Pyrolysis process for treating sewage sludge containing chromium

Details Pyrolysis process for treating sewage sludge containing chromium Pyrolysis process for treating sewage sludge containing chromium

1976-07-06

1977-07-19

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 71, C02C 300

Patent

active

040367533

ABSTRACT:
A pyrolysis process for treating sewage sludge containing chromium by burning combustible gas produced by thermal decomposition of the sewage sludge in a pyrolysis furnace by supplying oxygen of less than the theoretical amount necessary for burning the sewage sludge and keeping a partial pressure of oxygen in the furnace substantially at zero reduces the amount of hexavalent chromium remaining in the pyrolyzed residue to a harmless degree, and does not pollute the environment, has a large treating capacity, and is small in the necessary amount of fuel.

REFERENCES:
patent: 3507788 (1970-04-01), Cole et al.
patent: 3549010 (1970-12-01), Marsh et al.
patent: 3652405 (1972-03-01), Hess et al.
patent: 3714038 (1973-01-01), Marsh
patent: 3887401 (1975-06-01), Nickerson et al.

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