Fuel and related compositions – Liquid fuels – Plant or animal extract mixtures or extracts of...
Reexamination Certificate
2011-03-22
2011-03-22
Hill, Jr., Robert J (Department: 1797)
Fuel and related compositions
Liquid fuels
Plant or animal extract mixtures or extracts of...
C044S605000, C210S605000, C210S630000, C210S761000
Reexamination Certificate
active
07909895
ABSTRACT:
In the processes for treating municipal sewage and storm water containing biosolids to discharge standards, biosolids, even after dewatering, contain typically about 80% water bound in the dead cells of the biosolids, which gives biosolids a negative heating value. It can be incinerated only at the expense of purchased fuel.Biosolids are heated to a temperature at which their cell structure is destroyed and, preferably, at which carbon dioxide is split off to lower the oxygen content of the biosolids. The resulting char is not hydrophilic, and it can be efficiently dewatered and/or dried and is a viable renewable fuel. This renewable fuel can be supplemented by also charging conventional biomass (yard and crop waste, etc.) in the same or in parallel facilities. Similarly, non-renewable hydrophilic fuels can be so processed in conjunction with the processing of biosolids to further augment the energy supply.
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McCabe, W.L. (1993). Unit Operations of Chemical Engineering, 5thed. McGraw-Hill, pp. 189-1
Bolin Kevin M.
Dickinson Norman L.
Dooley Brian
Overstreet Edward
Baker & Daniels LLP
EnerTech Environmental, Inc.
Hill, Jr. Robert J
McCaig Brian
LandOfFree
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