Characteristics of organic material in Huangpu River and treatability with the O3-BAC process

THMs precursor removal by an integrated process of ozonation and biological granular activated carbon for typical Northern China water

“…The ozonation byproducts can be easily removed by biofiltration [5,13,43]. The NOM in the effluences of the sand-filtration, mid-ozonation, and BGAC in the pilot-scale test with Yellow River water was characterized by resin adsorption and ultrafiltration.…”

“…The fraction of HoA also increased. This may be due to leakage of microbes and/or the products of metabolism [5,6,25,44]. This could lead to dramatic changes in the polarity distribution, such as the contents of hydrophobic acid and hydrophilic electrical DOC, which obviously increased [6,44].…”

“…Some of these compounds are soluble, hardly biodegradable, and irremovable in conventional water treatment processes [2]. Ozonation followed by biological treatment is one of the promising processes to remove them from raw water [3][4][5][6].…”

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

“…For the determination of the THMFP, the chlorinated pretreatment of water samples was conducted according to methods reported by Hofmann et al [20] and Xu et al [21]. Before the THMFP was determined, sodium hypochlorite (NaClO) was added to each water sample, such that the initial weight ratio of NaClO (as Cl 2 ) to DOC of each sample was 5.0.…”

“…Therefore, some advanced post-treatment technologies or the addition of pretreatment units to the existing water treatment plants, including magnetic ion exchange [10], UV/H 2 O 2 [11,12], peroxone (H 2 O 2 /O 3 ) [13], the TiO 2 photocatalytic process [14,15], UV/H 2 O 2 -granulated activated carbon (GAC) [16], ultrafiltration and nanofiltration membranes [17], nutshell carbons filtration [18] and ozone-biological activated carbon [19,20], have been increasingly used in the treatment of drinking water prior to disinfection to enhance the DOM removal and to prevent the generation of DBPs. A treatment method employing a CTP followed by an ozonation integrated with a biologically activated carbon (O 3 -BAC) process has been reported to be effective in the removal of certain organic contaminants during drinking water treatment [21,22]. Although a significant amount of studies have been conducted on O 3 -BAC, the application of the research findings is still somewhat limited by the contradictory results obtained in the previous studies.…”