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
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
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
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
Environmental Sciences
Na Xu, Min Liao, Yuqi Liang, Jiawen Guo, Yuhao Zhang, Xiaomei Xie, Qiyan Fan, Yunqiang Zhu
Summary: A novel heterotrophic nitrification and aerobic denitrification (HNAD) bacteria, Bacillus thuringiensis strain WXN-23, was isolated from husk feed filtrate of a pig farm. It could efficiently remove nitrogen in simulated wastewater, adapt to low C/N ratio conditions, and showed a nitrogen balance efficiency of 63.5% in the form of N-2. The most optimal conditions for total nitrogen removal were shaking speed of 126.89 r/min, C/N ratio of 5.91, temperature of 32.81. C, and pH value of 8.17. The nitrification-denitrification metabolic pathway under aerobic conditions was determined, and strain WXN-23 exhibited high removal efficiencies for TN, NH4+-N, NO3--N and NO2--N in wastewater treatment.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Ji-Lin Huang, You-Wei Cui, Jin-Lei Yan, Yuan Cui
Summary: Heterotrophic nitrification-aerobic denitrification (HN-AD) is a promising method for nitrogen removal, and this study found that autotrophic nitrification can be converted into HN-AD in a halophilic aerobic granular sludge (HAGS) system. HAGS with dominant bacteria affiliated to Paracoccus showed stable performance in removing total inorganic nitrogen (TIN) in response to salinity variations, and HN-AD was inhibited under extreme salinity conditions.
CHEMICAL ENGINEERING JOURNAL
(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
Min Deng, Xiaoli Zhao, Yeerken Senbati, Kang Song, Xugang He
Summary: Pseudomonas sp. DM02 demonstrates efficient nitrogen removal capabilities in aquaculture wastewater treatment, with quick removal of total ammonia nitrogen and nitrates. Optimal environmental conditions and the presence of functional genes play a crucial role in water quality treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Lu Wang, Yutong Fu, Shuaijie Wang, Fei Ye, Enming Cui, Qina Sun
Summary: This study focuses on mariculture wastewater containing high nitrogenous compounds and develops a halotolerant heterotrophic nitrification-aerobic denitrification bacterium for efficient nitrogen removal. The bacterium shows high removal rates for ammonium and nitrate, even at increased salinity and lower temperatures. This research provides a promising microorganism for the treatment of mariculture wastewater.
Article
Environmental Sciences
Tingjiang Wang, Mengping Chen, Xiwen Liang, Fali Chen, Tengxia He, Zhu Li
Summary: Bacillus thuringiensis EM-A1 strain efficiently removes nitrogen from hydroxylamine and shows potential for bioremediation of inorganic nitrogen in wastewater.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Shixi Liu, Qi Liu, Han Wu, Wenyu Jiang, Alimu Kahaer, Qian Tang, Zhiquan Hu, Chol Hong, Dongqi Liu
Summary: The novel heterotrophic nitrification-aerobic denitrification bacterium, Pseudomonas sp. N31942, was isolated from a eutrophic lake. The strain showed high ammonia nitrogen removal ability in an oligotrophic environment and its nitrogen removal mechanisms were investigated through transcriptomic and integrative omics analyses. In addition, the bacterium exhibited excellent nitrogen removal ability in real sewage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Yuan Sui, You-Wei Cui, Ji-Lin Huang, Meng-Jiao Xu
Summary: The feast/famine ratio was found to regulate the population succession of autotrophic ammonia oxidizing bacteria (AOB) and heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria, providing a solution for enriching HN-AD bacteria in halophilic aerobic granular sludge (HAGS) systems.
BIORESOURCE TECHNOLOGY
(2024)
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
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
Environmental Sciences
Zhuangzhuang Xiang, Xi Chen, Jie Bai, Bohan Li, Hui Li, Xiao Huang
Summary: Moving bed biofilm reactor (MBBR) exhibits poor nitrogen removal efficiency for mariculture wastewater treatment in high salinity environment. Introduction of a novel halophilic heterotrophic nitrification aerobic denitrification (HNAD) strain (Zobellella B307) into the MBBR process enhances nitrogen removal. The strain Zobellella B307 demonstrates high ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) removal efficiency (90.9% and 97.1% respectively) after 10 hours cultivation, and shows strong resistance to salinity variation (efficient growth and nitrogen removal at a salinity of 65 parts per thousand). Moreover, the bioaugmentation of strain Zobellella B307 results in significant removal of chemical oxygen demand (COD), NH4+-N, and NO3--N (reaching 95.6%, 94.4%, and 85.7% respectively). Microbial community analysis reveals successful proliferation of strain Zobellella B307 (relative abundance increased to 2.33%). Increased abundance and dominance of HNAD bacteria during nitrogen removal process contribute to improved nitrogen removal. Microbial functional analysis indicates enhanced carbohydrate and amino acid metabolism categories with the addition of strain Zobellella B307, promoting nitrogen removal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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)