Process for separating and converting waste into useable products
OwnerPliny Fiskinventor
Life of this patent
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Abstract
A process for recycling raw sewage and unsorted solid waste by adding the solids removed from sewage to ground unsorted waste forming a sludge, treating the sludge first anaerobically, sterilizing the anaerobically treated sludge, forming the sludge into a slurry, separating the biodegradable from the non-biodegradable material in the slurry by aerobic fermentation, composting the biodegradable material in batches, curing the compost under control conditions to stabilize its fertilizing properties and classifying the biodegradable and non-biodegradable material to provide useable products. The colloidal raw sewage liquor remaining after separation of the sewage solids is converted into pure water.
Claims29
A process for converting waste comprising biodegradeable and non-biodegradeable materials into useable products, comprising the steps of:
- grinding unsorted waste into particulate form;
- anaerobically treating the unsorted waste particles;
- sterilizing the anaerobically treated particles;
- mixing the sterilized particles with an aerobic and enzyme activated liquid to form a slurry;
- inducing the slurry to flow;
- controlling the temperature and pH of the moving slurry to cause fermentation;
- permeating the moving slurry with oxygenating gases to aid in fermentation and in causing the biodegradeable material to rise to the surface of the moving slurry and form a froth;
- removing the biodegradeable froth from the top of the slurry;
- collecting the non-biodegradeable material which settles out;
- adjusting the moisture content of the biodegradeable material to approximately 55%;
- separating the biodegradeable matter into batches and enclosing the batches in individual vessels;
- aerobically treating the biodegradeable matter thus formed in batches thereby raising the internal temperature thereof;
- controlling the environment to stimulate active aerobic bacterial growth in the batches;
- and
- curing the decomposing material so that the carbon to nitrogen ratio becomes established at between about 17/1 and about 22/1.
Dependencies are inferred from the claim text.