Intermediate Product Profile as a Result of Ozone Oxidation of Industrial Wastewater

Abstract

The following were found when testing the wastewater in the study: 0.38% 7-Hydroxy-7-phenly-3,9-diisopropyl-2,10-dioxadispiri, 1.71% 2-Propanone (CAS) Acetone, 20.87% 2-propanol, 2-methyl- (CAS) tert-Butyl alcohol, 14.92% 2-Butanone (CAS) Methyl ethyl ketone, 62.11% Hydroperoxide, 1,1-dimethyl (CAS) Cadox TBH, COD (10,000-23,725 mg COD / l), total kjeldahl nitrogen (<6.2 mg / l), free chlorine (<0.05 mg / l) and chloride (> 9,042 mg / l). The water was then oxidated using ozone (4.1 g / h) and intermediate product formation and COD removal efficiency were studied. The current wastewater characteristics vary in line with product supply and demand.In this study, a cylinder reactor with an internal diameter of 5.8 cm and a height of 1.7 meters was used for ozonation (4.1 g/saat). After seven hours of ozonation, the wastewater pH value fell below four, showing that complex compounds were broken down to organic acids. At the end of the first, third, fourth, fifth and sixth hours of the ozonation process, respectively, nitrogen oxide (H), N, 2-Dimethydodecylamine (K), Propanoic acid, 2-hydroxy-2-methyl (hydroxybutyric) (L), 2-Butanone, 3-hydroxy-3-methyl (M), 2,3 Butanedione (diacetyl) (N), Ammonium bicarbonate (O) ), Carbamicacid, monoammonium salt (Ammonium Carbamat) (P), Acetic acid, ethoxy-, 1-methylethyl ester (R) intermediates were formed. After seven hours of ozonation, the influent COD decreased from 17,000 mg / l to 2,860 mg / l. As a result of the ozone process, the organic substances were mostly transformed into 2-propanone (Acetone) (B) and 2-propanol, 2-methyl (tert-butyl alcohol) (C).

Keywords: Ozonation, COD, Industrial wastewater, Intermediate product

DOI: 10.7176/CER/11-10-03

Publication date: November 30^th 2019