li, Mengjia Zhan, Yongzhen Peng
Summary: Fe was investigated for its impact on sulfur autotrophic denitrification coupled to heterotrophic denitrification, and by adjusting substrate ratios, the efficiency of nitrogen removal was enhanced. Different substrate ratios promoted the coexistence of autotrophic and heterotrophic bacteria, which cooperated with Fe minerals to improve nitrogen removal.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Seung-Hee Kim, Dong-Hun Lee, Min-Seob Kim, Han-Pil Rhee, Jin Hur, Kyung-Hoon Shin
Summary: In this study, an integrated framework was validated to effectively manage nitrate loading in complex river systems through quantitative estimation of nitrate sources. The isotopic compositions of nitrates showed different ranges among land-use types, reflecting different nitrate sources within watersheds. Hydrological conditions, such as water discharge, partially controlled total nitrate loads. Sewage transport near urban boundaries showed unique enhancement and increased total nitrate load in downstream areas. The isotopic and model-based nitrate fluxes showed good correlation for urban sources but poor correlation for agriculture-dominated land use.
Article
Environmental Sciences
Binghan Xie, Heng Liang, Hong You, Shihai Deng, Zhongsen Yan, Xiaobin Tang
Summary: This study investigated the degradation of SMX and the response of microbial communities to different initial concentrations of SMX in MFCs. It was found that the highest SMX removal efficiency was achieved at 5 mg/L, while high concentration of SMX inhibited electron transfer. The 16S rRNA high-throughput sequencing revealed significant shifts in anode biofilm communities with different initial SMX concentrations in MFCs.
Article
Engineering, Environmental
Shihai Deng, Lakshmi Jothinathan, Qinqing Cai, Rui Li, Mengyuan Wu, Say Leong Ong, Jiangyong Hu
Summary: Phenolic compounds are common contaminants in industrial effluents. A study developed a combined catalytic microbubble ozonation and biological process for efficient treatment of industrial phenolic wastewater. The FeOx@GAC catalyst showed significantly higher catalytic activity in microbubble ozonation for phenolic wastewater treatment, with an improvement in both TOC removal and phenolic compounds degradation. The study also evaluated different biological treatment processes and found that the combined O-3/FeOx@GAC-MBR process achieved high COD removal and phenolic compounds degradation efficiency.
Article
Agricultural Engineering
Dongle Cheng, Huu Hao Ngo, Wenshan Guo, Soon Woong Chang, Dinh Duc Nguyen, Shicheng Zhang, Shihai Deng, Ding An, Ngoc Bich Hoang
Summary: This review discusses the importance and challenges of microbial electrolysis cell (MEC) systems in biohydrogen production. The paper explores the factors influencing biohydrogen production and proposes new strategies and directions to improve efficiency and reduce costs.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shihai Deng, Qi Wang, Qinqing Cai, Say Leong Ong, Jiangyong Hu
Summary: Micro-scale ZVI@GAC-based iron-carbon galvanic cells were successfully developed and applied to treat bio-refractory industrial wastewater. The results showed that the addition of ZVI@GACs improved organic degradation and phenolic compound destruction in the MBR system. Furthermore, ZVI@GACs reduced bio-toxicity, prolonged membrane fouling cycle, and reduced sludge accumulation.
Article
Engineering, Environmental
Shihai Deng, Shuai Peng, Hun Hao Ngo, Sam Jin-An Oh, Zhifeng Hu, Hong Yao, Desheng Li
Summary: The accumulation of nitrous oxide (N2O) and nitrite (NO2-) in iron-driven autotrophic denitrification (ADN) processes remains unclear. This research systematically characterized the N2O/NO2- accumulation in Fe(0)-/Fe(II)-ADN processes through investigating the mechanisms, impact factors, and molecular biological characteristics.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Shuai Peng, Longqian Xu, Shihai Deng, Yunfeng Mao, Zhenyu Zhao, Deli Wu
Summary: Solar-driven evaporation technology provides a green solution for water scarcity. This study introduces an unconventional solar evaporative modulator material called DPH, which improves light absorption, thermal localization, and water activation. The DPH-based ultra-thin hydrogel membrane achieves high light absorption, water evaporation, and salt-resistant evaporation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Jie Han, Chaoqi Wang, Shihai Deng, Eric Lichtfouse
Summary: About one tenth of humans are impacted by water shortages around the globe, worsened by climate change-induced weather extremes. China has battled with water shortages and floods for decades and developed the concept of sponge cities in the early 2010s to mitigate these issues. Sponge cities integrate natural, green infrastructure into urban drainage systems to absorb, store, and purify rainwater. Several case studies in China demonstrate the potential of sponge cities for green urbanization and ecological restoration.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Environmental Sciences
Liping Liu, Xue Zhang, Puqi Jia, Shanshan He, Han Dai, Shihai Deng, Jie Han
Summary: This study reveals the release of micro-sized and submicron-sized particles, floccules, and fragments during the use of commercially available single-use breastmilk storage bags. The majority of these particles were identified as polyethylene, polyethylene terephthalate, and nylon-6. Infants were estimated to ingest 0.61-0.89 mg/day of microplastics and other particles from the use of these bags.
ENVIRONMENTAL POLLUTION
(2023)
Review
Agricultural Engineering
Shihai Deng, Chaoqi Wang, Huu Hao Ngo, Wenshan Guo, Na You, Hao Tang, Hongbin Yu, Long Tang, Jie Han
Summary: This paper reviews and discusses state-of-the-art microbial electrochemical technologies (METs) for resource recovery from wastewater, with a focus on microbial fuel cells (MFCs), microbial electrolysis cells (MECs), and microbial recycling cells (MRCs). MRCs show the greatest potential for simultaneous nutrient recovery and efficient mineral recovery at a larger scale. METs are effective in energy conversion but face limitations and challenges. Future research should consider material lifespan, reduction of secondary pollutants, and scaled-up benchmark systems.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhifeng Hu, Hong Yao, Shihai Deng, Chao Zhang, Shuai Peng, Zhongguo Zhang, Desheng Li
Summary: A vertical flow constructed wetland based on Iron [Fe (0)]-carbon micro-electrolysis (IC-ME) (IC-CW) was developed for advanced treatment of reclaimed water. The performance of IC-ME carrier on simultaneous N and P removal under different operational conditions and cold temperature was investigated. The developed IC-CW presented significant potential in the practical application for advanced treatment of reclaimed water.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Environmental Sciences
Han Dai, Hao Tang, Wen Sun, Shihai Deng, Jie Han
Summary: Since the outbreak of the novel coronavirus disease in late 2019, almost 650 million people have been infected worldwide, with over 6.6 million deaths. Despite effectively controlling the first wave of infections in mainland China, with no domestic cases for 56 consecutive days since April 16, 2020, new outbreaks emerged in multiple Chinese cities after cases were found in the Xinfadi Market in Beijing on June 11, 2020. Epidemiological investigations revealed that more than twenty re-emergent outbreaks were caused by fomite transmission via imported frozen and chilled foods contaminated with the SARS-CoV-2 virus. To address this, China established a traceable cold-chain food system and reinforced customs inspections as emergency responses.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Na You, Shihai Deng, Chaoqi Wang, Huu Hao Ngo, Xiaowei Wang, Hongbin Yu, Long Tang, Jie Han
Summary: This paper reviews the development of microalgal processes for resource recovery from wastewater, including microalgal species screening, configuration, biotic consortia construction, infection avoidance, nutrients balancing, operational parameter optimization, and biomass harvesting enhancement. The lack of literature on practical applications results in insufficient economic and environmental feasibility assessments for the microalgal process. Therefore, life cycle assessments are needed to evaluate the upscaled microalgal processes from the perspective of circular economy and carbon neutrality. Efforts are suggested to establish utilization guidelines, advanced recommendations, reliable standards, and proper safety evaluation criteria to promote the upscaled application and successful implementation.
Editorial Material
Environmental Sciences
Shihai Deng, Jiangyong Hu, Say-Leong Ong, Qilin Li, Jie Han
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Review
Engineering, Environmental
Lijuan Deng, Wenshan Guo, Huu Hao Ngo, Xinbo Zhang, Dong Wei, Qin Wei, Shihai Deng
Summary: This review presents the latest developments in catalytic upcycling of polymer wastes, including high-temperature and low- to intermediate-temperature approaches. Diverse value-added products are obtained from these methods.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Weiwei Ma, Zhen Cao, Xueqing Shi, Shi-Hai Deng, Han Dai, Binghan Xie
Summary: A novel microalgal-bacterial symbiosis (MABS) system using Fe-0/C galvanic cells was established for anaerobic digestion effluent (ADE) treatment. The Fe-0/C-MABS system showed high removal efficiencies for COD, TN, and TP. Fe-0/C facilitated microalgal growth, enhanced the structural stability of microalgal-bacterial consortium, and supported autotrophic denitrification and phosphate precipitation, leading to improved TN and TP removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)