Effects of pre-ozonation and selected advanced water treatment processes on Mount Seymour impoundment water

Bonneville, C.; Smith, Daniel

doi:10.2166/ws.2001.0024

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…This finding is consistent with the findings from previous studies (Edwards et al, 1993;Jekel, 1991;Liu et al, 2009). Since the high molecular weight fractions are degraded and compounds of higher polarity are formed by ozonation, the resulting organic matter is less adsorbable on mineral particles such as silicon dioxide and kaolinite (Bonneville and Smith, 2001;Farvardin and Collins, 1989;Jekel, 1991). Consequently, steric or electrostatic stabilizing effects of organic compounds on particles are reduced or eliminated, which was demonstrated by the neutralization of the zeta potential of particles (Jekel, 1994).…”

Section: The Impact Of Ozonation On the Water Chemistry Of Mft Suspensupporting

confidence: 91%

“…According to the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, a weakening of surface charge would weaken electrostatic repulsive forces among the particles and enhance particle aggregation (Hidalgo Alvarez et al, 1996). The reduction of surface charge by ozonation has been well documented in previous studies (Liu et al, 2007;Yukselen et al, 2006) and is probably due to the desorption of organic coating on the surface of MFT fine particles (Bonneville and Smith, 2001;Farvardin and Collins, 1989;Jekel, 1991), as discussed in the previous section.…”

Section: The Influence Of Ozonation On Mft Surface Chargementioning

confidence: 75%

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Impact of ozonation on particle aggregation in mature fine tailings

Liang¹,

Tumpa²,

Estrada³

et al. 2014

Journal of Environmental Management

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Section: The Impact Of Ozonation On the Water Chemistry Of Mft Suspensupporting

confidence: 91%

Section: The Influence Of Ozonation On Mft Surface Chargementioning

confidence: 75%

Impact of ozonation on particle aggregation in mature fine tailings

Liang¹,

Tumpa²,

Estrada³

et al. 2014

Journal of Environmental Management

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“…The main factors affecting ozone–particle interactions are applied ozone dose, water composition, and particle characteristics as size and adsorbed organic matter. Studies have shown that ozone can destabilize and aggregate smaller particles into larger ones, while breaking down large particles into smaller ones .…”

Section: Introductionmentioning

confidence: 99%

Influence of Wastewater Particles on Ozone Degradation of Trace Organic Contaminants

Zucker

Lester

Avisar

et al. 2014

Environ. Sci. Technol.

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In this Article, we demonstrate the influence of effluent particles (in the range of <50 μm) on ozone degradation of trace organic contaminants (TrOCs) and effluent-quality parameters. Secondary effluent was filtered through different pore-size filters and ozonated at various ozone doses. Degradation of both ozone-reactive and ozone-refractory contaminants improved following ozonation of effluent filtered with smaller pore size filters, indicating that particles in this range may adversely affect ozonation. The inhibitory effect of particles was attributed to their reaction with ozone, reducing available ozone and HO(•) radicals. In addition, increasing filtration level decreased the effluent's (instantaneous) ozone demand and increased removal of effluent UV absorbance (UVA254), further establishing that ozone reacts with effluent particles, in competition with dissolved matter. Moreover, ozone was shown to react with particles even during the first seconds of the process, suggesting a high rate of some ozone-particle reactions, comparable to ozone reaction with highly reactive dissolved organic matter moieties. Particle image analysis revealed that particle formation/aggregation and particle disintegration occurs simultaneously during wastewater (WW) ozonation. Our study implies that particles could affect the efficiency of WW ozonation, by increasing the effluent's ozone demand and decreasing contaminant degradation.

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Ozone-enhanced electroflocculation in municipal wastewater treatment

Nielson¹,

Smith²

2005

Journal of Environmental Engineering and Science

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The use of electrochemical principles for the treatment of wastewaters has received increased attention in recent years. This paper examines one such technology termed the ElectroflocPLUS wastewater treatment system developed by Applied Oxidation Technologies Inc. of Ladysmith, British Columbia. The study investigated the ability of the system to treat municipal wastewater. The results of an extensive experimental program showed that the technology was effective in the reduction of certain water quality parameters, including total suspended solids (TSS) and total phosphorus (TP), and the unit was capable of meeting regulatory guidelines for these parameters. The removals of chemical oxygen demand (COD) and 5-d biochemical oxygen demand (BOD5) were inadequate, as the test unit was unable to treat the wastewater adequately to meet regulatory guidelines. Other points were also examined, including the ElectroflocPLUS treatment systems energy requirements. The results showed energy consumption to be quite high relative to competing technologies. Key words: electroflocculation, electrocoagulation, municipal wastewater treatment, ozone, microorganism reduction, coagulation, flotation.

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Effects of pre-ozonation and selected advanced water treatment processes on Mount Seymour impoundment water

Abstract: significant is ozone's benefit for the reduction of W-absorbing organic matter. The study also found that DAF is very effective at removing turbidity causing particles and colour fiom the water, thereby irnprovîng fil ter performance.

Cited by 4 publications

References 12 publications

Impact of ozonation on particle aggregation in mature fine tailings

Impact of ozonation on particle aggregation in mature fine tailings

Influence of Wastewater Particles on Ozone Degradation of Trace Organic Contaminants

Ozone-enhanced electroflocculation in municipal wastewater treatment

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