Chemistry: molecular biology and microbiology – Process of utilizing an enzyme or micro-organism to destroy... – Destruction of hazardous or toxic waste
Patent
1998-01-12
1999-08-31
Beisner, William H.
Chemistry: molecular biology and microbiology
Process of utilizing an enzyme or micro-organism to destroy...
Destruction of hazardous or toxic waste
4352903, 4352904, 71 9, 210609, C05F 306, C05F 902, C12M 106
Patent
active
059453320
DESCRIPTION:
BRIEF SUMMARY
THE BACKGROUND OF THE INVENTION
The present invention relates to an apparatus which by integrating dewatering/sludge separation, the purification of liquid and a composting process of the solid separated fraction such as the sludge from waste water provides a system of purification and recycling, say applicable to the waste water of a one family house, block of flats or cluster of houses (terraced houses, ecological building, small villages etc.) where a common waste water pipe is laid to the above described apparatus for the treatment and purification of waste water before being infiltrated, resorbed or being led directly to a recipient.
The outflowing water from the apparatus is free from heavy metals, nutrients, virus, pathogenic organisms, BOD/TOD, bacteria etc., and therefore can be infiltrated without a slurry (sludge) separator, distribution pipes, distribution tank and subsoil filter.
The system can also be used for other purposes of purification where organic matter is dissolved in a liquid phase and where you as well recycle the biological substance from the obtained compost fraction.
SUMMARY OF THE INVENTION
The said described apparatus promotes recycling of nutrients in for example waste water (N,P,K etc) by obtaining a compost fraction from waste water sludge etc., and purifying the outflowing water effectively by a gradual filtration through specifically arranged and designed steps of filters for the purification process.
Dewatering occurs in the said apparatus by a step by step adjusted dewatering device according to the particle size of the solid fraction.
Thanks to the construction of the apparatus and the process there it can be installed in the subsoil, basement, built into a separate building or being dug down into the ground. The final step of filtration can be installed into the ground at a lower level than the apparatus itself.
With a local solution close to the source more conscious consumers and producers of waste will be the result of it all, and thereby more effective, cleaner, renewed and recycled waste fractions for the individual and for society.
As for the local society with an option to make use of human urine, especially concerning the collection, storing and transportation to the consumer a separation of the urine and preferably of the grey water (from bathing, shower, washing etc.,) can be carried through in order for the said apparatus to purify toilet waste water only.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a first embodiment of a system according to the invention.
FIGS. 2-4 show the details of the shaking plate structure used within the system.
FIG. 5 shows a second embodiment of a system according to the invention.
Technical effects of the apparatus on society, enviroment and individual are as follows:
1. The process is not disturbed by surface water and makes a local treatment of surface-water possible in for example sub surface filters, wells, ponds, wetlands etc.
2. The process is not affected by fluctuations of the temperature (seasons, day and night).
3. The process is not affected by changes of waste water flow during 24 hours thanks to the separation into process chambers where for example dewatering takes place in the first chamber (4) at low rates of flow and in the other chambers (5-6) at higher rates of flow. Some degree of liquid composting also takes place in the process chambers (4-6) during hours of a low rate of flow.
4. A good sanitation owing to the liquid composting process and to the dry composting process during a relatively extended retention time of the solids with high temperatures (50-60 degrees Celsius). These effects of sanitation are more difficult to obtain in liquid composting only, three-compartment septic tanks and open settling basins of purifying plants during seasonal changes.
5. Intermittent flows of waste water also provide fluctuating access of nutrients for the microorganisms. These circumstances affect a large number of bacteria populations so that they during a certain period of time, when lacking of for example
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