Effects of temperature on nitrous oxide (N2O) emission from intensive aquaculture system

The Science of the Total Environment
Shukra Raj PaudelJae Woo Lee

Abstract

This study examines the effects of temperature on nitrous oxide (N2O) emissions in a bench-scale intensive aquaculture system rearing Koi fish. The water temperature varied from 15 to 24 °C at interval of 3 °C. Both volumetric and specific rate for nitrification and denitrification declined as the temperature decreased. The concentrations of ammonia and nitrite, however, were lower than the inhibitory level for Koi fish regardless of temperature. The effects of temperature on N2O emissions were significant, with the emission rate and emission factor increasing from 1.11 to 1.82 mg N2O-N/d and 0.49 to 0.94 mg N2O-N/kg fish as the temperature decreased from 24 to 15 °C. A global map of N2O emission from aquaculture was established by using the N2O emission factor depending on temperature. This study demonstrates that N2O emission from aquaculture is strongly dependent on regional water temperatures as well as on fish production.

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May 2, 2002·Computers, Informatics, Nursing : CIN·Stephen Timmons
Aug 12, 2009·Water Research·Marlies J KampschreurMark C M van Loosdrecht

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Citations

May 1, 2016·Applied and Environmental Microbiology·Ines M HeisterkampPeter Stief
Mar 15, 2020·Environmental Science and Pollution Research International·Sania ShaherAnanda Deb Mukherjee

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