Drying and gas or vapor contact with solids – Process – With nondrying treating of material
Patent
1997-10-28
1999-03-16
Bennett, Henry
Drying and gas or vapor contact with solids
Process
With nondrying treating of material
34390, 34478, 41114, F26B 700
Patent
active
058814752
DESCRIPTION:
BRIEF SUMMARY
This application is the national phase of international application PCT/JP97/00621, filed Feb. 28, 1997 which designated the U.S.
1. Technical Field
The present invention relates to a method for treatment of human waste, and specifically to a non-draining type human waste disposal method without discharging drainage outwardly.
2. Background Art
For treatments of human waste, anaerobe digestion methods and aerobic digestion methods are employed widely, however, drainages therefrom must be subjected further to a standard denitrification, high-load denitrification, membrane treatment and the like in order make them allowable to be drained. Among these treatments, membrane treatments are prime these days. In these conventional treating methods of human waste, there are such problems as a large amount drainage (about 97% of human waste or sludge of digester chamber is water); a wide installation area; difficulty in securing the installation site; a large initial cost; a large maintenance cost of membrane treatments (for exchanging membrane); necessities for sludge treating facilities; difficulties in reconstructing old human waste treatment facilities and requiring high costs; and difficulties in responding to varied human waste-sludge ratios.
The present invention aims at providing a non-draining type human waste disposal method which enables a reduced installation area and no outside discharge of the drainage.
DISCLOSURE OF THE INVENTION
A non-draining type human waste disposal method according to the present invention comprises steps of discharging downward a pulsating combustion gas into a vertically cylindrical dryer from a pulse combustor disposed at the top of the dryer, making contact the pulsating combustion gas with residue-removed human waste, digester chamber sludges or their mixtures charged therein, turning the charged matters to dried powder and steam under the dryer conditions of 120.degree.-150.degree. C., withdrawing the dried powder from the bottom of the dryer, withdrawing the combustion gas containing steam from a lower side of the dryer, removing dust from the combustion gas containing steam and maintained at 120.degree.-150.degree. C., deodorizing the dust-removed combustion gas, and exhausting the deodorized gas into the air. All the water contained in the human waste or digester chamber sludges is discharged as steam. As an alternative, the method may include the steps of withdrawing the dried powder and the combustion gas containing steam from bottom of the dryer, charging the withdrawn material maintained at 120.degree.-150.degree. C. to an incinerator, incinerating odorous components and the dried powder entrained in the combustion gas containing steam under supply of a fuel and combustion air, removing dust from the incineration waste gas, and exhausting the dust-removed gas into the air. In this case, the dried powder is incinerated to leave the ash only, which reduces the volume of solid exhausts so remarkably.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows an embodiment of the invention,
FIG. 2 shows another embodiment of the invention, and
FIG. 3 is a cross-sectional view of an embodiment of a pulse combustor employable in the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
Human waste is subjected to pre-treatments as follows. Human waste carried by tank lorries is collected in receiving tanks, human waste residues are separated by passing the human waste through a primary human waste screen (coarse) and a secondary human waste screen (fine), and the screen-passed human waste is stored in a storage tank. The stored human waste is crushed with a human waste residue crushing pump, the crushed human waste is passed through a 5 mm-mesh tertiary human waste screen to remove further residues, and the residue-removed human waste is stored in a service tank. An embodiment of the present invention will be illustrated hereunder by use of FIG. 1. Human waste stored in a service tank (not shown) is charged through a human waste supply pump (not shown) to the human waste
REFERENCES:
patent: 3855645 (1974-12-01), West, Jr.
patent: 3885254 (1975-05-01), West, Jr.
patent: 3911506 (1975-10-01), West, Jr.
patent: 5257466 (1993-11-01), Kishi
patent: 5357880 (1994-10-01), Kishi
patent: 5370065 (1994-12-01), Christensen
patent: 5698095 (1997-12-01), Kami
Asatsu Tateo
Enkawa Takashi
Kikuchi Toshiaki
Kishima Shunji
Kishimoto Ken
Bennett Henry
Gravini Steve
Kishimoto Ken
Osaka Fuji Kogyo Kabushiki Kaisya
LandOfFree
Non-draining type human waste disposal method by pulse combustio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-draining type human waste disposal method by pulse combustio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-draining type human waste disposal method by pulse combustio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-807639