Liquid purification or separation – With heater or heat exchanger – With treating fluid addition
Patent
1997-05-05
1999-06-29
Hruskoci, Peter A.
Liquid purification or separation
With heater or heat exchanger
With treating fluid addition
48197A, 71 12, 210180, 210181, 2101952, 210199, 210202, 210218, 2102571, C02F 102
Patent
active
059164379
ABSTRACT:
The present invention provides treatment of domestic sewage containing oil. The resulting products will be purified water, dry fertilizer, and fuel (gas and liquid) containing no contaminants that could pollute the environment. After the initial settling process, two parallel flows are created: one containing liquid plus crude sediment (0.2 mm and greater) and the other containing liquid and fine particles (less than 0.2 mm), the latter termed "settled domestic sewage". The two flows are treated separately. The settled domestic sewage after treatment in a low-pressure separator that will separate out liquid fuel, followed by aeration, ultrafiltration, and finally sterilization by ozone or chlorine, results in pure water. The biochemical treatment of the sediments results in the production of gas fuel containing mainly methane gas and solid product that after drying and disinfecting is converted into fertilizer. The system is comprised of a fire chamber and a recuperator which will allow for the utilization of the liquid and gas fuel products to reduce energy expenditures in the cleaning process.
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patent: 5514282 (1996-05-01), Hibbard et al.
patent: 5679258 (1997-10-01), Petersen
patent: 5728305 (1998-03-01), Hawkinson
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