Baths – closets – sinks – and spittoons – Dry closets – With heating meas
Patent
1980-07-06
1982-08-10
Artis, Henry K.
Baths, closets, sinks, and spittoons
Dry closets
With heating meas
41112, 41115, 4449, 4DIG12, A47K 1106
Patent
active
043430511
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to decomposition containers. The invention primarily relates to decomposition latrines of the kind comprising a chamber with a heat source associated therewith, such as an electric heating element for heating excrement or other decomposable organic material in the chamber.
Most of the decomposition latrines known and used up to now have a decomposition chamber and an electric heating element arranged along the bottom of the chamber for heating up the mass in the chamber. Stirring means, rotatable about a horizontal axis, can furthermore be arranged in the chamber for providing mixture of the constituent parts of the mass to a more or less homogeneous and porous mass, which is acted on by the oxygen in the air flowing through the chamber. The mass is kept heated to a temperature of about 25.degree. C. for somewhat accelerating decomposition. Such a decomposition latrine is illustrated and described in the Swedish Patent 7402187-4.
The known decomposition latrine has a mode of operation such that, when the mass has partially decomposed and is to be removed from the chamber, a hatch must be opened in one side of the chamber, whereafter it is possible to use the stirring means to move decomposed material from the chamber and out through the opening uncovered by the hatch, so that the decomposed material falls down into a secondary chamber. The partially decomposed material often contains certain types of sickness-generating bacteria, fly eggs and other unhygienic constituents however, which are not desirable in the final product, since it is to be handled by people and possibly used as manure. For rendering these constituents innocuous, the wholly or partially decomposed material is subjected to heating in the secondary chamber, in the known decomposition latrine, to a temperature which is considerably higher than the decomposition temperature used in the first chamber and which is intended to provide pasteurization.
Pasteurization is obtained at a temperature of about 55.degree. C., although the temperature should preferably reach 67.degree. C., at least for a short time, so that pasteurization is done rapidly. In the known latrine, there is a further heat source in the form of an electric heating element situated at the bottom of the secondary chamber, there to provide a temperature of about 70.degree. C. However, the temperature decreases rapidly further up in the decomposed material lying stationary in the secondary chamber. Pasteurization of the final product in the known latrine will therefore not be satisfactorily carried out in the major portion of the mass.
Characteristic of the known decomposition toilet is thus that decomposition and pasteurization are done in two separate operations and in two separate chambers. Decomposition takes place at the temperature in the interval of 25.degree. to 30.degree. C., i.e. in the temperature range known as the mesophilic temperature range. The decomposition process in the thermophilic temperature range is many times quicker than that in the mesophilic.
The present invention has the object of providing a decomposition container or decomposition latrine, in which decomposition and pasteurization can be performed more simply and in a mode which is quicker and more effective than in the known decomposition latrine. This is achieved with a decomposition container which, according to the invention, is distinguished in that the heat source is provided to raise the temperature of the mass in the chamber to a value of between 45.degree. and 80.degree. C., enabling a rapid thermophilic decomposition process simultaneously as rapid pasteurization, the pasteurized portion of the mass being movable from the region at the heat source with the help of a stirring means, rotatable by means of an electric motor.
Since the stirring means in the container in accordance with the invention continuously or intermittently stirs the mass in the chamber, the temperature in the portion of the mass lying in the vicinity of the heat source will have a temperatur
REFERENCES:
patent: 3840907 (1974-10-01), Sundberg
patent: 3859672 (1975-01-01), Modig
patent: 4096592 (1978-06-01), Clark
patent: 4196477 (1980-04-01), Stewart
patent: 4240164 (1980-12-01), Lind
Artis Henry K.
Inventor Invest AB
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