AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE
This research work was focused on the rheological characteristics of conditioned fresh activated sludge using TA rheometer HR-2. The effect of cationic polyelectrolyte conditioner has been investigated for floc size, surface properties and yield stress at different pH values in a comparative fashion...
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| Format: | Article |
| Language: | English |
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Taylor's University
2017-01-01
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| Series: | Journal of Engineering Science and Technology |
| Subjects: | |
| Online Access: | http://jestec.taylors.edu.my/Vol%2012%20issue%201%20January%202017/12_1_11.pdf |
| _version_ | 1818392417293828096 |
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| author | SALAM K. AL-DAWERY SAJJALA S. REDDY |
| author_facet | SALAM K. AL-DAWERY SAJJALA S. REDDY |
| author_sort | SALAM K. AL-DAWERY |
| collection | DOAJ |
| description | This research work was focused on the rheological characteristics of conditioned fresh activated sludge using TA rheometer HR-2. The effect of cationic polyelectrolyte conditioner has been investigated for floc size, surface properties and yield stress at different pH values in a comparative fashion. Our approach was to reveal the effect of polymer on the municipal activated sludge
with high organic contents up to 80%. The results indicated an improvement of 50% in settling properties by addition polyelectrolyte up to 4 mg/g solid/l. Rheological data analysis showed that responses of shear stress - shear rate were found to be closest to Bingham model and gave almost similar and smaller
k values of average 6.2×10-3. The results of shear creep indicated that all sludge samples have less rigid structures with no reconstruction behavior. The optical analyses of the samples indicated that the floc sizes were increased with successive addition of polyelectrolyte. The increase of floc sizes caused large
stresses especially for solution with pH=9. As the flocculation accorded despite the negative zeta potential, this phenomenon can be referred to that interparticles hydrogen bridging was governing flocculation rather than charge neutralization. Also, during the experiment, bacterial growth showed an adaption despite the conditioning with polyelectrolyte. |
| first_indexed | 2024-12-14T05:29:05Z |
| format | Article |
| id | doaj.art-2315dd0f8de94f84857e4573baa65f13 |
| institution | Directory Open Access Journal |
| issn | 1823-4690 |
| language | English |
| last_indexed | 2024-12-14T05:29:05Z |
| publishDate | 2017-01-01 |
| publisher | Taylor's University |
| record_format | Article |
| series | Journal of Engineering Science and Technology |
| spelling | doaj.art-2315dd0f8de94f84857e4573baa65f132022-12-21T23:15:25ZengTaylor's UniversityJournal of Engineering Science and Technology1823-46902017-01-01121138154AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGESALAM K. AL-DAWERY0 SAJJALA S. REDDY1University of Nizwa, Birkat Al Mouz, P.O. Box: 33, PC 616, Nizwa, Sultanate of OmanUniversity of Nizwa, Birkat Al Mouz, P.O. Box: 33, PC 616, Nizwa, Sultanate of OmanThis research work was focused on the rheological characteristics of conditioned fresh activated sludge using TA rheometer HR-2. The effect of cationic polyelectrolyte conditioner has been investigated for floc size, surface properties and yield stress at different pH values in a comparative fashion. Our approach was to reveal the effect of polymer on the municipal activated sludge with high organic contents up to 80%. The results indicated an improvement of 50% in settling properties by addition polyelectrolyte up to 4 mg/g solid/l. Rheological data analysis showed that responses of shear stress - shear rate were found to be closest to Bingham model and gave almost similar and smaller k values of average 6.2×10-3. The results of shear creep indicated that all sludge samples have less rigid structures with no reconstruction behavior. The optical analyses of the samples indicated that the floc sizes were increased with successive addition of polyelectrolyte. The increase of floc sizes caused large stresses especially for solution with pH=9. As the flocculation accorded despite the negative zeta potential, this phenomenon can be referred to that interparticles hydrogen bridging was governing flocculation rather than charge neutralization. Also, during the experiment, bacterial growth showed an adaption despite the conditioning with polyelectrolyte.http://jestec.taylors.edu.my/Vol%2012%20issue%201%20January%202017/12_1_11.pdfMunicipal sludgeFloc sizeRheologyPolyelectrolyte. |
| spellingShingle | SALAM K. AL-DAWERY SAJJALA S. REDDY AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE Journal of Engineering Science and Technology Municipal sludge Floc size Rheology Polyelectrolyte. |
| title | AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE |
| title_full | AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE |
| title_fullStr | AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE |
| title_full_unstemmed | AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE |
| title_short | AN EXPERIMENTAL STUDY ON THE RHEOLOGICAL PROPERTIES OF CONDITIONED MUNICIPAL ACTIVATED SLUDGE |
| title_sort | experimental study on the rheological properties of conditioned municipal activated sludge |
| topic | Municipal sludge Floc size Rheology Polyelectrolyte. |
| url | http://jestec.taylors.edu.my/Vol%2012%20issue%201%20January%202017/12_1_11.pdf |
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