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Unraveling the impact of intervention strategies and oxygen disparity in humification during domestic waste composting 揭示干预策略和氧气差异对生活垃圾堆肥过程中腐殖化的影响。
IF 9.7 1区 环境科学与生态学
Bioresource Technology Pub Date : 2024-11-01 DOI: 10.1016/j.biortech.2024.131736
Jialin Zhong, Shang Ding, Xixuan Zou, Mengwen Yu, Shuwen Du, Donglei Wu
{"title":"Unraveling the impact of intervention strategies and oxygen disparity in humification during domestic waste composting","authors":"Jialin Zhong,&nbsp;Shang Ding,&nbsp;Xixuan Zou,&nbsp;Mengwen Yu,&nbsp;Shuwen Du,&nbsp;Donglei Wu","doi":"10.1016/j.biortech.2024.131736","DOIUrl":"10.1016/j.biortech.2024.131736","url":null,"abstract":"<div><div>This study constructs three different photovoltaic assisted composting systems to treat rural domestic waste, and explores the interaction pathways between biomacromolecules and other factors under oxygen disparity at gradient heights of the compost. The optimized mode of regular turning and ventilation-dehydration significantly reduced the moisture content by 53.6% and increased the seed germination index by 35.6%. The oxygen content at different heights under the optimized mode significantly affects the physicochemical properties of the compost, and the degradation of cellulose, hemicellulose, and protein in the middle is higher than other parts. The structural equation model shows that the physicochemical properties at the bottom are affected by biomacromolecules, which may be related to volatile fatty acids(VFAs) produced under low oxygen conditions.The research results show that using manual turning and ventilation-dehydration as the optimized process can promote compost maturity, and oxygen concentration has an important impact on the humification process of the compost.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"416 ","pages":"Article 131736"},"PeriodicalIF":9.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improved reactor design enables productivity of microbial electrosynthesis on par with classical biotechnology 经过改进的反应器设计可使微生物电合成的生产率达到传统生物技术的水平。
IF 9.7 1区 环境科学与生态学
Bioresource Technology Pub Date : 2024-10-31 DOI: 10.1016/j.biortech.2024.131733
Jörg S. Deutzmann , Grace Callander , Alfred M. Spormann
{"title":"Improved reactor design enables productivity of microbial electrosynthesis on par with classical biotechnology","authors":"Jörg S. Deutzmann ,&nbsp;Grace Callander ,&nbsp;Alfred M. Spormann","doi":"10.1016/j.biortech.2024.131733","DOIUrl":"10.1016/j.biortech.2024.131733","url":null,"abstract":"<div><div>Microbial electrosynthesis (MES) converts (renewable) electrical energy into CO<sub>2</sub>-derived chemicals including fuels. To achieve commercial viability of this process, improvements in production rate, energy efficiency, and product titer are imperative. Employing a compact plate reactor with zero gap anode configuration and NiMo-plated reticulated vitreous carbon cathodes substantially improved electrosynthesis rates of methane and acetic acid. Electromethanogenesis rates exceeded 10 L L<sup>–1</sup><sub>catholyte</sub> d<sup>–1</sup> using an undefined mixed culture. Continuous thermophilic MES by <em>Thermoanaerobacter kivui</em> produced acetic acid at a rate of up to 3.5 g L<sup>−1</sup><sub>catholyte</sub> h<sup>−1</sup> at a titer of 14 g/L<em>,</em> surpassing continuous gas fermentation without biomass retention and on par with glucose fermentation by <em>T. kivui</em> in chemostats. Coulombic efficiencies reached 80 %–90 % and energy efficiencies up to 30 % for acetate and methane production. The performance of this plate reactor demonstrates that MES can deliver production rates that are competitive with those of established biotechnologies.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"416 ","pages":"Article 131733"},"PeriodicalIF":9.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mild and efficient approach to aromatic backbone cleavage using copper-lignosulfonate/hydrogen peroxide system 使用木质素磺酸铜/过氧化氢系统温和高效地裂解芳香族骨架。
IF 9.7 1区 环境科学与生态学
Bioresource Technology Pub Date : 2024-10-30 DOI: 10.1016/j.biortech.2024.131729
Apisit Manassa , Beom Soo Kim , Pornchai Rachtanapun , Thanongsak Chaiyaso , Charin Techapun , Phisit Seesuriyachan
{"title":"Mild and efficient approach to aromatic backbone cleavage using copper-lignosulfonate/hydrogen peroxide system","authors":"Apisit Manassa ,&nbsp;Beom Soo Kim ,&nbsp;Pornchai Rachtanapun ,&nbsp;Thanongsak Chaiyaso ,&nbsp;Charin Techapun ,&nbsp;Phisit Seesuriyachan","doi":"10.1016/j.biortech.2024.131729","DOIUrl":"10.1016/j.biortech.2024.131729","url":null,"abstract":"<div><div>This study investigates the dual role of copper ions in catalysis and complexation during the oxidation of lignosulfonates with hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) under alkaline conditions. The presence of copper ions reduces partial oxidation by 86 % compared to H<sub>2</sub>O<sub>2</sub> treatment alone, enhancing overall conversion efficiency to 63 % under increased oxidative conditions. Analyses reveal that copper-lignosulfonate complexes facilitate redox cycling and hydroxyl radical generation through interactions with H<sub>2</sub>O<sub>2</sub>, confirming copper’s dual functions. This mechanism mitigates the hindrance of sulfonic groups on hydroperoxide anions, leading to lignosulfonate degradation into dicarboxylic acids. These findings provide novel insights into the copper-lignosulfonate/H<sub>2</sub>O<sub>2</sub> system, expanding the understanding of oxidative degradation mechanisms beyond traditional Fenton-like reactions. Furthermore, this system offers a simplified and efficient alternative for industrial applications, particularly in integration with the sulfite pretreatment process of woody biomass for producing valuable co-products.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"416 ","pages":"Article 131729"},"PeriodicalIF":9.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Green hydrogen and porous carbon materials co-harvested through CO2-steam co-mediated gasification 通过二氧化碳-蒸汽共介导气化技术共同收获绿色氢气和多孔碳材料。
IF 9.7 1区 环境科学与生态学
Bioresource Technology Pub Date : 2024-10-29 DOI: 10.1016/j.biortech.2024.131726
Xin Zhang , Chuan Qin , Yi Lu , Quan Liu , Hongkang Liu , Chun Wang , Guanyu Zhang , Ge Kong , Kejie Wang , Jing Li , Jianying Shang , Xuesong Zhang , Lujia Han
{"title":"Green hydrogen and porous carbon materials co-harvested through CO2-steam co-mediated gasification","authors":"Xin Zhang ,&nbsp;Chuan Qin ,&nbsp;Yi Lu ,&nbsp;Quan Liu ,&nbsp;Hongkang Liu ,&nbsp;Chun Wang ,&nbsp;Guanyu Zhang ,&nbsp;Ge Kong ,&nbsp;Kejie Wang ,&nbsp;Jing Li ,&nbsp;Jianying Shang ,&nbsp;Xuesong Zhang ,&nbsp;Lujia Han","doi":"10.1016/j.biortech.2024.131726","DOIUrl":"10.1016/j.biortech.2024.131726","url":null,"abstract":"<div><div>A novel strategy was proposed for valorizing biomass to co-harvest green H<sub>2</sub> and functionalized porous carbon materials. Gasification of cotton stalk (CS) was first operated in varying gasifying agents. Both the gas yields and the surface area of gasification carbon materials obtained in the gasifying combinations were higher than their counterparts, indicating the synergistic effect between the mixed gasifying agents. In particular, the highest H<sub>2</sub> yield (15.3 mmol/g) and syngas purity (88.01 %) were found in the mixed CO<sub>2</sub>-steam gasifying agents. The largest surface area (671 m<sup>2</sup>/g) and pore volume (0.338 cm<sup>3</sup>/g) were also achieved in the mixed gasifying agents of CO<sub>2</sub> and steam. Importantly, these carbon materials were effective for adsorbing toxic phenolic compounds in hydrothermal wastewater (removal efficiency &gt; 52 %). Overall, this study provided a promising strategy to valorize agricultural biomass into green H<sub>2</sub> and functionalized porous carbon materials for toxic wastewater treatment.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"415 ","pages":"Article 131726"},"PeriodicalIF":9.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carbon-negative bio-production of short-chain carboxylic acids (SCCAs) from syngas via the sequential two-stage bioprocess by Moorella thermoacetica and metabolically engineered Escherichia coli Moorella thermoacetica 和经过代谢工程改造的大肠杆菌通过两阶段顺序生物工艺从合成气中负碳生产短链羧酸 (SCCAs)。
IF 9.7 1区 环境科学与生态学
Bioresource Technology Pub Date : 2024-10-28 DOI: 10.1016/j.biortech.2024.131714
Peng Fei , Wenrui Zhang , Yanzhe Shang , Peng Hu , Yang Gu , Yuanchan Luo , Hui Wu
{"title":"Carbon-negative bio-production of short-chain carboxylic acids (SCCAs) from syngas via the sequential two-stage bioprocess by Moorella thermoacetica and metabolically engineered Escherichia coli","authors":"Peng Fei ,&nbsp;Wenrui Zhang ,&nbsp;Yanzhe Shang ,&nbsp;Peng Hu ,&nbsp;Yang Gu ,&nbsp;Yuanchan Luo ,&nbsp;Hui Wu","doi":"10.1016/j.biortech.2024.131714","DOIUrl":"10.1016/j.biortech.2024.131714","url":null,"abstract":"<div><div>Syngas can be efficiently converted to acetate by <em>Moorella thermoacetica</em> under anaerobic conditions, which is environmentally friendly. Coupled with acetate production from syngas, using acetate to synthesize value-added compounds such as short-chain carboxylic acids (SCCAs) becomes a negative-carbon process. <em>Escherichia coli</em> is engineered to utilize acetate as the sole carbon source to produce SCCAs. By knocking out some acetyltransferase genes, introducing exogenous pathway and additional cofactor engineering, the strains can synthesize 3.79 g/L of 3-hydroxypropionic acid (3-HP), 1.83 g/L of (<em>R</em>)-3-hydroxybutyric acid (<em>R</em>-3HB), and 2.31 g/L of butyrate. We used <em>M. thermoacetica</em> to produce acetate from syngas. Subsequently, all engineered <em>E. coli</em> strains were able to produce SCCAs from syngas-derived acetate. The titers of 3-HP, <em>R</em>-3HB, and butyrate are 3.75, 1.68, and 2.04 g/L, with carbon sequestration rates of 51.1, 26.3, and 38.1 %. This coupled bioprocess has great potential for producing a range of other value-added chemicals from syngas.</div></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"416 ","pages":"Article 131714"},"PeriodicalIF":9.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent advances in biorefineries based on lignin extraction using deep eutectic solvents: A review 基于深度共晶溶剂提取木质素的生物精炼技术的最新进展:综述。
IF 11.4 1区 环境科学与生态学
Bioresource Technology Pub Date : 2023-11-01 DOI: 10.1016/j.biortech.2023.129744
Álvaro Lobato-Rodríguez , Beatriz Gullón , Aloia Romaní , Pedro Ferreira-Santos , Gil Garrote , Pablo G. Del-Río
{"title":"Recent advances in biorefineries based on lignin extraction using deep eutectic solvents: A review","authors":"Álvaro Lobato-Rodríguez ,&nbsp;Beatriz Gullón ,&nbsp;Aloia Romaní ,&nbsp;Pedro Ferreira-Santos ,&nbsp;Gil Garrote ,&nbsp;Pablo G. Del-Río","doi":"10.1016/j.biortech.2023.129744","DOIUrl":"10.1016/j.biortech.2023.129744","url":null,"abstract":"<div><p>Considering the urgent need for alternative biorefinery schemes based on sustainable development, this review aims to summarize the state-of-the-art in the use of deep eutectic solvent pretreatment to fractionate lignocellulose, with a focus on lignin recovery. For that, the key parameters influencing the process are discussed, as well as various strategies to enhance this pretreatment efficiency are explored. Moreover, this review describes the challenges and opportunities associated with the valorization of extraction-derived streams and highlights recent advancements in solvent recovery techniques. Furthermore, the utilization of computational models for process design and optimization is introduced, as the initial attempts at the economic and environmental assessment of this lignocellulosic bioprocess based on deep eutectic solvents. Overall, this review offers a comprehensive perspective on the recent advances in this emerging field and serves as a foundation for further research on the potential integration of deep eutectic pretreatment in sustainable multi-product biorefinery schemes.</p></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"388 ","pages":"Article 129744"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0960852423011720/pdfft?md5=f7015fd4baa01e3b66435717d7bd84ce&pid=1-s2.0-S0960852423011720-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10605269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Key metabolites and regulatory network mechanisms in co-culture of fungi and microalgae based on metabolomics analysis 基于代谢组学分析的真菌和微藻共培养中的关键代谢产物和调控网络机制。
IF 11.4 1区 环境科学与生态学
Bioresource Technology Pub Date : 2023-11-01 DOI: 10.1016/j.biortech.2023.129718
Junjun Wang , Qinghua Tian , Hao Zhou , Jue Kang , Xinyi Yu , Li Shen
{"title":"Key metabolites and regulatory network mechanisms in co-culture of fungi and microalgae based on metabolomics analysis","authors":"Junjun Wang ,&nbsp;Qinghua Tian ,&nbsp;Hao Zhou ,&nbsp;Jue Kang ,&nbsp;Xinyi Yu ,&nbsp;Li Shen","doi":"10.1016/j.biortech.2023.129718","DOIUrl":"10.1016/j.biortech.2023.129718","url":null,"abstract":"","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"388 ","pages":"Article 129718"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10649389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring influence mechanism of small-molecule carbon source on heterotrophic nitrification-aerobic denitrification process from carbon metabolism, nitrogen metabolism and electron transport process 从碳代谢、氮代谢和电子传递过程探讨小分子碳源对异养硝化-好氧反硝化过程的影响机理。
IF 11.4 1区 环境科学与生态学
Bioresource Technology Pub Date : 2023-11-01 DOI: 10.1016/j.biortech.2023.129681
Juntong Leng , Jiyan Lu , Chao Hai , Xinyi Liu , Pei Wu , Yan Sun , Chunbo Yuan , Jianqiang Zhao , Bo Hu
{"title":"Exploring influence mechanism of small-molecule carbon source on heterotrophic nitrification-aerobic denitrification process from carbon metabolism, nitrogen metabolism and electron transport process","authors":"Juntong Leng ,&nbsp;Jiyan Lu ,&nbsp;Chao Hai ,&nbsp;Xinyi Liu ,&nbsp;Pei Wu ,&nbsp;Yan Sun ,&nbsp;Chunbo Yuan ,&nbsp;Jianqiang Zhao ,&nbsp;Bo Hu","doi":"10.1016/j.biortech.2023.129681","DOIUrl":"10.1016/j.biortech.2023.129681","url":null,"abstract":"<div><p>The heterotrophic nitrification-aerobic denitrification (HNAD) process can remove nitrogen and organic carbon under aerobic conditions. To get the in-depth mechanism of the HAND process, a strain named <em>Acinetobacter johnsonii</em> ZHL01 was isolated, and enzyme activity, electron transport, energy production, and gene expression of the strain were studied with small-molecule carbon sources, including sodium citrate, sodium acetate, sodium fumarate, and sodium succinate. The HNAD pathway of ZHL01 was NH<sub>4</sub><sup>+</sup>→NH<sub>2</sub>OH → NO, and nitrogen balance analysis shows that ZHL01 could assimilate and denitrify 58.29 ± 1.05 % and 16.58 ± 1.07 % of nitrogen, respectively. The assimilation, the nitrification/denitrification, and the respiration processes were regulated by the concentration of reduced nicotinamide adenine dinucleotide (NADH) produced from the different metabolic pathways of small-molecule carbon sources. The HNAD process occurs to reduce intracellular redox levels related to NADH concentrations. This discovery provides a theoretical basis for the practical application of HAND bacteria.</p></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"387 ","pages":"Article 129681"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10187083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biochar production and its environmental applications: Recent developments and machine learning insights 生物炭生产及其环境应用:最新进展和机器学习见解。
IF 11.4 1区 环境科学与生态学
Bioresource Technology Pub Date : 2023-11-01 DOI: 10.1016/j.biortech.2023.129634
Kolli Venkata Supraja , Himanshu Kachroo , Gayatri Viswanathan , Vishal Kumar Verma , Bunushree Behera , Tharaka Rama Krishna C. Doddapaneni , Priyanka Kaushal , Sk. Ziauddin Ahammad , Vijai Singh , Mukesh Kumar Awasthi , Rohan Jain
{"title":"Biochar production and its environmental applications: Recent developments and machine learning insights","authors":"Kolli Venkata Supraja ,&nbsp;Himanshu Kachroo ,&nbsp;Gayatri Viswanathan ,&nbsp;Vishal Kumar Verma ,&nbsp;Bunushree Behera ,&nbsp;Tharaka Rama Krishna C. Doddapaneni ,&nbsp;Priyanka Kaushal ,&nbsp;Sk. Ziauddin Ahammad ,&nbsp;Vijai Singh ,&nbsp;Mukesh Kumar Awasthi ,&nbsp;Rohan Jain","doi":"10.1016/j.biortech.2023.129634","DOIUrl":"10.1016/j.biortech.2023.129634","url":null,"abstract":"<div><p>Biochar production through thermochemical processing is a sustainable biomass conversion and waste management approach. However, commercializing biochar faces challenges requiring further research and development to maximize its potential for addressing environmental concerns and promoting sustainable resource management. This comprehensive review presents the state-of-the-art in biochar production, emphasizing quantitative yield and qualitative properties with varying feedstocks. It discusses the technology readiness level and commercialization status of different production strategies, highlighting their environmental and economic impacts. The review focuses on integrating machine learning algorithms for process control and optimization in biochar production, improving efficiency. Additionally, it explores biochar's environmental applications, including soil amendment, carbon sequestration, and wastewater treatment, showcasing recent advancements and case studies. Advances in biochar technologies and their environmental benefits in various sectors are discussed herein.</p></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"387 ","pages":"Article 129634"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10193446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pilot-scale demonstration of self-enrichment of anammox bacteria in a two-stage nitrification-denitrification suspended sludge system treating municipal wastewater under extremely low nitrogen loading rate 在极低氮负荷率下,厌氧氨氧化菌在两级硝化-反硝化悬浮污泥系统中自富集的中试示范。
IF 11.4 1区 环境科学与生态学
Bioresource Technology Pub Date : 2023-11-01 DOI: 10.1016/j.biortech.2023.129693
Yunlong Su , Rui Du , Jiao Wang , Xiyao Li , Qiong Zhang , Xiaofei Xue , Yongzhen Peng
{"title":"Pilot-scale demonstration of self-enrichment of anammox bacteria in a two-stage nitrification-denitrification suspended sludge system treating municipal wastewater under extremely low nitrogen loading rate","authors":"Yunlong Su ,&nbsp;Rui Du ,&nbsp;Jiao Wang ,&nbsp;Xiyao Li ,&nbsp;Qiong Zhang ,&nbsp;Xiaofei Xue ,&nbsp;Yongzhen Peng","doi":"10.1016/j.biortech.2023.129693","DOIUrl":"10.1016/j.biortech.2023.129693","url":null,"abstract":"<div><p>In suspended sludge system, efficient enrichment and retention of anammox bacteria are crucial obstacles in mainstream wastewater treatment by anammox process. In this study, anammox bacteria was self-enriched in a pilot-scale suspended sludge system of two-stage nitrification–denitrification process serving municipal wastewater treatment. With the low ammonia (NH<sub>4</sub><sup>+</sup>-N) of 9.3 mg/L, nitrate (NO<sub>3</sub><sup>–</sup>-N) of 15.6 mg/L and COD/NO<sub>3</sub><sup>–</sup>-N of 2.2 under extremely low nitrogen loading rate of 0.012 kg N/m<sup>3</sup>/d, anammox activity bloomed after its abundance increasing from 5.9 × 10<sup>7</sup> to 4.6 × 10<sup>9</sup> copies/g dry sludge. Significant NH<sub>4</sub><sup>+</sup>-N removal was occurred and maintained stably in the denitrification reactor with anammox bacteria accounting for 1.13%, even under temperature decreasing to 20.0℃. The adequately anoxic environment, efficient retention with the static settlement, and NO<sub>2</sub><sup>–</sup> production via NO<sub>3</sub><sup>–</sup> reduction provided favorable environment for anammox bacteria. This study demonstrated the feasibility and great potential in mainstream anammox application without seeding specific sludge.</p></div>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":"387 ","pages":"Article 129693"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10196706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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