4.7 Article

Integrated drying and incineration of wet sewage sludge in combined bubbling and circulating fluidized bed units

Journal

WASTE MANAGEMENT
Volume 34, Issue 12, Pages 2561-2566

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2014.08.018

Keywords

Sewage sludge; Integrated incineration; Circulating fluidized bed; Drying; Demonstration

Funding

  1. Major Science and Technology Program for Water Pollution Control and Treatment [2009ZX07317-003]

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An original integrated drying and incineration technique is proposed to dispose of sewage sludge with moisture content of about 80% in a circulating fluidized bed. This system combines a bubbling fluidized bed dryer with a circulating fluidized bed incinerator. After drying, sewage sludge with moisture less than 20% is transported directly and continuously from the fluidized bed dryer into a circulating fluidized bed incinerator. Pilot plant results showed that integrated drying and incineration is feasible in a unique single system. A 100 t/d Sewage Sludge Incineration Demonstration Project was constructed at the Qige sewage treatment plant in Hangzhou City in China. The operational performance showed that the main operation results conformed to the design values, from which it can be concluded that the scale-up of this technique is deemed both feasible and successful. (C) 2014 Elsevier Ltd. All rights reserved.

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