Title of article :
Novel autotrophic nitrogen removal system using gel entrapment technology
Author/Authors :
Isaka، نويسنده , , Kazuichi and Itokawa، نويسنده , , Hiroki and Kimura، نويسنده , , Yuya and Noto، نويسنده , , Kazuhiko and Murakami، نويسنده , , Takao، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
7
From page :
7720
To page :
7726
Abstract :
A pilot plant involving a nitritation–anammox process was operated for treating digester supernatant. In the preceding nitritation process, ammonium-oxidizing bacteria were immobilized in gel carriers, and the growth of nitrite-oxidizing bacteria was suppressed by heat-shock treatment. For the following anammox process, in order to maintain the anammox biomass in the reactor, a novel process using anammox bacteria entrapped in gel carriers was also developed. The nitritation performance was stable, and the average nitrogen loading and nitritation rates were 3.0 and 1.7 kg N m−3 d−1, respectively. In the nitritation process, nitrate production was completely suppressed. For the anammox process, the startup time was about two months. Stable nitrogen removal was achieved, and an average nitrogen conversion rate of 5.0 kg N m−3 d−1 was obtained. Since the anammox bacteria were entrapped in gel carriers, stable nitrogen removal performance was attained even at an influent suspended solids concentration of 1500 mg L−1.
Keywords :
Nitritation , nitrogen removal , Gel entrapment , Digester supernatant , Anammox
Journal title :
Bioresource Technology
Serial Year :
2011
Journal title :
Bioresource Technology
Record number :
1924860
Link To Document :
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