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You QG, Wang JH, Qi GX, Zhou YM, Guo ZW, Shen Y, Gao X. Anammox and partial denitrification coupling: a review. RSC Adv 2020; 10:12554-12572. [PMID: 35497592 PMCID: PMC9051081 DOI: 10.1039/d0ra00001a] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 03/12/2020] [Indexed: 12/02/2022] Open
Abstract
As a new wastewater biological nitrogen removal process, anammox and partial denitrification coupling not only plays a significant role in the nitrogen cycle, but also holds high engineering application value. Because anammox and some denitrifying bacteria are coupled under harsh living conditions, certain operating conditions and mechanisms of the coupling process are not clear; thus, it is more difficult to control the process, which is why the process has not been widely applied. This paper analyzes the research focusing on the coupling process in recent years, including anammox and partial denitrification coupling process inhibitors such as nitrogen (NH4+, NO2−), organics (toxic and non-toxic organics), and salts. The mechanism of substrate removal in anammox and partial denitrification coupling nitrogen removal is described in detail. Due to the differences in process methods, experimental conditions, and sludge choices between the rapid start-up and stable operation stages of the reactor, there are significant differences in substrate inhibition. Multiple process parameters (such as pH, temperature, dissolved oxygen, redox potential, carbon-to-nitrogen ratio, and sludge) can be adjusted to improve the coupling of anammox and partial denitrification to modify nitrogen removal performance. As a new wastewater biological nitrogen removal process, anammox and partial denitrification coupling not only plays a significant role in the nitrogen cycle, but also holds high engineering application value.![]()
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Affiliation(s)
- Qing-Guo You
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Jian-Hui Wang
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Gao-Xiang Qi
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Yue-Ming Zhou
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Zhi-Wei Guo
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Yu Shen
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
| | - Xu Gao
- National Research Base of Intelligent Manufacturing Service
- Chongqing Technology and Business University
- Chongqing 400067
- China
- Chongqing South-to-Thais Environmental Protection Technology Research Institute Co., Ltd
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Influence of Dissolved-Aluminum Concentration on Sulfur-Oxidizing Bacterial Activity in the Biodeterioration of Concrete. Appl Environ Microbiol 2019; 85:AEM.00302-19. [PMID: 31126946 DOI: 10.1128/aem.00302-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/27/2019] [Indexed: 11/20/2022] Open
Abstract
Several studies undertaken on the biodeterioration of concrete sewer infrastructures have highlighted the better durability of aluminate-based materials. The bacteriostatic effect of aluminum has been suggested to explain the increase in durability of these materials. However, no clear demonstration of the negative effect of aluminum on cell growth has been yet provided in the literature. In the present study, we sought to investigate the inhibitory potential of dissolved aluminum on nonsterile microbial cultures containing sulfur-oxidizing microorganisms. Both kinetic (maximum specific growth rate) and stoichiometric (oxygen consumption yield) parameters describing cells activity were accurately determined by using respirometry measurements coupled with modeled data obtained from fed-batch cultures run for several days at pH below 4 and with increasing total aluminum (Altot) concentrations from 0 to 100 mM. Short-term inhibition was observed for cells poorly acclimated to high salinity. However, inhibition was significantly attenuated for cells grown on mortar substrate. Moreover, after a rapid adaptation, and for an Altot concentration up to 100 mM, both kinetic and stoichiometric growth parameters remained similar to those obtained in control culture conditions where no aluminum was added. This argued in favor of the impact of ionic strength change on the growth of sulfur-oxidizing microorganism rather than an inhibitory effect of dissolved aluminum. Other assumptions must therefore be put forward in order to explain the better durability of cement containing aluminate-based materials in sewer networks. Among these assumptions, the influence of physical or chemical properties of the material (phase reactivity, porosity, etc.) might be proposed.IMPORTANCE Biodeterioration of cement infrastructures represents 5 to 20% of observed deteriorations within the sewer network. Such biodeterioration events are mainly due to microbial sulfur-oxidizing activity which produces sulfuric acid able to dissolve cementitious material. Calcium aluminate cement materials are more resistant to biodeterioration compared to the commonly used Portland cement. Several theories have been suggested to describe this resistance, and the bacteriostatic effect of aluminum seems to be the most plausible explanation. However, results reported by the several studies on this exact topic are highly controversial. This present study provides a comprehensive analysis of the influence of dissolved aluminum on growth parameters of long-term cultures of sulfur-oxidizing bacterial consortia sampled from different origins. Kinetic and stoichiometric parameters estimated by respirometry measurements and modeling showed that total dissolved-aluminum concentrations up to 100 mM were not inhibitory, but it is more likely that a sudden increase in the ionic strength affects cell growth. Therefore, it appears that the bacteriostatic effect of aluminum on microbial growth cannot explain the better durability of aluminate based cementitious materials.
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Responses of Acidithiobacillus thiooxidans A01 to Individual and Joint Nickel (Ni2+) and Ferric (Fe3+). MINERALS 2019. [DOI: 10.3390/min9020082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Acidithiobacillus thiooxidans A01 is widely used in bioleaching processes and commonly thrives in most metal-rich environments. However, interactions between different heavy metals remain obscure. In this study, we elaborated the effect of ferric iron on the growth and gene expression of At. thiooxidans A01 under the stress of nickel. The results showed that 600 mM Ni2+ completely inhibited the growth and sulfur metabolism of At. thiooxidans A01. However, trace amounts of Fe3+ (0.5 mM) facilitated the growth of At. thiooxidans A01 in the presence of 600 mM Ni2+. With the addition of 5 mM Fe3+, the maximum cell density reached 1.84 × 108 cell/mL, and pH value was 0.95. In addition, metal resistance-related and sulfur metabolism genes were significantly up regulated with extra ferric iron. Taking the whole process into account, the promoting effect of Fe3+ addition can be attributed to the following: (1) alleviation of the effects of Ni2+ toxicity and restoring the growth of At. thiooxidans A01, (2) a choice of multiple pathways to export nickel ion and producing precursor of chelators of heavy metals. This can suggest that microorganisms may widely exhibit metabolic activity in iron-rich environments with heavy metals. Our study will facilitate the technique development for the processing of ore bodies with highly challenging ore compositions.
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"Use of acidophilic bacteria of the genus Acidithiobacillus to biosynthesize CdS fluorescent nanoparticles (quantum dots) with high tolerance to acidic pH". Enzyme Microb Technol 2016; 95:217-224. [PMID: 27866618 DOI: 10.1016/j.enzmictec.2016.09.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/12/2016] [Accepted: 09/12/2016] [Indexed: 11/21/2022]
Abstract
The use of bacterial cells to produce fluorescent semiconductor nanoparticles (quantum dots, QDs) represents a green alternative with promising economic potential. In the present work, we report for the first time the biosynthesis of CdS QDs by acidophilic bacteria of the Acidithiobacillus genus. CdS QDs were obtained by exposing A. ferrooxidans, A. thiooxidans and A. caldus cells to sublethal Cd2+ concentrations in the presence of cysteine and glutathione. The fluorescence of cadmium-exposed cells moves from green to red with incubation time, a characteristic property of QDs associated with nanocrystals growth. Biosynthesized nanoparticles (NPs) display an absorption peak at 360nm and a broad emission spectra between 450 and 650nm when excited at 370nm, both characteristic of CdS QDs. Average sizes of 6 and 10nm were determined for green and red NPs, respectively. The importance of cysteine and glutathione on QDs biosynthesis in Acidithiobacillus was related with the generation of H2S. Interestingly, QDs produced by acidophilic bacteria display high tolerance to acidic pH. Absorbance and fluorescence properties of QDs was not affected at pH 2.0, a condition that totally inhibits the fluorescence of QDs produced chemically or biosynthesized by mesophilic bacteria (stable until pH 4.5-5.0). Results presented here constitute the first report of the generation of QDs with improved properties by using extremophile microorganisms.
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Cr(VI) removal from aqueous solution by thermophilic denitrifying bacterium Chelatococcus daeguensis TAD1 in the presence of single and multiple heavy metals. J Microbiol 2016; 54:602-610. [DOI: 10.1007/s12275-016-5295-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 07/22/2016] [Accepted: 07/26/2016] [Indexed: 11/25/2022]
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Wang Y, Chen H, Liu YX, Ren RP, Lv YK. Effect of temperature, salinity, heavy metals, ammonium concentration, pH and dissolved oxygen on ammonium removal by an aerobic nitrifier. RSC Adv 2015. [DOI: 10.1039/c5ra13318a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An aerobic nitrifier WY-01 was identified asAlcaligenes faecalisby its 16S rRNA gene sequence analysis. It could remove ammonium effectively in varying physico-chemical conditions, such as low temperature, high salinity and high ammonium loads.
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Affiliation(s)
- Ying Wang
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- China
| | - Hu Chen
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- China
| | - Yu-Xiang Liu
- College of Environmental Science and Engineering
- Taiyuan University of Technology
- Taiyuan 030024
- China
| | - Rui-Peng Ren
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- China
| | - Yong-Kang Lv
- Key Laboratory of Coal Science and Technology
- Ministry of Education and Shanxi Province
- Taiyuan University of Technology
- Taiyuan 030024
- China
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Magnin JP, Gondrexon N, Willison JC. Zinc biosorption by the purple non-sulfur bacterium Rhodobacter capsulatus. Can J Microbiol 2014; 60:829-37. [DOI: 10.1139/cjm-2014-0231] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This paper presents the first report providing information on the zinc (Zn) biosorption potentialities of the purple non-sulfur bacterium Rhodobacter capsulatus. The effects of various biological, physical, and chemical parameters on Zn biosorption were studied in both the wild-type strain B10 and a strain, RC220, lacking the endogenous plasmid. At an initial Zn concentration of 10 mg·L−1, the Zn biosorption capacity at pH 7 for bacterial biomass grown in synthetic medium containing lactate as carbon source was 17 and 16 mg Zn·(g dry mass)–1 for strains B10 and RC220, respectively. Equilibrium was achieved in a contact time of 30–120 min, depending on the initial Zn concentration. Zn sorption by live biomass was modelled, at equilibrium, according to the Redlich–Peterson and Langmuir isotherms, in the range of 1–600 mg Zn·L−1. The wild-type strain showed a maximal Zn uptake capacity (Qm) of 164 ± 8 mg·(g dry mass)−1 and an equilibrium constant (Kads) of 0.017 ± 0.00085 L·(mg Zn)−1, compared with values of 73.9 mg·(g dry mass)−1 and 0.361 L·mg−1 for the strain lacking the endogenous plasmid. The Qm value observed for R. capsulatus B10 is one of the highest reported in the literature, suggesting that this strain may be useful for Zn bioremediation. The lower Qm value and higher equilibrium constant observed for strain RC220 suggest that the endogenous plasmid confers an enhanced biosorption capacity in this bacterium, although no genetic determinants for Zn resistance appear to be located on the plasmid, and possible explanations for this are discussed.
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Affiliation(s)
- Jean-Pierre Magnin
- Université Grenoble Alpes, Laboratoire d’electrochimie et de physicochimie des matériaux et des interfaces (LEPMI), F-38000 Grenoble, France
- Centre national de la recherche scientifique (CNRS), LEPMI, F-38000 Grenoble, France
| | - Nicolas Gondrexon
- Université Grenoble Alpes, LRP, F-38000 Grenoble, France
- CNRS, Laboratoire rhéologie et procédés (LRP), F-38000 Grenoble, France
| | - John C. Willison
- Université Grenoble Alpes, Institut de recherches en technologies et sciences pour le vivant – Laboratoire de chimie et biologie des métaux (iRTSV–LCBM), F-38000, France
- CNRS, iRTSV–LCBM, F-38000 Grenoble, France
- Commissariat à l’énergie atomique (CEA), iRTSV–LCBM, F-38000 Grenoble, France
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Chen M, Wang W, Feng Y, Zhu X, Zhou H, Tan Z, Li X. Impact resistance of different factors on ammonia removal by heterotrophic nitrification-aerobic denitrification bacterium Aeromonas sp. HN-02. BIORESOURCE TECHNOLOGY 2014; 167:456-461. [PMID: 25006021 DOI: 10.1016/j.biortech.2014.06.001] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 05/31/2014] [Accepted: 06/02/2014] [Indexed: 06/03/2023]
Abstract
To give reference for the application of heterotrophic nitrification-aerobic denitrification bacteria in actual wastewater treatment, the impact resistance of extreme pH, low temperature, heavy metals and high salinity on ammonia removal by a typical heterotrophic nitrifying-aerobic denitrifying bacterium Aeromonas sp. HN-02 was investigated. The results showed that HN-02 demonstrated strong acid- and alkali-resistance. In addition, it remained active at 5°C, and the removal rates of ammonia and COD were 0.90 mg L(-1)h(-1) and 22.34 mg L(-1)h(-1), respectively. Under the same extent of immediate temperature drop, the temperature correction coefficients of ammonia, COD removal rates and cell growth rate were close. Moreover, HN-02 could survive in the solution containing 0.5 mg L(-1) Cu(2+) or 8 mg L(-1) Zn(2+), or 0.5 mg L(-1) of equivalent Cu(2+)-Zn(2+). Furthermore, efficient ammonia removal was retained at salinity below 20 g L(-1), thus it could be identified as a halotolerant bacterium. At last, stronger stress resulted in higher ΔCOD/ΔTN ratio.
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Affiliation(s)
- Maoxia Chen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Wenchao Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Ye Feng
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Xiaohua Zhu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Houzhen Zhou
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
| | - Zhouliang Tan
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China.
| | - Xudong Li
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China; Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China
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Acuña LG, Cárdenas JP, Covarrubias PC, Haristoy JJ, Flores R, Nuñez H, Riadi G, Shmaryahu A, Valdés J, Dopson M, Rawlings DE, Banfield JF, Holmes DS, Quatrini R. Architecture and gene repertoire of the flexible genome of the extreme acidophile Acidithiobacillus caldus. PLoS One 2013; 8:e78237. [PMID: 24250794 PMCID: PMC3826726 DOI: 10.1371/journal.pone.0078237] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 09/10/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Acidithiobacillus caldus is a sulfur oxidizing extreme acidophile and the only known mesothermophile within the Acidithiobacillales. As such, it is one of the preferred microbes for mineral bioprocessing at moderately high temperatures. In this study, we explore the genomic diversity of A. caldus strains using a combination of bioinformatic and experimental techniques, thus contributing first insights into the elucidation of the species pangenome. PRINCIPAL FINDINGS Comparative sequence analysis of A. caldus ATCC 51756 and SM-1 indicate that, despite sharing a conserved and highly syntenic genomic core, both strains have unique gene complements encompassing nearly 20% of their respective genomes. The differential gene complement of each strain is distributed between the chromosomal compartment, one megaplasmid and a variable number of smaller plasmids, and is directly associated to a diverse pool of mobile genetic elements (MGE). These include integrative conjugative and mobilizable elements, genomic islands and insertion sequences. Some of the accessory functions associated to these MGEs have been linked previously to the flexible gene pool in microorganisms inhabiting completely different econiches. Yet, others had not been unambiguously mapped to the flexible gene pool prior to this report and clearly reflect strain-specific adaption to local environmental conditions. SIGNIFICANCE For many years, and because of DNA instability at low pH and recurrent failure to genetically transform acidophilic bacteria, gene transfer in acidic environments was considered negligible. Findings presented herein imply that a more or less conserved pool of actively excising MGEs occurs in the A. caldus population and point to a greater frequency of gene exchange in this econiche than previously recognized. Also, the data suggest that these elements endow the species with capacities to withstand the diverse abiotic and biotic stresses of natural environments, in particular those associated with its extreme econiche.
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Affiliation(s)
- Lillian G. Acuña
- Fundación Ciencia & Vida, Santiago, Chile
- Facultad de Ciencias Biologicas, Universidad Andres Bello, Santiago, Chile
| | - Juan Pablo Cárdenas
- Fundación Ciencia & Vida, Santiago, Chile
- Facultad de Ciencias Biologicas, Universidad Andres Bello, Santiago, Chile
| | - Paulo C. Covarrubias
- Fundación Ciencia & Vida, Santiago, Chile
- Facultad de Ciencias Biologicas, Universidad Andres Bello, Santiago, Chile
| | | | | | | | - Gonzalo Riadi
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingenieria, Universidad de Talca, Talca, Chile
| | | | - Jorge Valdés
- Center for Systems Biotechnology, Fraunhofer Chile, Santiago, Chile
| | - Mark Dopson
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Douglas E. Rawlings
- Department of Microbiology, University of Stellenbosch, Private Bag X1, Matieland, South Africa
| | - Jillian F. Banfield
- Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, California, United States of America
| | - David S. Holmes
- Fundación Ciencia & Vida, Santiago, Chile
- Facultad de Ciencias Biologicas, Universidad Andres Bello, Santiago, Chile
| | - Raquel Quatrini
- Fundación Ciencia & Vida, Santiago, Chile
- Facultad de Ciencias Biologicas, Universidad Andres Bello, Santiago, Chile
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