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http://dx.doi.org/10.11001/jksww.2018.32.1.019

Nitrogen removal characteristics of pigment wastewater using PAC-A/O process  

Jeong, Jongsik (R&D Center of Ukseung Chemical Co., Ltd)
Publication Information
Journal of Korean Society of Water and Wastewater / v.32, no.1, 2018 , pp. 19-25 More about this Journal
Abstract
The objectives of this study were to evaluate the removal characteristics of total nitrogen, the influence factor of denitrification and the optimum operating condition in the pigment wastewater treatment using PAC-A/O process. The operating conditions of PAC-A/O process were mean BOD volumetric loading $0.86kgBOD/m^3/day$, mean F/M ratio 0.072~0.13 kgBOD/kgMLVSS/day and mean C/N ratio 3.47, respectively. The conditions of anoxic process in the field plant test were mean pH 8.3~8.7 and mean temperature $34.1{\sim}44.0^{\circ}C$. The ORP bending point knee was eventually appeared in the ORP -107 mV and $NO_3{^-}-N$ removal efficiency was increased according to the ORP decrease. In the ORP -107 mV below condition, the removal efficiency of T-N and $NO_3{^-}-N$ was 92.3~95.0% and 98.5~99.7%. Denitrification rate was calculated to be 1.581~1.791 mg $NO_3{^-}-N/gMLSS/hr$. The experimental results showed that the ORP control in the PAC-A/O process could be an effective method for treatment of pigment wastewater.
Keywords
Nitrogen removal; Oxidation reduction potential(ORP); PAC-A/O(Powdered activated carbon-Anoxic/Oxic); Pigment wastewater;
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