Technical articles

Continuous Pressure and Vacuum Filtration and Washing of Organic Cellulose and Biomass Products

BHS-Filtration Inc.

The processing of organic, cellulose-containing materials has been around for many years. Currently, due to high oil prices as well as the significant increase in ethanol usage nationwide from both grain based and cellulosic based sources, there is tremendous interest in developing efficient, cost-effective manufacturing processes to produce energy from cellulosic feed stocks. This article will use actual process data to highlight the choice of pressure or vacuum filtration and cake-washing techniques for these newly developed bioprocesses.

Published in: BHS-Filtration Inc. - 2009
PDF (293 KB)
Continuous Pressure and Vacuum Filtration and Washing of Organic Cellulose and Biomass Products
2009
October 2009

Size: 293 KB

Rotorshredder makes light work of refrigerators

Recycling International

To date, the RS Rotorshredder developed by German company BHS-Sonthofen has been used mainly for the disintegration and size reduction of mixed electronic waste and of shredder light fractions. But according to the manufacturer, the machine has not been exploited to anywhere near its full potential. However, since the summer of 2008, the largest model - the RS 3218 - has been used in the size reduction of refrigeration appliances by recycling company H.J. Hansen A/S of Odense in Denmark.

Published in: Recycling International - October 2009
PDF (179 KB)
Rotorshredder makes light work of refrigerators
October 2009
October 2009

Size: 179 KB

Shredder light fraction: the push to crush

Recycling International

Separation of the individual components of the shredder light fraction (SLF) is no easy task. However, German plant manufacturer BHS-Sonthofen has developed selective crushing machines which, it claims, can engineer potentially significant cost savings for shredder operators via the disaggregation and cleaning of input SLF material.

Published in: Recycling International - August 2009
PDF (340 KB)
Shredder light fraction: the push to crush
August 2009
August 2009

Size: 340 KB

Settle down - Selection of Liquid/Solid Separating Equipment

TCE

In this three-part article, in part 1 Messrs. Pierson and Perlmutter discuss testing, selection of liquid/solid separating equipment and give practical filtration tips. In part 2 of this, Messrs. Pierson and Perlmutter discuss the finer points of filtration. Finally, in part 3 of their series, Messrs. Pierson and Perlmutter provide a summary and preliminary selection guide for various types of pressure, vacuum, batch and continuous filtration equipment.

Published in: TCE - June 2009
PDF (2.0 MB)
Settle down - Selection of Liquid/Solid Separating Equipment
June 2009
June 2009

Size: 2.0 MB

Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross

AT MINERAL PROCESSING

Metal-containing waste, e.g. slag, incineration ash and dross, are formed during the production of metals and are to be recycled as waste-derived materials. To obtain an optimal and marketable separated product from the processing of these material groups, the process parameters must be individually adjusted depending on the required final product, but series of tests conducted at the BHS test centre have shown that the above-mentioned wastederived materials can be processed in the same machine systems despite different their material properties.

Published in: AT MINERAL PROCESSING - 5/2009
PDF (180 KB)
Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross
5/2009
June 2009

Size: 180 KB

Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross

METALL

Metal-containing waste, e.g. slag, incineration ash and dross, are formed during the production of metals and are to be recycled as waste-derived materials. To obtain an optimal and marketable separated product from the processing of these material groups, the process parameters must be individually adjusted depending on the required final product, but series of tests conducted at the BHS test centre have shown that the above-mentioned wastederived materials can be processed in the same machine systems despite different their material properties.

Published in: METALL - 5/2009
PDF (2.3 MB)
Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross
5/2009
May 2009

Size: 2.3 MB

A treatise of filter cake washing mechanisms in pressure and vacuum filtration systems

BHS-Filtration Inc.

During many chemical and pharmaceutical process operations, cake washing is required since no filter system can remove all of the mother liquor by pressure or vacuum dewatering only. The need for cake washing to produce a “clean cake” for further processing, drying or disposal can be for several reasons including the removal of the mother liquor, exchange of solvents, dissolution of soluble components and the displacement of insoluble contaminants.
The topic of “how to most efficiently wash the cake” is one that many process engineers struggle with when considering the various techniques available to meet the economic, production and quality requirements of the operation. Chemical engineering textbooks are notoriously shy on the subject and such information that is available is frequently lost in a host of theoretical equations. This article introduces pragmatism into cake washing theory and will help to guide engineers during their decision-making processes.

Published in: BHS-Filtration Inc. - June 2008
PDF (462 KB)
A treatise of filter cake washing mechanisms in pressure and vacuum filtration systems
June 2008
June 2008

Size: 462 KB
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