particle size distribution Articles - page 4

`Cyclone optimization including particle clustering` New scientific article on Powder Technology

Abstract In this work, a new family of geometries of reverse-flow cyclones was obtained through numerical optimization, using a stochastic random search global optimizer coupled with the PACyc model. The objective was to optimize the geometry of a reverse-flow cyclone taking into account inter-particle agglomeration (clustering), since this phenomenon usually occurs to some degree in ...

Dec. 10, 2014

By Advanced Cyclone Systems, S. A.

The Many Uses of Activated Carbon

Activated carbon is processed to have small, low-volume pores that increase the surface area available for adsorption. It has applications in the medical, environmental and energy realms, among others. Since 1962, ASTM Committee D28 on Activated Carbon has developed standards that play a pre-eminent role in how activated carbon is used. A D28 subcommittee, D28.02 on Liquid Phase Evaluation, is ...

Dec. 22, 2014

By ASTM International

Characterization of Polymer Carbon Sieves, Graphitized Polymer Carbons and Graphitized Carbon Blacks for Sample Preparation Applications

The use of carbons in sample preparation techniques such as solid phase extraction (SPE) and air sampling has been ongoing for several decades. Recent advancements in sample preparation techniques have led to the use of carbons in micro-SPE (i.e., pipette tips packed with particles), solid phase microextraction (SPME) techniques and carbon coatings for both gas and liquid sample preparation ...

Jul. 9, 2010

By MilliporeSigma

$Laser Diffraction$

Laser Diffraction

Particle size measurement using static light scattering The particle size distribution laser diffraction as a parameter to specify a powder or dispersion plays a central role in many applications. Examples are construction material (sands, cements), pharmaceutical development, lime stones, ceramics, colored pigments, fertilizers, emulsions and may more. The range of applications is increasing ...

Oct. 27, 2019

By Dandong Bettersize Instruments Ltd.

Integrating activated sludge floc size information in MBR fouling modeling

Although studied extensively, modeling fouling phenomena in membrane bioreactors (MBRs) remains challenging. It has been well established that cake layer formation and pore blocking have a strong impact on the filtration performance but how to capture that in comprehensive models is not fully defined yet. Since it has been shown that bioflocculation characteristics of activated sludge have a ...

Apr. 13, 2015

By IWA Publishing

$Laser Diffraction$

Laser Diffraction

Particle size measurement using static light scattering The particle size distribution as a parameter to specify a powder or dispersion plays a central role in many applications. Examples are construction material (sands, cements), pharmaceutical development, lime stones, ceramics, colored pigments, fertilizers, emulsions and may more. The range of applications is increasing permanently and hence ...

Aug. 10, 2019

By Dandong Bettersize Instruments Ltd.

Particle retention in compact constructed wetlands treating highway stormwater

Three pilot-scale compact constructed wetland systems were constructed to treat stormwater from a highway. They each comprised a sedimentation tank, and a vertical flow (VF) wetland bed equipped with a recirculation device. The VF wetland beds were filled with woodchip, pumice and volcanic gravel, respectively. According to the analysis of the particle size distributions (0.52–500 ...

Apr. 10, 2014

By IWA Publishing

The impact of chlorine disinfection on biochemical oxygen demand levels in chemically enhanced primary treatment effluent

The response trends of biochemical oxygen demand (BOD) and organic strength after the chlorination/dechlorination process were explored through a 2-year, 5-month chemically enhanced primary treatment (CEPT) effluent onsite monitoring program and a 2-month laboratory-scale study. The monitoring results showed that better instantaneous mixing at the chlorine injection point reduced the effect of ...

Jul. 19, 2013

By IWA Publishing

Dye wastewater treatment by using ceramic membrane bioreactor

Performance of a Micro-filtration Membrane Bioreactor (MMBR) for treatment of dye wastewater was investigated. The experimental results indicated that the removal efficiency for COD, TOC and colour was 85%, 85-90% and 70%, respectively, the effluent COD was below 70 mgl−1 on average. Gel layer resistance of COD was 10%. Particle size distribution of sludge in MMBR was 1-150 μm, and the average ...

Jul. 20, 2009

By Inderscience Publishers

Preliminary stabilisation of stormwater biofilters and loss of filter material

Stabilisation affects performance of stormwater biofilters operating under intermittent wetting and drying, mainly due to wash-off of filter material. Understanding the dynamics of solids wash-off is crucial in designing stormwater biofilters. The current study analysed the dynamics of solids wash-off in stormwater biofilters and quantified the loss of solids from the filter. Four Perspex™ ...

Jun. 1, 2016

By IWA Publishing

An overview of micron-ranged particle sizing techniques

Given the wide range of particle sizing technologies and instrumentation on the market, the choice of measurement technique can be daunting, especially if one is unfamiliar with the options available. Once introduced and familiar with an individual technique, it can be easy to continue to choose it by default. While this is certainly understandable, it may prove a disservice when the technique is ...

Jul. 2, 2013

By Particle Technology Labs

Characterization of chemical polishing materials (monomodal and bimodal) by means of acoustic spectroscopy

It is shown that acoustic spectroscopy can sense the presence of a small sub-population of large particles in a concentrated dispersion of much smaller particles. The detection limit can be as low as a single one micron particle per 100 000 particles of 100 nm size. In order to achieve this high sensitivity the acoustic spectrometer must be able to measure ultrasound attenuation with a precision ...

Nov. 1, 1999

By Dispersion Technology Inc.

$Laser Diffraction$

Laser Diffraction

Particle size measurement using static light scattering The particle size distribution as a parameter to specify a powder or dispersion plays a central role in many applications. Examples are construction material (sands, cements), pharmaceutical development, lime stones, ceramics, colored pigments, fertilizers, emulsions and may more. The range of applications is increasing permanently and hence ...

Nov. 19, 2019

By Dandong Bettersize Instruments Ltd.

Energy recovery from the Exhaust gases of a Cyclone preheater tower - case study

FOREWORD Advanced Cyclone Systems, S.A. (ACS) designed and supplied a Hurricane cyclone system for Duna-Drava Kft cement plant in Beremend, Hungary, (a member of the HeidelbergCement Group, the global market leader in aggregates), as part of an energy recovery project. To maintain the quality of the ground Pet Coke within the specifications in terms of ash content, ACS was contacted with the ...

May 1, 2013

By Advanced Cyclone Systems, S. A.

Characterization of Concentrated Dispersions with Several Dispersed Phases by Means of Acoustic Spectroscopy

Acoustic attenuation spectroscopy can characterize the particle size distribution (PSD) of mixed concentrated dispersions, i.e., systems having more than one dispersed phase. In this paper, we will suggest two models that can be particularly helpful for describing such mixed dispersions. The first “multiphase” model assumes that we can represent the PSD of a real-world dispersion as a sum of ...

Sep. 7, 2000

By Dispersion Technology Inc.

Apply appropriate models in the study of dry deposition fluxes of particulate matter and polycyclic aromatic hydrocarbons (PAHs) in Tsukuba, Japan

In this study, plates for downward flux and upward flux were used to measure atmospheric dry deposition fluxes for particulate mass and polycyclic aromatic hydrocarbons (PAHs) in TERC (Tsukuba), Japan. Ambient particles concentrations were also collected using a high-volume air sampler, and ambient particle size distributions between 0.01 μm and 13.1 μm were measured using a low-pressure cascade ...

Apr. 8, 2009

By Inderscience Publishers

$Particle size characterization of oak wood leachate: chemical oxygen demand and toxicity distribution within different fractions$

Particle size characterization of oak wood leachate: chemical oxygen demand and toxicity distribution within different fractions

Oak wood leachate obtained from two storage facilities (storage pound and ditch) in a wood-based industry, and leachate generated by a laboratory leaching test, were characterized in seven categories regarding particle size distribution (PSD) (raw leachate, ≤20 μm, ≤10 μm, ≤1.2 μm, ≤13 nm, ≤5 nm and ≤2 nm). The PSD followed a normal ...

Aug. 7, 2014

By IWA Publishing

Micro Flow Imaging Technology for Parenteral Applications

MFI™ for Parenteral Drugs USP Chapter 788 (Particulate Matter in Injections) describes physical tests to be performed for the purpose of enumerating subvisible particles within specific size ranges. Recently the FDA has published a Stimuli Article (reference USPC 30 (6) Pages 2272-2280) demonstrating that advances in apparatus and quality control merit reducing the permissible particle ...

Aug. 17, 2007

By WIS Biomed

Bioaccumulation, toxicokinetics, and effects of copper from sediment spiked with aqueous Cu, nano‐CuO or micro‐CuO in the deposit‐feeding snail, Potamopyrgus antipodarum

This study examined the relative importance of copper form (aqueous Cu and CuO particles of different sizes) added to sediment for bioaccumulation, toxicokinetics, and effects in the deposit feeder, Potamopyrgus antipodarum. In Experiment 1 the bioaccumulation of Cu (240 µg Cu/g dry wt sed) added as aqueous Cu (CuCl2), nano‐ (6 nm, 100 nm) or micro‐ (<5 µm) CuO particles in adult snails was ...

Mar. 7, 2013

By John Wiley & Sons, Ltd.

A laboratory and in situ postexposure feeding assay with a freshwater snail

Contaminant‐driven feeding inhibition has direct and immediate consequences at higher levels of biological organization, by depressing the population consumption and thus hampering ecosystem functioning (e.g., grazing, organic matter decomposition). The present study aimed at developing a short‐term laboratory and in situ assay based on the postexposure feeding of the freshwater snail ...

Jul. 19, 2013

By John Wiley & Sons, Ltd.

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