Abstract:
PURPOSE: An automatic control apparatus of an advanced oxidation and a method thereof are provided to be able to provide stable and safe water by variably controlling the system operation in consideration of the total reactivity of chemical components inhibiting the production of OH radical in the inflow water, and treating the trace amount of medical substances existing in the water to be processed, tastes and odor materials, and to be able to save energy in operation. CONSTITUTION: An automatic control method of an advanced oxidation process comprises the following steps: a step of selecting elimination target contaminants by monitoring water quality factors of the source water including the UV254 absorbance; a step of measuring the OH radical production inhibition reaction index in consideration of the reactivity of chemical components inhibiting OH radical production by using rhodamine B as an indicator; a step of calculating the UV irradiation amount and the hydrogen peroxide injection amount required in the water treatment system, and the elimination capacity to the elimination target contaminant of the water treatment system in consideration of the selected elimination target contaminant and the measured OH radical production inhibition reaction index; and a step of calculating the UV irradiation amount and the hydrogen peroxide according to a target elimination capacity to the elimination target contaminant, and adjusting the UV irradiation amount and the hydrogen peroxide injection amount by comparing the calculated UV irradiation amount and hydrogen peroxide injection amount. [Reference numerals] (AA) Start; (BB) Selecting elimination target contaminants; (CC) Monitoring UV absorbance in real time (wavelength 254 nm); (DD) Database; (EE) Measuring OH radical production inhibition and reaction indexes; (FF) Extracting quantum yield, molar extinction coefficient and specific reaction rate; (GG) Selecting the rate of elimination target contaminants; (HH) Calculating UV irradiation amount and hydrogen peroxide injection amount (I_0*t) (using math formula 8); (II) (real I_0*t)> targetI_0*t)?; (JJ) Re-adjusting UV irradiation amount; (KK) Revising and control UV irradiation amount and hydrogen peroxide injection amount; (LL) End
Abstract:
수산화라디칼을주요기작으로유해물질을처리하는데적용되는자외선/과산화수소고도산화공정에서단일연속흐름주입관로상에서시료의유속을변경하고자외선강도를일정하게유지하는연속흐름주입방식을적용함으로써, 증류수로희석배율이조정된과산화수소의농도및 지표물질인로다민 B를실시간으로측정할수 있고, 또한, 상수고도처리나하수방류수에서미량유기오염물질을제거하기위하여적용되는고도산화공정에서수산화라디칼소모인자지수를실시간측정함으로써, 자외선/과산화수소고도산화공정을통해서제거되는유해물질의정량적제거능, 자외선조사량및 과산화수소투입량을정확하게산출할수 있으며, 또한, 자외선/과산화수소고도산화공정에대한실시간자가진단및 공정최적화가가능하므로, 수산화라디칼을극대화시키는기술로실용화할수 있는, 고도산화공정의수산화라디칼소모인자지수실시간측정장치및 그방법이제공된다.