Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm
In order to make a comprehensive evaluation of the performance of fine bubble diffused aeration systems in cylindrical aeration tanks, the following parameters are considered: distribution of DO concentration in the horizontal direction of the different water depth of an aeration tank, distribution...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-07-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/84/2/404 |
| _version_ | 1818682060381880320 |
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| author | Er Li Xiangying Zeng |
| author_facet | Er Li Xiangying Zeng |
| author_sort | Er Li |
| collection | DOAJ |
| description | In order to make a comprehensive evaluation of the performance of fine bubble diffused aeration systems in cylindrical aeration tanks, the following parameters are considered: distribution of DO concentration in the horizontal direction of the different water depth of an aeration tank, distribution of DO concentration in the vertical direction of the aeration tank, distribution of DO concentration in all the points of the aeration tank and ratio of total mass increment of DO in the aeration tank to total mass of oxygen in aeration air. The aeration characteristic criterion (ACC) is proposed to synthesize these parameters, and weighted sums of the similarity degrees derived from the extensions of fuzzy c-means (FCM) are used to construct ACC. The results show that compared with total volumetric oxygen transfer coefficient () and specific standard oxygen transfer efficiency (), ACC is demonstrated to be more marked and sensitive for the performance evaluation of the fine bubble diffused aeration systems equipped with fine-pore aeration tubes. Moreover the performance of aeration systems equipped with different layouts of fine-pore aeration tubes is comparatively studied, and their performance from best to worst is ring-type diffuser > square-type diffuser > parallel-lines-type diffuser > cross-type diffuser. Highlights
The performances of fine bubble diffused aeration systems in cylindrical aeration tanks are evaluated based on the FCM algorithm.;
Comparison of the performance evaluation of aeration systems equipped with different layouts of fine-pore aeration tubes is made based on ACC.;
The performance of aeration systems equipped with different layouts of fine-pore aeration tubes is comparatively studied based on ACC.; |
| first_indexed | 2024-12-17T10:12:50Z |
| format | Article |
| id | doaj.art-9134d01e9ce7463fa8625ffdc432eea5 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-17T10:12:50Z |
| publishDate | 2021-07-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-9134d01e9ce7463fa8625ffdc432eea52022-12-21T21:52:59ZengIWA PublishingWater Science and Technology0273-12231996-97322021-07-0184240441910.2166/wst.2021.232232Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithmEr Li0Xiangying Zeng1 Wuhan Municipal Engineering Design and Research Institute, Changqing Road 40, Jianghan District, Wuhan 430015, China Wuhan Municipal Engineering Design and Research Institute, Changqing Road 40, Jianghan District, Wuhan 430015, China In order to make a comprehensive evaluation of the performance of fine bubble diffused aeration systems in cylindrical aeration tanks, the following parameters are considered: distribution of DO concentration in the horizontal direction of the different water depth of an aeration tank, distribution of DO concentration in the vertical direction of the aeration tank, distribution of DO concentration in all the points of the aeration tank and ratio of total mass increment of DO in the aeration tank to total mass of oxygen in aeration air. The aeration characteristic criterion (ACC) is proposed to synthesize these parameters, and weighted sums of the similarity degrees derived from the extensions of fuzzy c-means (FCM) are used to construct ACC. The results show that compared with total volumetric oxygen transfer coefficient () and specific standard oxygen transfer efficiency (), ACC is demonstrated to be more marked and sensitive for the performance evaluation of the fine bubble diffused aeration systems equipped with fine-pore aeration tubes. Moreover the performance of aeration systems equipped with different layouts of fine-pore aeration tubes is comparatively studied, and their performance from best to worst is ring-type diffuser > square-type diffuser > parallel-lines-type diffuser > cross-type diffuser. Highlights The performances of fine bubble diffused aeration systems in cylindrical aeration tanks are evaluated based on the FCM algorithm.; Comparison of the performance evaluation of aeration systems equipped with different layouts of fine-pore aeration tubes is made based on ACC.; The performance of aeration systems equipped with different layouts of fine-pore aeration tubes is comparatively studied based on ACC.;http://wst.iwaponline.com/content/84/2/404do concentration uniformityfuzzy c-means (fcm) algorithmoverall efficiency of oxygen mass transferperformance evaluation |
| spellingShingle | Er Li Xiangying Zeng Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm Water Science and Technology do concentration uniformity fuzzy c-means (fcm) algorithm overall efficiency of oxygen mass transfer performance evaluation |
| title | Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm |
| title_full | Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm |
| title_fullStr | Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm |
| title_full_unstemmed | Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm |
| title_short | Evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c-means algorithm |
| title_sort | evaluating the performance of fine bubble diffused aeration systems in cylindrical aeration tanks by fuzzy c means algorithm |
| topic | do concentration uniformity fuzzy c-means (fcm) algorithm overall efficiency of oxygen mass transfer performance evaluation |
| url | http://wst.iwaponline.com/content/84/2/404 |
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