锰砂/H2O2/O3体系预处理高浓度甲醛废水的中试研究

Pilot Scales of Manganese Sand/H2O2/O3 Pretreatment Process of High Concentration of Formaldehyde Wastewater

To solve the problems of high sludge production， easy scaling in pipes and high colour of effluent from treating formaldehyde a wastewater with lime， a pilot study was conducted to treat the wastewater of a pharmaceutical company with a high concentration of formaldehyde using the manganese sand/H2O2/O3 catalytic oxidation system， where the reaction conditions affecting the catalysis were investigated. The results show? that the removal rates of formaldehyde，chemical oxygen demand and chromaticity reach 87.3%， 60.0% and 95.0% respectively when the ozone dosage is 100g/h， reaction time is 2h， the hydrogen peroxide?dosage is 0.30% of the wastewater， reaction temperature is 40℃ and the manganese sand dosage is 60% of the container. The content of organic pollutants is significantly reduced after the formaldehyde wastewater is treated by the manganese sand/H2O2/O3 catalytic oxidation system. This technology has the advantages of high oxidation efficiency and simple operation without secondary pollution， which can provide a reference for the treatment of high concentration formaldehyde wastewater.