Article
Agricultural Engineering
Yuren Wang, Min Deng, Biqing Li, Lu Li, Yoong-Sin Oon, Xiaoli Zhao, Kang Song
Summary: A novel strain Pseudomonas sp. YR02, capable of N2O reduction under aerobic conditions, was isolated and shown to have complete denitrification ability. The strain has the potential to efficiently remove inorganic nitrogen and mitigate N2O emissions in wastewater treatment plants.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiaochuan Ran, Xinyi Zhang, Bin Zhao, Qiang An
Summary: This study investigates the dual effect of nitrate on AGS granulation and finds that nitrate feeding can initially promote granulation, but it inhibits granulation in the long-term. The study also provides evidence for the role of microbial factors related to denitrification and EPS production in the dual effect of nitrate. This research highlights the potential effects of nitrate on aerobic granulation, providing references for its utilization in nitrate-containing wastewater.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Agricultural Engineering
Pei Hong, Keyin Yang, Yilin Shu, Bangding Xiao, Hailong Wu, Yunyun Xie, Yali Gu, Fangping Qian, Xingqiang Wu
Summary: By studying three aerobic denitrifiers with dual-capacities of strong auto-aggregation and high nitrogen removal efficiency, efficient nitrogen-rich wastewater treatment in a sequencing batch biofilm reactor was achieved. The coaggregation strains successfully colonized in the bioreactor and demonstrated a strong tolerance to high nitrogen concentrations, contributing to efficient inorganic nitrogen removal and biofilm formation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Marcos Sales, Talita Marinho, Idayana C. Marinho, Savia Gavazza, Mario T. Kato, Bruna S. Magnus, Lourdinha Florencio
Summary: In this study, start-up strategies for developing conventional aerobic granular sludge (AGS) and algal aerobic granular sludge (AAGS) (photogranules) were investigated. The results showed that AAGS had better stability and larger diameter, while AGS had a higher abundance of extracellular polymeric substances producing organisms. Variation in feeding time affected the biomass composition, with a 60-min feeding period resulting in higher nitrogen removal efficiency and more compact granules.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Chen Wang, Wei Wei, Xiaohu Dai, Bing-Jie Ni
Summary: The effects of zero-valent iron (ZVI) on aerobic sludge digestion were studied, and it was found that ZVI greatly enhanced sludge degradation, nitrogen removal, and sludge dewaterability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Chuan-Shu He, Rong-Rong Ding, Jia-Qi Chen, Guan-Nan Zhou, Yang Mu
Summary: The study found that NOMs can promote the reduction of DTA by ZVI, thus increasing the consumption of Fe-0 and enhancing the removal rate of DTA.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yuantao Wang, Shenghua Zhang, Huixia Jin, Jiwei Chen, Ketao Zhou, Jinxi Chen
Summary: Dam construction is a major disturbance in aquatic ecosystems, leading to increased N2O emissions. This study investigated the effects of dams on N2O producers and reducers in river sediments. The results showed that sediments in the transitional zone of dammed rivers are critical for N2O emission potential, with different rates in winter and summer. The dominant N2O-producing microorganisms were nirS-harboring bacteria, while N2O-reducing bacteria harbored nosZ I. The study also revealed the importance of nosZ II-containing microbial groups in reducing N2O emissions from dammed river sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Victory Fiifi Dsane, Haejun Jeon, Yuri Choi, Sohee Jeong, Younggyun Choi
Summary: Magnetite is an iron-rich carrier that can enhance the activity and aggregation of anammox bacteria. In this study, different-sized samples from a granulation reactor were used, and it was found that larger granules had higher iron content and improved microbial cell density. The specific anammox activity increased with granule size, and the heme c content was also higher in larger granules. The extracellular polymeric substances (EPS) analysis showed differences in secretion intensity and protein structures among the different sizes. The relative abundance of Brocadia Sinica also increased with granule size. This study highlights the importance of in-depth EPS analysis beyond traditional yield and major content analysis.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biodiversity Conservation
Xiaoxuan Su, Teng Wen, Yingmu Wang, Junshi Xu, Li Cui, Jinbo Zhang, Ximei Xue, Kai Ding, Yijia Tang, Yong-guan Zhu
Summary: The study demonstrated that acidification stimulates N2O release from estuarine sediments, mainly mediated by bacterial denitrification; in neutral environments, N2O production is dominated by fungi. The contribution of chemo-denitrification to N2O production cannot be ignored, but is not significantly affected by acidification.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Agricultural Engineering
Mengya Yang, Mingyue Yin, Yaoqi Zheng, Jishuang Jiang, Caixu Wang, Shuang Liu, Lilong Yan
Summary: The coexistence of multiple pollutants is a distinct feature of water pollution. This study analyzed the efficiency of strain XS-18 in removing nitrate and tetracycline (TC) and investigated the mechanism of TC tolerance and removal. The findings showed that XS-18 could efficiently remove TC through extracellular polymeric substance and cell surface adsorption, and its auto-aggregation ability could be improved by the secretion of polysaccharides and hydrophobic proteins stimulated by TC.
BIORESOURCE TECHNOLOGY
(2022)
Article
Soil Science
Matthew P. Highton, Lars R. Bakken, Peter Dorsh, Lars Molstad, Sergio E. Morales
Summary: Soil denitrification contributes to N2O emissions, and the delayed reduction of N2O in certain soils can be attributed to delayed N2O reductase synthesis and impairment of N2O reduction by nitrite.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Biotechnology & Applied Microbiology
Dan Qing Wu, Xue Song Ding, Bin Zhao, Qiang An, Jin Song Guo
Summary: The auto-aggregation ability of strain XL-2 in wastewater treatment was found to be mainly due to the self-secretion of extracellular polymeric substances (EPS), specifically the hydrophobic interaction within EPS. The proteins in tightly bound EPS (TB-EPS) were found to have a high proportion of hydrophobic carbon-containing functional groups, which may derive from the hydrophobic R groups of amino acids. This study provides insights into the underlying mechanisms of auto-aggregation by strain XL-2, contributing to the understanding of microbial aggregates formation and potential applications in wastewater treatment.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2022)
Article
Environmental Sciences
Ting Peng, Yaying Wang, Jiaqin Wang, Fang Fang, Peng Yan, Zhiping Liu
Summary: This study investigated the characteristics of three forms of extracellular polymeric substances (EPS) and their component proteins (PN) and polysaccharides (PS) during the granulation process of aerobic granular sludge (AGS) and their effects on the aggregation performance of AGS. The results showed that tightly bound EPS (TB-EPS) played a critical role in the formation of AGS, with PN being the major contributor to promoting the formation of AGS and enhancing its aggregation performance.
Article
Food Science & Technology
Robina Taj, Tariq Masud, Asma Sohail, Shehla Sammi, Rooma Naz, Bal Kumari Sharma Khanal, Malik Adil Nawaz
Summary: This study evaluated the probiotic potential of S. thermophilus strains isolated from Dahi sold in the local markets of Rawalpindi and Islamabad, Pakistan. The study found that these strains could produce exopolysaccharide (EPS), exhibited probiotic functions, inhibited L. monocytogenes, and were sensitive to clinical antibiotics. Therefore, these strains have potential as candidates for biostabilizers in consumer-friendly fermented probiotic milk products.
FOOD SCIENCE & NUTRITION
(2022)
Article
Engineering, Environmental
Nouran T. Bahgat, Philipp Wilfert, Leon Korving, Mark van Loosdrecht
Summary: The study assessed the recovery of phosphorus, nitrogen, methane, and extracellular polymeric substances (EPS) from aerobic granular sludge (AGS) wastewater treatment plants. About 30% of sludge organics are recovered as EPS and 25-30% as methane via alkaline anaerobic digestion (AD). It was found that a significant portion of phosphorus and nitrogen are present in EPS and can be recovered through chemical precipitation. Ammonium recovery is feasible from the AD centrate due to its high concentration.
Article
Engineering, Environmental
Oscar Omondi Donde, Stanley M. Makindi, Cuicui Tian, Yingying Tian, Pei Hong, Qijia Cai, Tiantian Yang, Chunbo Wang, Xingqiang Wu, Bangding Xiao
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Environmental Sciences
Yingying Tian, Oscar Omondi Donde, Cuicui Tian, Bing Feng, Xingqiang Wu, Bangding Xiao
Summary: The study investigated the performance of R. palustris Strain PUF1 under different NH4-N gradients, finding that high concentrations inhibited bacterial growth while lower concentrations allowed for recovery of pigment synthesis. A threshold of 1.0 g/L NH4-N was recommended for optimal biomass production and nutrient sequestration from cyanobacterial feedstock. Low NH4-N treatments also resulted in more diverse bacterial communities and excess NH4-N reduced phosphorus sequestration by PUF1s.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2021)
Article
Environmental Sciences
Xingqiang Wu, Yehudit Viner-Mozzini, Yunlu Jia, Lirong Song, Assaf Sukenik
Summary: Alkyl-trimethylammonium (ATMA) surfactants, such as octadecyltrimethylammonium (ODTMA) bromide, act as cyanocides that efficiently inhibit cyanobacteria growth, with green algae being less affected by these compounds.
Article
Biotechnology & Applied Microbiology
Pei Hong, Yanlin Huang, Minglin Chen, Bangding Xiao
Summary: Strain LK-618, identified as Pseudomonas sihuiensis, showed high nitrogen removal efficiencies for nitrate, ammonium, and nitrite when using trisodium citrate as a carbon source. Response surface methodology analysis revealed the optimal Total Nitrogen removal ratio for strain LK-618, indicating its potential application in saline wastewater treatment. The strain could tolerate up to 20 g/L NaCl concentration, with the most efficient denitrification capacity observed at NaCl concentrations of 0-10 g/L.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2021)
Article
Environmental Sciences
Chunbo Wang, Qijia Cai, Yang Li, Cuicui Tian, Xingqiang Wu, Yuhong Huang, Bangding Xiao
Summary: The mechanical harvesting technology combining flocculation with a rotary drum filter effectively removed cyanobacterial blooms and improved water quality. The treatment significantly reduced chlorophyll-a and turbidity levels, as well as nutrient concentrations, making it a promising approach for eutrophic lakes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Huaming Wu, Xingqiang Wu, Tiantian Yang, Chunbo Wang, Cuicui Tian, Bangding Xiao, Andreas Lorke
Summary: This study investigated the interactions between light availability and algal growth dynamics in the formation of surface blooms. The findings showed that high cell concentrations of Microcystis promote the formation of surface scum, and the scum can persist throughout diel photoperiods. Additionally, the study revealed the positive feedback regulation of Microcystis surface scum formation and stability by self-shading.
Article
Limnology
Yang Liu, Youxin Chen, Haiyan Fang, Hanyang Lu, Xingqiang Wu, Gongliang Yu, Shin-ichi Nakano, Renhui Li
Summary: The study in China isolated and identified different Microcystis species, detected mcyB gene-containing strains, and found significant differences between two groups of MC-producing Microcystis. Some strains in one group did not contain MC-RR. Compared with other regions, the proportion of Chinese MC-producing Microcystis differed, with M. aeruginosa being the most likely morphotype worldwide.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2021)
Article
Environmental Sciences
Shenghe Cai, Huaming Wu, Pei Hong, Oscar Omondi Donde, Chunbo Wang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: The bioflocculation technique has been shown to be a cost-effective and environmentally friendly method for harvesting microalgae, but its potential for controlling cyanobacterial blooms in eutrophic lakes has been under-studied. This study compared the bioflocculation efficiencies of different Microcystis species under chironomid stress conditions and found that Glyptotendipes tokunagai had better efficiency on M. wesenbergii than on M. aeruginosa. The research also highlighted the role of extracellular polymeric substances and silk in promoting the formation of large algal aggregates, providing new insights for combating Microcystis blooms.
Article
Engineering, Environmental
Qijia Cai, Kezheng Song, Cuicui Tian, Xingqiang Wu, Yang Li, Yuhong Huang, Chunbo Wang, Bangding Xiao
Summary: The study investigated the effect of extracellular organic matter (EOM) on the removal of Microcystis using flocculation with cationic polyacrylamide (CPAM) and filtration with 100-mu m filter. It found that the removal efficiency increased with the growth of Microcystis, attributed to the accumulated EOM. Additionally, the study revealed that the proportion of protein and polysaccharide in the EOM positively correlated with removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Pei Hong, Keyin Yang, Yilin Shu, Bangding Xiao, Hailong Wu, Yunyun Xie, Yali Gu, Fangping Qian, Xingqiang Wu
Summary: By studying three aerobic denitrifiers with dual-capacities of strong auto-aggregation and high nitrogen removal efficiency, efficient nitrogen-rich wastewater treatment in a sequencing batch biofilm reactor was achieved. The coaggregation strains successfully colonized in the bioreactor and demonstrated a strong tolerance to high nitrogen concentrations, contributing to efficient inorganic nitrogen removal and biofilm formation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Shenghe Cai, Yunlu Jia, Oscar Omondi Donde, Zhi Wang, Junqian Zhang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: The study revealed that Microcystis has significant negative effects on the emergence and burrowing activity of Chironomus larvae, as well as their locomotion ability and growth. Temperature and different Microcystis diets have a major impact on Chironomus larvae, showing distinct effects on their life history traits.
ENVIRONMENTAL POLLUTION
(2021)
Article
Microbiology
Pei Cai, Qijia Cai, Feng He, Yuhong Huang, Cuicui Tian, Xingqiang Wu, Chunbo Wang, Bangding Xiao
Summary: Temperature plays a key role in driving the overwintering strategy of Microcystis, with lower temperatures leading to overwintering in sediments and higher temperatures allowing for overwintering in the water column. Warmer winter temperatures may result in pelagic Microcystis becoming the primary inoculum sources in the spring.
Article
Environmental Sciences
Shihao Gong, Oscar Omondi Donde, Qijia Cai, Xingqiang Wu, Kezheng Song, Chunbo Wang, Pei Hong, Bangding Xiao, Cuicui Tian
Summary: In this study, wood chips and bark were used as natural solid carbon sources to enhance the denitrification capacity of lakeshore sediment and remove excess nitrate in wastewater treatment plant tailwater. The results showed that wood chips were more effective in enhancing the denitrification ability of lakeshore sediment for a longer period of time. Wood chips also promoted microbial activity and nitrate and nitrite reductase enzyme activities, facilitating denitrification in the sediment.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2022)
Article
Environmental Sciences
Shenghe Cai, Yilin Shu, Cuicui Tian, Chunbo Wang, Tao Fang, Bangding Xiao, Xingqiang Wu
Summary: This study analyzed the physiological and ecological responses of Chironomus pallidivittatus to MC-LR exposure, revealing the harmful effects on the growth and development of chironomid larvae, damage to intestinal mitochondria, promotion of oxidative stress and detoxification responses, as well as alterations in intestinal microbiota.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
