Dissolved oxygen distribution and O2 ... - rd.springer.com

Jan 31, 2013· The horizontal distribution of O 2 fluxes across the sea-air interface appeared lumpy in Leg 9410, when most regions covered were unsaturated with O 2 ·O 2 was dissolved from air to seawater, and the fluxes were 0.819 L/m 2 ·d on section No. 1 in Leg 9310, 0.219 L/m 2 ·d in Leg 9410.

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Atmosphere of Earth - Wikipedia

The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature ...

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Estimation of air concentration in dissolved air flotation ...

The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank or basin. The increased dissolved air concentration in water at elevated pressure is the fundamental principle that allows the formation of microbubbles.

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Molecular recognition of a dissolved ... - rd.springer.com

Siegel S., Kindermann M., Regenbrecht M., Vollhardt D., von Kiedrowski G. (2000) Molecular recognition of a dissolved carboxylate by amidinium monolayers at the air-water interface. In: Buckin V. (eds) Trends in Colloid and Interface Science XIV. Progress in Colloid and Polymer Science, vol 115. Springer, Berlin, Heidelberg. First Online 12 May ...

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Effect of dissolved air content on ... - rd.springer.com

This phenomenon termed as single bubble sonoluminescence has shown some extraordinary physical properties. In the present investigation we have shown that dissolved air content has a significant influence on this phenomenon.

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Stickies Control | Springer for Research & Development

Stickies can cause runnability and quality problems, and their variable nature makes them difficult to control. Several methods have been proposed for controlling stickies. Chemical methods involve dispersants, polymers and absorbents. Mechanical methods use screens, cleaners, dissolved air flotation, and washing stages.

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Continuous Deaeration of Spinning ... - rd.springer.com

Abstract. The possibility of removing dispersed and partially dissolved air to a degree of saturation of 0.8 from spinning solutions of polyacrylonitrile in dimethylacetamide by deaeration under a 60 mm Hg vacuum for 1 min at 20-40°C was demonstrated experimentally.

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Pretreatment considerations for dissolved air flotation ...

Dissolved air flotation 69 Experiments were also performed with ferric chloride alone at 20 mg/I. Figure 5 shows that both coagulation strategies produce good flotation performance for turbidity. Good residual turbidities are achieved at a flocculation time of 5 min with little or no improvement in increasing the flocculation time to 16 min.

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Chemical transfer of dissolved organic matter from surface ...

We investigated the sea-to-air transfer of dissolved organic carbon (DOC) via cruise measurements of both ambient aerosols and SSW in the Oyashio and its coastal regions, the western subarctic ...

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Feasibility of bubble surface modification for natural ...

A novel, functionalized bubble surface can be obtained in dissolved air flotation (DAF) by dosing chemicals in the saturator. In this study, different cationic chemicals were used as bubble surface modifiers, and their effects on natural organic matter (NOM) removal from river water were investigated. NOM in the samples was fractionated based on molecular weight and hydrophobicity.

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Use of dissolved air flotation in potable water treatment ...

The basic concepts of treating humic waters with dissolved air flotation are discussed emphasizing the important role of zeta potential in the forming of floc-air-bubble-agglomerates. Then practical experiences from Finnish drinking water treatment plants are presented.

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Structure of the nanobubble clusters of dissolved air in ...

As was shown in this study, if we deal with a bubble with the initial radius of 10 − 3 cm, located in water saturated with dissolved air, the lifetime of that bubble does not exceed 10 s. This time drastically falls upon decreasing the radius of the bubble.

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O MEASUREMENT GUIDE 2 - craft-sensors.s3.amazonaws.com

Dissolved Oxygen Measurement Theory and Practice by Erich K. Springer 1. Introduction Oxygen is the most important gas for plant and animal life on our planet earth. Without oxygen, there is no life on land or in water. As oxygen is easily soluble in water it makes life in rivers, lakes and oceans possible.

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Dissolved Air Flotation: Pretreatment and Comparisons to ...

Dissolved air flotation (DAF) performance improved slightly with increasing flocculation mixing intensity. DAF performed better than settling for aquatic humic or algae type supplies especially with lower flocculation times, and performed better for a river water with turbidity under cold water conditions.

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Evaluating the Variation of Dissolved ... - rd.springer.com

Acknowledgements. The authors express their thank to the German Research Foundation DFG (GRK 2032) for funding project of Dr. Basem Aljoumani as part of the research training group “Urban Water Interfaces” as well as the Federal Highway Research Institute (BASt) and Dr. Moritz Werkenthin for providing us with data of the research project (FE 05.0160/2010/MGB).

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Failure Analysis of a Dissolved Air Flotation Treatment ...

Environmental pollution in Nigeria presents an urgent need to assess wastewater treatment facilities in various industries. This article presents an assessment of dissolved air flotation (DAF) operation in a dairy industry. The industry was visited, wastewater treatment facilities were assessed ...

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Dissolved Air Flotation | SpringerLink

In particular, dissolved air flotation is gradually replacing conventional sedimentation processes for clarification. Recently, new sequencing batch reactors (SBR) involving the use of dissolved air flotation (DAF) instead of sedimentation have been developed (133, 151, 152, 153). The new SBR-DAF can be either a biological process or a ...

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Effect of Dissolved Air on the Viscosity of Water | Nature

We have now made some very accurate measurements to determine the effect of dissolved air, and found it to be insignificant for present standards requirements. Effect of Dissolved Air on the ...

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Nutrients: Phosphorus, Nitrogen Sources, Impact on Water ...

dissolved or particulate forms, such as tissues of living and dead organisms. Nitrate, a compound containing nitrogen, can exist in the atmosphere or as a dissolved gas in water, and at elevated levels can have harmful effects on humans and animals. Nitrates in water can cause severe illness in infants and domestic animals.

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(PDF) Comparing dissolved air flotation and conventional ...

Comparing dissolved air flotation and conventional sedimentation to remove cyanobacterial cells of Microcystis aeruginosaPart II. The effect of water background organics. ... Concepts for dissolved-air flotation treatment Wastewater Treatment, Springer-Verlag, Berlin, 1990, pp. 341–359.

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Air Stripping - Springer - MAFIADOC.COM

Because only the dissolved gas can be removed from solution, it is important to raise the pH to a value of 11 or higher so that at least 95% of the ammonia nitrogen is converted to the gas form. In full-scale operation, lime is usually the most economical, and thus is the most commonly used material for raising the pH. ... combustion in air ...

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(PDF) Dissolved air flotation of bioreactor effluent using ...

This paper gives a brief description of the development of dissolved air flotation DAF (or so-called high pressure flotation) as an unit operation for removal of solids in water and wastewater ...

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(PDF) The influence of floc size and hydraulic detention ...

PDF | The influence of floc size and hydraulic detention time on the performance of a dissolved air flotation (DAF) pilot unit was investigated in the light of a known mathematical model. The ...

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(PDF) An integrated approach to dissolved air flotation

An integrated approach to dissolved air flotation. ... The Integrated Approach To Dissolved Air Flotation . ... Springer-Verlag , New York, (1990). 11 .

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Aluminum Chloride for Industrial Waterwaste Treatment

Aluminum Chloride Aluminum chloride is the coagulant of choice for many industrial and sanitary wastewater treatment applications, due to its high efficiency, effectiveness in clarification, and utility as a sludge dewatering agent. The chemical leaves no residual color and offers … Continue reading →

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The Development and Application of ... - rd.springer.com

The device adopts the following techniques: dissolved air flotation without dosing, microbial oil removal, shallow layer medium filtration, and ultraviolet sterilization. ... Lin J. (eds) Proceedings of the International Field Exploration and Development Conference 2017. Springer Series in Geomechanics and Geoengineering. Springer, Singapore ...

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Algae Removal by Flotation | Springer for Research ...

However, at high concentrations, called blooms, they can contribute tastes and odors, and even toxins to the surrounding water. They are best removed before they reach a water treatment plant (WTP) where they may rupture and release their taste and odor oils. Algae at both low and high concentrations may be removed by dissolved air flotation (DAF).

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Flotation Technology - Volume 12 | Lawrence K. Wang - Springer

Volume 12: Flotation Technology, provides information on some of the most innovative and ground-breaking advances in the field today from a panel of esteemed experts. Coverage of the principles of air flotation technology and the fundamentals of water and wastewater flotation and lake restoration.

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Compilation of Hydrologic Data for White Sands Pupfish ...

Springer, 1999). A cooperative agreement among White Sands Missile Range, Holloman Air Force Base, New Mexico Department of Game and Fish, U.S. Fish and Wildlife Service, and White Sands National Monument was signed in 1994 (Pittenger and Springer, 1996) to establish an interagency team to develop and implement conservation measures for the

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Dissolved organic carbon in summer ... - rd.springer.com

Dissolved organic carbon (DOC) is an important organic pollutant in the air-water carbon cycle system, potentially influencing the global climate. In this study, 204 rainwater samples from five sampling stations in the Mt. Yulong region were synchronously collected from June to September in 2014.

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Impact of seasonal climate change on optical and molecular ...

Nov 28, 2014· The change in the optical parameters of dissolved organic matter (DOM) from natural water samples of Pirita River in Estonia were studied during 2 years of winter–spring season. At present, the relative quantitative and qualitative composition of DOM components leached from soils to water, in relation to air and water temperatures and water level fluctuations, has not been estimated in Estonia.

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Effect of Dissolved Air on the Density and Refractive ...

Effect of Dissolved Air on the Density and Refractive Index of Water A. H. Harvey,1,2 S. G. Kaplan,3 and J. H. Burnett4 Received June 28, 2005 The effect of dissolved air on the density and the refractive index of liquid water is studied from 0 to 50 C. The density effect is calculated from the

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Dissolved air flotation in potable water treatment: The ...

Dissolved air flotation in potable water treatment: The Dutch experience This paper is dedicated to the memory of Jan van Puffelen, whose knowledge of and devotion to potable water treatment …

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