A comparison of the role of two blue–green algae in THM and HAA formation

Huang, Jin; Graham, Nigel; Templeton, Michael R.; Zhang, Y.; Collins, Christopher D.; Nieuwenhuijsen, Mark

doi:10.1016/j.watres.2009.04.029

Cited by 173 publications

(64 citation statements)

References 28 publications

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“…It is clear that more DBPs were formed for the lower-dosed chlorine pretreatment with prolonged transportation time. As remarkable amounts of AOM in the dissolved phase can result in increasing chlorinated DBP formation (Plummer and Edzwald, 2001;Huang et al, 2009), both the chlorine dose and transportation time need to be considered for the application of prechlorination in algae-laden water pretreatment.…”

Section: Proposed Influence Pathwaymentioning

confidence: 99%

“…The AOM released from Microcystis aeruginosa (M. aeruginosa) cells has been reported to serve as a source of precursors for disinfection byproducts (DBPs), not only carbonaceous disinfection byproducts (C-DBPs) such as trihalomethanes (THMs), halogen acetaldehyde (HAs), haloketone (HKs), and haloacetic acids (HAAs), but also nitrogenous disinfection byproducts (N-DBPs) such as haloacetonitriles (HANs), haloacetamides (HAcAms), and halogenated nitromethane (HNMs) (Plummer and Edzwald, 2001;Huang et al, 2009;Zhou et al, 2014aZhou et al, , 2015Zhu et al, 2015). The formation potential of various C-DBPs and N-DBPs has been studied in detail for the chlorination of AOM extracted from algal cells (Lui et al, 2011;Yang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Proposed Influence Pathwaymentioning

confidence: 99%

Section: Introductionmentioning

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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“…Water quality deterioration sometimes occurs due to the penetration of algae cells and the release of odor and taste substances and toxins (Westerhoff et al, 2005;Wert et al, 2014). The algal organic matter (AOM) also serves as precursors to promote formation of disinfection by-products (DBPs) during disinfection (Huang et al, 2009;Fang et al, 2010;Lui et al, 2011;Wei et al, 2011;Zhou et al, 2014a). Additionally, in cases of algae bloom, significantly inhibited treatment is observed due to factors such as poor coagulation and sedimentation efficiency and a significantly shortened filtration cycle (Henderson et al, 2008(Henderson et al, , 2010Takaara et al, 2010;Sano et al, 2011;Qu et al, 2012).…”

mentioning

confidence: 99%

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Lan

Miao

et al. 2016

Water Research

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a b s t r a c tKMnO 4 eFe(II) pretreatment was proposed to enhance Microcystis aeruginosa (M. aeruginosa) removal by aluminum (Al) coagulation in drinking water treatment plants (DWTPs) in our previous study. This study aims to optimize this process and evaluate the feasibility of using the process at water sources, which are usually far away from DWTPs. The optimum molar ratio of KMnO 4 to Fe(II) ½R KMnO4:FeðIIÞ is observed to be 1:3 with respect to algae removal and residual manganese (Mn) control. As indicated from flow cytometer analysis, KMnO 4 at <20 mM promisingly maintains cell integrity, with damaged cell ratios of below 10%. KMnO 4 at 30 and 60 mM damages M. aeruginosa cells more significantly and the damaged cell ratios increase to 21% and 34% after 480 min. The intracellular organic matter (IOM) release can be controlled by the subsequent introduction of Fe(II) to quench residual KMnO 4 . KMnO 4 eFe(II) pretreatment at the KMnO 4 dose of 10 mM dramatically enhances the algae removal by over 70% compared to that by Al coagulation, even if KMnO 4 and Fe(II) are introduced 480 min prior to the addition of Al 2 (SO 4 ) 3 . The Al doses can be reduced by more than half to achieve the same algae removal. Furthermore, the deposition of the tiny FeeMn precipitates formed rarely occurs, as indicated by a settleability evaluation prior to Al addition. The KMnO 4 eFe(II) process can be sequentially dosed at intake points in water sources to achieve moderate inactivation of algae cells and to enhance algae removal in DWTPs thereafter.

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“…Algal organic matter (AOM) interferes with the water treatment process, which includes a reduction in the coagulation efficiency resulting in increased coagulant demand (Bernhardt et al 1985;Takaara et al 2007;Ma et al 2012), membrane fouling (Campinas and Rosa 2010), higher production of hazardous disinfection by-products (Huang et al 2009;Fang et al 2010) and disagreeable odour and taste compounds (Li et al 2012). Cyanobacteria, usually a prevailing component of algal blooms, also produce many toxins (Harada 2004).…”

Section: Introductionmentioning

confidence: 99%

Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

Novotná

Barešová

Čermáková

et al. 2016

European Journal of Environmental Sciences

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Coagulation of peptides and proteins produced by the cyanobacterium Microcystis aeruginosa and their influence on the coagulation of hydrophobic kaolinite particles were investigated. For this purpose, the dose of ferric sulphate used as the coagulant was optimized and jar tests with kaolinite, peptides/proteins and both kaolinite and peptides/proteins were carried out under different pH conditions. At pH 4-5.5, the peptides/proteins were efficiently coagulated and peptides/proteins were also found to contribute to the coagulation of kaolinite particles at this pH. Charge neutralization and adsorption were found to be the dominant coagulation mechanisms. The coagulation efficiency and the character of the prevailing coagulation mechanism were strongly dependent on the charge characteristics of the peptides/proteins, kaolinite and hydrolysis products of iron, thus on the pH value. At a pH of about 6, the coagulation process deteriorated due to the formation of soluble Fe-peptide/protein complexes.

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A comparison of the role of two blue–green algae in THM and HAA formation

Cited by 173 publications

References 28 publications

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

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

KMnO 4 –Fe(II) pretreatment to enhance Microcystis aeruginosa removal by aluminum coagulation: Does it work after long distance transportation?

Effect of cyanobacterial peptides and proteins on coagulation of kaolinite

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