In the industrial treatment of drinking water, as a targeted change in water quality, water from a wide variety of sources, such as a reservoir, surface water, dam water, etc. is fed to a water treatment plant and treated. Depending on the origin of the untreated water to be filtered, however, filtration is difficult (content of undissolved and organic particles). An essential process step for the treatment of the water and for the improvement of the cleaning effect is, for example, flocculation and flocculation filtration in the treatment plant. Depending on the official requirements, the untreated water is conditioned with suitable flocculants (e.g. polymers, iron (III) chloride or aluminium sulphate) and additives. Small amounts of solid impurities are precipitated and accelerating the sedimentation of the formed flakes. Subsequent mechanical filtration separates the turbidity as well as iron, manganese or arsenic from the water.

DRINKING WATER TREATMENT IS A MATTER OF TRUST

In view of the efficiency of mechanical dewatering compared to many other dewatering systems, membrane filter presses are mainly used as process equipment in the field of drinking water treatment. MSE membrane filter presses offer high filtration rates and the best possible filtration results as well as outstanding dewatering results (independent of conditioning) due to their design-typical features and the exclusive and proven filter plates. For fast cycles and the associated high capacities, MSE filter presses are available in a fully automatic design. Experience has shown that membrane filter presses with large filter areas, in sizes from 1200x1200mm up to 2000x2000mm, in combination with an automatic filter cake release aid are best used for drinking water treatment.

Whether in people’s everyday lives or in business: Water plays a decisive role. New aspects of environmental protection are increasingly tightening the legal situation regarding the regulated discharge of waste water into a body of water (§8 and §57 of the Water Resources Act (WHG)). The efficient solid-liquid separation processes, which are required to reduce the harmfulness and the amount of waste water to be discharged to a minimum, are of worldwide relevance. For commercial and industrial companies, these legal requirements as well as the increasingly scarce landfill areas for the disposal of dewatered solids are associated with high financial costs (Waste Water Levy Act (AbwAG)). This increases the demand for waste water treatment and recycling of the process waste water as well as for the highest possible degree of dewatering. In view of their efficiency compared to all other dewatering or drying systems, membrane filter presses are mainly used as process components in the field of waste water filtration. These can be used to remove industrial/process waste water such as sewage sludge, metal hydroxide sludge, grinding sludge, drilling water, latex waste water, etc., for example:

• • Steelworks

• • Galvanisation companies

• • Tanneries

• • Paper mills

• • Leather factories

• • Building materials and wood processing industry

• • Flue gas cleaning plants

• • Flue gas desulphurisation plants

After appropriate preconditioning, the filter cake can be filtered easily and economically and then disposed of. If necessary, the purified waste water can be returned to the process. MSE chamber filter presses and membrane filter presses offer high filtration rates and the best possible filtration results as well as outstanding dewatering results (independent of conditioning with polymer flocculants or lime/iron) with their design-typical features and the waste water and proven membrane filter plate and cloth technologies for the different applications. MSE filter presses are available with a fully automatic design for a fast cycle time and the associated high capacities. An exemplary option here is the automatic filter cake release aid for adhering filter cakes. These efficiently designed process parameters are particularly important from an economic point of view. Our products thus contribute to increased filtration process productivity with their solid, robust and high-quality architecture which is well-known on the market.

Read our detailed publication about sewage sludge filtration in collaboration with the Karlsruhe Institute of Technology (KIT) in the cleaner-production.

Waste recycling is a mainstay of waste disposal, particularly in Germany (approx. 20 million tonnes), Austria and Switzerland (approx. 5.5 million tonnes). Waste treatment makes a decisive contribution to the protection of resources. For example, by returning recyclable metals to the material cycle and by using mineral waste as a building material. Waste treatment also makes an important contribution to the generation of electricity and heat in the course of thermal waste treatment. In this context, filter presses are used as solid/liquid separation units, for example in chemical-physical treatment plants for hazardous waste disposal and in waste incineration plants and (coal) power plants for flue gas cleaning and flue gas desulphurisation.

HAZARDOUS WASTE DISPOSAL

In hazardous waste disposal, the processing of specific waste materials in closed reaction containers is essentially carried out by sedimentation, neutralisation, reduction, oxidation and/or precipitation. Organic, acidic and basic liquid wastes, but also inorganic acids and alkalis as well as other concentrates (e.g. thin sludge, landfill leachate or thin acids from combined heat and power plants) are neutralised and further treated depending on their composition. During conversion, pollutants such as heavy metals, chromates or cyanides are removed or immobilised and separated. The resulting sludge is then fed to a filter press and filtered, dewatered and properly disposed of with the aim of a solids-free filtrate and a puncture-proof filter cake. In a further step, the organically contaminated filtrate produced by the solid-liquid filtration is purified via activated carbon. The treated waste water is then discharged into the sewer system damage-free in accordance with the respective limit values (see Waste water Treatment). The dewatered filter cakes are temporarily stored and reused as bulk material, IBC containers or drums.

FLUE GAS CLEANING/FLUE GAS DESULPHURISATION

Solid residues from a waste incineration plant, for example, include ash and slag from waste incineration, as well as waste from flue gas cleaning, waste water treatment and filter dust. The flue gas produced during the incineration of residual waste is enriched with a wide variety of particulate and gaseous pollutants. The cleaning of flue gas as a wet process takes place in a multi-stage washing process. This serves as a process stage for the reduction of pollutants such as HCl, SO2, NOx, HF and heavy metals including Hg and organic compounds (dioxins and furans), with the aim of reducing environmental pollution. In the process water treatment plant, the washing solution from the wet scrubber is treated by alkalisation, neutralisation, precipitation, flocculation and sedimentation depending on the process.

The sludge produced in the individual processes is separated from the sedimented solids in a filter press with the aim of producing a solids-free filtrate and a solid filter cake. Depending on the application, the filter cake is dewatered to the maximum solids content in the filter cake required to comply with the classification values of the Landfill Ordinance. Subsequently, it is disposed of at the appropriate landfills. In the subsequent evaporation plants, the resulting clear filtrate is saturated, conditioned and returned to the process cycle.

THE PARTNERSHIP WITH MSE FILTERPRESSEN® GUARANTEES THE SUCCESSFUL IMPLEMENTATION OF YOUR PROJECT

Due to the high degree of dewatering required, membrane filter presses with an included squeezing option are preferred, e.g. for flue gas cleaning and hazardous waste disposal. MSE chamber filter presses and membrane filter presses offer high filtration rates and the best possible filtration results as well as outstanding dewatering results with their design-typical features and the waste water and proven membrane filter plate and cloth technologies for various applications. For fast cycles and the associated high capacities, MSE filter presses are available in a fully automatic design. Here, efficiently designed process parameters, especially from an economic point of view, are of great importance. Our products contribute to increased filtration process productivity with their solid, robust and high-quality architecture which is well-known in the marketplace.