Article
Engineering, Environmental
Shiyi Liu, Yu Xiang, Tengzhi Zhou, Haiyuan Ma, Zhiyu Shao, Hongxiang Chai
Summary: Recent studies have focused on the TDDA process for treating wastewater containing ammonium and nitrate. By operating two different-sized reactors, it was found that bigger aggregates provided nitrite more efficiently for anammox process, resulting in higher nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Bingbing Ma, Xiaojing Zhang, Aihua Gao, Chuang Ma, Yulin Hou, Zirui Zhao, Hao Hu
Summary: The CANON process was utilized for treating composting wastewater, resulting in decreased ammonia levels and increased total nitrogen removal rate. Microorganisms secreted more extracellular polymeric substances to counteract cell damage caused by harmful substances, maintaining system stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Kehuan Guo, Wenxuan Li, Yae Wang, Tongyao Hao, Feijian Mao, Te Wang, Zhenni Yang, Xinjuan Chen, Jie Li
Summary: The application of Anammox technology combined with biological iron and iron bacteria in an iron sludge system was successfully started and stably operated, achieving efficient and stable nitrogen removal. Feammox and NOx-dependent Fe(II) oxidation made some contributions to TIN removal, but Anammox remained the primary nitrogen transformation pathway.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biotechnology & Applied Microbiology
Peike Gao, Yu Gao, Hongbo Wang, Ting Ma, Ji-Dong Gu
Summary: This study identifies the presence of anammox bacteria in oil reservoirs and suggests that they are more easily detected in the downhole of water-injection wells. These bacteria, along with other bacteria, participate in the nitrogen cycle in oil reservoirs and potentially reduce externally injected nitrate through the production of N2O and N2. This research improves our understanding of anammox bacteria detection and highlights their roles in the nitrogen cycle in oil reservoirs.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Agricultural Engineering
Huan Li, Teng Cai, Yijing Gao, Qicai Dai, Xinyu Liu, Xue Chen, Xueqin Lu, Guangyin Zhen
Summary: An upflow blanket filter (UBF) reactor with porous fixed cylinder carriers was used to investigate the formation mechanism of anammox granules. The UBF achieved the highest nitrogen removal efficiency of 93.19 +/- 3.39% at a nitrogen loading rate of 3.6 kg-N/m3/d and HRT of 2 h. Tryptophan-like proteins were found to be vital for granule formation, and the analysis of 16s rRNA revealed the important role of SBR1031 in cell aggregation. The anammox granules developed a two-layered spatial structure consisting of an outer-layer of ammonia oxidizing bacteria and an inner-core of anaerobic ammonia oxidizing bacteria. Introduction of porous fixed cylinder carriers effectively prevented biomass loss and flotation.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Victor Guzman-Fierro, Jose Sanhueza, Constanza Arriagada, Luis Pereira, Victor Campos, Juan Jose Gallardo, Marlene Roeckel
Summary: The study showed a direct association between specific nitrification activity (SNA) and the specific surface of granules, highlighting the importance of the outer layer in the nitrification process. Furthermore, specific anammox activity (SAA) varied when faced with real industrial and synthetic substrates, with SAA increasing at higher diameter ranges in industrial wastewater. Granular sedimentation rate could be used as a routine technique for controlling and starting up PN-A reactors, with organic matter potentially beneficial for granular sludge stability and nitrogen removal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Maria Teresa Santos, Pedro Andre Lopes
Summary: The industrial sector produces large amounts of sludge, which can be treated and recovered using various methods. Through experiments, it was found that anaerobic co-digestion followed by the production of heterogeneous catalysts for biodiesel production is the most promising method.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Biotechnology & Applied Microbiology
Shelly Verma, Achlesh Daverey, Jih-Gaw Lin
Summary: The study successfully started anammox process in a sequencing batch reactor using a mixture of conventional activated and anaerobic sludge as inoculum, achieving efficient nitrogen removal. Analysis of sludge samples revealed the dominance of an uncommon anammox bacterial genus Candidatus Jettenia in the reactor, with other phyla such as Chloroflexi, Proteobacteria, and Bacteriodetes also detected. The results of this study have important implications for future applications.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2021)
Article
Environmental Sciences
Yahua Wang, Ying Meng, Fubo Luan
Summary: This study achieved high loading start-up and rapid loading increase in an up-flow anaerobic sludge bed reactor using anammox granules. The loading rapidly reached 38.0 kg-N m(-3) day(-1) within 44 days. The study also provides a potential strategy for obtaining superior anammox granules with robust removal efficiency.
WATER AIR AND SOIL POLLUTION
(2023)
Review
Engineering, Environmental
Shaoyi Xu, Xiaolong Wu, Huijie Lu
Summary: This review discusses the roles of nitrogen-cycling microorganisms in wastewater treatment, focusing on often overlooked microbes that are functionally important. Advancements in molecular technologies have enabled comprehensive studies on the application and potential of these microbes in nitrogen removal processes in wastewater treatment plants.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
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.
Review
Environmental Sciences
Anna Christine Trego, Simon Mills, Gavin Collins
Summary: Anaerobic digestion is recognized as a sustainable method for waste management, producing methane-rich biogas. Different specialized granules, including anaerobic and aerobic granules, have opened up new opportunities in wastewater treatment and resource recovery biotechnology. Each type of granule has unique characteristics, biochemical processes, and microbial community compositions.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Jonathan A. C. Roques, Federico Micolucci, Suguru Hosokawa, Kristina Sundell, Tomonori Kindaichi
Summary: Recirculating aquaculture systems (RAS) are promising for sustainable aquaculture development, but nitrogenous waste accumulation is a limitation. The anammox process shows potential for treating marine wastewater, with marine anammox bacteria Candidatus Scalindua as a promising candidate. However, anammox activity is affected by unknown compounds in RAS wastewater and/or sub-optimum trace elements content, and TE supplementation can help recover activity. Future studies need to identify the unknown factors and determine specific TE requirements for optimal RAS wastewater treatment by Candidatus Scalindua.
Article
Agricultural Engineering
Yanxu Liu, Wen Liu, Yu-You Li, Jianyong Liu
Summary: Layered inoculation of anaerobic digestion and anammox granular sludges can lead to rapid start-up of anammox, with increased nitrogen loading rate and nitrogen removal rate. The study found that AD granular sludge exhibited anammox activity and could be cultured into anammox granular sludge for accelerated reactor start-up. Adsorption, interception, and domestication enhanced the biomass of anammox bacteria, addressing slow start-up issues in industrial applications.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Huarong Yu, Ling Zhong, Zhaorui Chu, Guirong Wu, Haiyang Yang, Hongwei Rong, Fangshu Qu
Summary: In this study, the effect of exogenous boron on the start-up of the anaerobic ammonium oxidation (anammox) process was investigated. It was found that the addition of boron significantly increased the total nitrogen conversion rate and promoted granulation in the system. Additionally, boron elevated the AI-2 concentration and affected the microbial community, leading to higher abundances of anammox bacteria and Anaerolineaceae.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Environmental Sciences
Mohammed Awad, Zhe Tian, Ziming Han, Xiao Luan, Yu Zhang, Min Yang, Liping Dong
Summary: This study investigated the effects of thermally treated oxytetracycline fermentation residue (OFR) on the dissemination of antibiotic resistance in soil and plant tissue. The results showed that the treated OFR can be used as an organic fertilizer without promoting antibiotic resistance in the soil and plant tissue.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Chemistry, Multidisciplinary
Lili Zhang, Zhiqiang Wang, Tong Li, Chun Hu, Min Yang
Summary: Ultrathin Bi4O5Br2 nanosheets with about a 10 nm thickness were successfully synthesized by in situ intergrowth with Bi2O2CO3 sheets at room temperature. The significantly enhanced charge separation and transfer by surface oxygen vacancies on the ultrathin nanosheets, and the facilitated adsorption-degradation process at the solid-liquid micro-interface were confirmed to contribute to the superior catalytic activity. The developed catalyst showed a greatly increased degradation rate of organic pollutants under a visible LED, and exhibited stability and potential for practical application.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Environmental Sciences
Md Suruzzaman, Tengxin Cao, Jinping Lu, Yongjing Wang, Ming Su, Min Yang
Summary: A novel RT-qPCR method based on detecting the MIB synthesis gene was proposed to evaluate the MIB-producing potential in source water, showing a wider coverage than previous primer sets. The method was efficient, with proven amplification efficiency, LOD, and LOQ, and was further verified in field samples, suggesting its potential as an alternative warning tool for assessing MIB problems in source water.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Guiwei Li, Yuliang Su, Bin Wu, Guohang Han, Jianwei Yu, Min Yang, Baoyou Shi
Summary: This study investigates the processes of microbial-mediated Mn(II) oxidation and deposit formation in pipeline loops. The results show that it takes 20 days for the microbial oxidation and deposition to be initiated in new pipes continuously receiving Mn(II). The accumulation of deposits accelerates once started. Without oxygen, Mn(II) rapidly decreases through adsorption to deposits. Compared to no Mn condition, the input of Mn(II) results in a significant increase in biofilm formation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Ziming Han, Haodi Feng, Xiao Luan, Yunpeng Shen, Liren Ren, Liujie Deng, D. G. Joakim Larsson, Michael Gillings, Yu Zhang, Min Yang
Summary: This study investigated the treatment of erythromycin fermentation residue (EFR) and evaluated the potential risk of long-term soil application of treated EFR on the development of environmental antibiotic resistance. The results showed that the treatment effectively removed bacteria and DNA, and reduced the residual concentration of erythromycin. However, the application of treated EFR to soil led to changes in the abundance and diversity of antibiotic resistance genes and bacterial community composition.
Article
Agricultural Engineering
Dong Xie, Min Yang, Mingyue Xu, Jie Meng, Chuanfu Wu, Qunhui Wang, Shu Liu
Summary: This study found that adding nitrogen-rich wastewater during composting can increase the total nitrogen content of fertilizer and reduce CO2 and NH3 emissions, thereby avoiding incomplete decomposition of organic nitrogen.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Min Yang, Jamison Watson, Zixin Wang, Buchun Si, Weizhong Jiang, Bo Zhou, Yuanhui Zhang
Summary: Two-stage fermentation is proposed as an enhancement of mainline single-stage anaerobic digestion, but it is still in its early stages. Recent developments have provided a new perspective for understanding and designing two-stage systems, which have been analyzed in terms of energy recovery, organics conversion, and metabolic networks.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Environmental
Ming Zhu, Binghui Tian, Sheng Luo, Yongzhi Chi, Dierxiati Aishajiang, Yu Zhang, Min Yang
Summary: In this study, a BMED-5 system was established to simultaneously produce (NH4)2SO4, HCl, and NaOH from waste Na2SO4. The optimization of energy efficiency and conversion ratio of the BMED-5 system was investigated, and high product concentrations and conversion ratios were achieved.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Environmental Sciences
Haodi Feng, Mei Tang, Ziming Han, Xiao Luan, Chunmeng Ma, Min Yang, Jiuyi Li, Yu Zhang
Summary: An accurate analytical method was developed to quantify erythromycin A, byproducts, and hydrolysis or biodegradation products in erythromycin fermentation residue (EFR) and amended soil. The method achieved effective extraction and high recoveries for all analytes. EFR, treated EFR, and amended soils were analyzed, and several analytes were detected. The method was useful for evaluating the potential risk of erythromycin A byproducts and transformation products in the environment.
Article
Environmental Sciences
Jinyi Qin, Jiao Fang, Fei Gao, Yiwen He, Ming Su, Yu Zhang, Min Yang
Summary: This study investigated the treatment of Ethinyl Estradiol (EE2) in swine wastewater using an Upstream Solids Reactor (USR), and proposed a new method for bio-feeding regulation to enhance the anaerobic biodegradation process. The addition of propionic acid was found to be more effective in enhancing the removal of EE2 compared to lactic acid. However, controlling the pH at extreme values hindered the fermentation process and negatively affected EE2 removal. The study provides insights into the anaerobic biodegradation of EE2 and suggests a new strategy for the bioremediation of refractory pollutants.
Article
Environmental Sciences
Ming Su, Jiao Fang, Zeyu Jia, Yuliang Su, Yiping Zhu, Bin Wu, John C. Little, Jianwei Yu, Min Yang
Summary: Cyanobacteria can adjust their photosynthetic pigments to sense different light colors. Some filamentous cyanobacteria increase their phycoerythrin (PE) levels in green light, leading to extensive odor problems in drinking water reservoirs. This study found a correlation between MIB biosynthesis and chromatic acclimation (CA) induced by ambient light color in a MIB-producing Pseudanabaena strain. Pseudanabaena regulates pigment proportion through CA3, increasing PE and decreasing phycocyanin (PC) in green light. MIB production and chlorophyll a (Chl a) biosynthesis are positively correlated regardless of light color.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Wenli Fan, Guangxi Sun, Qi Wang, Fan Yang, Yingxin Gao, Min Yang
Summary: This study investigated the role of activated carbon properties in the adsorption of effluent organic matter (EfOM) from bio-treated coking wastewater. Commercial powdered activated carbons (PACs) with different pore structures, surface functional groups, and surface charges were used. The results showed that the adsorption of EfOM depended on its molecular size, with biopolymers being adsorbed by macropores and humics being adsorbed by mesopores. PACs with higher mesopore volume, fewer acidic groups, and higher isoelectric point were found to be more effective in removing EfOM.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Tengxin Cao, Jiao Fang, Zeyu Jia, Yiping Zhu, Ming Su, Qi Zhang, Yichao Song, Jianwei Yu, Min Yang
Summary: Cellular 2-methylisoborneol (MIB) yield in cyanobacteria varies under different conditions, making MIB prediction ineffective. Through a field survey, we found that mic gene abundance and expression could serve as indicators for early warning of MIB production. Light intensity was identified as the key regulator for mic gene expression and MIB synthesis. We developed a model using mic gene abundance as an indicator for MIB prediction, which was verified in other reservoirs.
Article
Engineering, Environmental
Qiang Li, Lei Wang, Yingting Jia, Min Yang, Haifeng Zhang, Jianying Hu
Summary: Exposure to environmental endocrine-disrupting chemicals (EDCs) can cause extensive health issues. In this study, potential estrogen receptor alpha (ER alpha)-active compounds in the source and drinking water of major rivers in China were identified using an ER alpha protein affinity assay and high-resolution mass spectrometry. Fifty-one potential ER alpha-active compounds across 13 categories were identified, including a compound with antiestrogenic activity and three plausible ER alpha ligands. The study also revealed the presence of 12 compounds in the aquatic environment for the first time.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinming Shen, Qiang Li, Wenxin Hu, Min Yang, Wei An, Jianying Hu
Summary: This study reveals that drinking water from six major cities in China can significantly promote foam cell formation in atherosclerosis, and chemicals in the water may play a role in this process by antagonizing liver X receptor alpha.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Shaofeng Zhou, Wenwen An, Cuifen Gan, Meiying Xu
Summary: Bacteria generate and release extracellular reactive oxygen species (eROS), which significantly contribute to the natural ROS pool and play a crucial role in metabolic interactions of bacteria with their environment. Understanding the behavior of eROS-generating bacteria and its environmental implications is of great importance in the cycling of biogeochemical elements, transformation of organic matter, and regulation of antibiotic resistance genes.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Ji-Dong Gu, Tim Ford, Bryce Mitton, Ralph Mitchell
Summary: Plastics and microplastics are widely present and accumulating in the environment, leading to increasing public attention. In addition to packaging plastics, materials from industries such as electronics, space and aviation are also accumulating, but receiving less attention. The production of degradable and biodegradable plastics is seen as a way to reduce environmental impacts, but enhancing the non-degradability of functional polymers is also a feasible option. Microbial colonization and deterioration pose significant challenges to these materials.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Justyna Bohacz, Michal Mozejko
Summary: This study evaluated the keratinolytic activity of 37 strains of Trichophyton ajelloi and found that pigmented strains isolated from loamy soil were more efficient in degrading native feather keratin, while non-pigmented strains isolated from chernozem showed better abilities. The keratinolytic activity increased over time, as evidenced by the increase in extracellular keratinase activity and release of soluble proteins and peptides. Protease activity peaked in the first 7 days and again on day 28 of culture. The release of ammonium and sulfate ions, associated with an increase in pH, reached its maximum on day 21. Three pigment-producing strains were among the most active in releasing large amounts of ammonium and sulfate ions. The biodegradation of feather waste by Trichophyton ajelloi strains can be used to produce fertilizers suitable for plants with high sulfur requirements.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Joseph M. Suflita, Brenda J. Little
Summary: This article reviews the major achievements of the International Biodeterioration & Biodegradation Society (IBBS) on its 50th anniversary and provides recommendations for addressing new challenges and developments based on personal experiences.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Zhenyan Lin, Tuo Jin, Xin Xu, Xiao Yin, Dan Zhang, Mengjiao Geng, Chunyu Pang, Gongwen Luo, Lizhi Xiong, Jianwei Peng, Jiangchi Fei
Summary: The incomplete recycle of residual mulch film (RMF) in recent years has led to an increase in plastic fragments in soil, posing a serious threat to the soil ecological environment. In this study, seven potential plastic-degrading microorganisms were screened and identified from film-mulched vegetable fields. The degradation ability experiments showed that both single strains and mixed strains demonstrated varying levels of degradation of RMF.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Tiina Belt, Michael Altgen, Muhammad Awais, Martin Nopens, Lauri Rautkari
Summary: This study investigated the degradation of heat-treated wood by brown rot fungi and found that the decay increased the hygroscopicity of wood in the decaying state. Furthermore, it was observed that heat-treated samples were more susceptible to fungal decay compared to untreated samples, which may be related to the increase in moisture content.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Marta Cicardi, Davide Bernasconi, Luca Martire, Linda Pastero, Giulia Caneva, Sergio E. Favero-Longo
Summary: This study investigated the phenomenon of Centimetric circular areas Uncolonized by Microbial Biofilms (CUMBs) on natural and heritage stone surfaces. The analysis revealed a compatibility in distribution and size between CUMBs and lichen thalli, suggesting a lichen origin for some CUMBs. Microscopic analysis also showed similar modifications in marble layers beneath CUMBs and lichens, indicating a possible alteration of stone properties by lichens.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
