Application of ozone and hydrogen peroxide in textile wastewater treatment

Textile wastewater is known to be highly resistant to biodegradation under both natural and wastewater treatment plant conditions. However ozonation a nd UV-radiation can be used to increase the biodegradability of the biologi cally resistant compounds. In our studies two different real textile wastew ater samples were taken from a knitting company located in Lodz, Poland. Dy eing wastes Ic,ere treated by the following methods: ozonation, hydrogen pe roxide treatment and simultaneous oxidation by ozone and hydrogen peroxide. The effluents before and after the treatment were analysed according to th e requirements of applicable Polish Standards, which included pH, colour th reshold COD a,rd BOD, anionic surfactants, and soluble substances. The aim of these experiments was to compare the yield of impurity destruction in th e effluents treated. Generally the best results were obtained by the simult aneous use of ozonation and hydrogen peroxide. The results obtained suggest that simultaneous ozonation and use of hydrogen peroxide can be applied su ccessfully on a technological scale.