NDLI: Evaluation of Adsorptive and Biological Mode Dbp Removal in Activated Carbon Filters

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Evaluation of Adsorptive and Biological Mode Dbp Removal in Activated Carbon Filters

Content Provider	Semantic Scholar
Author	Yang, Nathan
Copyright Year	2017
Abstract	Yang, Nathan T. (M.S., Environmental Engineering) Evaluation of Adsorptive and Biological DBP Removal in Activated Carbon Filters Thesis directed by R. Scott Summers, Professor, Department of Civil, Environmental, and Architectural Engineering, University of Colorado at Boulder Small drinking water systems face unique compliance challenges with regards to many water quality parameters, including disinfection-by-product (DBP) levels in the distribution system. Filtration with granular activated carbon (GAC) can be an effective technology for the removal of total organic carbon (TOC) and DBPs. The objectives of this thesis were to develop and evaluate the use of GAC in the distribution system to meet DBP regulations under both adsorptive and biological modes. It was hypothesized that a post-treatment reactor strategically located in the distribution system will offer small systems a cost-effective alternative to controlling total trihalomethanes (TTHMs), sum of five haloacetic acids (HAA5s) and other unregulated DBPs. A total of six adsorptive rapid small scale column tests (RSSCTs) and three pilot scale biofilters were operated to investigate the effects of GAC type, source water quality, temperature and empty bed contact time (EBCT) on the adsorption and biodegradation of TOC and DBPs in treated drinking water. Experimental results show that adsorption with bituminous GAC is an effective treatment strategy for the removal of TOC and TTHMs through at least 6,000 bed volumes (42 days at 10min EBCT) and often longer depending on influent conditions. Pore surface diffusion model (PSDM) analysis indicated that the presence of both natural organic matter (NOM) and co-solutes are important to consider when analyzing THM breakthrough, with THM adsorbability being the most important factor in determining
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1180&context=cven_gradetds
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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