Effect of moisture on sewage sludge combustion temperature profile and heavy metal leaching
| Autor: | Qiu Kunzan, Qunxing Huang, Jianhua Yan, Yong Chi, Shoukang Wang, Zhou Guoshun, Ben Yu |
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| Rok vydání: | 2016 |
| Předmět: |
Moisture
020209 energy General Chemical Engineering Environmental engineering 02 engineering and technology 010501 environmental sciences Sludge incineration Pulp and paper industry Combustion 01 natural sciences Volume (thermodynamics) 0202 electrical engineering electronic engineering information engineering Sewage sludge treatment Environmental science Physical and Theoretical Chemistry Water content Sludge 0105 earth and related environmental sciences Shrinkage |
| Zdroj: | Drying Technology. 34:1810-1819 |
| ISSN: | 1532-2300 0737-3937 |
| DOI: | 10.1080/07373937.2016.1142451 |
| Popis: | Moisture is the most important parameter affecting sewage sludge treatment efficiency and cost. In this article, the effect of moisture on sewage sludge combustion temperature profile and heavy metal leaching behavior has been experimentally studied. The temperature profiles inside the sludge pellet were recorded, and the volume shrinkage was obtained by image processing method. Results revealed that combustion rate and burnout of sludge strongly depends on moisture content and there exists an optimal moisture content for sludge incineration with respect to best combustion performance and minimum heavy metal leaching. The enlarged pore size may account for this moisture rate, that is, 48% for the sludge studied. During combustion, the shrinkage rate varied from 15 to 25%, and it was found to be proportional with moisture content. The cross-section image of burning sludge pellet illustrated that during the drying and combustion stage, the moisture evaporation was running parallel with the decomposi... |
| Databáze: | OpenAIRE |
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