Andritz Centrifuge Decanters

Industrial technology perfectly adapted to the treatment of wastewater sludge CENTRIFUGATION is your guarantee for: Best performance (dryness, capture rate…) Continuous and fully automated sludge dewatering Polyvalence of operation (dewatering, thickening with or without polymer…) Optimum flexibility (adjustment of operating parameters while running) Lasting robustness Compact design and low space requirement Andritz, the specialist for solid/liquid separation for over 50 years, offers you the right solution for your needs.

Belt Filter Presses

PowerPress Series The best technical and technological solution for large municipal and industrial sewage treatment systems. Robustly designed in a stainless steel frame are a prerequisite for a long useful life. Principle of Operation Features Optimum pressure increase up to 1.2 bar by 11 S-rolls Sturdy frame design in stainless steel (1.4301 or 1.4571) Variable speed drive for the upper and lower belts High-quality roll covers made of rubber or polyamide and roll bearings with double V-ring sealing Belt cleaning with stainless steel spray pipes, optionally with internal cleaning brushes to keep the shower nozzles clear Separate discharge of filtrate and belt wash water for wash water recycling

Chamber Filter Presses

Traditional recessed chamber filter press operation employs a steady increase in pressure over time as the cake thickness increases, in order to achieve the optimum combination of chamber filling and cake dryness. At a significantly reduced filtrate rate, the filtration is stopped, the press discharged and a new cycle started. Chamber filter presses are reliable and robust in many different applications. The plate pack consists of uniform chamber plates with a recess of 15 - 50 mm to receive the filter cake. A chamber plate is a combination of a filter plate and two frames in once piece. The standard material for chamber plates is Polypropylene. Possible operating pressures: 6, 15 and 30 bar.

Hyperbaric Pressure Filter

The continuous dewatering system for low final moisture & high capacity. Available as disc filter with up to 168 m² filtration area. This filter exceeds the user's expectations! The HBF proves its excellence compared to conventional vacuum disc/drum filters or various batch processes particularly on extremely fine-particle slurries. The totally enclosed system offers large filter areas at low space requirement, because the specific capacity is up to 10 times higher then on vacuum filters. The resultant low moisture content can otherwise be obtained with batch-type filters only.

Membrane Filter Presses

During the initial phase of the filtration cycle, so-called “fill and filtration” the process is similar to the chamber filter press. After reaching a predefined pressure, usually around 4-10 bar, depending on the sludge characteristics, sludge feeding is stopped and the membranes slowly inflated, using either water or air as squeeze medium. The cake is hereby compressed and dewatered further. This process is continued until the filtrate flow reaches a preset minimum limit. Then the squeeze medium is relieved and the cake discharged. Membrane filter plates are designed just like the previously described chamber plates. A flexible membrane is fixed to the support body. Materials for the membranes include Polypropylene, synthetic rubber (for example NBR, EPDM) or thermoplastic elastomer (TPE). Special materials such as PVDF are also available. The membrane is impermeable and serves to compress the cake within the chamber after the filtration process is complete. Liquid or gas (compressed-air) can be used as membrane inflation media. In order to guarantee maximum protection for the membrane filter press, we use special safety systems for the various membrane inflation media. Inflation pressures up to 30 bar, and in special cases even higher, are possible.

The Fine Screening Technology

Andritz launched the fine screening concept towards the end of the Seventies and has since been setting the standard in over 50 countries. It has been a pioneer in the field with the self-cleaning AQUA-GUARD® continuous belt screen series. AQUA-GUARD® screens are leaders everywhere in the world - more than 5 000 reference installations prove this. AQUA-GUARD® screens can be quickly installed into any type of channel, including existing ones, and are easy to maintain due to their compact, robust design. Optimized operation and separation efficiency secure high throughput also for pollution-laden waters.

Thermal Process Technologies

Why Thermal Treatment? Whether the sewage sludge is to be used as fertiliser, re-cultivate soil, as compost, or put to thermal use, there are four basic requirements: Maximum reduction of sludge volume High calorific value of sewage sludge Stringent environmental regulations for sludge disposal Environmental sustainability (reduction of CO2 emissions) Why Andritz Dryers? Different technolgies for a variety of applications Final product (granulate from sewage sludge) of high quality with homogeneous dry content (EPA Class A) Optimum energy utilization / Combined hHeat and pPower concepts Efficient odour treatment Proven safety systems for all our plants (compliance with ATEX and HSE) In-house design and manufacture of major plant items and control systems Process integration in existing plants Complete system solutions CE-conformity Worldwide references Ease of operation Low operating costs Ease extension of thermal incineration system (EcoDry) Standardized plant sizes (lower capital costs) Efficient after sSales and service management