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Wang D, Zuo Y, Liu N, Yu J, Qiu C. Stability of pure oxygen aeration-activated sludge system under non-steady food-to-microorganism ratio conditions during petrochemical wastewater treatment. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 56:21-31. [PMID: 33054534 DOI: 10.1080/10934529.2020.1833599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 09/26/2020] [Accepted: 10/03/2020] [Indexed: 06/11/2023]
Abstract
This study investigates the stability of a pure oxygen aeration-activated sludge system for petrochemical wastewater treatment under high organic concentration and non-steady food-to-microorganism (F/M) ratio conditions. Sludge settling characteristics maintained relatively stable conditions with an F/M ratio variation from 0.15 ± 0.04 to 0.33 ± 0.07 kg COD/kg MLSS⋅d, while the excess F/M ratio (0.44 ± 0.16 kg COD/kg MLSS⋅d) resulted in deterioration of the organic removal and sludge-water separation performances. Loosely bound extracellular polymeric substances (EPS) showed more significant effect on sludge settleability than the tightly bound EPS. The genus Hydrogenophaga was related to organic removal performance, while Zoogloea and Chitinophaga were related to the effluent quality of suspended solids. The excess F/M ratio also caused an increase in Zoogloea and Chitinophaga, whereas the toxicity of petrochemical wastewater resulted in decreased abundance of Hydrogenophaga. These changes caused deterioration of the organic removal and sludge-water separation performances.
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Affiliation(s)
- Dong Wang
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Yuanyuan Zuo
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Nannan Liu
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Jingjie Yu
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Chunsheng Qiu
- Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
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Skouteris G, Rodriguez-Garcia G, Reinecke SF, Hampel U. The use of pure oxygen for aeration in aerobic wastewater treatment: A review of its potential and limitations. BIORESOURCE TECHNOLOGY 2020; 312:123595. [PMID: 32506043 DOI: 10.1016/j.biortech.2020.123595] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/24/2020] [Accepted: 05/25/2020] [Indexed: 05/06/2023]
Abstract
In aerobic wastewater treatment, aeration is the most critical element of the treatment system. It supplies microorganisms with the required dissolved oxygen, maintains solids in suspension and, in membrane bioreactors, it controls fouling. However, conventional activated sludge is limited to the treatment of low strength wastewaters, as higher loadings require both higher biomass and higher dissolved oxygen concentrations. By replacing air with pure oxygen, oxygen transfer rates increase at lower flowrates. In this work, the potential and limitations of pure oxygen aeration are reviewed. The effect of the system's operational parameters and the mixed liquor characteristics on oxygen transfer, and vice versa, are determined. Pure oxygen treats higher loadings without compromising effluent quality. Fine bubbles are more efficient in oxygen transfer due to their increased contact area. However, pure oxygen is not always essential, so it is recommended to be restricted to applications where air is not adequate.
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Affiliation(s)
- G Skouteris
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.
| | - G Rodriguez-Garcia
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - S F Reinecke
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - U Hampel
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany; Chair of Imaging Techniques in Energy and Process Engineering, Technische Universität Dresden, 01062 Dresden, Germany
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Reutilization of Green Waste as Compost for Soil Improvement in the Afforested Land of the Beijing Plain. SUSTAINABILITY 2018. [DOI: 10.3390/su10072376] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bhattacharjee AS, Motlagh AM, Gilcrease EB, Islam MI, Casjens SR, Goel R. Complete genome sequence of lytic bacteriophage RG-2014 that infects the multidrug resistant bacterium Delftia tsuruhatensis ARB-1. Stand Genomic Sci 2017; 12:82. [PMID: 29270250 PMCID: PMC5735904 DOI: 10.1186/s40793-017-0290-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 11/24/2017] [Indexed: 01/10/2023] Open
Abstract
A lytic bacteriophage RG-2014 infecting a biofilm forming multidrug resistant bacterium Delftia tsuruhatensis strain ARB-1 as its host was isolated from a full-scale municipal wastewater treatment plant. Lytic phage RG-2014 was isolated for developing phage based therapeutic approaches against Delftia tsuruhatensis strain ARB-1. The strain ARB-1 belongs to the Comamonadaceae family of the Betaproteobacteria class. RG-2014 was characterized for its type, burst size, latent and eclipse time periods of 150 ± 9 PFU/cell, 10-min, <5-min, respectively. The phage was found to be a dsDNA virus belonging to the Podoviridae family. It has an isometric icosahedrally shaped capsid with a diameter of 85 nm. The complete genome of the isolated phage was sequenced and determined to be 73.8 kbp in length with a G + C content of 59.9%. Significant similarities in gene homology and order were observed between Delftia phage RG-2014 and the E. coli phage N4 indicating that it is a member of the N4-like phage group.
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Affiliation(s)
- Ananda Shankar Bhattacharjee
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT USA.,Bigelow Laboratory for Ocean Science, 60 Bigelow Dr., East Boothbay, ME USA
| | - Amir Mohaghegh Motlagh
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT USA.,Department of Civil, Environmental, and Construction Engineering, University of Central Florida, 12800 Pegasus Dr., Room 340, Orlando, FL USA
| | - Eddie B Gilcrease
- Division of Microbiology and Immunology, Pathology Department, University of Utah School of Medicine, Salt Lake City, UT USA
| | - Md Imdadul Islam
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT USA
| | - Sherwood R Casjens
- Division of Microbiology and Immunology, Pathology Department, University of Utah School of Medicine, Salt Lake City, UT USA.,Department of Biology, University of Utah, Salt Lake City, UT USA
| | - Ramesh Goel
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT USA
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Rodriguez-Sanchez A, Leyva-Diaz JC, Gonzalez-Martinez A, Poyatos JM. Linkage of microbial kinetics and bacterial community structure of MBR and hybrid MBBR-MBR systems to treat salinity-amended urban wastewater. Biotechnol Prog 2017; 33:1483-1495. [DOI: 10.1002/btpr.2513] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 06/04/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Alejandro Rodriguez-Sanchez
- Institute of Water Research; University of Granada; Granada 18071 Spain
- Department of Civil Engineering, School of Civil Engineering; University of Granada; Granada 18071 Spain
| | - Juan Carlos Leyva-Diaz
- Institute of Water Research; University of Granada; Granada 18071 Spain
- Department of Civil Engineering, School of Civil Engineering; University of Granada; Granada 18071 Spain
| | | | - Jose Manuel Poyatos
- Institute of Water Research; University of Granada; Granada 18071 Spain
- Department of Civil Engineering, School of Civil Engineering; University of Granada; Granada 18071 Spain
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Kreutz JA, Böckenhüser I, Wacht M, Fischer K. A 1-year study of the activities of seven hydrolases in a communal wastewater treatment plant: trends and correlations. Appl Microbiol Biotechnol 2016; 100:6903-6915. [DOI: 10.1007/s00253-016-7540-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/02/2016] [Accepted: 04/08/2016] [Indexed: 11/28/2022]
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Leyva-Díaz JC, González-Martínez A, Calderón K, González-López J, Muñío MDM, Poyatos JM. Microbial Kinetics and Enzymatic Activities in Hybrid Moving-Bed Biofilm Reactor-Membrane Bioreactor Systems. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201400750] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bhattacharjee AS, Choi J, Motlagh AM, Mukherji ST, Goel R. Bacteriophage therapy for membrane biofouling in membrane bioreactors and antibiotic-resistant bacterial biofilms. Biotechnol Bioeng 2015; 112:1644-54. [PMID: 25728819 DOI: 10.1002/bit.25574] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 01/06/2015] [Accepted: 02/13/2015] [Indexed: 11/06/2022]
Abstract
To demonstrate elimination of bacterial biofilm on membranes to represent wastewater treatment as well as biofilm formed by antibiotic-resistant bacterial (ARB) to signify medical application, an antibiotic-resistant bacterium and its lytic bacteriophage were isolated from a full-scale wastewater treatment plant. Based on gram staining and complete 16 S rDNA sequencing, the isolated bacterium showed a more than 99% homology with Delftia tsuruhatensis, a gram-negative bacterium belonging to β-proteobacteria. The Delftia lytic phage's draft genome revealed the phage to be an N4-like phage with 59.7% G + C content. No transfer RNAs were detected for the phage suggesting that the phage is highly adapted to its host Delftia tsuruhatensis ARB-1 with regard to codon usage, and does not require additional tRNAs of its own. The gene annotation of the Delftia lytic phage found three different components of RNA polymerase (RNAP) in the genome, which is a typical characteristic of N4-like phages. The lytic phage specific to D. tsuruhatensis ARB-1 could successfully remove the biofilm formed by it on a glass slide. The water flux through the membrane of a prototype lab-scale membrane bioreactor decreased from 47 L/h m(2) to ∼15 L/h m(2) over 4 days due to a biofilm formed by D. tsuruhatensis ARB-1. However, the flux increased to 70% of the original after the lytic phage application. Overall, this research demonstrated phage therapy's great potential to solve the problem of membrane biofouling, as well as the problems posed by pathogenic biofilms in external wounds and on medical instruments.
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Affiliation(s)
| | - Jeongdong Choi
- Department of Environmental Engineering, Korea National University of Transportation, Chungju, South Korea
| | - Amir Mohaghegh Motlagh
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, USA
| | - Sachiyo T Mukherji
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, USA
| | - Ramesh Goel
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, USA.
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Gonzalez-Martinez A, Rodriguez-Sanchez A, Martinez-Toledo MV, Garcia-Ruiz MJ, Hontoria E, Osorio-Robles F, Gonzalez-Lopez J. Effect of ciprofloxacin antibiotic on the partial-nitritation process and bacterial community structure of a submerged biofilter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 476-477:276-287. [PMID: 24468502 DOI: 10.1016/j.scitotenv.2014.01.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Revised: 01/05/2014] [Accepted: 01/05/2014] [Indexed: 06/03/2023]
Abstract
A partial-nitritation bench-scale submerged biofilter was used for the treatment of synthetic wastewater containing a high concentration of ammonium in order to study the influence of the antibiotic ciprofloxacin on the partial-nitritation process and biodiversity of the bacterial community structure. The influence of ciprofloxacin was evaluated in four partial-nitritation bioreactors working in parallel, which received sterile synthetic wastewater amended with 350 ng/L of ciprofloxacin (Experiment 1), synthetic wastewater without ciprofloxacin (Experiment 2), synthetic wastewater amended with 100 ng/L of ciprofloxacin (Experiment 3) and synthetic wastewater amended with 350 ng/L of ciprofloxacin (Experiment 4). The concentration of 100 ng/L of antibiotics demonstrated that the partial-nitritation process, microbial biomass and bacterial structure generated by tag-pyrosequencing adapted progressively to the conditions in the bioreactor. However, high concentrations of ciprofloxacin (350 ng/L) induced a decay of the partial-nitritation process, while the total microbial biomass was increased. Within the same experiment, the bacterial community experienced sequential shifts with a clear reduction of the ammonium oxidation bacteria (AOB) and an evident increase of Commamonas sp., which have been previously reported to be ciprofloxacin-resistant. Our study suggests the need for careful monitoring of the concentration of antibiotics such as ciprofloxacin in partial-nitritation bioreactors, in order to choose and maintain the most appropriate conditions for the proper operation of the system.
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Affiliation(s)
- A Gonzalez-Martinez
- Department of Civil Engineering, University of Granada, Campus de Fuentenueva, s/n, 18071 Granada, Spain.
| | - A Rodriguez-Sanchez
- Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071 Granada, Spain
| | - M V Martinez-Toledo
- Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071 Granada, Spain
| | - M-J Garcia-Ruiz
- Department of Civil Engineering, University of Granada, Campus de Fuentenueva, s/n, 18071 Granada, Spain
| | - E Hontoria
- Department of Civil Engineering, University of Granada, Campus de Fuentenueva, s/n, 18071 Granada, Spain
| | - F Osorio-Robles
- Department of Civil Engineering, University of Granada, Campus de Fuentenueva, s/n, 18071 Granada, Spain
| | - J Gonzalez-Lopez
- Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071 Granada, Spain
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