Patent ID: 6214064
Filing Date: 2001-04-10
Classification: C02F

Abstract:
A process for making a fuel product comprising:blending a sewage sludge with a sulfamic acid, said sewage sludge having a solids content of greater than 7% by weight;mixing an oxide-containing chemical with the blended sludge so as to cause a reaction which elevates a temperature of the sludge, said oxide-containing chemical selected from the group consisting of calcium oxide and calcium hydroxide;pressurizing the mixed sludge to a pressure of greater than 14.7 p.s.i.a. for a period of time of no less than 15 seconds;passing the pressurized mixed sludge through a flash chamber;mixing the pressurized mixed sludge with coal fines subsequent to the step of passing the pressurized mixed sludge through the flash chamber; andsolidifying the mixture of pressurized mixed sludge and coal fines such that the solified mixture has between 40% and 95% inclusive by weight of coal fines.