Liquid purification or separation – Processes – Chemical treatment
Patent
1992-07-30
1995-06-06
Wyse, Thomas
Liquid purification or separation
Processes
Chemical treatment
210764, 210766, 71 12, 71901, 106708, 588257, C02F 1114
Patent
active
054220157
ABSTRACT:
Solid waste such as sewage sludge containing fecal matter is processed to reduce pathogens by at least 90% and converted to a useful product such as an amendment to agricultural land by combining the waste with an acid such as concentrated sulfuric and a base such as fly ash which exothermically react and thermally pasteurize the waste and add mineral value to the product. Pozzolanic materials, such as fly ash agglomerate the product and after grinding, the particles can aerate soil. The calcium oxide in fly ash reacts with sulfuric acid to form calcium sulfate dihydrate, a soil amendment. The amount of sulfuric acid can be controlled to provide a product with acid pH which is useful to neutralize alkaline soils such as those found in the Western United States of America.
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40 CFR, Part 257, 258.
Angell Edwin C.
Karr Jess
Hondo Chemical, Inc.
Jacobs Marvin E.
Wyse Thomas
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