Fuel and related compositions – Consolidated solids – Vegetation or refuse
Patent
1988-02-29
1989-05-09
Dees, Carl F.
Fuel and related compositions
Consolidated solids
Vegetation or refuse
44605, C10L 540, C10L 500
Patent
active
048285773
ABSTRACT:
A process is described for treating a feed wastewater from a food preparation plant to recover substantially all of its fats and up to 50% of its proteins in a chemical float sludge which is selectively admixed with an absorptive bulking agent, such as sawdust, at a dry-basis weight ratio of 3-4 pounds of bulking agent to one pound of total sludge solids to produce a biomass mixture which is selectively dried and regulated in size to a maximum of 1/8-inch to produce a biomass fuel, characterized by a fuel value of approximately 11,000 Btu per pound, which is highly suitable for self-sustained burning in a gasifier-type suspension burner. After removal of the float sludge, the partially purified wastewater is aerobically treated with microorganisms to produce activated sludge, a selected portion thereof being recycled to the feed wastewater before admixing coagulation and flocculation chemicals therewith. Another selected portion of the activated sludge may also be admixed with the float sludge and the bulking agent. Waste activated sludge may be up to 50% of the total sludge solids on dry weight basis.
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"Flotation IPL Systems", brochure of Nijhus Water, P. O. Box 43, 7100 AA Winterswijk-Holland.
Markham, Jr. William M.
Reid John H.
Dees Carl F.
Lelong Marion P.
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