Characterization of natural organic matter and disinfection byproducts formation potential in pilot-scale coagulation-ultrafiltration membrane combined process in winter

Abstract

A pilot-scale ultrafiltration membrane plant was set up for treating Luanhe River water with flocculating and precipitation process of waterworks. The aim is to investigate the variation and characteristics of natural organic matter and disinfection byproducts formation potential in the whole process in winter. The results show that dissolved organic matter (DOM), UV₂₅₄, trihalomethanes formation potential (THMsFP) and haloacetic acids formation potential (HAAsFP) of Luanhe River water were mainly distributed in the range of molecular weight (MW) <1 kDa, so were the membrane feed water and treated water by membrane. Specific UV absorbance, specific THMsFP and specific HAAsFP have the maximal value in the MW fraction of 1–3 kDa, except that specific UV absorbance of membrane feed water is in the range of 3–10 kDa; DOM of membrane backwash water is mainly distributed in the range of MW>30 kDa and MW<1 kDa. It is the DOM in water backwashing in up way that made significant contribution to the higher dissolved organic carbon content in membrane backwash water. However, UV₂₅₄, THMsFP and HAAsFP were mainly distributed in the range of MW<1 kDa. The highest concentrations of specific THMsFP and specific HAAsFP appeared in the MW fraction of 3–10 kDa. CHCl₃ was the major THMs species during MBW chlorination and occupied more than 60% of the total THMsFP. Dichloroacetic acid and trichloroacetic acid were the main components in HAAsFP. The concentration of THMsFP and HAAsFP in MBW was influenced by operation period.

Keywords

THMsFP / HAAsFP / UV₂₅₄ / dissolved organic matter / ultrafiltration

References

[1] Bottinoa A., Capannelli C., Borghi A. D., et al. Water treatment for drinking purpose: Ceramic microfiltration application[J]. Desalination, 2001, 141(1): 75-79.

[2] Zhao Z., Gu J., Fan X., et al. Molecular size distribution of dissolved organic matter in water of the Pearl River and trihalomethane formation characteristics with chlorine and chlorine dioxide treatments[J]. Journal of Hazardous Materials, 2006, 134(1–3): 60-66.

[3] Gang D., Clevenger T. E., Banerji S. K. Relationship of chlorine decay and THMs formation to NOM size[J]. Journal of Hazardous Materials, 2003, 96(1–3): 1-12.

[4] Weishaar J. L., Aliken G. R., Bergamaschi B. A., et al. Evaluation of specific ultraviolet absorbance as an indicator of the chemical composition and reactivity of dissolved organic carbon[J]. Environmental Science and Technology, 2003, 37(20): 4702-4708.

[5] Kim H., Yu M. Characterization of natural organic matter in conventional water treatment process for selection of treatment processes focused on DBPs control[J]. Water Research, 2005, 39(19): 4779-4789.

[6] Rodriguez M. J., Serodes J., Roy D. Formation and fate of haloacetic acids (HAAs) within the water treatment plant[J]. Water Research, 2007, 41(18): 4222-4232.

[7] Park N., Kwon B., Sun M., et al. Application of various membranes to remove NOM typically occurring in Korea with respect to DBP, AOC and transport parameters[J]. Desalination, 2005, 178(1–3): 161-169.

[8] Reißmann F. G., Schulze E., Albrecht V. Application of a combined UF/RO system for the reuse of filter backwash water from treated swimming pool water[J]. Desalination, 2005, 178(1–3): 41-49.

[9] Chen C., Zhang X., He W., et al. Comparison of seven kinds of drinking water treatment processes to enhance organic material removal: A pilot test[J]. Science of the Total Environment, 2007, 382(1): 93-102.

[10] Zhang L., Gu P., Zhong Z., et al. Characterization of organic mater and disinfection by-products in membrane backwash water from drink water treatment[J]. Journal of Hazardous Materials, 2009, 168(2/3): 753-759.

[11] Xu B., Gao N., Sun X., et al. Characteristics of organic material in Huangpu River and treatability with the O3-BAC process[J]. Separation and Purification Technology, 2007, 57(2): 348-355.

[12] Zhang X., Minear R. A. Characterization of high molecular weight disinfection byproducts resulting from chlorination of aquatic humic substances[J]. Environmental Science & Technology, 2002, 36(19): 4033-4038.

[13] Wang X., Zhong Z., Zhang Lingling. Study on removal of organic matters from membrane backwash water by coagulation/microfiltration[J]. China Water & Wastewater, 2008, 24(15): 104-108.

[14] Iriarte-Velasco U., Álvarez-Uriarter J. I., González-Velasco J. R. Enhanced coagulation under changing alkalinity-hardness conditions and its implication on trihalomethane precursors removal and relationship with UV absorbance[J]. Separation and Purification Technology, 2007, 55(5): 368-380.

[15] Ji Q., Liu H., Hu C., et al. Removal of disinfection by-products precursors by polyaluminum chloride coagulation coupled with chlorination[J]. Separation and Purification Technology, 2008, 62(2): 464-469.

[16] Dong B., Cao D., Chen Yan. Membrane-based Drinking Water Advanced Treatment Technology[M]. 2006, Beijing: Chemical Industry Press.

[17] Chang E. E., Chiang P., Ko Y., et al. Characteristics of organic precursors and their relationship with disinfection by-products[J]. Chemosphere, 2001, 44(5): 1231-1236.

[18] Chiang P. C., Chang E. E., Liang C. H. NOM characteristics and treatabilities of ozonation processes[J]. Chemosphere, 2002, 46(6): 929-936.

[19] Roccaro P., Vagliasindi F. G. A. Differential vs. absolute UV absorbance approaches in studying NOM reactivity in DBPs formation: Comparison and applicability[J]. Water Research, 2009, 43(3): 744-750.

[20] National Risk Management Research Laboratory Office of ResearchDevelopment. Controlling Disinfection Byproducts and Microbial Contaminants in Drink Water[M]. 2001, Washington: U.S. Environmental Protection Agency.

[21] Kitis M., Karanfil T., Wigton A., et al. Probing reactivity of dissolved organic matter for disinfection by-product formation using XAD-8 resin absorption and ultrafiltration fraction[J]. Water Research, 2002, 36(15): 3834-3848.

[22] Wu Haihui. Study on Formation Characteristics and Removal Mechanism of Disinfection By-products during Prechlorination[D]. 2006, Shanghai: School of Environmental Science and Engineering, Tongji University.

[23] Teksoy A., Alkan U., Başkaya H. S., et al. Influence of the treatment process combinations on the formation of THM species in water[J]. Separation and Purification Technology, 2008, 61(3): 447-454.

[24] Hwang C, Sclimenti M, Krasner S. Characterization and reactivity of hydrophilic natural organic matter (NOM) in a low-humic acid[C]. In: Water Quality Technology Conference. Florida, 1999. 641–647.

[25] Wei Q., Feng C., Wang D., et al. Seasonal variations of chemical and physical characteristics of dissolved organic matter and trihalomethane precursors in a reservoir: A case study[J]. Journal of Hazardous Materials, 2008, 150(2): 257-264.

[26] Zularisam A. W., Ismail A. F., Salim M. R. The effects of natural organic matter (NOM) fractions on fouling characteristics and flux recovery of ultrafiltration membranes[J]. Desalination, 2007, 212(1–3): 191-208.

[27] Dong B., Feng J., Chen Yan. Effect of properties of organics on ultrafiltration membrane flux[J]. Journal of Tongji University (Natural Science), 2007, 35(3): 356-360.