Characterization of intracellular &amp; extracellular algae organic matters (AOM) of Microcystic aeruginosa and formation of AOM-associated disinfection byproducts and odor &amp; taste compounds

Li, Lei; Gao, Naiyun; Deng, Yang; Yao, Jiafei; Zhang, Kejia

doi:10.1016/j.watres.2011.12.026

Cited by 416 publications

(165 citation statements)

References 45 publications

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“…Organic particles including algal cells are trapped in flocs during coagulation, and then settle down in the bottom of settlers until the discharge of sludge. Algal cells trapped in sludge may rupture when the sludge residence time in the sedimentation tank was long enough (sludge was removed once a day from the sedimentation tank) or the sedimentation sludge removal was incomplete, releasing the intracellular odorants (Schmidt et al, 2002(Schmidt et al, , 2009Kommineni et al, 2009;Ho et al, 2012;Li et al, 2012aLi et al, , 2012bZamyadi et al, 2012Zamyadi et al, , 2013Zamyadi et al, , 2014Ho et al, 2013). On the other hand, anaerobic digestion could easily take place in sedimentation sludge because of the presence of algal cells and other organic materials.…”

Section: Odorant Removal In Wtpmentioning

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: Odorant Removal In Wtpmentioning

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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“…4b) The reactivity of AOM as precursors of chlorinated DBPs has been evaluated by many studies (Fang et al, 2010a(Fang et al, , 2010bLi et al, 2012;Wert and Rosario-Ortiz, 2013). The AOM released from M. aeruginosa with prolonged simulated transportation time after prechlorination can result in a dramatic increase of DBPs formed during chlorination of the dissolved phase.…”

Section: Effects Of Prechlorination and Simulated Transportation Timementioning

confidence: 99%

Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

Lan

Liu

et al. 2016

Water Research

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a b s t r a c tThe prechlorination-induced algal organic matter (AOM) released from Microcystis aeruginosa (M. aeruginosa) cells has been reported to serve as a source of precursors for chlorinated disinfection byproducts (DBPs). However, previous studies have mainly focused on the precursors either extracted directly from the cell suspension or derived immediately after algal suspension prechlorination. This study aims to investigate the impacts of water transportation time after algal suspension prechlorination on cell integrity, AOM release, and DBP formation during the dissolved phase chlorination. The damage to cell integrity after prechlorination was indicated to depend not only on chlorine dose but also on transportation time. The highest dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) values were observed at 2 mg/L chlorine preoxidation before transportation, but were obtained at 0.4 mg/L chlorine after 480-min simulated transportation. The variation of DON with transportation time was indicated to be mainly influenced by the small molecular weight nitrogenous organic compounds, such as amino acids. Additionally, formation of the corresponding chlorinated carbonaceous disinfection byproducts (C-DBPs) and nitrogenous disinfection byproducts (N-DBPs) during the dissolved phase chlorination showed the same variation tendency as DOC and DON respectively. The highest C-DBP (98.4 mg/L) and N-DBP (5.5 mg/L) values were obtained at 0.4 mg/L chlorine preoxidation after 480-min simulated transportation. Therefore, when prechlorination is applied for algae-laden water pretreatment, not only chlorine dose but also transportation time needs to be considered with regard to their effects on cell integrity, AOM release, and chlorinated DBP formation.

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“…These substances may 32 contribute taste and odour, elevate total organic carbon (TOC) levels, increase coagulant and 33 chlorine demand, cause membrane fouling and lead to an increase in potentially-harmful 34 disinfection by-products (DBPs) such as trihalomethanes (THMs) (Bernhardt et al 1991;Nguyen et 35 al. 2005; Li et al 2012). Some species of algae also produce toxic metabolites which present a public 36 health risk (Žegura et al 2011).…”

Section: Introduction 29mentioning

confidence: 99%

Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation

Gough

Holliman

Cooke

et al. 2015

Sustainability of Water Quality and Ecology

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8It is predicated that algal blooms will become an increasing problem under changing climatic 9conditions. This is particularly concerning for the potable water treatment industry since algogenic 10 organic matter (AOM) in surface waters supplying water treatment works (WTWs) can cause a 11 number of treatment issues. However, whilst previous studies have shown that AOM is distinct from 12 terrigenous, humic-dominated organic matter, limited information exists relating to changes in the 13 character of AOM during different algal growth phases. In this study, reservoir water containing 14 dissolved organic carbon (DOC) dominated by humic material was enriched with nutrient medium to 15 create an algal bloom. Over the course of the algal bloom, DOC was characterised using XAD-16 fractionation and UV absorbance measurements. In addition, the reactivity of DOC with chlorine 17 both before and after XAD-fractionation was assessed using trihalomethane formation potential 18 (THMFP) and bromine incorporation measurements to monitor whether THM yield and speciation 19 varied between different growth phases. Characterisation of DOC during the algal bloom indicated a 20 shift towards more hydrophilic, aliphatic (low specific UV absorbance; SUVA) DOC with the release of 21 extracellular organic matter (EOM) and later intracellular organic matter (IOM) during cell lysis. XAD-22 fractionation results suggest that algae produce predominantly hydrophilic neutral (HPIN) DOC. In 23 contrast to some existing research, our study shows a marked change in DOC reactivity over time 24 with a reduction in standardised THMFP (STHMFP) and the initial rate of THM formation observed as 25 the algal bloom progressed. However, bromine incorporation increased with culture age. 26

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Characterization of intracellular & extracellular algae organic matters (AOM) of Microcystic aeruginosa and formation of AOM-associated disinfection byproducts and odor & taste compounds

Cited by 416 publications

References 45 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

Prechlorination of algae-laden water: The effects of transportation time on cell integrity, algal organic matter release, and chlorinated disinfection byproduct formation

Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation

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