The application of powdered activated carbon for mib and geosmin removal: predicting pac doses in four raw waters

Cook, David; Newcombe, Gayle; Sztajnbok, Pascale

doi:10.1016/s0043-1354(00)00363-8

Cited by 284 publications

(175 citation statements)

References 20 publications

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“…Ozone oxidation and biodegradation by biological activated carbon have been considered to be two effective methods for mitigation of the odor problem (Newcombe et al, 1997;Geering, 1999;Cook et al, 2001;von Gunten, 2003a) The combination of ozonation and biological activated carbon (BAC) (O 3 -BAC), which integrates the oxidation effect of O 3 and the biological degradation effect of BAC, have often been adopted as an advanced water treatment approach because of its capability in comprehensively improving drinking water quality (Newcombe and Cook, 2002). Though the O 3 -BAC process has been proved to be effective in the removal of odors (Cook et al, 2001;Newcombe and Cook, 2002), most of the previous studies have mainly been limited to the earthy odorants including 2-MIB and geosmin (Srinivasan and Sorial, 2011;Antonopoulou et al, 2014). Ozonation and associated advanced oxidation processes (O 3 /H 2 O 2 , UV/O 3 , UV/O 3 /H 2 O 2 ) have been proved to be effective for the removal of 2-MIB and geosmin (Atasiet et al, 1999;Ho et al, 2002;Jung et al, 2004;Liang et al, 2007;Andreadakis et al, 2010;Mizuno et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of multiple odorants from source water suffering from septic and musty odors: Verification in a full-scale water treatment plant with ozonation

Guo

Yang

et al. 2016

Water Research

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a b s t r a c tOzonation is known to be very effective in the removal of odorants from source water. However, it is not known if ozonation is effective in the removal of multiple odorants causing different types of odors. In this study, the removal performance for odors and odorants were evaluated in a Water Treatment Plant (WTP), which was equipped with coagulation, sedimentation, ozonation, biological activated carbon (BAC) filtration, sand filtration, and chlorination in succession and located in the downstream of the Huangpu (HP) River, over the period from April, 2014 to April, 2015. Flavor profile analysis (FPA) results showed that the source water was constantly associated with septic and musty odors. Geosmin and 2-MIB, with an average OAV of 4.54 and 1.38, respectively, were the major odorants for musty odor, while bis(2-chloroisopropyl) ether, DEDS and DMDS with an average OAV of 2.35, 1.65 and 0.78, respectively, might be responsible for the septic odor. While the musty odor could be removed effectively through the combination of ozonation and BAC, the septic odor and associated odorants required further treatment with sand filtration and chlorination for complete removal. It is clear that the advanced treatment process was effective for the treatment of source water containing complicated odorants. It should be noted that the sedimentation process needs careful management because release of odorants may occur during the treatment. The result of this study will be helpful for the mitigation of odors in WTP using source waters suffering from complicated odor problems.

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Section: Introductionmentioning

confidence: 99%

Simultaneous removal of multiple odorants from source water suffering from septic and musty odors: Verification in a full-scale water treatment plant with ozonation

Guo

Yang

et al. 2016

Water Research

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“…Three strains of T. bourrellyi isolated from Lake Erhai were shown to produce both β-ionone and geosmin in the present study. Although no direct evidence demonstrated the health risks of geosmin and MIB for humans or aquatic animals (Dionigi et al 1993;Jüttner and Watson 2007), these two mustyearthy monoterpene and sesquiterpene metabolites have been regarded as the cause of frequent taste and odor incidents in water supplies, because of their strong earthy smell and extraordinarily low sensory threshold as 2-20 ng L −1 for humans (Cook et al 2001;Izaguirre and Taylor 2004). Therefore, the presence of T. bourrellyi, the geosmin producer, implied a potential off-flavor risk for water quality around Lake Erhai.…”

Section: Discussionmentioning

confidence: 99%

Dynamics and polyphasic characterization of odor-producing cyanobacterium Tychonema bourrellyi from Lake Erhai, China

Zhang

Song

Shao

et al. 2015

Environ Sci Pollut Res

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The previous studies indicated that Tychonema-like strains from Lake Erhai could release geosmin so that the species was listed as the potential harmful cyanobacteria influencing the drinking water safety around Lake Erhai. But, the dynamics and biological information of this species were too limited. In this study, the polyphasic approach was used to reveal its biological characterization and the dynamics in Lake Erhai. The characters of trichomes, including filaments with solitary or bundle state, reddish-brown or bluegreen color, planktonic habitat, and presence of keritomized content, were examined by the microscopic method. The 16S rDNA sequences of these strains were used for phylogenetic analysis and molecular identification. The strains were morphologically classified as Tychonema bourrellyi, and geosmin and β-ionone were identified as the major volatile substances using gas chromatography-mass spectrometry (GC-MS) analysis. No strains of T. bourrellyi were found to produce microcystin by the HPLC and mcy gene approaches. Cell numbers at 12 sampling sites in Lake Erhai were shown as an average of 3×10 4 cells L −1 in 2009 and 2010. The obvious peaks occurred in July and August each year. This was the first report on occurrence of T. bourrellyi from outside of Europe, and T. bourrellyi was also a newly recorded species in China. Such a result demonstrated that T. bourrellyi could distribute extending from cold waters in North Europe to the warm waters in subtropical regions. It was interesting to observe the coincidence of the occurrence of T. bourrellyi with slightly eutrophicated waters since Lake Erhai had been regarded as an early phase of eutrophicated lake.

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“…Geosmin and 2-methylisoborneol are produced during the bloom of blue-green algae as algal metabolites (Cook et al, 2001). When present in the distribution system even at a lower concentration, it results in consumer complaints (Cook et al, 2001). But manganese in the water was statistically similar at all the sampling locations.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Water Transfer from Swakoppoort and Omatako Dams on the Water Quality of Von Bach Dam, Namibia

Sirunda¹,

Mazvimavi

2013

SpringerBriefs in Environmental Science

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The application of powdered activated carbon for mib and geosmin removal: predicting pac doses in four raw waters

Cited by 284 publications

References 20 publications

Simultaneous removal of multiple odorants from source water suffering from septic and musty odors: Verification in a full-scale water treatment plant with ozonation

Simultaneous removal of multiple odorants from source water suffering from septic and musty odors: Verification in a full-scale water treatment plant with ozonation

Dynamics and polyphasic characterization of odor-producing cyanobacterium Tychonema bourrellyi from Lake Erhai, China

The Effects of Water Transfer from Swakoppoort and Omatako Dams on the Water Quality of Von Bach Dam, Namibia

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