Concentrated latex rubber industry is one of the major industries in the Southern region of Thailand. Typically, factories employ pond systems in series to treat large amount of wastewater which contains high organic components. However, the effluent does not meet the Thailand's effluent standards and needs to further treating by other treatment technologies that have ability to degrade the remaining contaminants that cannot be removed by the biological means. Ozonation may be the alternative treatment methods because ozone can directly react with the organic pollutants or indirectly react by hydroxyl radicals result in converting organic pollutants to low molecular weight and ultimately innocuous products such as carbon dioxide (CO2), water (H2O). Laboratory-scale of ozonation was conducted for experiments. Unfiltered and filtered wastewater was used and adjusted pH to about 7 prior to feed to the chamber. The experiments was varied the applied ozone dosages of 0.5:1, 1:1, and 2:1 mg O3/mg COD. Samples were withdrawn for analysis at the contact time of 5, 15, 30, and 60 minutes, respectively. Results of the BOD5/COD ratio of unfiltered and filtered effluent are about 0.14 and 0.10, respectively, indicating that it has substantial amounts of refractory substances that are difficult to be biodegraded. It was found that the removal efficiencies of unfiltered wastewater due to ozonation were independent of ozone dosage. On the other hands, increasing in the ozone dosage resulting in increasing removal efficiencies of ozonation for filtered wastewater.
Wittayakul, P., Danteravanich, S., Ua-kritdathikarn, S., Siriworg, C., and Puetpaiboon, U. (2000) The sulfate removal performance of wastewater treatment systems of concentrated latex factories, In Proc. 2000 on the international symposium of the COE, Tokyo, Japan.
Electric Power Research Institute (EPRI), Municipal Water and Wastewater Program (1997) Environmental Applications of Advanced Oxidation Technologies. In Proc. 1996 the second international symposium, San Francisco, California, USA.
Resource Control Corp. (2000) In-situ oxidation of petroleum hydrocarbons utilizing ozone. New Jersey, USA.
Gottschalk, C., Libra, J. A., Saupe, A. (2000) Ozonation of water and wastewater: a practical guide to understanding ozone and its application. Wiley-VCH. Weinheim, Germany.
Staehelin, J. and Hoigne. (1985) Decomposition of ozone in water in the presence of organic solutes acting as promoters and inhibitors of radicals chain reactions, Envir. Sci. & Tech. 19, 1206-1213.
Langlais B., Reckhow D.A., Brink D.R.(ed.) 1991. Ozone in water treatment. Applications andengineering. Cooperative research report. Lewis Publishers and AWWA Research Foundation, Denver.
Lidia S., Cluadia J., and Santosh N. K. (2001) A comparative study on oxidation of disperse dyes by electochemical process, ozone, hypochlorite and fenton reagent. Water Res. 35 (9), 2129-2136.
Gilbert E. (1987) Biodegradability of ozonation products as a function of COD and DOC elimination by example of substituted aromatic substances. Water Res. 21, 1273-1278.
Beltran, F.J., Rivas, J., Alvarez, P.M., Alonso, M.A., and Acedo, B. (1999) A kinetic model for advanced oxidation processes of aromatic hydrocarbons in water: Application to phenanthrene and nitrobenzene. Ind. Eng. Chem. Res., 38, 4189-4199.
Scott, J.P., and Ollis. D. F. (1995) Integration of chemical oxidation processes for water treatment: review and recommendations. Enviro. Prog., 14, 88.
Cramariuc, R., Velisar, I., Milevschi, V., Munteanu,V., Ghiuta, V., and Tanasescu, F. T. (1998) New considerations of ozone generation and the influence of NOx in ozone production and water treatment. Proc. NATO ARW. -12 November 1998, Bucharest, Romania, NATO Science Series
How to cite this article
Ua-Kritdathikarn, S. (2005). 'Treatment of Refractory Organic Compounds in Treated Latex Wastewater Using Ozonation'. SET Proceedings, 4(1), pp. 294-299. https://doi.org/10.65582/set.2005.066
