Patent ID: 6887389

Claim:
A method for recycling sewage sludge comprising the steps of: a. Blending sewage sludge with spent water softener lime in a feed hopper to produce a mixture; b. Introducing said mixture into a pre-dryer kiln wherein said pre-dryer kiln maintains a temperature sufficient to evaporate water from said mixture; c. Subjecting said mixture to a refractory-lined combuster rotary kiln, said rotary kiln being maintained at a temperature of at least 1500 degrees Fahrenheit resulting in an ash by-product and gases of combustion; d. Removing said ash by-product to a storage area; e. Introducing said gases of combustion to a thermal oxidizer maintained at a temperature of between 1500 degrees Fahrenheit to 1700 degrees Fahrenheit resulting in an ash by-product and heated gases; f. Removing said ash by-product from said thermal oxidizer to said storage area; g. Transferring said heated gases to said pre-dryer kiln; h. Delivering spent exhaust gases from said pre-dryer kiln to a cooling tower maintained at between 300-450 degrees Fahrenheit to quench said spent exhaust gases; i. Passing said cooled spent exhaust gases to a baghouse controller; j. Extracting ash from said baghouse controller and storing it with said ash by-products from said thermal oxidizer and said combuster kiln and exhausting the baghouse controller.