"The Effects of Temperature and PH on Settlability of Activated Sludge Flocs"
The effluent quality of a sewage treatment plant using activated sludge process and finally secondary treatment depends on the flocculation efficiency and settling of the flocs. The survey of various treatment processes in water and wastewater treatment shows that temperature and pH are the importan...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Tehran University of Medical Sciences
2001-09-01
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| Series: | Iranian Journal of Public Health |
| Subjects: | |
| Online Access: | http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/341.pdf&manuscript_id=341 |
| _version_ | 1818645465683460096 |
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| author | Gh Ghanizadeh R Sarrafpour |
| author_facet | Gh Ghanizadeh R Sarrafpour |
| author_sort | Gh Ghanizadeh |
| collection | DOAJ |
| description | The effluent quality of a sewage treatment plant using activated sludge process and finally secondary treatment depends on the flocculation efficiency and settling of the flocs. The survey of various treatment processes in water and wastewater treatment shows that temperature and pH are the important factors affecting efficiency of flocculation and settling properties. This study was performed to determine the effects of pH and temperature on settling of the flocs in activated sludge process. It was carried out for three months in two phases, using mixed liquor suspended solids (MLSS), obtained from aeration tank from one of wastewater treatment plants in Tehran. In the primary phase, the temperature of samples was increased from 15°C to 35°C. As a result, the sludge volume index (SVI) and effluent suspended solids increased and consequently, COD removal percent decreased. In the second phase, the pH was increased from 5.7 to 9. As a result, SVI and effluent suspended solids decreased and COD removal percent increased. |
| first_indexed | 2024-12-17T00:31:11Z |
| format | Article |
| id | doaj.art-1e05e0c411874ab29791d921197cef18 |
| institution | Directory Open Access Journal |
| issn | 2251-6085 |
| language | English |
| last_indexed | 2024-12-17T00:31:11Z |
| publishDate | 2001-09-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Public Health |
| spelling | doaj.art-1e05e0c411874ab29791d921197cef182022-12-21T22:10:17ZengTehran University of Medical SciencesIranian Journal of Public Health2251-60852001-09-01303-4139142"The Effects of Temperature and PH on Settlability of Activated Sludge Flocs"Gh GhanizadehR SarrafpourThe effluent quality of a sewage treatment plant using activated sludge process and finally secondary treatment depends on the flocculation efficiency and settling of the flocs. The survey of various treatment processes in water and wastewater treatment shows that temperature and pH are the important factors affecting efficiency of flocculation and settling properties. This study was performed to determine the effects of pH and temperature on settling of the flocs in activated sludge process. It was carried out for three months in two phases, using mixed liquor suspended solids (MLSS), obtained from aeration tank from one of wastewater treatment plants in Tehran. In the primary phase, the temperature of samples was increased from 15°C to 35°C. As a result, the sludge volume index (SVI) and effluent suspended solids increased and consequently, COD removal percent decreased. In the second phase, the pH was increased from 5.7 to 9. As a result, SVI and effluent suspended solids decreased and COD removal percent increased.http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/341.pdf&manuscript_id=341Activated sludgeflocculationtemperaturepH |
| spellingShingle | Gh Ghanizadeh R Sarrafpour "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" Iranian Journal of Public Health Activated sludge flocculation temperature pH |
| title | "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" |
| title_full | "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" |
| title_fullStr | "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" |
| title_full_unstemmed | "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" |
| title_short | "The Effects of Temperature and PH on Settlability of Activated Sludge Flocs" |
| title_sort | the effects of temperature and ph on settlability of activated sludge flocs |
| topic | Activated sludge flocculation temperature pH |
| url | http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/341.pdf&manuscript_id=341 |
| work_keys_str_mv | AT ghghanizadeh theeffectsoftemperatureandphonsettlabilityofactivatedsludgeflocs AT rsarrafpour theeffectsoftemperatureandphonsettlabilityofactivatedsludgeflocs |