Impact of ozonation and biologically enhanced activated carbon filtration on the composition of micropollutants in drinking water
- 131 Downloads
A pilot-scale drinking water treatment process for Songhua River, including conventional treatment (coagulation-settlement and rapid sand filtration), ozonation, biological enhanced activated carbon (BEAC) filtration, and chlorination disinfection, was carried out in this study. To investigate the impact of ozonation and BEAC filtration on removing the composition of micropollutants in drinking water, we detected the micropollutant composition from each stage of the treatment process by non-targeted analysis using a GC-MS technique and compared the results between effluents of single BEAC and O3-BEAC processes. Aromatic compounds and esters could be abated efficiently during single BEAC filtration via biodegradation and adsorption; however, possible metabolic products (i.e., alkenes) were formed by biodegradation. Comparatively, O3-BEAC process could reduce micropollutants much more significantly than single BEAC process especially for aromatic compounds including substituted benzenes and polycyclic aromatic hydrocarbons (PAHs) without the formation of metabolic products through the coupling effect of oxidation, biodegradation, and adsorption, suggesting that ozonation improved the removal potential of micropollutants in the BEAC process. In addition, conventional and novel chlorinated disinfection by-products were also measured during post-chlorination.
KeywordsMicropollutant composition Ozonation Biological enhanced activated carbon filtration Disinfection by-products Drinking water Non-targeted analysis
The present research was carried out at State Key Laboratory of Urban Water Resource and the School of Environment, Harbin Institute of Technology.
This work was supported by the National Natural Science Foundation, China (grant number 51578178).
- Benner J, Helbling DE, Kohler HE, Wittebol J, Kaiser E, Prasse C, Ternes TA, Albers CN, Aamand J, Horemans B, Springael D, Walravens E, Boon N (2013) Is biological treatment a viable alternative for micropollutant removal in drinking water treatment processes? Water Res 47(16):5955–5976CrossRefGoogle Scholar
- Bletsou AA, Jeon J, Hollender J, Archontaki E, Thomaidis NS (2015) Targeted and non-targeted liquid chromatography-mass spectrometric workflows for identification of transformation products of emerging pollutants in the aquatic environment. TrAC Trends Anal Chem 66(Supplement C):32–44CrossRefGoogle Scholar
- Cerniglia CE (1984) Advances in applied microbiology. In: Laskin AI (ed) Academic Press, pp. 31–71Google Scholar
- Findlay RH, King GM, Watling L (1989) Efficacy of phospholipid analysis in determining microbial biomass in sediments. Appl Environ Microbiol 55(11):2888–2893Google Scholar
- Hoh E, Dodder NG, Lehotay SJ, Pangallo KC, Reddy CM, Maruya KA (2012) Nontargeted comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry method and software for inventorying persistent and bioaccumulative contaminants in marine environments. Environ Sci Technol 46(15):8001–8008CrossRefGoogle Scholar
- Mohler RE, O Reilly KT, Zemo DA, Tiwary AK, Magaw RI, Synowiec KA (2013) Non-targeted analysis of petroleum metabolites in groundwater using GC×GC-TOFMS. Environ Sci Technol 47(18):10471–10476Google Scholar
- von Sonntag C, von Gunten U (2012) Chemistry of ozone in water and wastewater treatment: from basic principles to applications. IWA publishing, LondonGoogle Scholar