Effect of type of granular activated carbon on DOC biodegradation in biological activated carbon filters

Yapsakli, Kozet; Çeçen, Ferhan

doi:10.1016/j.procbio.2009.10.005

Cited by 99 publications

(37 citation statements)

References 39 publications

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“…The introduction of the O 3 -BAC process significantly enhanced the DOM removal, and this finding was in agreement with previous studies [19,34,35]. …”

Section: Overall Doc Removalsupporting

confidence: 93%

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

Zhu

Lü

2013

Water

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Abstract:The aim of this study is to determine the impact upon dissolved organic matter (DOM) and removal of disinfection by-product (DBP) precursors of adding an ozone-biological activated carbon (O 3 -BAC) process after the conventional treatment process (CTP) using water from the Huangpu River in Shanghai, east China. Several metrics, including size fractionation, dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP), were employed to accomplish this goal. In the raw water collected from the Huangpu River, the low molecular weight (MW) molecules (MW <3 kDa) were absolutely dominant in DOM, accounting for more than 55% of total DOC, and the DOM resulted in a high THMFP level of 472.91 ± 4.63 µg/L after an excessive chlorination. The CTP reduced high MW molecules (MW >10 kDa) by 61% and the low MW molecules (MW <3 kDa) by only 8%. The O 3 -BAC presented an accumulated DOC removal efficiency of approximately 50%, in particular, showing a high degree of the removal effectiveness of low MW molecules. Samplings from the CTP, ozone and BAC were subjected to excessive chlorination to determine the THMFP, and the measured concentrations were 211.89 ± 4.58 µg/L, 169.52 ± 4.55 µg/L, and 124.42 ± 4.27 µg/L, respectively. Therefore, coupled with the THMFP removal rate of 74%, the addition of the O 3 -BAC process after an existing CTP improved the water quality of the effluent, particularly, in terms of the improved reduction in the precursors of DBPs.

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“…The introduction of the O 3 -BAC process significantly enhanced the DOM removal, and this finding was in agreement with previous studies [19,34,35]. …”

Section: Overall Doc Removalsupporting

confidence: 93%

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

Zhu

Lü

2013

Water

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“…BAC filters are important for their capacity to biodegrade undesirable compounds. In addition, the combination of ozonation with BAC filtration has proven to be an efficient method in reduction in BDOC (Yapsakli and Cecen 2010). However, biomass developed in biofilters might be a source of bacterial contamination in DWDS (Niemi et al 2009;Liao et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Bacterial community change through drinking water treatment processes

Liao

Chen

Wang

et al. 2014

Int. J. Environ. Sci. Technol.

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The microbiological quality of drinking water has aroused increasing attention due to potential public health risks. Knowledge of the bacterial ecology in the effluents of drinking water treatment units will be of practical importance. However, the bacterial community in the effluents of drinking water filters remains poorly understood. The changes of the density of viable heterotrophic bacteria and bacterial populations through a pilot-scale drinking water treatment process were investigated using heterotrophic plate counts and clone library analysis, respectively. The pilot-scale treatment process was composed of preozonation, rapid mixing, flocculation, sedimentation, sand filtration postozonation, and biological activated carbon (BAC) filtration. The results indicated that heterotrophic plate counts decreased dramatically through the drinking water treatment processes. Clone library analysis indicated the significant change of bacterial community structure through the water treatment processes. Betaproteobacteria was dominant in raw water, the sand filter effluent and the BAC filter effluent. This work could provide some new insights on drinking water microbial ecology.

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“…It should also be noted that the pore size range of ACC is much wider than that of GAC typically in the range of 0.7-2 nm (Gibert et al 2013a, b). In general, almost all bacteria are larger than 200 nm in size; hence, they cannot penetrate into GAC micropores (Yapsakli and Cecen 2010). In fact, such a highly porous structure of ACC with reasonable pore size distribution favors adsorption of organic matters, while providing large surface area for microorganisms to adhere on (Schwartz et al 2009).…”

Section: Characterization Of Accmentioning

confidence: 99%

“…The successful key of biofiltration process is replacing quartz sand of conventional filter such as V-type filter to biological filter media and providing an excellent environment for the growth of biofilm . Granular activated carbon (GAC) as one of the most widely used biological filter media has high sorption capacity to remove pollutants because of GAC's porous structure and high specific surface area (Yapsakli and Cecen 2010). But potential loss risk during backwashing process because of GAC's specific density much lighter compared with mineral filter media and its high cost restrict the all or part replacement of the quartz sand filter to achieve well biofiltration function (Kennedy et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Development of attapulgite composite ceramsite/quartz sand double-layer biofilter for micropolluted drinking source water purification

Wang

Zhong

Wan

et al. 2016

Int. J. Environ. Sci. Technol.

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This study compared start-up and steady-state affecting factors of attapulgite composite ceramsite/quartz sand double-layer biofilter (ACC/QSDLBF) and quartz sand single-layer biofilter (QSSLBF) on micropolluted drinking source water treatment. Results showed that the ACC has suitable pore size distribution in the range of 5-850 nm which is conducive to biofiltration. Turbidity removal efficiency of ACC/QSDLBF was a little lower than QSSLBF, but organic matters and ammonia removal efficiencies of ACC/QSDLBF were much higher than QSSLBF due to biodegradation and nitrification by microorganisms colonizing on the ACC. At stable state, the growth of head loss for ACC/QSDLBF was lower than that of QSSLBF. The complete filtration cycle of ACC/ QSDLBF was 52 h. The total COD Mn removal rate of ACC/QSDLBF was 20.93 %, in which 90 % of removed total COD Mn was achieved at the upper 60 cm of ACC filter layer. The removal of COD Mn decreased from 35.89 to 13.16 % in ACC/QSDLBF when increasing hydraulic loading from 2 to 16 m/h. After analysis of efficient EBCT in ACC/QSDLBF, optimized hydraulic loading was 12 m/ h. These conclusions would be helpful to practical application of ACC as functional material for new construction of waterworks, especially upgrading of existing waterworks treating micropolluted drinking source water.

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Effect of type of granular activated carbon on DOC biodegradation in biological activated carbon filters

Cited by 99 publications

References 39 publications

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

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

Bacterial community change through drinking water treatment processes

Development of attapulgite composite ceramsite/quartz sand double-layer biofilter for micropolluted drinking source water purification

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