Treatment of a colored groundwater by ozone-biofiltration: pilot studies and modeling interpretation

Rittmann, Bruce E.; Stilwell, Douglas; Garside, Jason C; Amy, Gary L.; Spangenberg, Carl; Kalinsky, Arseny; Akiyoshi, Eric

doi:10.1016/s0043-1354(02)00033-7

Cited by 28 publications

(22 citation statements)

References 19 publications

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Yan

Wang

et al. 2010

Separation and Purification Technology

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a b s t r a c tThe removal of trihalomethanes (THMs) precursor and natural organic matter (NOM) by an integrated process of ozonation and biological granular activated carbon filtration (BGAC) as a deep water treatment process was investigated in pilot-scale tests. A comparison is also made with granular activated carbon filtration (GAC). The characteristics of the THMs precursor and the THMs formation potential (THMFP) were investigated by resin adsorption and ultrafiltration. The results show that the integrated process of ozonation and BGAC (O 3 /BGAC) is obviously superior to GAC for the removal of the THMs precursor because a considerable synergetic effect occurs between the ozonation and the BGAC. Although ozonation can limitedly remove dissolved organic carbon (DOC), it can cut down the molecular weight of the NOM, change its polarity, decrease the THMFP, and obviously enhance the efficiency of the BGAC. The BGAC could efficiently remove the hydrophobic base (HoB), hydrophobic neutral (HoN), weakly hydrophobic acid (WHoA), and low molecular weight fraction DOC that was produced in the optimized ozonation process. However, the BGAC stage should be carefully controlled to avoid the leakage of microbes and/or the products of metabolism because it has a high risk for producing THMs in following chlorination process.

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Section: Introductionmentioning

confidence: 99%

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

Yan

Wang

et al. 2010

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

“…Emelko et al (2006) studied the effect of backwash and temperature on full scale biofiltration, and concluded that biodegradable organic material (BOM) removal was not influenced by backwash regimes even though some biomass expressed by phospholipid was lost during backwash with air scouring. Others also concluded that backwashing did not have noticeable impact on BOM removal because no more than 25% of biomass was washed out (Hozalski et al 1999;Rittmann et al 2002). However, microbial communities in the filters and during the operating condition shifts were not investigated in this study.…”

Section: Removal Of Natural Organic Matter (Nom)mentioning

confidence: 81%

“…Direct comparison showed that the GAC/sand filter produced better performance than the anthracite/sand filter (Rittmann et al 2002) and the GAC/Sand filter out performed anthracite/sand filter by 11% for AOC removal (Weiss et al 2003). GAC media showed better resistance to temperature at 1-3 ºC in terms of oxalate and TOC removal compared with anthracite (Emelko et al 2006).…”

Section: Removal Of Natural Organic Matter (Nom)mentioning

confidence: 98%

“…(Rittmann et al 2002) Laboratory-scale batch degradation tests 0-7.3 mg O3/mg TOC Biodegradability of four NOM sources was improved by ozonation in the range of 0-7.3 mg Study Scales Parameters Findings References O3/mg TOC. Degradation of high molecular weight organics were more influenced by ozonation Laboratory-scale biologically active sand (ES 0.5 mm) filters.…”

Section: Study Scales Parameters Findingsmentioning

confidence: 99%

“…Majority of the studies showed that an EBCT of 10 minutes should be used in process design to achieve 30-50% TOC removal with GAC. When combined with pre-ozonation, an EBCT of 5 minutes appeared sufficient Laurent et al 1999;Rittmann et al 2002;Weiss et al 2003). …”

Section: Removal Of Natural Organic Matter (Nom)mentioning

confidence: 99%

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