Issues related to waste sewage sludge drying under superheated steam
Article
Article Title | Issues related to waste sewage sludge drying under superheated steam |
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Article Category | Article |
Authors | Hamawand, Ihsan (Author), da Silva, Wilton Pereira (Author), Eberhard, Friederike (Author) and Antille, Diogenes L. (Author) |
Journal Title | Polish Journal of Chemical Technology |
Journal Citation | 17 (4), pp. 5-14 |
Number of Pages | 10 |
Year | 2015 |
Place of Publication | Szczecin, Poland |
Digital Object Identifier (DOI) | https://doi.org/10.1515/pjct-2015-0062 |
Web Address (URL) | https://www.degruyter.com/view/j/pjct.2015.17.issue-4/pjct-2015-0062/pjct-2015-0062.xml |
Abstract | Sewage sludge was dried in a rotary drum dryer under superheated steam. Particle size and moisture content were shown to have significant influences on sticking and agglomeration of the materials. Pouring partially dried sludge (70–80% moisture content, wet basis) directly into the screw feeder of the drum dryer resulted in a significant sticking to the surface of the drum and the final particle size of the product was greater than 100 mm in diameter. The moisture content of this product was slightly less than its initial value. To overcome this issue, the sludge was mixed with lignite at variety ratios and then chopped before being introduced to the feeding screw. It was found that mixing the sludge with lignite and then sieving the chopped materials through a four millimetre mesh sieve was the key to solve this issue. This technique significantly reduced both stickiness and agglomeration of the material. Also, this enabled for a significant reduction in moisture content of the final product. |
Keywords | sewage sludge; agglomeration; sticking; liquid bridge; rotary drum dryer; superheated steam |
ANZSRC Field of Research 2020 | 400410. Wastewater treatment processes |
Public Notes | Open access journal. |
Byline Affiliations | National Centre for Engineering in Agriculture |
Federal University of Campina Grande, Brazil | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q39w1/issues-related-to-waste-sewage-sludge-drying-under-superheated-steam
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