Filtration SolutionsCorn Wet Milling

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Sefar solutions for the starch industry– Ready-made filtration belts individu-

ally tailored for drum filters, rotarybelt filters and horizontal belt filters

– Ready-made filter press cloths indi-vidually tailored for filter presses

– Safe and easy-to-use closure systems– Device-specific edge fabrication for

optimal tracking behavior– Broad selection of fabrics for pro-

duct specific filtration optimizations

Sefar advantages for the starch industry at a glance:– Maximal filtration performance– Increase of product quality– Optimal cake build-up– Optimal cake release– Straight belt run– Cost savings through increased life-

time and quick dewatering– Ready-made solutions for drum

filters, rotary belt filters, horizontal belt filters, filter presses, leaf filtersand tube filtrations

– High mechanical stability– Stringent quality control– Vast experience in the development

of complete solutions– FDA quality available

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Sefar solutions

Starch sources

Starch products

Sefar solutions for the starch industry– Ready-made filtration belts individu-

ally tailored for drum filters, rotarybelt filters and horizontal belt filters

– Ready-made filter press cloths indi-vidually tailored for filter presses

– Safe and easy-to-use closure systems– Device-specific edge fabrication for

optimal tracking behavior– Broad selection of fabrics for pro-

duct specific filtration optimizations

Sefar advantages for the starch industry at a glance:– Maximal filtration performance– Increase of product quality– Optimal cake build-up– Optimal cake release– Straight belt run– Cost savings through increased life-

time and quick dewatering– Ready-made solutions for drum

filters, rotary belt filters, horizontal belt filters, filter presses, leaf filtersand tube filtrations

– High mechanical stability– Stringent quality control– Vast experience in the development

of complete solutions– FDA quality available

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Sefar solutions

Starch sources

Starch products

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Sefar and the starch industry

The extraction and processing of starch from agricultural commodities is one of the most important agro-industries worldwide. Using corn, wheat, potatoes,tapioca and rice as raw materials, about 49 million tons of starch is produced and processed annually.

While mainly used in the food and beverage industries, starch is also useful for a number of applications

and industries including textiles, paper, plywood, adhesives and pharmaceuticals.

Sefar’s expert know-how can help to improve your specific process by helping you select the right filtration media for your application. Synthetic fabrics from Sefar are especially renowned for their precise pore/mesh sizes and their stringently controlled production processes. These factors guarantee that the

fabrics can be reproduced time after time, having consistent filtration/sieving behavior plus mechanical stability. Since the production of the fabrics and the fabrication of the final filtration products are core competencies of Sefar, we are able to produce not only superior products, but also real solutions to improve your processes.

Overview

Our know-how is your advantageSefar is a company with a long tradition of over 180 years in the production of fabrics, many used in the food and beverage processing industries. This vast base of accumulated experience and process know-how guarantees professional and innovative solutions.

Our service offering at a glance• Laboratory analyses

• Laboratory filtration tests

• In field filtration testing

• Fabricated articles for customized solutions

• Broad selection of accessories for filtration, sieving and classifying needs

• Training for customers in tensioning of screening frames and the installation of filtration belts

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Centrifuges – with Sefar always on lineThe starch dewatering process is a trade-off between capacity and dryness of the product. Whereas drum and belt filters are continuous filtration processes, centrifuges are batch processes. Their ability to obtain a dryer product makes them an alternative to continuous systems. In cases where an output having the best possible dryness from the starch dewatering process is more important than a continuous

process, liner centrifuges are a common solution. Sefar liners with their wide range of pore sizes and permeability are suitable for all separation tasks and are not subject to clogging. High-quality manufacturing eliminates common wrinkling and folding problems that contribute to shorter cloth lifetime. In some cases synthetic liners in centrifuges are even outperforming perforated metal plates in filtration performance and clogging behavior.

Sefar filters for rotary drum vacuum filtersRotary drum vacuum filters are used in starch and gluten dewatering processes and in the polishing process of syrup as a so-called pre-coating filtration. But modern equipment alone is no guarantee for an optimal filtration process. The performance of a drum filter and the quality of the final product are highly dependent on the filter media used. Together with the machine

type and cake discharging system, the concentration of the suspension and the particle size influences the choice of the filtration media. The precision of the pore sizes is important, especially early in the filtration process. Sefar has great experience in the optimization of filtration processes in the corn wet milling industry. Our experts will work to ensure that your final filter product is of the highest quality and performance.

Starch and gluten dewatering

Rotary drum vacuum filter equipped with Sefar filter media for starch dewatering

Centrifuge liner

Sefar gluten belt

Belt profile for rotary drum vacuum filter machines

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Polishing and sifting

Sefar filter press clothsOil is a valuable product won during corn/wet milling. Filter presses are often used in control filtration processes. Sefar produces filter cloths with a variety of fabrics. Whether using a durable multifilament or an efficient monofilament, Sefar can customize the right fabric for your process. The cloths are fabricated, ready-to-use in all sizes.

Sefar leaf filter covers Within the starch industry, leaf pressure filters can be used in the syrup polishing process. Our goal is to supply ready-to-use filter covers, designed for easy installation, minimum downtime and maximum efficiency. The perfect fit of our filter covers over the leaves significantly reduces product loss and related problems.

Sefar screensIn the production of native starch and in the modification process of starch, many screening processes are applied. Technical proficiency, combined with application experience, allows Sefar to offer screen products with the best combination of performance and long service lifetime. As a weaver of fine screen mesh materials, Sefar can help you select just the right screen mesh for your application and provide you with screens that are carefully pre-tensioned before being bonded/welded.

Sefar filter press cloth with flexible neck, rubber coating and Velcro fixing

Sefar leaf filter covers

Sefar round screen panels

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Under pressure – Sefar brings claritySyrup is a valuable product won during starch production. For controlfiltration processes often filter pressesare used. Sefar produces filter presscloths made out of monofilamentyarns: these outperform multifilamentyarn types in longevity and ease ofcleaning. The cloths are fabricatedready-to-use in all sizes.

Sefar’s leaves don’t let you down Within the starch industry leaf pres-sure filters can be used in the syruppolishing process. Our goal is to supplyready-to-use filter covers designed foreasy installation, minimum downtimeand maximum efficiency. The perfectfit of our filter covers over the leavessignificantly reduces product loss andrelated problems.

Quick-release action - Fluid beddryer bags from SefarFluid bed dryers are often used in thedrying process of raw and modifiedstarch. At the heart of such dryers arebags primarily manufactured frompolyamide and polyester. They providethe physical properties critical to everyfluid drying operation: excellent abra-sion resistance and a non-stick surfacearea for increased airflow and mini-mized blinding. Smooth surfaces onthe filter cake side ensure easy clean-ing and solids release.

P r o d u c t s

Screening – all-round success withSefarIn the production of native starch andin the modification process of starch,many screening processes are applied.Technical proficiency combined withapplication experience allows Sefar tooffer screen products with the bestcombination of performance and longservice lifetime. As a weaver of finescreen mesh materials, Sefar can helpyou select just the right screen meshfor your application and provide youwith screens that are carefully preten-sioned before being bonded/welded.

Sefar filter press cloth with cloth neck, rubbercoating and Velcro fixing

Sefar leaf filter covers Sefar fluid bed dryer bags

Functionality of a round screener: our screenexperts can help you select the combinationof pore size and open area to maximizethroughput

Round screen panels from Sefar

Functionality of a round screener: our screen experts can help you select the combination of pore size and open area to maximize throughput

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Polishing and sifting

Tube for control filtration

Sefar Sieving & classifying productsThe required particle size for powdered products, like maltose and dextrose, is determined by the specific quality standard of the final product and can often be well below 50 μm. A precise grading degree is especially important for high value products. Sefar offers a broad product range of open mesh sieving fabrics – having mesh sizes from 5 μm upwards – for use in plansifters and other sieving machines. Our know-how, gained from many years in the field, covers the entire processing procedure – from the initial wet filtration through the final sieving and classifying of dry milling.

Centrifugal sifters are often used in place of plansifters in the starch industry. The mechanical stresses that the cylinders are subjected to in the sieving of dried products call for filter cloths that meet the highest standards. Sefar offers a broad selection of highly abrasive resistant sieving fabrics and state-of-the-art fabrication solutions. Sefar centrifugal sifter

Sefar tubesIn sweetener processing and alcohol production, tubes can be used for control filtration. Sefar offers many fabrics to optimize particle capture with flow through.

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DRY MILLING

Grinding and sifting processGerm

separation/removal process

Fiber removal process

Gluten removal process

Starch cleaning & drying process

WET MILLING

Corn Wheat Potato TapiocaPotato Corn

GritsAnimal Feed

Flour Germ

GrindingCleaning Germ washing

Germ dewatering

Germ drying

Filtration

Oil pressing

Fine grinding Mill stream thickening

Starch washing

Native starch slurry

Starch dewatering

Starch drying

Gluten thickening

Gluten drying

Gluten dewatering

Starch & gluten separation

Fiber washing

Fiber dewatering

Fiber press

Feed dryer

Rasping

Concentration

Extraction

Washing

Cleaning

Steeping

Steepwater

Screening

Screening

Sifting

Purification (wheat only)

Process step

Intermediate and/or final product

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Native starch slurry

Concentrated steep liquor

Fiber press

OilGluten

Native Starch

Germ separation

Washing/steeping process

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Starch modification process Sweetener process

STARCH REFINING

Native starch slurry Native starch slurry

Starch treatment

Low dextrose solution

Low dextrose solution treatment

Unrefined corn syrup

Saccarification

Ultra-filtration

Evaporation

Isomerisation Yeast fermentation

Carbon treatment

Carbon treatment

Ion exchange

Ion exchange

Bacterial or yeast fermentation

Fractionation

Dilution/blending with 42 HFCS

Screening

Screening

Dextrose syrup polishing

Fructose syrup polishing

Crystalline fructose dewatering

Control filtration

Modified starch dewatering

Modified starch drying

Screening

Starch Treatment

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Modified Starch

Corn syrup = glucose syrup = dextrose syrup

42 HFCS

AminoacidsBroth

Bio products

Membrane Separation Distillation

Filtration

CO2

Alcohol

96 HFCS

55 HFCS

Crystalline fructose

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Sefar Inc111 Calumet Street, Buffalo, New York 14043Phone: 800.995.0531 | Fax: 716.685.9469e-mail: sales@sefar.us | www.sefar.us Re

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