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Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation

Paper ID Volume ID Publish Year Pages File Format Full-Text
35587 45097 2008 7 PDF Available
Title
Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation
Abstract

The nitrification and nitrite accumulation were studied in various free ammonia (FA) concentration and temperature combinations. Both ammonia oxidation rate and nitrite oxidation rate increased significantly with the increase in temperature from 10 to 30 °C. The increase in the substrate oxidation rate with temperature was relatively faster for ammonia than nitrite. Nitrite accumulation started to occur at 20 °C when the specific oxidation rate of ammonia showed a higher value than that of nitrite. Subsequently, the nitrite accumulation continuously increased with the increasing temperature from 20 to 30 °C. The broad range in FA concentration exhibited negligible effect on the specific substrate utilization rate as well as the relative nitrite accumulation. On the basis of Arrhenius equation, the activation energies of ammonia oxidation were 87.1 and 38.6 kJ mol−1 in the temperature ranges 10–20 °C and 20–30 °C, respectively. However for the nitrite oxidation, the activation energy was obtained as a constant value of 34.2 kJ mol−1 in the temperature range of 10–30 °C.

Keywords
Nitrite accumulation; Nitrification; Free ammonia; Temperature; Activation energy; Nitrifier
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Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 43, Issue 2, February 2008, Pages 154–160
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us