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Environmental

Meet your environmental sustainability targets in coolant filtration, wet FGD processing, waste, process or potable water treatment by using Sefar filters and screen.

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Sefar filter solutions for coolants cleaning, water filtration and FGD gypsum dewatering

For environmental technologies, the application range of our filter materials covers many areas, such as the treatment of dehydration of wet FGD gypsum from power stations or taking out heavy metals in FGD waste incinerators  (W2E) on belt filters, centrifuges, filter presses and candle filter, coolant oil and emulsion filtration on belt and candle filters, membrane and mesh filters for technical cleanliness according VDA 19 and ISO 16232, sludge dewatering and drying using filter presses and dryer belts, microfiltration to screen water on disc and drum filters or helping to achieve cross flow targets on reverse osmosis DTRO filters for process, waste and potable water treatment meeting EPA standards.

Filtration of coolant lubricant

Sefar has pioneered the coolant filtration and is helping leading companies to save money, reduce their environmental impact and maintain the highest possible product and production standards.

The Sefar product range is dedicated to filters using cooling fluids in the metalworking, steel mills and automotive industries, no matter if it is emulsion, oil or wash water. The main advantage of Sefar filter fabrics, compared to traditional media, is the possibility of keeping filter efficiency and the average flow rate at extremely high levels.

By using Sefar filter belts, perfectly purified coolants provide a very good surface finish and a longer tool lifetime. Compared to paper filters or nonwovens, endless filter belts can improve the ecological footprint, increase sustainability, reducing waste costs and quantity. Last, but not least, security filters using bags.

To test the technical cleanliness of the final metal work piece according to VDA 19 and ISO 16232, as well as, the quality of the oil and emulsion (ISO 4406), Sefar offers 5 µm mesh filter and other filter membrane types. These tests take place in a clean room, for which Sefar supplies filter mesh to improve the air flow behavior of the laminar flow roofs.


Filter types

Low-pressure belt filter (UDF), suction belt filter (SF/ HSF), pressure belt filter (HKF/ DBF/ PBF), hinged belt filter, vacuum belt filter, rinsing cabinets, filter nipples, candle filters, control filters, filter presses


Sefar filter solutions for OEM

Our products meet the specific needs of these filtration applications and are successfully running all over the world on all known equipment brands and OEMs, such as:


Hoffmann Apparatebau

Knoll (VLO, VLK, VL)

Bürener Maschinenfabrik (BMF)


Köbo

Hydromation

Dürr Ecoclean


Polo

Bär

Positech


Faudi

Mayfran

FES


Hollandfilter

Mayfran

GKD


Mannesmann-Sack Filter

Faudi

Novotecnic


Ecofluide

GP Torino

Barnes International


Kenfilt

Bilfinger

Fuhr Filter Technology


Gläser

Pall

Sartorius


FGD gypsum dewatering and heavy metal reduction in waste incineration plants

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Flue gas desulfurization, using wet scrubber technology, is one of the main components to purify the flue gas in a modern lignite or coal-fired power plant. A positive side effect is the emergence of synthetic FGD gypsum as by-product.

In order to use it in the construction industry, the FGD gypsum is dewatered on a belt filter (VBF) to a low residual cake moisture of below 10%. Sefar belts are ideally suited for this continuous gypsum dewatering process.

Years of experience in the production of fabric filters, in the form of a double-layered fabric (DLW), enable customers to meet the high demands on low residual cake moisture, while simultaneously achieving excellent cake discharge and belt cleaning properties. In addition to the use of filter belts, drum filters or centrifuges for the dewatering of gypsum are also used. Sefar filter belts have proven themselves thanks to their excellent drainage, low residual cake moisture, good cake discharge and long service life.

 

The resulting fly ash slag must be washed and dewatered to reduce the amount of heavy metals. Like in the FGD gypsum production, belt filters from Sefar are used for this purpose. These modern facilities, also known as W2E or WTE, convert 'Waste into Energy'. As in coal-fired power plants, toxic flue gases are produced during combustion. The resulting slag must be filtered from any heavy metals on belt filters as in the FGD gypsum dewatering. Fabric filters from Sefar are used for this purpose. The proven double-layer structure (DLW) enables optimum filtration performance on vacuum belt filters (particle retention, washing and draining) while maintaining high stability. Depending on the system, further process steps on candle filters with filter bags or filter presses with filter cloths can be carried out in order to recover and reuse valuable substances such as zinc from the slurry.


Filter types


Sefar filter solutions for OEM

Our products meet the specific needs of these filtration applications and are successfully running all over the world on all known equipment brands and OEMs, such as:


Andritz (Delkor)

BHS

Compositech filters


RPA (Filtres Philippe)

FLSmidth (Dorr-Oliver/Eimco)

Thyssen Krupp


Hitachi

TSK

Huzhou Hexing


Huzhou Hehua

Huzhou Wangneng

Outotec (Larox/Pannevis)


Yantai Tongxin

Xuhe Environment

Andritz KMPT (Krauss Maffei)


Ferrum

FLSmidth Broadbent

Heinkel – gypsum design


Andritz Separation

BHS Filtration

Bokela


Eimco

Komline-Sanderson

Westech


Compositech filters

BHS Sonthofen

BSH Umweltservice AG


DrM, Mahle


Process, waste and potable water treatment filters

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Sustainability and environmental awareness, increased efficiency, purity and cleanliness requirements are just a few of the keywords in water filtration and purification. Increasing demands in process water treatment, international standards or regional laws and regulations are some of the challenges that municipal and industrial water, drinking water, sewage and sludge treatment facilities must increasingly face.

Municipal or industrial companies are faced with the challenges of finding cost-efficient solutions with simultaneously increasing demands for wastewater treatment – whether it is detoxification, draining and drying of sewage sludge, membrane filter presses or belt drying and drainage systems.

Various filter press cloths (single, double or overhang cloth) offer good cleaning capability, fast drainage and long cloth life in addition to optimal cake discharge. Especially when using fully automatic membrane or chamber filter presses, the choice of fabric, i.e. the choice of filter material, the fabric weave, the throughput rate is essential to guarantee smooth operation and low costs. Modern sewage treatment plants do not only perform primary and secondary filtration, but also clean the water in a tertiary filtration stage – whereby a separation of solids and liquids takes place in the microfiltration area. Filters with up to 5 μm fineness remove tiny particles from the water. This creates the optimum conditions for a further process step as a preliminary stage for membrane filters or avoids environmental pollution and keeps micro-plastic waste out of the environment.

There are additional challenges in the areas of drinking water, process water treatment or reuse, i.e. the recycling of process water. The proportion of fines in the filtrate must be as low as possible; good cleansing of the product or a clear separation of solids in the slurry must be achieved. Different filters are used depending on the process step and application: from candle filters, especially with low solids content, to leaf filters for large throughputs, reverse osmosis filters for the separation of very fine particles, or drum sieve or disc sieve filters. Sefar offers a wide range of different materials and finishes for various applications – from screen fabrics with different degrees of opening and crossflow, to monofilament or multifilament filter cloths for very fine to very coarse particles, filter membranes, segments, prefabricated filter elements, filter discs or round woven tubes, from polypropylene (PP) to polyester (PET) to PVDF, PEEK or other special filters.


Filter types

Filter presses, membrane filter presses, chamber filter presses, disc filter, drum filter, candle filter, vacuum belt dryer, sieve filter, reverse osmosis filter, membrane filter


Sefar filter solutions for OEM

Our products meet the specific needs of these filtration applications and are successfully running all over the world on all known equipment brands and OEMs, such as:


Aquachem

MSE

Nordic Water


Huber SE

Gerrum

Hydrotech


Bilfinger

B&B

Evoqua


Siemens

In Eko

Organica


Invent

Hubert

Pall


Eaton

Durco

Algas


Alva Laval

Bucher Unipektin

Andritz


BHS

Mahle

DrM


Contact your local
filtration specialist

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