The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2000
Filed:
Jun. 05, 1998
Edward E Boss, Spring, TX (US);
Samuel L Shepherd, Kingwood, TX (US);
Other;
Abstract
A process for treating a waste sludge of biological solids including the steps of blending the sludge with an acid, mixing an oxide-chemical with the blended sludge so as to cause a reaction which elevates a temperature of the sludge, pressurizing the mixed sludge to a pressure of greater than 14.7 p.s.i.a. and retaining the mixed sludge at such pressure for a period of time of no less than 15 seconds, and discharging the pressurized mixed sludge. The step of pressurizing is accomplished by passing the mixed sludge as a flow into the pipe. The pipe has a length and diameter such that the flow of the mixed sludge takes longer than 15 seconds to pass through the pipe. The mixed sludge is heated as the flow passes through the pipe. An immersion heater or a magnetic field is installed so as to apply heat directly to the mixed sludge as the mixed sludge passes through the pipe.