Occurrence and Removal of Earthy-Musty Odorants in Two Waterworks in Kinmen Island, Taiwan
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 18, Issue 3
Abstract
In this study, the occurrence and treatment of two earthy-musty odorants, geosmin and 2-MIB, produced by cyanobacteria is investigated at two conventional drinking-water treatment plants (WTPs) at Kinmen Island, Taiwan. Samples of the source, processed, and finished waters and tap water at the two WTPs were collected and analyzed. Both geosmin and 2-MIB were commonly detected in most water samples, with the 2-MIB concentration much higher than the geosmin concentration. About 78% of the source water samples and 35% of the finished and tap water samples showed detected 2-MIB levels higher than the odor threshold concentration (OTC, ). Sampling and analysis of the reservoir water indicated that 2-MIB is uniformly distributed in the reservoir, with of which existing in the dissolved phase. The chlorination study of the raw water indicates that both geosmin and 2-MIB are resistant to chlorine. However, the cyanobacterial cells in raw water were effectively ruptured within15 min of the contact time when a chlorine dosage of was applied at the WTPs. A monitoring of the processed water at WTPs shows that the flotation process is most effective to the removal of cyanobacteria, with about 77–79% efficiency, compared to achieved with the whole treatment train. Removal of 2-MIB by the treatment processes before flotation was only about 17–28%, which may be limited to the low ratio of cell-bound 2-MIB. The two sand filtration processes removed 23–47% of 2-MIB, due probably to the biological degradation of dissolved 2-MIB. For the two WTP studied, the removal of 2-MIB was about 74%. It is shown that 2-MIB is a major odorant in the drinking water source and the finished water at Kinmen Island. The current processes are not sufficient to remove 2-MIB to a level below the OTC. Advanced processes are needed to effectively remove the odorant.
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Acknowledgments
This study was funded in part by the Taiwan Environmental Protection Administration under Contract Number EPA-98-U1J1-02-101, Taiwan National Science Council under Grant Number NSC102-2119-M-002-008, and Technology Development Project of Water Resources Agency, Ministry of Economic Affairs, Taiwan, under Contract Number MOEAWRA0990433.
References
American Public Health Association (APHA). (2000). Supplement to standard methods for the examination of water and wastewater, 20th Ed., American Public Health, Association/American Water Works Association/Water Environment Federation, Denver, CO.
Brookes, J. D., and Carey, C. C. (2011). “Resilience to blooms.” Science, 334(6052), 46–47.
Chang, D. W., Hsieh, M. L., Chen, Y. M., Lin, T. F., and Chang, J. S. (2011). “Kinetics of cell lysis for Microcystisaeruginosa and NitzschiaPalea in the exposure to -cyclocitral.” J. Hazard. Mater., 185(2–3), 1214–1220.
Chen, Y. M., Hobson, P. P., Burch, M. D., and Lin, T. F. (2010). “In-situ measurement of geomsin and MIB emission from benthic cyanobacteria mat.” J. Environ. Monitor., 12(3), 769–775.
Chorus, I. (2005). “Editorial summary.” Current approaches to cyanotoxin risk assessment, risk management and regulations in different countries, I. Chorus, ed., Federal Environmental Agency, Berlin, 41–47.
Daly, R. I., Ho, L., and Brookes, J. D. (2007). “Effect of chlorination on Microcystis aeruginosa cell integrity and subsequent microcystin release and degradation.” Environ. Sci. Technol., 41(22), 4447–4453.
Ho, L., Hoefel, D., Bock, F., Saint, C. P., and Newcombe, G. (2007). “Biodegradation rates of 2-methylisoborneol (MIB) and geosmin through sand filters and in bioreactors.” Chemosphere, 66(11), 2210–2218.
Hsieh, S. T., Lin, T. F., and Wang, G. S. (2010). “Biodegradation of MIB and geosmin with slow sand filters.” J. Environ. Sci. Health, Part A, 45(8), 951–957.
Lalezary, S., Pirbazari, M., and McGuire, M. J. (1986). “Oxidation of five earthy-musty taste and odor compounds.” J. Am. Water Works Assoc., 78(3), 62–69.
Lin, T. F., et al. (2012). “Off-flavours in the aquatic environment: A global issue.” Global trends & challenges in water science, research and management-A compendium of hot topics and features from IWA Specialist Groups, H. Li, ed., International Water Association, London, 58–63.
Lin, T. F., Chang, D. W., Lien, S. K., Tseng, Y. S., Chiu, Y. T., and Wang, Y. S. (2009). “Effect of chlorination on the cell integrity of two noxious cyanobacteria and their release of odorants.” J. Water Supply Res. Tech., 58(8), 539–551.
Lin, T. F., Liu, C. L., Yang, F. C., and Hoang, S. W. (2003). “Effect of residual chlorine on the analysis of geosmin, 2-MIB and MTBE in drinking water using the SPME technique.” Water Res., 37(1), 21–26.
Lin, T. F., Wong, J. Y., and Kao, H. P. (2002). “Correlation of musty odor and 2-MIB in two drinking water treatment plants in South Taiwan.” Sci. Total Environ., 289(1–3), 225–235.
Newcombe, G. (2005). “Treatment of cyanobacteria and cyanotoxins in drinking water.” Proc., 1st Int. Conf. on Sustainable Water Environment: Water Resource and Quality Management, National Taiwan Univ., Taipei, Taiwan.
Paerl, H. W., and Huisman, J. (2008). “Blooms like it hot.” Science, 320(5872), 57–58.
Suffet, I. H., Khiari, D., and Bruchet, A. (1999). “The drinking water taste and odor wheel for the millenium: Beyond geosmin and 2-methylisoborneol.” Water Sci. Technol., 40(6), 1–13.
Taiwan Environmental Protection Administration (TWEPA). (2013). “Environmental water quality information system.” http://wq.epa.gov.tw/.
Tung, S. C., Lin, T. F., Yang, F. C., and Liu, C. L. (2008). “Seasonal change of 2-MIB and correlation with environmental parameters in Feng-Shen Reservoir, Taiwan.” Environ. Monit. Assess., 145(1–3), 407–416.
Watson, S. B. (2003). “Cyanobacterial and eukaryotic algal odour compounds: Signals or by-products? A review of their biological activity.” Phycologia, 42(4), 332–350.
Watson, S. B., Brownlee, B., Stachwill, T., and Hargesheimer, E. H. (2000). “Quantitative analysis of trace levels of geosmin and MIB in source and drinking water using headspace SPME.” Water Res., 34(10), 2818–2828.
Westerhoff, P., Rodriguez-Hernandez, M., Baker, L., and Sommerfeld, M. (2005). “Seasonal occurrence and degradation of 2-methylisorboneol in water supply reservoirs.” Water Res., 39(20), 4899–4912.
Yen, H. K., Lin, T. F., and Liao, P. C. (2011). “Simultaneous detection of nine cyanotoxins in drinking water using dual solid-phase extraction and liquid chromatography—Mass spectrometry.” Toxicon, 58(2), 209–218.
Zamyadi, A., et al. (2010). “Release and oxidation of cell-Bound saxitoxins during chlorination of Anabaena circinalis cells.” Environ. Sci. Technol., 44(23), 9055–9061.
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© 2014 American Society of Civil Engineers.
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Received: May 28, 2013
Accepted: Jul 8, 2013
Published online: Jul 10, 2013
Published in print: Jul 1, 2014
Discussion open until: Jul 5, 2014
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