Reducing Humic Acid and Disinfection By-products in Raw Water using a Bio-activated Carbon Filter
For stricter drinking water regulations in the future, reducing the humic acid and disinfection byproducts in raw water, namely, trihalomethanes (THMs) and haloacetic acids (HAAs) is worthy for research. To investigate the removal of waterborne organic material using a lab-scale of bio-activated carbon filter under different EBCT, the concentrations of humic acid prepared were 0.01, 0.03, 0.06, 0.12, 0.17, 0.23, and 0.29 mg/L. Then we conducted experiments using a pilot plant with in-field of the serially connected bio-activated carbon filters and hollow fiber membrane processes employed in traditional water purification plants. Results showed under low TOC conditions of humic acid in influent (0.69 to 1.03 mg TOC/L) with an EBCT of 30 min, 40 min, and 50 min, TOC removal rates increases with greater EBCT, attaining about 39 % removal rate. The removal rate of THMs and HAAs by BACF was 54.8 % and 89.0 %, respectively.
 Khan, E., R. W. Babcock, I. H. Suffet and M. K. Stenstorm, "Biodegradable dissolved organic carbon for indicating wastewater
reclaimation plant performance and treated wastewater quality", Wat.
Environ. Res., vol. 7, pp. 1033-1040, 1998.
 Barber, L.B., Leenheer, J.A., Noyes, T.I. and Stiles, E.A., "Nature and
transformation of dissolved organic matter in treatment wetlands", Environ. Sci. Technol., vol. 35, pp.4805-4816, 2001.
 Bolto, B., G. Abbt-Braun, D. Dixon, R. Eldridge, F. Frimmel, S. Hesse,
King, S. & Toifl, M., "Experimental evaluation of cationicpolyelectrolytes for removing natural organic matter from water", Water
Science and Technology, vol. 40, no. 9, pp. 71-79, 1999.
 Jacangelo, J. G., Aieta, E. M., Carns, K.E., Cummings, E. W., and
Mallevialle J., "Assessing hollow-fiber ultrafiltration for particulate
removal." J. AWWA, vol. 89, 1989.
 Hsin-Hsin Tung, Richard F. Unz and Yuefeng F. Xie, "Evidences of
HAAs Biodegradation in GAC Filtration", J, Environ. Eng. Manage., vol.
19, no. 1, pp. 59-66, 2009.
 Pearce, G. K., Heijnen, M. and Reckhouse, J., "Using ultrafiltration
membrane technology to meet UK cryptosporidium regulations",
Membrane Technology, vol. 2002, vo. 1, pp. 6-9, 2002.
 Su, D. J. and Gao, N. Y., "A study of removing organic matters in slightly
-polluted water by an ozone-active carbon combined process",
Ind.WaterWaste-water, vol. 32, pp. 26-28, 2005.
 Gai, X. J. and Kim, H. S., "The role of powdered activated carbon in
enhancing the performance of membrane systems for water treatment",
Desalination, vol. 225, pp. 288-300, 2008.
 Servais, P., Laurent, P. and Randon, G., "Comparison of the bacterial
dynamics in various french distribution system." J Water SRT-Aqua., vol.
44, no. 1, pp. 10-17, 1995.