Wastewater treatment method for removing organic matter and nitrogen, carrier used thereof and method for manufacturing the carrier
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United States of America Patent
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Apr 16, 2002
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app pub date -
Sep 27, 2000
filing date -
Mar 31, 1998
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Abstract
A wastewater treatment method for removing organic matter and nitrogen from wastewater. In the wastewater treatment method, an excessive amount of organic matter which prevents nitrifying bacteria from growing is removed in a leading aeration tank, and the conditions of the aeration tank are optimized using the nitrifying carrier to which a great amount of nitrifying bacteria can be attached for growth, such that the nitrifying bacteria can multiply therein. As a result, a large amount of wastewater can be treated within a short time, and it is possible to stably cope with a change in load of the organic matter of the wastewater. Thus, the wastewater treatment apparatus can be smaller, and an improvement in performance thereof can be expected. Also, the wastewater can be treated stably during the winter season when the activity of the nitrifying bacteria becomes low, so that the wastewater treatment method according to the present invention can be applied to most wastewater treatment plants, e.g., sewage treatment plants, excrement treatment plants, livestock and industrial wastewater treatment plants and the like.
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