Article
Microbiology
Nan Zhang, Yiting Zhang, Tsing Bohu, Shanghua Wu, Zhihui Bai, Xuliang Zhuang
Summary: The discovery of heterotrophic nitrification-aerobic denitrification (HN-AD) microorganisms has opened up new possibilities for wastewater treatment. In this study, a new HN-AD microorganism, Pannonibacter sp. W30, was isolated and characterized. It showed high efficiency in aerobic inorganic nitrogen transformation and primarily depleted nitrogen through assimilation rather than denitrification. Compared to known Alphaproteobacterial HN-AD microbes, Pannonibacter sp. W30 had the potential to develop a suitable HN-AD technology for treating N-laden wastewater at a full-scale level.
Article
Agricultural Engineering
Xia Ke, Cong Liu, Su-Qin Tang, Ting-Ting Guo, Li Pan, Ya-Ping Xue, Yu-Guo Zheng
Summary: The Acinetobacter indicus strain ZJB20129 exhibited heterotrophic nitrification-aerobic denitrification ability, successfully removing ammonium-N, nitrite-N, and nitrate-N from wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Jinkun Fang, Shaoan Liao, Shanshan Zhang, Li Li, Simin Tan, Wenzhuo Li, Anli Wang, Jianmin Ye
Summary: Yeast strain K1 isolated from surface sediment was identified as Barnettozyma californica, showing efficient heterotrophic nitrification and aerobic denitrification abilities. The optimum carbon source for its growth and nitrogen removal activity was sucrose, and it has the potential to remove inorganic nitrogen from wastewater with a C/N ratio of 18.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Jingli Wang, Peizhen Chen, Shaopeng Li, Xiangqun Zheng, Chunxue Zhang, Wenjie Zhao
Summary: In this study, a high-efficiency heterotrophic nitrifying-aerobic denitrifying (SND) mutant strain was obtained using ultraviolet-diethyl sulfate compound mutagenesis. The mutant strain showed significantly improved nitrogen removal performance in wastewater treatment, with higher nitrification and denitrification rates compared to wild bacteria. This study provides a successful strategy for improving the nitrogen removal efficiency of SND bacteria.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Linhui Wu, Xiaoyu Ding, Yan Lin, Xingshun Lu, Hang Lv, Manping Zhao, Ruihong Yu
Summary: A newly identified bacterial strain, Acinetobacter calcoaceticus TY1, efficiently metabolized nitrogen from ammonium at low temperatures, indicating its potential for wastewater management.
BIORESOURCE TECHNOLOGY
(2022)
Article
Soil Science
Nadine Loick, Elizabeth Dixon, G. Peter Matthews, Christoph Mueller, Veronica S. Ciganda, Maria Lopez-Aizpun, Miguel A. Repullo, Laura M. Cardenas
Summary: This study quantifies the production and consumption pathways of N2O in soil using labelled substrate-N, showing the impact of different water filled pore space on N-transformation processes and emissions. The research highlights the importance of heterotrophic nitrification and denitrification in the N2O emissions, demonstrating the complex relationship between water filled pore space and nitrogen transformations.
Article
Environmental Sciences
Ai -ling Chen, Xia Su, Zhi-lin Xing, Fu-qing Xu, Shang-jie Chen, Jin-xin Xiang, Juan Li, Hao Liu, Tian-tao Zhao
Summary: The inhibitory effects and mechanisms of different salt ions on heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria Acinetobacter sp. TAC-1 were studied. NaCl, KCl, and Na2SO4 exerted different levels of inhibition on TAC-1, with Na2SO4 significantly downregulating denitrification gene transcripts.
ENVIRONMENTAL RESEARCH
(2022)
Article
Agricultural Engineering
Jie Hu, Jiabao Yan, Ling Wu, Yanzhou Bao, Danqing Tu, Jing Li
Summary: This study investigates the ability of a halophilic bacterium to perform simultaneous nitrification and denitrification in hypersaline wastewater, as well as its halotolerant mechanism. The results show that the isolated strain can efficiently remove nitrogen at 15% salinity and exhibits high resistance to various salts and heavy metals. Metabolic analysis reveals that the bacterium accumulates compatible solutes to resist high osmotic pressure and bound water molecules, achieving efficient nitrification and denitrification processes.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shiqi Wu, Na Lv, Yu Zhou, Xiufen Li
Summary: This study presents a novel Lysinibacillus fusiformis B301 strain that effectively removes nitrogenous pollutants via heterotrophic nitrification and aerobic denitrification (HN-AD) in one aerobic reactor. Under optimal conditions, it achieved high nitrogen removal rates for ammonium, nitrate, and nitrite. The strain preferentially consumed ammonium nitrogen and converted 83.25% of it to gaseous nitrogen.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Agricultural Engineering
Qinghong Wang, Jiawen Kong, Jiahao Liang, Mohamed Gamal El-Din, Peng Zhao, Wenyu Xie, Chunmao Chen
Summary: The bioaugmentation potential of aerobic granular sludge (AGS) was explored for improved nitrogen removal in petroleum wastewater treatment. A highly efficient heterotrophic nitrification-aerobic denitrification (HN-AD) bacterial consortium was constructed and used to bioaugment the AGS, resulting in enhanced nitrogen removal. The addition of the immobilized consortium facilitated the formation of larger AGS particles and increased the gene abundance related to heterotrophic nitrification.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Ke Ding, Linge Xu, Yulin Chen, Wenxuan Li, Xiaoli Chai, Xiaohu Dai, Boran Wu
Summary: This study found that polyhydroxyalkanoates (PHAs) have advantages in screening specific denitrifying bacteria compared with other carbon sources like glucose and sodium acetate. The microbial community screened by PHA was identified, and the environmental functions of these bacteria were analyzed. PHA improved denitrification efficiency by increasing the expression of key enzymes and accelerating the assimilation rate of nitrate. Mechanistic insights into the PHA-enhanced denitrification capacity of the microbial community can provide novel options for eutrophic surface water remediation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Yuan Cui, You-Wei Cui, Ji-Lin Huang
Summary: The halophilic bacterium strain SND-01 of Exiguobacterium mexicanum, isolated in this study, shows potential in nitrogen removal in saline wastewater treatment, with a maximum nitrogen removal rate observed under various nitrogen sources and aerobic conditions.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xueping Tian, Jingtao Zhao, Jun Huang, Guoke Chen, Yonggui Zhao
Summary: The metabolic process of aerobic granular sludge (AGS) treating piggery wastewater with high concentrations of carbon and nitrogen was elucidated through a combined analysis of microbial community, denitrification genes, and mathematical model calculations. The dominant microorganisms in AGS had potentials of various metabolic activities, with aerobic denitrification process being dominant. The study also revealed the resistance of rapid organic substrates storage in AGS during feast phase against high strength wastewater, providing carbon and energy sources in the famine phase.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Agricultural Engineering
Peipei Chen, Fupan Zhang, Lijie Zhang, Hao Liu, Qian Zhang, Zhilin Xing, Tiantao Zhao
Summary: A novel heterotrophic nitrification and aerobic denitrification strain CY-10, identified as Sphingopyxis sp., was isolated. The strain exhibited different nitrogen removal efficiencies when ammonium, nitrate, or nitrite were used as the sole nitrogen source. The optimal salinity for ammonia nitrogen removal was found to be 0-5%, and the strain showed increased metabolic levels of sucrose and D-tagatose at 5% salinity condition. The functional genes and pathway of HN-AD were successfully identified, suggesting the potential of strain CY-10 in nitrogen removal treatment of saline wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Qian Zhang, Yunan Zhu, Chunbo Yuan, Chu Zhang, Minglei Cui, Tiantao Zhao
Summary: A highly salt and high ammonia nitrogen tolerant heterotrophic nitrifying bacterium, Alcaligenes faecalis TF-1, was isolated from landfill leachate. The study investigated its nitrogen removal pathway and optimized nitrogen removal conditions.
BIORESOURCE TECHNOLOGY
(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)