Denitrification under high nitrate concentration and alternating anoxic conditions

被引：65

作者：

Bilanovic, D

Battistoni, P

Cecchi, F

Pavan, P

Mata-Alvarez, J

机构：

[1] Univ Barcelona, Dept Chem Engn, E-08028 Barcelona, Spain

[2] Salisbury State Univ, Henson Sch Sci & Technol, Dept Biol, Salisbury, MD 21801 USA

[3] Univ Ancona, Dipartimento Sci Mat & Terra, I-60131 Ancona, Italy

[4] Univ Aquila, Dept Chem Chem Engn & Mat, I-67100 Laquila, Italy

[5] Univ Venice, Dept Environm Sci, I-30123 Venice, Italy

来源：

WATER RESEARCH | 1999年 / 33卷 / 15期

关键词：

denitrification; bio-flocks; fed-batch; oxy-anoxy; anaerobic digester effluent;

D O I：

10.1016/S0043-1354(99)00049-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Denitrification under high nitrate concentration was studied in a fed-batch mode. Methanol, sodium acetate and effluent from anaerobic digesters (AD) were compared as the carbon sources. An alternating oxy-anoxy regime (10 min aeration over a period of 110 min) seems to promote the establishment of denitrifying bio-flocks of good settling characteristics. The bio-flocks produced in an anoxic reactor were of inferior settling characteristics. Bio-flocks at concentrations of 4 to 5 g VSS/l denitrify efficiently on all three carbon sources tested. A maximum nitrate removal rate was found to be 0.486 g NO3--N/(g VSS day). Nitrite accumulated initially but its concentration decreased with time and eventually reached zero when acetate or AD effluent were used as the carbon source. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：3311 / 3320

页数：10

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