Review
Engineering, Environmental
Peng Wu, Junjiang Chen, Vijay Kumar Garlapati, Xingxing Zhang, Francis Wani Victor Jenario, Xiang Li, Wenru Liu, Chongjun Chen, Tejraj M. Aminabhavi, Xiaonong Zhang
Summary: This study presents a comprehensive review of the anammox process, the advancements in nitritation and denitratation processes, and proposes a novel wastewater treatment method for efficient nitrogen removal.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Shenhua Yang, Yongzhen Peng, Shujun Zhang, Xiaoyu Han, Jialin Li, Liang Zhang
Summary: This study analyzed and compared the biofilm structure, performance, and nitrogen removal pathways of microporous and macroporous carriers from a full-scale partial nitritation/anammox reactor. Microporous carriers had thicker biofilms, higher biomass, and nitrogen removal efficiency due to the integration of denitrifying and anammox bacteria, while macroporous carriers had thinner biofilms, lower microbial richness, but strong network correlation among genera.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Lijun Yang, Hong Yao, Fangxu Jia, Baohong Han, Yao Chen, Jie Jiang, Tao Liu, Jianhua Guo
Summary: This study investigated the impact of nutrient availability on microbial diversity and community structure in a PN/A system. The results showed that reduced nutrient availability led to decreased microbial diversity and altered microbial communities. Slow-growing microorganisms were enriched in low-nutrient environments, and rare taxa with unique metabolic functions played important roles in the stability and function of the PN/A system.
Article
Engineering, Environmental
Hong Wang, Hong Chen, Long Chen, Yongdong Chen, Zixuan Liang, Enzhe Yang, Donghai Yang, Xiaohu Dai
Summary: This study investigated the effect of temperature reduction on the partial nitritation-anammox (PN/A) process. The results showed that temperature reduction influenced the expression of functional genes for anammox reaction and enhanced the biofilm formation and diversity of nitrogen removal pathways.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Xuefan Liu, Bo Wang, Yongzhen Peng, Xiaofei Gong, Qingteng Gong, Xiyao Li
Summary: The study found that using sludge fermentation liquid for partial denitrification in treating domestic wastewater is feasible and can enhance NO2?-N concentration and nitrate-to-nitrite transformation. High-throughput sequencing analysis showed that the increases of Thauera, Paracoccus and Enterobacteriaceae contribute to the enhancement of partial denitrification.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Ting Huang, Jianqiang Zhao, Bo Hu, Junkai Zhao, Chunbo Yuan
Summary: The addition of hydroxylamine successfully restored the one-stage partial nitritation and anammox process, improving nitrogen removal efficiency and reducing nitrate production ratio.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Yufeng Zheng, Youliang Zhang, Ni An, Liangliang Shi, Yan Wei, Bin Ma
Summary: Granule-based partial denitrification and anammox (PDA) process is influenced by microbial community. It was found that the nitrogen conversion rate is affected by granule size through microbial composition. The abundance of anammox bacteria increased with particle size, while the abundance of denitrifiers decreased and then increased. The microbial composition also affected nitrogen removal and nitrite accumulation in the granules.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Agricultural Engineering
Eli Hendrik Sanjaya, Yujie Chen, Yan Guo, Jiang Wu, Hong Chen, Mohd Fadhil Md Din, Yu-You Li
Summary: The study successfully implemented the SNADCO method in an air-lift moving bed biofilm reactor for treating digested fish processing wastewater, showing advantages in handling high ammonia concentration and organic compounds. The nitritation and anammox route were predominant in nitrogen removal, while COD oxidation and microbe proliferation played the main role in COD removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hong Wang, Xiaohu Dai, Yu Hua, Donghai Yang, Hong Chen
Summary: Low-strength ammonia and temperature pose challenges to the application of the partial nitritation-anammox (PNA) process in treating mainstream wastewater. This study investigated the effects of various substrate concentrations and temperatures on nitrogen removal performance, biochemical reaction rate, and specific activity in a single-stage PNA system. The results showed that low ammonia concentration caused a decline in reaction rate and activity of anammox bacteria, while low temperature resulted in a significant decrease in the relative abundance of anammox bacteria. Changes in metabolic pathways suggest that the PNA system can adapt to low substrate concentrations and temperatures by facilitating substance transport and reducing energy consumption.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Bo Wang, Xin Qiao, Feng Hou, Tao Liu, Hongtao Pang, Yuanyuan Guo, Jianhua Guo, Yongzhen Peng
Summary: A pilot-scale system integrating Partial Nitritation and simultaneous Anammox, Denitrification and Sludge Fermentation (PN + ADSF) process was developed to treat real municipal wastewater. The system achieved desirable total inorganic nitrogen (TIN) concentrations in the effluent and sludge reduction efficiency simultaneously. The characterization on microbial communities revealed the dominant functional bacteria for anammox and denitrification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Hong Chen, Hong Wang, Guanlong Yu, Ying Xiong, Haipeng Wu, Min Yang, Rong Chen, Enzhe Yang, Changbo Jiang, Yu-You Li
Summary: By controlling dissolved oxygen and aeration rate, stable performance can be maintained under oxygen-limiting conditions. The activation of ammonia oxidation bacteria (AOB), dominated anammox bacteria (AMX), suppression of NOB, and control of heterotrophic bacteria (HB) played a major role in achieving long-term stable operation in the biofilms.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Chihao Lin, Xiangmin Xiao, Yu-You Li, Jianyong Liu
Summary: Anaerobic ammonium oxidation (anammox) technology is seen as a promising alternative for wastewater treatment, with partial denitrification anammox (PDA) and partial nitritation anammox (PNA) being the mainstream processes. Comprehensive evaluation of their economic and environmental benefits is essential. The study proposed and analyzed two plant-wide processes, and showed that high rate activated sludge-PNA (HRAS-PNA) was more energy-efficient and cost-effective compared to chemically enhanced primary treatment-PDA (CEPT-PDA), with a significant decrease in total environmental impacts.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Environmental Sciences
Yao Chen, Ying Zhang, Liang Zhang, Shujun Zhang, Yongzhen Peng
Summary: Partial nitrification and partial denitrification combined with anammox is a promising process for sewage treatment, which was successfully achieved in this study by adding sludge fermentation products in the anoxic zone to facilitate nitrite accumulation and improve denitrification efficiency. The system achieved a high removal rate of total nitrogen, with enriched incomplete denitrifiers and ammonia oxidizing bacteria contributing to the high nitrite accumulation.
Article
Green & Sustainable Science & Technology
Xiaofei Gong, Liang Zhang, Xiyao Li, Qiong Zhang, Taotao Shang, Jingwen Guo, Chuanxin Wang, Shuying Wang, Yongzhen Peng
Summary: This study proposed a novel Integrated Anammox, Fermentation and Denitrification (IAFD) process which achieved a high efficiency of nitrogen removal from wastewater. The process showed environmental and economical advantages with no external carbon requirement, reduced aeration, and sludge reduction.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Agricultural Engineering
Wenyu Li, Yongzhen Peng, Ruitao Gao, Qiong Zhang, Xiyao Li, Chengkun Kao, Jianwei Li
Summary: This study investigates the impact of low salinity levels on a double-anammox system in treating municipal wastewater, finding that a salinity of 1.0% led to a nitrogen removal efficiency of 81.2%, with a significant contribution of 76.5% from anammox. Low salinity was also found to promote nitritation and denitratation, enhancing the overall nitrogen removal efficiency. The enrichment of specific microbial populations, such as Ca. Brocadia and Nitrosomonas, further supported the effectiveness of the double-anammox process in treating saline wastewater.
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)