Method & Apparatus for Treating Sewage – a 1980 patent
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Method & Apparatus for Treating Sewage – a 1980 patent
Abstract
Steps are disclosed in a method for the complete treatment of sanitary sewage comprising water containing suspended or dissolved organic matter, the concentration of which is measured by biochemical oxygen demand (BOD). A part of the method relies upon a waste stabilization pond containing algae for aerobic decomposition of the organic matter, followed by removal of algae in a second algae removal pond. Another aspect of the invention is provision of a polishing pond constructed with a circumferential weir for maximizing exposure to sunlight and for aeration. A further aspect of the method of the invention involves optional provision of a facultative pond of increased capacity for reduction of BOD by use of combined aerobic and anaerobic treatment which avoids the drawbacks commonly associated with entirely anaerobic treatment processes.
Patent number: 4209388
Filing date: Nov 6, 1978
Issue date: Jun 24, 1980
Inventor: Arthur A. DeFraites
More info on the patent from here
Nature gave us oil from algae; perhaps we should try Nature’s way again
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algOS – Biodiesel from Algae Open Source
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