Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1976-06-01
1978-03-14
Wyse, Thomas G.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 10, 210 56, 210 64, 210 71, C02C 300
Patent
active
040790037
ABSTRACT:
Sludges in the form of aqueous suspensions of organic and inorganic materials that range in viscosity from thick viscous pastes to flowable liquids are produced in the operation of numerous industries and also as waste by municipalities. The apparatus and method of using the same that are the subject of the present invention are directed to transforming the sludge to solids both in sumps in which they may be situated as well as apart from such sumps or storage areas or from continuous sources. The apparatus of the present invention as aqueous sludge is sequentially removed from a sump, storage area, or from continuous sources mixes calcium oxide therewith at a predetermined rate within a confined space. The predetermined rate is such that the exothermic reaction between the calcium oxide and water in the sludge raises the temperature of the sludge-calcium oxide mixture to the extent that substantial steam is produced. The predetermined rate is also such that substantial hydrolysis and saponification of the sludge occurs, and the PH of the sludge-calcium oxide mixture being not less than 12.4. The elevated temperature that occurs in the confined space and the high pH results in the destruction of virus and bacteria in the sludge, and the almost instant destruction of objectionable odors from the sludge. The transformed sludge is in a solid particled state that can be compacted for construction and land fill purposes, and when neutralized may be used for agricultural purposes. Toxic compounds of metals such as cadmium, chromium, arsenic, zinc and the like that were initially present in the sludge are transformed into insoluble compounds by the high pH previously mentioned, and as a result these metals will not leach out when the transformed sludge is used for landfill, roadfill construction or agricultural purposes, and other end uses presently being developed.
REFERENCES:
patent: 2297195 (1942-09-01), Behringer
patent: 3342731 (1969-09-01), Baumann et al.
patent: 3476683 (1969-11-01), Liljegren
patent: 3796658 (1974-03-01), Meissner
patent: 4028240 (1977-06-01), Manchak
Babcock William C.
Wyse Thomas G.
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