EFFECT OF DISSOLVED OXYGEN CONCENTRATION ON NITRIFICATION AND DENITRIFICATION

• Main Author: ABDUL AZIZ, SHARIL NIZA
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2005
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/7633/1/2005%20-%20EFFECT%20OF%20DISSOLVED%20OXYGEN%20CONCENTRATION%20ON%20NITRIFICATION%20AND%20DENITRIFICATION.pdf; http://utpedia.utp.edu.my/7633/

The effectof the dissolved oxygen concentration onthe nitrification and denitrification has beeninvestigated worldwide by numbers of researcher. It hasbeen proposed that several others factors also has affected the rate of the nitrification and denitrification process such as the pH, temperature, inhibitory andtoxicmaterials. However, for this research, only the dissolved oxygen factorwill be studied. Themainobjective of thisresearch is to study the effectof dissolved oxygen concentrations on the rate ofnitrification and denitrification process. In addition to that, this research also will include the studyof someof the equations which weredeveloped by other researchers in order to determine theeffect ofDO concentrations ontherate of the nitrification and denitrification process. For this research, theequation formass transport which is solved byQUAL2E is going to beputto test by using theFEMLAB software. This equation includes theeffects of advection, dispersion, dilution, constituent reactions and interactions, and sources and sinks. However, only the sources and sinks factor is beingmodified. Fornitrification, it is proven thatastheDO concentration increases, the growth rate ofthe nitrifiers will also increase. Hence, the nitrification rate will also increase. For this nitrification process, theDouble-Monod equation is found to best fittheresearch objective. For denitrification, it is also proven that as theDOconcentration increases, the growth rate of denitrifiers will decreases. Hence, the nitrification rate will also decrease. For this process, the Activated Sludge Model (Two-parameter Model) equation is found to best fit the research objective in determining the effectof dissolved oxygen concentration in denitrification. m