1
|
Liang X, Wu M, Yang Y, Liu D, Li X. Shale gas hydraulic fracturing flowback fluid treatment using a modified vortex flocculation reactor: Effects of the axial and tangential inlet angles. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
2
|
García-Ávila F, Tenesaca-Pintado D, Novoa-Zamora F, Alfaro-Paredes EA, Avilés-Añazco A, Guanuchi-Quito A, Tonon-Ordoñez MD, Zhindón-Arévalo C. Vertical tubular flocculator: Alternative technology for the improvement of drinking water treatment processes in rural areas. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 331:117342. [PMID: 36696761 DOI: 10.1016/j.jenvman.2023.117342] [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: 11/05/2022] [Revised: 01/10/2023] [Accepted: 01/18/2023] [Indexed: 06/17/2023]
Abstract
The guarantee of access to safe drinking water for rural communities is a great challenge due to the increase in contamination and deterioration of water sources. Rural areas face technological, financial, and operational limitations, having poor water quality, generally. The purpose of this study was to evaluate the efficiency of a vertical tubular flocculator (VTF) to be used as part of the purification process in rural areas where small flows are used. An experimental treatment system (ETS) implemented in the field was used. The VTF was implemented using PVC pipes and fittings. Tests were carried out with the same raw water used from a conventional treatment plant with aluminum sulfate as a coagulant. The optimal coagulant dose applied in the ETS was determined by the jar test. In the VTF, the length, turbidity, and flow of the raw water were varied. The hydraulic behaviour of the VTF was evaluated with the analysis of the time distribution curve of concentration of a tracer applying the Wolf-Resnick model. A low residence time VTF was obtained, representing a new efficient flocculation model for the reduction of turbidity and colour. The results showed that the turbidity of the raw water, the residence time, and the degree of agitation are important parameters in the operation and efficiency of a VTF. There was a predominance of plug flow in the reactor. The obtained results were compared with the efficiency of a conventional water treatment plant used in the study site. The results obtained indicated that this ETS that integrates a VTF with settling and filtration can be a useful tool for rural areas. It was recommended to replicate this study with wastewater, other dimensions of the VTF, to establish a specific methodology for the design of the VTF, to evaluate the dosage with dose bombs for improving the results of VTF, and to elaborate a hydraulic model for VTF.
Collapse
Affiliation(s)
- Fernando García-Ávila
- Universidad de Cuenca, Professional School of Environmental Engineering, Cuenca, Ecuador; Environmental Risk Assessment Group in Production and Services Systems (RISKEN), Universidad de Cuenca, Cuenca, Ecuador.
| | | | - Francisco Novoa-Zamora
- Universidad de Cuenca, Professional School of Environmental Engineering, Cuenca, Ecuador
| | | | - Alex Avilés-Añazco
- Universidad de Cuenca, Professional School of Environmental Engineering, Cuenca, Ecuador; Environmental Risk Assessment Group in Production and Services Systems (RISKEN), Universidad de Cuenca, Cuenca, Ecuador
| | - Alexandra Guanuchi-Quito
- Universidad de Cuenca, Professional School of Environmental Engineering, Cuenca, Ecuador; Environmental Risk Assessment Group in Production and Services Systems (RISKEN), Universidad de Cuenca, Cuenca, Ecuador
| | - María Dolores Tonon-Ordoñez
- Universidad de Cuenca, Professional School of Environmental Engineering, Cuenca, Ecuador; Environmental Risk Assessment Group in Production and Services Systems (RISKEN), Universidad de Cuenca, Cuenca, Ecuador
| | - César Zhindón-Arévalo
- Universidad Católica de Cuenca, Sede Azogues, Unidad Académica de Salud y Bienestar, Azogues, Ecuador
| |
Collapse
|
3
|
Zhang H, Li L, Cheng S, Li C, Liu F, Wang P, Sun L, Huang J, Zhang W, Zhang X. Enhanced Microcystis Aeruginosa removal and novel flocculation mechanisms using a novel continuous co-coagulation flotation (CCF). THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159532. [PMID: 36257435 DOI: 10.1016/j.scitotenv.2022.159532] [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: 08/19/2022] [Revised: 10/13/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Co-coagulation flotation (CCF) is a novel flotation technology that renders more efficient algal removal compared to traditional mechanical coagulation flotation (MCF) due to a short residence time (< 30 s) and fast rising behavior of algal flocs (> 250 m·h-1). This study compared the algal removal performance using continuous CCF and MCF using water samples taken from Lake Dianchi with severe Microcystis aeruginosa blooms. Removal efficiency, dosage of coagulant/flocculant, rising velocity and structural characteristics of the resulting flocs in the two processes were systematically compared. The results show that CCF could save >50 % polyaluminum chloride (PAC) and polyacrylamide (PAM) compared with MCF when the removal efficiency was both over 95 %. The average rising velocity of flocs in CCF could reach 254.3 m·h-1, much higher than that in MCF (154.5 m·h-1). In the respective optimal coagulation conditions, the flocs formed in CCF (G = 164.8 s-1) were larger (1843 ± 128 μm) and more spherical with a higher fractal dimension (Df = 1.85 ± 0.01) than those generated in MCF (G = 34.1 s-1). The Stokes's Law was found to correctly predict the rising velocity of spherical flocs with large fractal dimensions (Df > 1.7). In contrast, the Haarhoff and Edzwald's extended equation was more suitable for calculating the rising velocity of irregular flocs with small fractal dimension. This study provides new insights into the mechanisms of the enhanced algal removal by CCF and lays foundation for developing cost-efficient algal mitigation processes.
Collapse
Affiliation(s)
- Haiyang Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Lili Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shaozhe Cheng
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cheng Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Fangzhou Liu
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07102, United States
| | - Peizhong Wang
- Wuxi Gongyuan Environmental Technology Stock CO., Ltd, Wuxi, Jiangsu 214194, China
| | - Lianjun Sun
- Wuxi Gongyuan Environmental Technology Stock CO., Ltd, Wuxi, Jiangsu 214194, China
| | - Junbo Huang
- Wuxi Gongyuan Environmental Technology Stock CO., Ltd, Wuxi, Jiangsu 214194, China
| | - Wen Zhang
- Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, NJ 07102, United States.
| | - Xuezhi Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.
| |
Collapse
|
4
|
Tran NN, Escribà-Gelonch M, Sarafraz MM, Pho QH, Sagadevan S, Hessel V. Process Technology and Sustainability Assessment of Wastewater Treatment. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Nam Nghiep Tran
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, South Australia5005, Australia
- Department of Chemical Engineering, Can Tho University, 3/2 Street, Can Tho900000, Vietnam
| | - Marc Escribà-Gelonch
- Higher Polytechnic Engineering School, University of Lleida, Igualada25003, Spain
| | | | - Quoc Hue Pho
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, South Australia5005, Australia
| | - Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Kuala Lumpur50603, Malaysia
| | - Volker Hessel
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, South Australia5005, Australia
- School of Engineering, University of Warwick, Coventry, LondonCV4 7AL, United Kingdom
| |
Collapse
|
5
|
Maraschin M, Hedlund Ferrari KF, Carissimi E. Acidification and flocculation of sludge from a water treatment plant: New action mechanisms. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117417] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Maraschin M, Ferrari KFSH, da Silva APH, Carissimi E. Aluminum sludge thickening: Novel helical pipes for aggregation by dual flocculation and thickening by filtration applied to water treatment plants. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116560] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
7
|
Zhang H, Liu C, Ou Y, Chen T, Yang L, Hu Z. Development of a helical coagulation reactor for harvesting microalgae. J Biosci Bioeng 2019; 127:447-450. [DOI: 10.1016/j.jbiosc.2018.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/28/2018] [Accepted: 09/19/2018] [Indexed: 10/28/2022]
|
8
|
Chang L, Cao Y, Fan G, Li C, Peng W. A review of the applications of ion floatation: wastewater treatment, mineral beneficiation and hydrometallurgy. RSC Adv 2019; 9:20226-20239. [PMID: 35514728 PMCID: PMC9065568 DOI: 10.1039/c9ra02905b] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 05/30/2019] [Indexed: 11/21/2022] Open
Abstract
The applications, progress and outlook of ion flotation are discussed.
Collapse
Affiliation(s)
- Luping Chang
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou
- PR China
| | - Yijun Cao
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou
- PR China
- Henan Province Industrial Technology Research Institute of Resources and Materials
| | - Guixia Fan
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou
- PR China
| | - Chao Li
- Henan Province Industrial Technology Research Institute of Resources and Materials
- Zhengzhou University
- Zhengzhou
- PR China
| | - Weijun Peng
- School of Chemical Engineering and Energy
- Zhengzhou University
- Zhengzhou
- PR China
| |
Collapse
|
9
|
Study of shear rate production in different geometric configurations of hydraulic reactors for ultra-flocculation. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2018.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
10
|
Benn F, Fawell P, Halewood J, Austin P, Costine A, Jones W, Francis N, Druett D, Lester D. Sedimentation and consolidation of different density aggregates formed by polymer-bridging flocculation. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
11
|
Oliveira HA, Azevedo AC, Etchepare R, Rubio J. Separation of emulsified crude oil in saline water by flotation with micro- and nanobubbles generated by a multiphase pump. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:2710-2718. [PMID: 29168711 DOI: 10.2166/wst.2017.441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The flocculation-column flotation with hydraulic loading (HL, >10 m h-1) was studied for the treatment of oil-in-water emulsions containing 70-400 mg L-1 (turbidity = 70-226 NTU) of oil and salinity (30 and 100 g L-1). A polyacrylamide (Dismulgan, 20 mg L-1) flocculated the oil droplets, using two floc generator reactors, with rapid and slow mixing stages (head loss = 0.9 to 3.5 bar). Flotation was conducted in two cells (1.5 and 2.5 m) with microbubbles (MBs, 5-80 μm) and nanobubbles (NBs, 50-300 nm diameter, concentration of 108 NBs mL-1). Bubbles were formed using a centrifugal multiphase pump, with optimized parameters and a needle valve. The results showed higher efficiency with the taller column reducing the residual oil content to 4 mg L-1 and turbidity to 7 NTU. At high HL (27.5 m h-1), the residual oil concentrations were below the standard emission (29 mg L-1), reaching 18 mg L-1. The best results were obtained with high concentration of NBs (apart from the bigger bubbles). Mechanisms involved appear to be attachment and entrapment of the NBs onto and inside the flocs. Thus, the aggregates were readily captured, by bigger bubbles (mostly MBs) aiding shear withstanding. Advantages are the small footprint of the cells, low residence time and high processing rate.
Collapse
Affiliation(s)
- H A Oliveira
- Laboratório de Tecnologia Mineral e Ambiental (LTM), Departamento de Engenharia de Minas, PPGE3M, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre CEP: 91501-970, RS, Brazil E-mail:
| | - A C Azevedo
- Laboratório de Tecnologia Mineral e Ambiental (LTM), Departamento de Engenharia de Minas, PPGE3M, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre CEP: 91501-970, RS, Brazil E-mail:
| | - R Etchepare
- Laboratório de Tecnologia Mineral e Ambiental (LTM), Departamento de Engenharia de Minas, PPGE3M, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre CEP: 91501-970, RS, Brazil E-mail: ; Present address: Departamento de Hidráulica e Saneamento, Universidade Federal do Paraná, Curitiba, PR 81531-980, Brazil
| | - J Rubio
- Laboratório de Tecnologia Mineral e Ambiental (LTM), Departamento de Engenharia de Minas, PPGE3M, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre CEP: 91501-970, RS, Brazil E-mail:
| |
Collapse
|
12
|
Luo L, Nguyen AV. A review of principles and applications of magnetic flocculation to separate ultrafine magnetic particles. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2016.07.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
13
|
Amaral Filho J, Azevedo A, Etchepare R, Rubio J. Removal of sulfate ions by dissolved air flotation (DAF) following precipitation and flocculation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.minpro.2016.01.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Flotation and Sorptive-Flotation Methods for Removal of Lead Ions from Wastewater Using SDS as Surfactant and Barley Husk as Biosorbent. J CHEM-NY 2013. [DOI: 10.1155/2013/413948] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
15
|
|
16
|
Otadi N, Hassani AH, Javid AH, Khiabani FF. Oily compounds removal in wastewater treatment system of pars oil refinery to improve its efficiency in a lab scale pilot. J WATER CHEM TECHNO+ 2011. [DOI: 10.3103/s1063455x1006010x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
17
|
Nakamura T, Okawa H, Kawamura Y, Sugawara K. Solid-liquid separation by sonochemistry: a new approach for the separation of mineral suspensions. ULTRASONICS SONOCHEMISTRY 2011; 18:85-91. [PMID: 20643570 DOI: 10.1016/j.ultsonch.2010.02.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 02/11/2010] [Accepted: 02/22/2010] [Indexed: 05/29/2023]
Abstract
The effect of sonochemistry to acidify solutions was applied for the solid-liquid separation of three kinds of mineral suspensions. At first, the relationship was measured between zeta-potential and pH in these suspensions to find pH levels correspondent to the isoelectric points. Then sonication (200 kHz or 28 kHz) was applied to adjust pH to the isoelectric points and separated particles from solutions by still-standing and spontaneous precipitation. Compared to the conventional methods using filters and chemical agents, the advantage of this sonochemical separation is two-fold. First, it does not require the maintenance of filters. Second, separated particles are easy to use since they are not mixed with pH adjusters and chemical flocculants. Isoelectric zone (ion strength 0.01, concentration 0.001 wt.%) of green tuff, andesite and titanium dioxide suspensions tested in this study were pH 1.1-3.7, 0.8-3.4, 2.7-5.7, respectively. The sonication of green tuff and andesite suspensions at 200 kHz changed the pH to the isoelectric zone despite the pH buffering effect of eluted alkali earth metals, and successfully precipitated the particles. On the contrary, the sonication of these suspensions at 28 kHz failed to adjust pH to the isoelectric zone, and the particles did not precipitate. In addition, the degradation of particles was observed in the SEM photographs of particles sonicated at 28 kHz, whereas no significant change was detected in particles sonicated at 200 kHz. Thus, it is concluded that the optimal frequency is about 200 kHz because its strong chemical effect can easily adjust the pH while its relatively weak physical effect prevents the degradation of particles.
Collapse
Affiliation(s)
- Takashi Nakamura
- Graduate School of Engineering and Resource Science, Akita University, Akita 010-8502, Japan.
| | | | | | | |
Collapse
|
18
|
A new technique for characterizing aerated flocs in a flocculation–microbubble flotation system. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.minpro.2010.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Owen A, Fawell P, Swift J, Labbett D, Benn F, Farrow J. Using turbulent pipe flow to study the factors affecting polymer-bridging flocculation of mineral systems. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.minpro.2008.02.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Carissimi E, Miller J, Rubio J. Characterization of the high kinetic energy dissipation of the Flocs Generator Reactor (FGR). ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.minpro.2007.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
21
|
DAF–dissolved air flotation: Potential applications in the mining and mineral processing industry. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.minpro.2006.07.019] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
22
|
|