检索结果-南通市图书馆

Effect of initial ammonium concentration on a one-stage partial nitrification/anammox biofilm system:Nitrogen removal performance and the microbial community

引用

Journal of Environmental Sciences 2024年第9期143卷 176-188页

作者： Mengyu Zhou Yun Han Yang Zhuo Fen Yu Gaoyuan Hu Dangcong Peng School of Municipal and Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Shaanxi Key Laboratory of Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Key Laboratory of Northwest Water Resource Environment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China

One-stage partial nitrification coupled with anammox(PN/A)technology effectively reduces the energy consumption of a biological nitrogen removal system.Inhibiting nitrite-oxidizing bacteria(NOB)is essential for this technology to maintain efficient nitrogen removal performance.Initial ammonium concentration(IAC)affects the degree of inhibited NOB.In this study,the effect of the IAC on a PN/A biofilm was investigated in a moving bed biofilm reactor.The results showed that nitrogen removal efficiency decreased from 82.49%±1.90%to 64.57%±3.96%after the IAC was reduced from 60 to 20 mg N/L,while the nitrate production ratio increased from 13.87%±0.90%to 26.50%±3.76%.NOB activity increased to1,133.86 mg N/m^(2)/day after the IAC decreased,approximately 4-fold,indicating that the IAC plays an important inhibitory role in NOB.The rate-limiting step in the mature biofilm of the PN/A system is the nitritation process and is not shifted by the IAC.The analysis of the microbial community structure in the biofilm indicates that the IAC was the dominant factor in changes in community structure.Ca.Brocadia and Ca.Jettenia were the main anammox bacteria,and Nitrosomonas and Nitrospira were the main AOB and NOB,respectively.IAC did not affect the difference in growth between Ca.Brocadia and Ca.Jettenia.Thus,modulating the IAC promoted the PN/A process with efficient nitrogen removal performance at medium to low ammonium concentrations.

关键词： Biological nitrogen removal Partial nitrification anammox Ammonium concentration Biofilm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Conversion of nitrogen and carbon in enriched paddy soil by denitrification coupled with anammox in a bioelectrochemical system

引用

Journal of Environmental Sciences 2022年第1期34卷 197-207页

作者： Luan Zhang Minghe Jiang Shungui Zhou Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China

The aim of this study is to investigate conversion of nitrogen and COD in enriched paddy soil by nitrification coupled with anammox process in a dual chamber bioelectrochemical system.The paddy soil was enriched for denitrification coupled with anammox by microbial consortia and was acclimatized in the cathodic chamber of microbial fuel cells(MFCs).The bioelectrochemical systems were treated with different ammonium concentrations in the cathodic chamber:the MFC with low concentration ammonium(LA-MFC,50 mg/L ammonium),the MFC with medium concentration ammonium(MA-MFC,500 mg/L ammonium),and MFC with high concentration ammonium(HA-MFC,1000 mg/L ammonium),and the initial COD in the anodic chamber was 1200 mg/L.The CK treatments were conducted with1000 mg/L ammonium under the same conditions,except without inoculum in the cathode chamber.The consumption rate of ammonium in the cathodic chambers of CK,LA-MFC,MA-MFC,and HA-MFC were 9%,64%,84%,and 84%,respectively.The degradation rate for COD achieved in the anode chambers of CK,LA-MFC,MA-MFC,and HA-MFC were 70%,86%,93%,and 93%,respectively.The analysis of the microbial community of three treated MFCs in the cathode chamber indicated that the nitrification-denitrification process occurs in the cathode chamber.The dominant species for nitrification was Nitrospira,and the dominant species for denitrification were Denitratisoma,Dechloromonas,and Candidatus_Competibacter.Moreover,anammox process also observed in the cathode chamber.The functional genes nir S/K,hzs B,and 16S rDNA were assessed by qPCR analysis,and the results confirmed the presence of denitrification-coupled anammox in the cathodic chamber.

关键词： Paddy soil Bioelectrochemical system Denitrification anammox Microbial community

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of soluble organic matter and particulate organic matter on anammox system: Performance, microbial community and N_(2)O production

引用

Journal of Environmental Sciences 2023年第2期124卷 146-155页

作者： Yingying He HongyuMao Jacek Makinia Jakub Drewnowski Bing Wu Jun Xu Li Xie Xi Lu Key Laboratory of Yangtze Water Environment Ministry of EducationTongji UniversityShanghai 200092China Faculty of Civil and Environmental Engineering Gdansk University of TechnologyGdansk 80-233Poland

In this study,the effects of soluble readily biodegradable COD(sCOD)and particulate slowly biodegradable COD(pCOD)on anammox process were investigated.The results of the longterm experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity,to reach as high as 84.9%±2.8%TN removal efficiency.Partial denitrification-anammox(PDN/anammox)and denitrification were proposed as the major pathways for nitrogen removal,accounting for 91.3% and 8.7% of the TN removal,respectively.anammox bacteria could remain active with high abundance of anammox genes to maintain its dominance.Candidatus Kuenenia and Thauera were the predominant genera in the presence of organic matter.Compared with sCOD,batch experiments showed that the introduction of pCOD had a negative effect on nitrogen removal.The contribution of denitrification to nitrogen removal decreased from approximately 14%to 3% with increasing percentage of pCOD.In addition,the analysis result of the process data using an optimized ASM1 model indicated that high percentage of pCOD resulted in serious N_(2)O emission(the peak value up to 0.25mg N/L),whichwas likely due to limited mass diffusion and insufficient available carbon sources for denitrification.However,a high sCOD/N ratio was beneficial for alleviating N_(2)O accumulation.

关键词： anammox Partial denitrification Microbial community structure Carbon composition Nitrous oxide production

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The main anammox-based processes, the involved microbes and the novel process concept from the application perspective

引用

Frontiers of Environmental Science & Engineering 2022年第7期16卷 1-19页

作者： Yan Guo Zibin Luo Junhao Shen Yu-You Li Department of Environmental Engineering School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing100083China Department of Civil and Environmental Engineering Graduate School of EngineeringTohoku UniversitySendaiMiyagi980-8579Japan Graduate School of Environmental Studies Tohoku UniversitySendaiMiyagi980-8579Japan

anammox technology has been widely researched over the past 40-year from the laboratory-scale to full-scale. It is well-known that in actual applications, the solo application of anammox is not feasible. Since both ammonium and nitrite are prerequisites based on the reaction mechanism, the pre-treatment of wastewater is necessary. With the combination of anammox process and other pre-treatment processes to treat the actual wastewater, many types of anammox-based processes have been developed with distinct nitrogen removal performance. Thus, in order to heighten the awareness of researchers to the developments and accelerate the application of these processes to the treatment of actual wastewater, the main anammox-based processes are reviewed in this paper. It includes the partial nitritation/anammox process, the denitratation/anammox (PD/A) process, the denitrifying anaerobic methane oxidation/anammox (DAMO/A) process, and more complex deuterogenic processes. These processes have made the breakthroughs in the application of the anammox technology, such as the combination of nitrification and PD/A process can achieve stability and reliability of nitrogen removal in the treatment of mainstream wastewater, the PD/A process and the DAMO/A have brought about further improvements in the total nitrogen removal efficiency of wastewater. The diversity of functional microbe characteristics under the specific condition indicate the wide application potential of anammox-based processes, and further exploration is necessary. A whole waste treatment system concept is proposed through the effective allocation of above mentioned processes, with the maximum recovery of energy and resources, and minimal environmental impact.

关键词： anammox Nitritation Denitratation Denitrifying anaerobic methane oxidation Mainstream wastewater

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment

引用

Frontiers of Environmental Science & Engineering 2022年第3期16卷 73-79页

作者： Feng Hou Ting Zhang Yongzhen Peng Xiaoxin Cao Hongtao Pang Yanqing Shao Xianchun Lu Ju Yuan Xi Chen Jin Zhang China Water Environment Group Co.Ltd. Beijing 101101China National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Beijing 100124China Department of Energy and Environmental Engineering Beijing University of TechnologyBeijing 100124China Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment Princeton UniversityPrincetonNJ 08544USA

The slow initiation of anammox for treating typical domestic wastewater and the relatively high footprint of wastewater treatment infrastructures are major concerns for practical wastewater treatment systems.Herein,a 300 m^(3)/d hybrid biofilm reactor(HBR)process was developed and operated with a short hydraulic retention time(HRT)of 8 h.The analysis of the bacterial community demonstrated that anammox were enriched in the anoxic zone of the HBR process.The percentage abundance of Candidatus Brocadia in the total bacterial community of the anoxic zone increased from 0 at Day 1 to 0.33%at Day 130 and then to 2.89%at Day 213.Based upon the activity of anammox bacteria,the removal of ammonia nitrogen(NH_(4)^(+)-N)in the anoxic zone was approximately 15%.This showed that the nitrogen transformation pathway was enhanced in the HBR system through partial anammox process in the anoxic zone.The final effluent contained 12 mg/L chemical oxygen demand(COD),0.662 mg/L NH_(4)^(+)-N,7.2 mg/L total nitrogen(TN),and 6 mg/L SS,indicating the effectiveness of the HBR process for treating real domestic wastewater.

关键词： Full scale anammox Domestic wastewater Biofilm Candidatus Brocadia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Simultaneous Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic biological nitrogen removal

引用

Frontiers of Environmental Science & Engineering 2022年第7期16卷 87-99页

作者： Yingbin Hu Ning Li Jin Jiang Yanbin Xu Xiaonan Luo Jie Cao Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou510006China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou510006China

Ferric iron reduction coupled with anaerobic ammonium oxidation(Feammox)is a novel ferric-dependent autotrophic process for biological nitrogen removal(BNR)that has attracted increasing attention due to its low organic carbon requirement.However,extracellular electron transfer limits the nitrogen transformation rate.In this study,activated carbon(AC)was used as an electron shuttle and added into an integrated autotrophic BNR system consisting of Feammox and anammox processes.The nitrogen removal performance,nitrogen transformation pathways and microbial communities were investigated during 194 days of operation.During the stable operational period(days 126–194),the total nitrogen(TN)removal efficiency reached 82.9%±6.8%with a nitrogen removal rate of 0.46±0.04 kg-TN/m^(3)/d.The contributions of the Feammox,anammox and heterotrophic denitrification pathways to TN loss accounted for 7.5%,89.5%and 3.0%,respectively.Batch experiments showed that AC was more effective in accelerating the Feammox rate than the anammox rate.X-ray photoelectron spectroscopy(XPS)analyses showed the presence of ferric iron(Fe(III))and ferrous iron(Fe(II))in secondary minerals.X-ray diffraction(XRD)patterns indicated that secondary iron species were formed on the surface of iron-AC carrier(Fe/AC),and Fe(III)was primarily reduced by ammonium in the Feammox process.The phyla Anaerolineaceae(0.542%)and Candidatus Magasanikbacteria(0.147%)might contribute to the Feammox process,and Candidatus Jettenia(2.10%)and Candidatus Brocadia(1.18%)were the dominative anammox phyla in the bioreactor.Overall,the addition of AC provided an effective way to enhance the autotrophic BNR process by integrating Feammox and anammox.

关键词： Feammox anammox Extracellular electron transfer Electron shuttle Activated carbon

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of Nitrite Production Pathway in Integrated Partial Denitrification/anammox Process via Isotope Labelling Technique and the Relevant Microbial Communities

引用

China Petroleum Processing & Petrochemical Technology 2022年第1期24卷 129-134页

作者： Li Yanzhe Gai Jianing Zhang Xiaofei Zhao dongfeng Guo Yadong Yu Gengxing Zhao Chaocheng Liu Fang Zhao Ruiyu Liu Chunshuang College of Chemical Engineering China University of PetroleumQingdao 266580 Research Institute of Safety and Environmental Technology Beijing 102206 Harbin Jianshi Technology Co. LtdHarbin 150040

In this study,the nitrogen removal performance of partial denitrificaiton/anammox(PDA)process was investigated by using an UASB reactor.High total nitrogen(TN)removal efficiency(91.97%)was achieved at an influent nitrogen loading rate of 0.64 kg/(m3·d).anammox bacteria did execute the function of converting nitrate to nitrite in PDA system according to ^(15)N isotope labeling experiments and the contribution was approximately 36.3%.Candidatus_Brocadia,Candidatus_Kuenenia and Thauera were functional strains for anammox and denitrification process,respectively.Thauera and Candidatus_Brocadia were more important for TN removal at high loading rates(0.64 kg/(m3·d)).This result can provide a theoretical and technical foundation for the application of the PDA process.

关键词： partial-denitrification anammox 15N isotope labeling experiments biological nitrogen removal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

含氟化合物PFBS长期作用厌氧氨氧化对污泥理化性质的影响

引用

广东化工 2024年第6期51卷 91-94页

作者：郭锦林孙洪伟孙雪宁李晓丽舒泉城徐心怡高中鲁刘玉灿烟台大学土木工程学院山东烟台264000 烟台大学环境与材料工程学院山东烟台264000

全氟烷基和多氟烷基物质(PFASs)是一种合成的有机含氟化合物,以其优异的稳定性、疏水性和疏油性而闻名,因此被广泛应用于化工产业。由于其持久性、对地球生命的毒性、生物蓄积倾向以及对健康和生态的不利影响而备受关注。本研究选择了PF... 详细信息

全氟烷基和多氟烷基物质(PFASs)是一种合成的有机含氟化合物,以其优异的稳定性、疏水性和疏油性而闻名,因此被广泛应用于化工产业。由于其持久性、对地球生命的毒性、生物蓄积倾向以及对健康和生态的不利影响而备受关注。本研究选择了PFASs的典型化合物--全氟丁烷磺酸(PFBS),来研究anammox在长期暴露于不同浓度的PFBS时的反应。设置不同的PFBS浓度(200 ng/L、100μg/L、50 mg/L)对污泥的理化性质产生影响。结果表明,随着PFBS浓度的增加污泥絮体被破坏,代谢产物发生变化,甚至是导致微生物的死亡凋零。

关键词： PFBS anammox 活性污泥理化性质

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of different fertilization practices on anammox activity,abundance,and community compositions in a paddy soil

引用

Soil Ecology Letters 2022年第3期4卷 254-263页

作者： Geng Sun Mei Sun Zunchang Luo Chao Li Xiaoping Xiao Xiaojing Li Junjie Zhong Hua Wang San’an Nie College of Resources and Environment Hunan Agricultural UniversityChangsha 410125China Hunan Soil and Fertilizer Institute Changsha 410125China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

The return of crop residue and green manure into agricultural soil is known to be important agricultural management strategies,yet how they affect the anammox process remains poorly characterized.A field experiment containing four treatments:chemical fertilizer(F),F plus rice straw(FS),FS plus green manure(FSM),FSM with integrated management(FSMM),was performed to examine the effects of incorporation of rice straw and green manure residues on anammox.The results showed that the anammox activities in FS and FSM treatments(0.65 and 0.80 nmol N g^(–1)soil h^(–1),respectively)were significantly lower than those in F and FSMM treatments(1.60 and 1.28 nmol N g^(–1)soil h^(–1),respectively).anammox contributed 4.07%-4.95%of total N loss in soil incorporated with residues,lower than soil treated with chemical fertilizer only(9.13%),the remaining being due to denitrification.However,the abundance of the hzsB gene(the hydrazine synthaseβ-subunit gene)in FS and FSM treatments(1.13106 and 1.18106 copies g^(–1)soil)were significantly higher than soil using chemical fertilizer only(7.49105 copies g^(–1)soil)while showed no significant difference with FSMM treatment(8.81105 copies g^(–1)soil).Illumina sequencing indicated that Brocadia was the dominant anammox genus,following by Scalindua and Kuenenia.anammox bacterial diversity was altered after 4-year incorporation of rice straw and green manure,as shown byα-diversity indices.We concluded that rice straw and green manure incorporated with mineral fertilizer reduce N removal from paddy soil in terms of anammox in spite of stimulating anammox bacterial growth.

关键词： anammox Rice straw Green manure Scalindua N loss

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhancement of extracellular Cr(Ⅵ) reduction for anammox recovery using hydrazine: performance, pathways, and mechanism

引用

Frontiers of Environmental Science & Engineering 2023年第9期17卷 233-243页

作者： Caiyan Qu Lushan Li Fan Feng Kainian Jiang Xing Wu Muchuan Qin Jia Tang Xi Tang Ruiyang Xiao Di Wu Chongjian Tang School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China Yongzhou Environmental Monitoring Station Yongzhou 425000China Ghent University Global Campus IncheonRepublic of KoreaDepartment of Green Chemistry and TechnologyGhent Universityand Centre for Advanced Process Technology for Urban Resource Recovery(CAPTURE)Ghent 9000Belgium

The hexavalent chromium(Cr(Ⅵ))would frequently impose inhibition to anaerobic ammonium oxidation(anammox)process,hindering the efficiency of nitrogen removal in wastewater treatment.Hydrazine(N2H4),which is an intermediate product of anammox,participates in intracellular metabolism and extracellular Cr(Ⅵ)reduction.However,the roles of N_(2)H_(4)-induced intracellular metabolism and extracellular reduction in nitrogen removal under Cr(Ⅵ)stress remain unclear.The addition of 3.67 mg/L of N2H4 increased the anammox activity by 17%.As an intermediate,N2H4 enhanced anammox metabolism by increasing the heme c content and electron transfer system activity.As a reductant,N_(2)H_(4) accelerated the reduction of c-Cyts-mediated extracellular Cr(Ⅵ)to the less toxic Cr(Ⅲ).Extracellular Cr(Ⅲ)accounts for 74%of the total Cr in a Cr(Ⅵ)-stressed anammox consortia.These findings highlight that N_(2)H_(4)-induced extracellular Cr(Ⅵ)reduction is the dominant mechanism for the survival of anammox consortia.We also found that N_(2)H_(4) increased the production of extracellular polymeric substances to sequester excessive Cr(Ⅵ)and produced Cr(Ⅲ).Taken together,the study findings suggest a potential strategy for enhancing nitrogen removal from ammonium-rich wastewater contaminated with Cr(Ⅵ).

关键词： Extracellular Cr(VI)reduction Electron transfer anammox Hydrazine Cr(VI)inhibition

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：