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Document Type |
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Article In Journal |
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Document Title |
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Quality Monitoring of Composting Processes of Wastewater Sludge in Alexandria رقابة الجودة لعمليات تخمير حمأة المخلفات السائلة بالإسكندرية |
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Document Language |
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English |
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Abstract |
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Quality Monitoring of Composting Processes of Wastewater Sludge
in Alexandria
Olfat D. El-Sebaie* Ahmed H. Hussein* Magda M. Abd EL-Atty*
Mohamed H. Ramadan* Helaly A. Helaly**
* Environmental Heath Dept., High Institute of public Health, Alexandria University
** Alexandria General Organization of Sanitary Drainage (AGOSD)
Publisher: Journal of the Egyptian Public Health Association, 2002, Vol (77) No (5&6): 517-536
Abstract: There are two wastewater primary treatment plants in Alexandria (west and east). The produced primary sludge is mechanically dewatered and transported to sludge disposal site 9N where composting is carried out. However, prior to 1970, composting played a very minor role in sludge or solid wastes treatment because of greatly unfavorable balance between its economics and those of the principal competition option, namely landfill disposal. This study aims at monitoring and evaluating the composting process of demitted sludge produced from Alexandria wastewater treatment plants. Ten batches of sludge were composted. During the composting process the batches were been investigated and followed up to 3 months. Representative samples (10 for each batch) were taken from those batches at the start of windrowing and after each turning (4-15 days) and were analyzed for physical; chemical; bacteriological; and parasitological characteristics, heavy metals, and plant nutrients. Results revealed that C/N ratio of the final compost product comply with the decree of the Minister of Agriculture No. 100/1967, while moisture, C%, and TKN did not. Heavy metals, faecal coliforms, and helminthes complied with the decree No. 222/2002 for the Minister of Housing, Utilities, and Urban Communities. Moisture had positive correlation with both C and VS and negative correlation with pH. Temperature had negative correlation with TKN. Both total and faecal coliforms had negative correlation with temperature and positive correlation with C, N, and VS. It is recommended to optimize the quality of the produced sludge compost by use bulking agent rich in carbon and nitrogen as Hay or Rice straw, instead of the matured sludge compost. |
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ISSN |
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0379-7988 |
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Journal Name |
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The scientific journal of the Higher Institute of Public Health |
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Volume |
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77 |
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Issue Number |
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6 |
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Publishing Year |
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1423 AH
2002 AD |
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Article Type |
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Article |
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Added Date |
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Monday, August 22, 2011 |
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Researchers
| محمد حسن رمضان | Ramadan, Mohamed Hassan | Researcher | Doctorate | mhmram@hotmail.com |
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