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|Document Type: ||Article|
|Title: ||Biodrying for mechanical-biological treatment of wastes: A review of process
science and engineering|
|Authors: ||Velis, C. A.|
Longhurst, Philip J.
Drew, Gillian H.
Pollard, Simon J. T.
|Issue Date: ||2009|
|Citation: ||C.A. Velis, P.J. Longhurst, G.H. Drew, R. Smith, S.J.T. Pollard, Biodrying for
mechanical-biological treatment of wastes: A review of process science and
engineering, Bioresource Technology, Volume 100, Issue 11, June 2009, Pages
|Abstract: ||Biodrying is a variation of aerobic decomposition, used within
mechanical–biological treatment (MBT) plants to dry and partially stabilise
residual municipal waste. Biodrying MBT plants can produce a high quality solid
recovered fuel (SRF), high in biomass content. Here, process objectives,
operating principles, reactor designs, parameters for process monitoring and
control, and their effect on biodried output quality are critically examined.
Within the biodrying reactors, waste is dried by air convection, the necessary
heat provided by exothermic decomposition of the readily decomposable waste
fraction. Biodrying is distinct from composting in attempting to dry and
preserve most of biomass content of the waste matrix, rather than fully
stabilise it. Commercial process cycles are completed within 7–15 days, with
mostly H2O(g) and CO2 loses of ca. 25–30% w/w, leading to moisture contents of
<20% w/w. High airflow rate and dehumidifying of re-circulated process air
provides for effective drying. We anticipate this review will be of value to MBT
process operators, regulators and end-users o|
|Appears in Collections:||Staff publications - School of Applied Sciences|
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