https://scholars.lib.ntu.edu.tw/handle/123456789/77151
Title: | 可同時硝化及脫硝之自營性薄膜生物反應槽之研發及其菌群結構分析(1/2) | Authors: | 曾四恭 | Keywords: | 自營性;同時硝化及脫硝;薄膜生物反應槽;氨氮;硝酸鹽;Simultaneous nitrification and denitrification;biofilm;PVA;silicone membrane | Issue Date: | 31-Jul-2003 | Publisher: | 臺北市:國立臺灣大學環境工程學研究所 | Abstract: | 於矽膠管中通入氫氣,反應槽中則進行曝 氣作用,經過一段時間之馴養後,生物膜應會 自動分層,外側為硝化層進行硝化作用而內側 為脫硝層進行脫硝作用。硝化過程成產生之酸 度可中和脫硝過程產生之鹼度,減少反應槽酸 度或鹼度之加入量。此外,生物膜外側為硝化 層進行硝化作用會消耗氧氣,避免溶氧對內側 生物膜之脫硝造成干擾,因而達到同時硝化、 脫硝之目的。 A PVA-immobilized biofilm, attached to the surface of a silicone tube, was used as the basis of a bioreactor for simultaneous nitrification and denitrification of water. The bioreactor was aerated with air to supply oxygen for nitrification and pure hydrogen was supplied to the silicone tube and diffused through the membrane wall to feed the biofilm for autotrophic denitrification. The bioreactor was effective for the simultaneous nitrification and denitrification of water after a short period of acclimation, while the biofilm exhibited good resistance to the inhibition of denitrification by dissolved oxygen; the denitrification rate decreased by only 8 % as the dissolved oxygen increased from 2 mg/l to saturation. By using PVA crosslinked with sodium nitrate to entrap nitrifying and denitrifying sludge on the surface of a silicone tube, a novel bioreactor for simultaneous nitrification and denitrification was developed. In addition to performing as an immobilizing agent to strengthen the biofilm, PVA protected the denitrifying microorganisms to reduce the inhibition by dissolved oxygen under aerobic condition. Therefore, nitrification and denitrification occurred simultaneously within the biofilm. Furthermore, the immobilization technique shortened the acclimation period of the bioreactor. The described space saving and simple to operate bioreactor for nitrogen removal performed autotrophic denitrification to solve the problem of residual carbon in heterothiphic denitrification, and thus is suitable for removing nitrogen from drinking water. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/22114 | Other Identifiers: | 912211E002032 | Rights: | 國立臺灣大學環境工程學研究所 |
Appears in Collections: | 環境工程學研究所 |
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912211E002032.pdf | 243.67 kB | Adobe PDF | View/Open |
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