Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes
Microbubble technology dramatically raises the efficiency of the flotation and aeration processes of water treatment plants (WTPs), which see extensive use in developed countries. A local institution, Indonesia Water Institute, has tried to investigate microbubble technology intended for lab-scale W...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-04-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844020305934 |
| _version_ | 1811223920956669952 |
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| author | Nyoman Suwartha Destrianti Syamzida Cindy Rianti Priadi Setyo Sarwanto Moersidik Firdaus Ali |
| author_facet | Nyoman Suwartha Destrianti Syamzida Cindy Rianti Priadi Setyo Sarwanto Moersidik Firdaus Ali |
| author_sort | Nyoman Suwartha |
| collection | DOAJ |
| description | Microbubble technology dramatically raises the efficiency of the flotation and aeration processes of water treatment plants (WTPs), which see extensive use in developed countries. A local institution, Indonesia Water Institute, has tried to investigate microbubble technology intended for lab-scale WTP. However, the current reactor system does not yet meet the microbubble criteria, especially as it has had few investigations of its abilities in flotation and aeration. This study aims to analyze the effect of size variations that affect the rising velocity and mass transfer coefficient (kLa) of aeration contact time. Three local spargers were used to produce microbubbles. Bubble diameters were measured optically and analyzed using ImageJ software. The dissolved oxygen (DO) concentration was measured every minute using an automated sensor so that the kLa could be determined. Of the three spargers, the smallest bubble size was produced by the vortex type with an average bubble diameter of 89 μm and the slowest rising velocity of 17.67 m/h. It also yielded the highest kLa of 0.297/min, which gave an aeration contact time of 3.64 minutes. The experimental uses of three local spargers revealed that the smaller the microbubble diameter, the higher the mass transfer coefficient in flotation and aeration processes. This research can be the basis for developing microbubble technology for WTP in Indonesia. |
| first_indexed | 2024-04-12T08:41:49Z |
| format | Article |
| id | doaj.art-877fa9e52f4d41208e3d28ad3ad4fb29 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-12T08:41:49Z |
| publishDate | 2020-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-877fa9e52f4d41208e3d28ad3ad4fb292022-12-22T03:39:52ZengElsevierHeliyon2405-84402020-04-0164e03748Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processesNyoman Suwartha0Destrianti Syamzida1Cindy Rianti Priadi2Setyo Sarwanto Moersidik3Firdaus Ali4Environmental Engineering Study Program, Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok, 16424, Indonesia; Corresponding author.Environmental Engineering Study Program, Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok, 16424, IndonesiaEnvironmental Engineering Study Program, Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok, 16424, IndonesiaEnvironmental Engineering Study Program, Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok, 16424, IndonesiaIndonesia Water Institute, Tanjung Barat, DKI Jakarta, 12530, IndonesiaMicrobubble technology dramatically raises the efficiency of the flotation and aeration processes of water treatment plants (WTPs), which see extensive use in developed countries. A local institution, Indonesia Water Institute, has tried to investigate microbubble technology intended for lab-scale WTP. However, the current reactor system does not yet meet the microbubble criteria, especially as it has had few investigations of its abilities in flotation and aeration. This study aims to analyze the effect of size variations that affect the rising velocity and mass transfer coefficient (kLa) of aeration contact time. Three local spargers were used to produce microbubbles. Bubble diameters were measured optically and analyzed using ImageJ software. The dissolved oxygen (DO) concentration was measured every minute using an automated sensor so that the kLa could be determined. Of the three spargers, the smallest bubble size was produced by the vortex type with an average bubble diameter of 89 μm and the slowest rising velocity of 17.67 m/h. It also yielded the highest kLa of 0.297/min, which gave an aeration contact time of 3.64 minutes. The experimental uses of three local spargers revealed that the smaller the microbubble diameter, the higher the mass transfer coefficient in flotation and aeration processes. This research can be the basis for developing microbubble technology for WTP in Indonesia.http://www.sciencedirect.com/science/article/pii/S2405844020305934Chemical engineeringEnvironmental scienceWater treatmentGreen engineeringEnvironmental chemical engineeringWater pollution |
| spellingShingle | Nyoman Suwartha Destrianti Syamzida Cindy Rianti Priadi Setyo Sarwanto Moersidik Firdaus Ali Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes Heliyon Chemical engineering Environmental science Water treatment Green engineering Environmental chemical engineering Water pollution |
| title | Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| title_full | Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| title_fullStr | Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| title_full_unstemmed | Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| title_short | Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| title_sort | effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes |
| topic | Chemical engineering Environmental science Water treatment Green engineering Environmental chemical engineering Water pollution |
| url | http://www.sciencedirect.com/science/article/pii/S2405844020305934 |
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