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Nitrification in the Contact-Stabilization Process

Wisjnuprapto, S. Saipanich, B. Capdeville & H. Roques


A series of experiment on the contact-stabilization process treating municipal waste water were conducted at various sludge ages. Sludge recycling rates, hydraulic retention times in contact-stabilization reactors, and at constant temperature. A kinetic model of nitrifiers growth rates in the contact reactor were developed based on the calculated values of the experimental results, as a function of sludge age and fractional biomass in the contact reactor. The influence of these parameters on the nitrification efficiency were observed during the experiments; the ammonia removal rate as a function of the VSS and ammonia nitrogen consumption by the microorganisms were determined experimentally.


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