Improvement of DOC removal by multi-stage AOP-biological treatment

Fahmi, Muhammad Ridwan; Nishijima, Wataru; Okada, Minoru

doi:10.1016/s0045-6535(02)00617-3

Cited by 41 publications

(23 citation statements)

References 10 publications

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“…Traditionally the concentrations of BDOC analysed with dynamic method in glass column system with attached biofilm were calculated as the difference in concentration of DOC between the inlet water sample in column system and the effluent water sample with lowest concentration of DOC, namely DOC BAC and DOC min (Fig. 3) based on the definitions developed by other researchers (Fahmi et al, 2003;Hammes and Vital, 2008;Volk et al, 1993;Ribas et al, 1991 andYavich et al, 2004) and in this study called BDOC BAC . The total concentration of BDOC (namely BDOC total ) which accounts for both parts -quantity of biodegradable part in sample (DOC BAC ) and LOC (DOC LOC ) was not considered in this paper since it was not comparable with measurements of BDOC in WTP.…”

Section: Resultsmentioning

confidence: 99%

“…During ozonation dissolved organic carbon (DOC) is transformed to biodegradable organic carbon (BDOC), which then is metabolized by bacteria in the biofilter (Fahmi et al, 2003;Hammes and Vital, 2008;Volk et al, 1993). The amount of BDOC fraction depends on the type of natural organic matter (NOM) present in the water (Huck, 1990;Kaplan et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Effect of biostimulation on biodegradation of dissolved organic carbon in biological filters

Tihomirova

Briedis

Rubulis

et al. 2012

Drink. Water Eng. Sci.

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Abstract. The addition of labile organic carbon (LOC) to enhance the biodegradation rate of dissolved organic carbon (DOC) in biological columns was studied. Acetate standard solution (NaAc) and Luria Bertrani (LB) medium were used as LOC as biostimulants in glass column system used for measurements of biodegradable dissolved organic carbon (BDOC). The addition of LOC related with the increase of total DOC in sample. The concentration of BDOC increased up to 7 and 5 times and was utilized after 24 min. contact time. The biodegradation rate constant was increased at least 26 times during adaptation-biostimulation period. There was a strong positive correlation between the biodegradation rate constant and the concentration of BDOC. Biostimulation period ranged from 24 to 53 h for NaAc biostimulant and from 20 to 168 h for LB. The study has shown that LOC could be used as stimulator to enhance the biodegradation rate of DOC during biofiltration.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of biostimulation on biodegradation of dissolved organic carbon in biological filters

Tihomirova

Briedis

Rubulis

et al. 2012

Drink. Water Eng. Sci.

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“…The combination is advantageous as full mineralisation of DOC by ozone would be exceedingly expensive, but just converting refractory DOC to BDOC which can be removed by a much cheaper BAC process presents a significant advantage in comparison with employing processes separately. This principle was utilised by repeating the ozonation and BAC treatment [39]. DOC removal of 95% was achieved by repeating the process ten times (O 3 + BAC).…”

Section: Ozone/bacmentioning

confidence: 99%

A selection framework for NOM removal process for drinking water treatment

Kastl

Sathasivan

Fisher³

2015

Desalination and Water Treatment

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A B S T R A C TNOM (natural organic matter) is increasing in water resources worldwide and is becoming more difficult to treat. Drinking water guidelines are becoming more stringent so NOM removal is becoming more critical and requires consideration as a major treatment process, rather than just a polishing step on top of turbidity removal. In this study, a review of available methodologies to determine the required degree of NOM removal was undertaken. It is demonstrated that chlorine decay and THM (trihalomethane) formation modelling of laboratory-treated water samples provides a sound guide to determine the level of NOM removal needed for a given situation. The level of NOM removal needed is linked to a specific distribution system at given water temperature and water age profile. A sample of raw water treated by a given NOM removal process is tested for chlorine decay rates and THM formation kinetics, and these results are used to evaluate the performance of a distribution system with a given configuration. Frequently used and proven processes for NOM removal are: enhanced coagulation, granulated activated carbon, ozone with biological activated carbon and ion exchange resins. The impact of any of these processes can be predicted by the proposed methodology. General guidelines for process selection are presented.

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“…This effect was due to Å OH radicals degrading most organic compounds present in polluted water (Ghaly et al, 2001). Larger molecules of dissolve organic matter were oxidized to smaller intermediate molecules (Fahmi et al, 2003;Scheck and Frimmel, 1995).…”

Section: Water Qualitiesmentioning

confidence: 99%