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Partial nitrification and oxygen tra...

Cotter, Samuel Wesley.

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Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration./
作者:	Cotter, Samuel Wesley.
面頁冊數:	74 p.
附註:	Source: Masters Abstracts International, Volume: 49-01, page: 0604.
Contained By:	Masters Abstracts International49-01.
標題:	Environmental Studies. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1479974
ISBN:	9781124162980

Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration.
Cotter, Samuel Wesley.

Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration. - 74 p.

Source: Masters Abstracts International, Volume: 49-01, page: 0604.

Thesis (M.S.)--Iowa State University, 2010.

Excess nutrients in lakes, rivers, and streams harm aquatic ecosystems. Advanced treatment at wastewater treatment plants can reduce this pollutant load. An innovative nutrient removal system, ANAMMOX, anaerobically converts ammonium and nitrite to N2 gas. Because this system requires a 1:1.31 NH4+ : NO2- ratio, a partial nitrification system is coupled with the ANAMMOX system to provide the necessary substrates. A hollow fiber membrane reactor was employed to create this partial nitrification system. Gas mass transfer was first evaluated to determine the KLa oxygen transfer coefficient. Reactor parameters, such as mixing speed, membrane length, and gas pressure, were evaluated to determine how KLa was affected by these variables. This hollow fiber membrane was then used to control oxygen delivery to the partial nitrification system, producing an effluent with ammonium and nitrite. Controlling dissolved oxygen at low concentration selects for ammonium oxidizing bacteria, while nitrite oxidizing bacteria are suppressed. This system effectively treated influent ammonium concentrations ranging from 50 mg/L NH4 +-N to 250 mg/L NH4+-N. Real-time polymerase chain reaction (qPCR) was employed to verify the system preference for ammonium oxidizing bacteria. Hollow fiber membrane aeration is effective for controlling oxygen transfer.

ISBN: 9781124162980Subjects--Topical Terms:

1669635
Environmental Studies.

Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration.
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500 $a Adviser: Shihwu Sung.
502 $a Thesis (M.S.)--Iowa State University, 2010.
520 $a Excess nutrients in lakes, rivers, and streams harm aquatic ecosystems. Advanced treatment at wastewater treatment plants can reduce this pollutant load. An innovative nutrient removal system, ANAMMOX, anaerobically converts ammonium and nitrite to N2 gas. Because this system requires a 1:1.31 NH4+ : NO2- ratio, a partial nitrification system is coupled with the ANAMMOX system to provide the necessary substrates. A hollow fiber membrane reactor was employed to create this partial nitrification system. Gas mass transfer was first evaluated to determine the KLa oxygen transfer coefficient. Reactor parameters, such as mixing speed, membrane length, and gas pressure, were evaluated to determine how KLa was affected by these variables. This hollow fiber membrane was then used to control oxygen delivery to the partial nitrification system, producing an effluent with ammonium and nitrite. Controlling dissolved oxygen at low concentration selects for ammonium oxidizing bacteria, while nitrite oxidizing bacteria are suppressed. This system effectively treated influent ammonium concentrations ranging from 50 mg/L NH4 +-N to 250 mg/L NH4+-N. Real-time polymerase chain reaction (qPCR) was employed to verify the system preference for ammonium oxidizing bacteria. Hollow fiber membrane aeration is effective for controlling oxygen transfer.
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