Apparatus with semi-permeable membrane, and method for cultivating micro-organisms
Patent 4416993 Issued on November 22, 1983. Estimated Expiration Date: 
June 11, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 11, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3186917 3269542 3301401 3732160 Treatment of waste water Method and unit for wastewater treatment by microorganisms Patent #: 4165281 InventorAssigneeApplicationNo. 06/272547 filed on 06/11/1981US Classes:435/243, MICRO-ORGANISM, PER SE (E.G., PROTOZOA, ETC.); COMPOSITIONS THEREOF; PROCES OF PROPAGATING, MAINTAINING OR PRESERVING MICRO-ORGANISMS OR COMPOSITIONS THEREOF; PROCESS OF PREPARING OR ISOLATING A COMPOSITION CONTAINING A MICRO-ORGANISM; CULTURE MEDIA THEREFOR210/150, WITH GAS-LIQUID SURFACE CONTACT MEANS210/151, With separator210/611, For or with specific microorganism210/615, Utilizing contact surfaces supporting microorganism (e.g., trickling filter, etc.)210/620, Aerobic treatment435/297.2, Including perfusion means435/813CONTINUOUS FERMENTATIONExaminersPrimary: Marantz, SidneyAttorney, Agent or FirmInternational ClassesC12M 1/12 (20060101)C02F 3/34 (20060101) AbstractApparatus for and method of cultivating micro-organisms.The apparatus includes a tank 10 in which the cultivation medium flows, for example sewage or trade effluent to be treated. Within the tank are hollow plates 11 into which flows an oxygenating gas. The plates have walls of gas-permeable material to the outer face of which the micro organisms adhere. Air or oxygen within the plates pass through the wall and through the layer of micro organisms, to provide an aerobic biomass 20 (FIG. 3). This biomass is thicker or more active than the aerobic layer 21 of apparatus where the biomass is acted upon only from the outer faces such as in fuller beds (FIG. 1) or rotary discs (FIG. 2).Tubes or troughs may be used instead of plates; the tubes may be upright or horizontal with the air or oxygen passing therethrough. The troughs may be open topped.The plate, tube or trough consists of a frame 14, a net 15 mounted on the frame and supporting the gas-permeable walls, which may be of micro porous material 16. |
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