The Coupling of Photocatalytic Oxidation Processes with Activated Carbon Technologies and the Comparison of the Treatment Methods for Organic Removal from Surface Water

Authors: N. Areerachakul

Abstract:

The surface water used in this study was collected from the Chao Praya River at the lower part at the Nonthaburi bridge. It was collected and used throughout the experiment. TOC (also known as DOC) in the range between 2.5 to 5.6 mg/l were investigated in this experiment. The use of conventional treatment methods such as FeCl3 and PAC showed that TOC removal was 65% using FeCl3 and 78% using PAC (powder activated carbon). The advanced oxidation process alone showed only 35% removal of TOC. Coupling advanced oxidation with a small amount of PAC (0.05g/L) increased efficiency by upto 55%. The combined BAC with advanced oxidation process and small amount of PAC demonstrated the highest efficiency of up to 95% of TOC removal and lower sludge production compared with other methods.

Keywords: Advanced oxidation process, TOC, PAC

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1072289

References:

[1] Collins, M. R., G. L. Army, and C. Steelink. 1986. Molecular weight distribution, carboxylic acidity, and humic substances content of aquatic organic matter: Implications for removal during water treatment. ENVIRON. SCI. TECHNOL. 20:1028-1032.
[2] Guzzella, L., D. Feretti, and S. Monarca. 2002. Advanced oxidation and adsorption technologies for organic micropollutant removal from lake water used as drinking-water supply. Water Research 36:4307-4318. (Book style).Belmont, CA: Wadsworth, 1993, pp. 123-135.
[3] Vijarn, S. 2002. A Decade of water quality monitoring in Thailand,s four major river: The results and the implications for management. Bureau of Water Quality Management, Pollution Control Department, Ministry of Natural Resource and Environment,Thailand
[4] Shon, H. K., S. Vigneswaran, I. S.Kim, J. Cho, and H. H. Ngo. 2004. The effect of pretreatment to ultrafiltration of biologically treated sewage effluent: a detailed effluent organic matter (EfOM) characterization. Water Research 38:1933 - 1939.
[5] Ince, N. H., and I. G. Apikyan. 2000. Combination of activated carbon adsorption with light-enhanced chemical oxidation via hydrogen peroxide. Water Research 34:4169-4176
[6] Hu, C., T. Yuchao, L. Lanyu, H. Zhengping, W. Y. and, and T. Hongxiao. 2004. Effects of inorganic anions on photoactivity of various photocatalysts under different conditions. Journal of Chemical Technology and Biotechnology 79:P. 247-252.
[7] Abdullah, M., G. Low, and R. Mathew. 1990. Effects of common inorganic anion rates of photo catalytic oxidation of organic carbon over illuminated titanium dioxide. Journal of Physical Chemistry 94:p 6820 - 6825.
[8] Selcuk, H., e. J. Sene, and M. A. Anderson. 2003. Photoelectrocatalytic humic acid degradation kinetics and effect of pH, applied potential and inorganic ions. Journal of Chemical Technology and Biotechnology 78:979-984.
[9] Nathaporn, A., H. K. Shon, Vigneswaran, S., and Ngo, H. H. 2006. Photocatalytic hybrid system in degradation of herbicide (metsulfuronmethy)." Water Science and Technology: Water supply, 6(2), 109 -114.
[10] Laszlo Erdei, Nathaporn Arecrachakul, Saravanamuthu Vigneswaran, 2008. A combined photocatalytic slurry reactor-immersed membrane module system for advanced wastewater treatment. Seperation and purification Technology 62: 382- 388