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4780208 Process for purification of effluent
Biological Waste Treatment and Pollution Control
4776960 PLANT FOR AEROBIC BIOLOGICAL TRANSFORMATION OF ORGANIC WASTE Manlio Cerroni, 1 Roma, Italy A plant for the aerobic biological transformation of organic waste materials, in which the stirring screws which control the agitation and the forward movement of the material I~ing treated are immersed in the biomass, ~,nd thus operate actively, when moving in the direction opposite the movement of said material, while, in the opposite course, i.e., in the direction which is concurrent with the movement of the material, they are extracted from the biomass, with the axis of the stirring screws being inclined at an appropriate angle, which is preferably between 10 and 60 degrees, with respect to the vertical, with the material being moved towards the unloading area by the displacement in the loading area of the screws, which are inclined and rotating in the raising direction of the biomass. In addition, the screws vary this angle, inceasing with respect to the vertical, by gradually moving from the material unloading side on the reservoir towards the loading side, while the distance of said screws from the bottom remains constant.
A process for the purification of effluent, in which the effluent to be purified is first introduced into a high-loaded activation stage operated as an adsorption stage, then is passed through an intermediate clarifier with sludge offtake and subsequently introduced into a lowloaded stage to which a final clarification stage with sludge offtake is connected. Microorganisms work in the adsorption stage. The sludge is maintained in the initiation phase by means of the sludge takeoff from the intermediate clarification stage. Nitrification and subsequently denitrification can be carried out in the low-loaded stage. Sludge from the intermediate clarification stage can be reintroduced as recycled sludge into the adsorption stage, and sludge from the final clarification stage can be reintroduced as recycled sludge into the lowloaded stage. Also excess sludge is drawn offand thickened. The effluent is first treated in the adsorption stage under optionally-anaerobic conditions and before it flows out into the intermediate clarification stage is treated under aerobic conditions. The turbid water from sludge thickening and sludge de-watering is treated with precipitating agents before it is reconveyed to the inflow of the filter plant.
4780415 METHOD OF DEGRADING ORGANIC PRODUCTS, BYPRODUCTS AND SCRAPS IN AN ANAEROBIC MEDIUM
4780208
Gilber Ducellier, Andre Pavia, 34000 Montpellier, France assigned to Ducellier Gilbert; Pavia Andre; Union Industrielle et d'EntrepriseValor
PROCESS FOR PURIFICATION OF EFFLUENT Both Bohnke, Bernd Diering, D 5100 Aachen, Federal Republic Of Germany assigned to Bohnke Both
A method and apparatus for carrying out a degradation in an anaerobic medium, such as a
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4776960 PLANT FOR AEROBIC BIOLOGICAL TRANSFORMATION OF ORGANIC WASTE Manlio Cerroni, 1 Roma, Italy A plant for the aerobic biological transformation of organic waste materials, in which the stirring screws which control the agitation and the forward movement of the material I~ing treated are immersed in the biomass, ~,nd thus operate actively, when moving in the direction opposite the movement of said material, while, in the opposite course, i.e., in the direction which is concurrent with the movement of the material, they are extracted from the biomass, with the axis of the stirring screws being inclined at an appropriate angle, which is preferably between 10 and 60 degrees, with respect to the vertical, with the material being moved towards the unloading area by the displacement in the loading area of the screws, which are inclined and rotating in the raising direction of the biomass. In addition, the screws vary this angle, inceasing with respect to the vertical, by gradually moving from the material unloading side on the reservoir towards the loading side, while the distance of said screws from the bottom remains constant.
A process for the purification of effluent, in which the effluent to be purified is first introduced into a high-loaded activation stage operated as an adsorption stage, then is passed through an intermediate clarifier with sludge offtake and subsequently introduced into a lowloaded stage to which a final clarification stage with sludge offtake is connected. Microorganisms work in the adsorption stage. The sludge is maintained in the initiation phase by means of the sludge takeoff from the intermediate clarification stage. Nitrification and subsequently denitrification can be carried out in the low-loaded stage. Sludge from the intermediate clarification stage can be reintroduced as recycled sludge into the adsorption stage, and sludge from the final clarification stage can be reintroduced as recycled sludge into the lowloaded stage. Also excess sludge is drawn offand thickened. The effluent is first treated in the adsorption stage under optionally-anaerobic conditions and before it flows out into the intermediate clarification stage is treated under aerobic conditions. The turbid water from sludge thickening and sludge de-watering is treated with precipitating agents before it is reconveyed to the inflow of the filter plant.
4780415 METHOD OF DEGRADING ORGANIC PRODUCTS, BYPRODUCTS AND SCRAPS IN AN ANAEROBIC MEDIUM
4780208
Gilber Ducellier, Andre Pavia, 34000 Montpellier, France assigned to Ducellier Gilbert; Pavia Andre; Union Industrielle et d'EntrepriseValor
PROCESS FOR PURIFICATION OF EFFLUENT Both Bohnke, Bernd Diering, D 5100 Aachen, Federal Republic Of Germany assigned to Bohnke Both
A method and apparatus for carrying out a degradation in an anaerobic medium, such as a
114