Photoenhanced anaerobic digestion of organic acids
Patent 4919813 Issued on April 24, 1990. Estimated Expiration Date: 
August 25, 2009. 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.
August 25, 2009. 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 ReferencesControlled natural purification system for advanced wastewater treatment and protein conversion and recovery Anaerobic filter Method for processing waste Anaerobic digester technology Photosynthetic bioconversion sulfur removal Patent #: 4666852 InventorApplicationNo. 398604 filed on 08/25/1989US Classes:210/603, Including collecting or storing gas (e.g., fuel, carbon monoxide, etc.)210/610, Including adding ancillary growth medium for microorganism210/611, For or with specific microorganism210/613, Digesting sludge435/267, Treating animal or plant material or micro-organism435/801ANEROBIC CULTIVATIONExaminersPrimary: Wyse, Thomas G.Attorney, Agent or FirmInternational ClassC02F 003/28AbstractA process is described for rapid conversion of organic acids and alcohols anaerobic digesters into hydrogen and carbon dioxide, the optimal precursor substrates for production of methane. The process includes addition of photosynthetic bacteria to the digester and exposure of the bacteria to radiant energy (e.g., solar energy). The process also increases the pH stability of the digester to prevent failure of the digester. Preferred substrates for photosynthetic bacteria are the organic acid and alcohol waste products of fermentative bacteria. In mixed culture with methanogenic bacteria or in defined co-culture with non-aceticlastic methanogenic bacteria, photosynthetic bacteria are capable of facilitating the conversion or organic acids and alcohols into methane with low levels of light energy input.Field of SearchIncluding collecting or storing gas (e.g., fuel, carbon monoxide, etc.)Anaerobically, with subsequently aerobically treating liquid Including dewatering sludge Including adding ancillary growth medium for microorganism For or with specific microorganism And regulating temperature during biological step Digesting sludge And anaerobic treatment Including geographic feature (e.g., drainage ditch, septic, pond) Geographic (e.g., drainage ditch, septic, pond) Utilizing media containing lower alkanol (i.e., having one to six carbon atoms) ANEROBIC CULTIVATION Treating animal or plant material or micro-organism |
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