Evaporative waste disposal system

• US 4,546,502 A
• Filed: 10/09/1984
• Issued: 10/15/1985
• Est. Priority Date: 03/14/1983
• Status: Expired due to Fees

• Current Assignee: Hyok S. Lew
• Original Assignee: Hyok S. Lew
• Inventors: Lew, Hyok S.
• Primary Examiner(s): Artis, Henry K.
• Application Number:
  US06/659,163
• Time in Patent Office: 371 Days
• Field of Search: 4/111.1-111.6, 4/449, 4/321, 4/315, 4/318, 4/317, 4/DIG. 19, 4/420, 4/322, 4/323, 210/532.1, 210/532.2, 210/533, 210/513
• US Class Current: 4/449
• CPC Class Codes: A47K 11/02 Dry closets, e.g. incinerator closets
• CPC Class Codes: Y02A 50/30 Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Abstract

This invention relates to a process for disposing of human waste wherein the liquid waste is evaporated off and the solid waste is dehydrated for easy disposal. A preseparating toilet bowl roughly separates the urinous wastes and the toilet rinse water from the fecal wastes and other solid wastes dumped into the preseparating toilet bowl. The liquid waste separated from the solid waste flows into an evaporator wherein it is evaporated into the atmosphere by means of air currents circulated through the evaporator. The solid waste drops into a dryer or incinerator wherein it is dehydrated by the heat or vacuum drying process, or a combination thereof, or incinerated by an electric heater or gas burner. The dried solid waste may be bagged and used as a fertilizer or it may be taken to a centralized incinerating plant.

Claims

1. A preseparating toilet bowl for roughly separating the liquid waste and the toilet bowl rinsing water from the solid waste comprising in combination:

(a) a toilet bowl of a funnel-shaped tubular construction having a seat disposed at the diverging end of said toilet bowl;

(b) a converging-diverging tubular bottom having a smooth throat section connected to the converging end of said toilet bowl in a smooth and continuous relationship and thus providing a diverging bottom for said toilet bowl;

(c) a solid waste tube with an inlet diameter substantially greater than the diameter of said throat section of said converging-diverging tubular bottom and substantially less than the diameter of said diverging bottom of said toilet bowl, said solid waste tube disposed within said diverging bottom of said toilet bowl in a substantially coaxial relationship wherein an annular gap is provided intermediate said diverging bottom of said toilet bowl and said inlet of said solid waste tube; and

(d) a liquid waste pipe for draining the liquid waste and the toilet rinse water collected at a closed bottom of said annular gap intermediate said diverging bottom of said toilet bowl and said solid waste tube;

whereby, the liquid waste and the toilet bowl rinsing water landing on the inner wall of said funnel-shaped toilet bowl flows down following the wall of said converging-diverging tubular bottom of said toilet bowl due to surface tension and is discharged through said liquid waste tube, while the solid waste dropped into said toilet bowl is funneled through said throat of said converging-diverging tubular bottom of said toilet bowl and drops into said solid waste tube, said solid waste tube discharging the solid waste dropped thereinto.

2. The combination as set forth in claim 1 wherein said solid waste tube includes a blocking means that closes and opens the solid waste passage through said solid waste tube.

3. The combination as set forth in claim 1 wherein said toilet bowl includes means for spray cleaning said toilet bowl.

4. An evaporative waste disposal system comprising in combination:

(a) a preseparating toilet bowl including a converging-diverging tubular bottom having a smooth throat section that provides a diverging bottom for said toilet bowl; and

a solid waste tube with an inlet diameter substantially greater than the diameter of the throat section of said converging-diverging tubular bottom and substantially less than the diameter of said diverging bottom of said toilet bowl, said solid waste tube substantially coaxially disposed within said diverging bottom of said toilet bowl providing an annular gap connected to a liquid waste tube;

whereby the liquid waste and toilet bowl rinsing water landing on the inner wall of said toilet bowl flows down following the wall of said converging-diverging tubular bottom of said toilet bowl due to surface tension and is discharged through said liquid waste tube, and the solid waste funneled through said throat section of said converging-diverging toilet bottom drops straight into said solid waste tube and is discharged through said solid waste tube;

(b) a liquid waste evaporator including means for spreading the liquid waste and toilet bowl rinsing water discharged into said liquid waste evaporator through said liquid waste tube over a large surface area and further including means for circulating air through said liquid waste evaporator;

whereby said liquid waste and toilet bowl rinsing water discharged into said liquid waste evaporator evaporates into the atmosphere in an accelerated phase due to a large wetted area exposed to air circulation by said means; and

(c) a solid waste dryer connected to said solid waste tube including means for dehydrating the solid wastes discharged into said solid waste dryer through said solid waste tube and further including means for conveying the dried solid wastes out of said solid waste dryer.

5. The combination as set forth in claim 4 wherein said means for dehydrating the solid wastes includes means for heating the solid wastes in said solid waste dryer.

6. The combination as set forth in claim 4 wherein said means for dehydrating the solid wastes includes means for evacuating said solid waste dryer that vacuum-dries the solid wastes in said solid waste dryer.

7. The combination as set forth in claim 4 wherein said means for dehydrating the solid wastes includes a combination of heating means and evacuating means that dehydrates the solid wastes in said solid waste dryer by a combined process of heat-drying and vacuum-drying.

8. The combination as set forth in claim 4 wherein said means for conveying the dried solid wastes includes a pneumatic conveying means.

9. The combination as set forth in claim 4 wherein a dried solid waste storage bin stores the dried solid wastes discharged from said waste dryer.

10. The combination as set forth in claim 9 wherein said dried solid waste storage bin includes means for further drying and oxidizing the dried solid wastes by an aeration.

11. The combination as set forth in claim 10 wherein said dried solid waste storage bin is connected to an incinerator that incinerates the dried solid wastes.

12. The combination as set forth in claim 4 that includes a heating means preheating the air circulated through said liquid waste evaporator.

13. The combination as set forth in claim 12 wherein said heating means comprises a solar collector.

14. An evaporating-incinerating waste disposal system comprising in combination:

(a) a preseparating toilet bowl including a converging-diverging tubular bottom having a smooth throat section that provides a diverging bottom for said toilet bowl; and

a solid waste tube with an inlet diameter substantially greater than the diameter of the throat section of said converging-diverging tubular bottom and substantially less than the diameter of said diverging bottom of said toilet bowl, said solid waste tube substantially coaxially disposed within said diverging bottom of said toilet bowl providing an annular gap connected to a liquid waste tube;

whereby the liquid waste and toilet bowl rinsing water landing on the inner wall of said toilet bowl flows down following the wall of said converging-diverging tubular bottom of said toilet bowl due to surface tension and is discharged through said liquid waste tube, and the solid waste funneled through said throat section of said converging-diverging toilet bottom drops straight into said solid waste tube and is discharged through said solid waste tube;

(b) a liquid waste evaporator including means for spreading the liquid waste and toilet bowl rinsing water discharged into said liquid waste evaporator through said liquid waste tube over a large surface area and further including means for circulating air through said liquid waste evaporator;

whereby said liquid waste and toilet bowl rinsing water discharged into said liquid waste evaporator evaporates into the atmosphere in an accelerated phase due to a large wetted area exposed to air circulation by said means; and

(c) a solid waste incinerator connected to said solid waste tube including means for incinerating the solid wastes discharged into said solid waste incinerator through said solid waste tube and further including means for exhausting gases and ashes produced by said incineration of solid wastes.

15. The combination as set forth in claim 14 that includes a heating means preheating the air circulated through said liquid waste evaporator.

16. The combination as set forth in claim 15 wherein said heating means comprises a solar collector.