Liquid purification or separation – Processes – Chemical treatment
Patent
1994-07-26
1996-07-30
Upton, Christopher
Liquid purification or separation
Processes
Chemical treatment
210761, 210766, C02F 1108
Patent
active
055408478
ABSTRACT:
Processes are disclosed for treating materials such as waste material, wastewater, and sludge, particularly waste activated sludge (WAS). In one aspect a process according to the present invention includes denaturing, acidifying and degassing incoming WAS while venting gases produced, preferably to a vent treatment system; feeding the resulting denatured WAS to a reactor into which are fed steam and oxygen, the steam discontinued once the reaction becomes autothermal; venting hot gases from the reactor back to the degassing step, to heat recovery or to a reactor, e.g. a sequencing batch reactor; and cooling and neutralizing the reactor product. Batch, semi-continuous, and batch sequencing methods are disclosed.
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Bice Danford L.
Stultz Jeffrey H.
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