Compact pre-treatment plant

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The Defender® compact pre-treatment plant is a complex equipment that allows the implementation of several processes simultaneously: straining, removal of sand and grease. These facilities include a channel screen conveyors or compacting auger, 2 pcs. screw conveyor (longitudinal and inclined), sand and grease removal bath-tub and scraper system. Once the solids have been filtered, compacted and removed, the equipment is equipped with a fine aeration system located at the bottom of the bathtub, which allows the fat to rise to the surface. The grease is then removed by a scraper trapping system located at the end of the sand and grease removal bath-tub, which transports it to the edge of it from where it is gravitationally extracted by the pipe.

 

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Channel screen conveyors

Defender® channel screen conveyors are versatile equipment that is used in the straining, compaction and transportation processes for mechanical sewage treatment. The installation of these facilities prevents various in type and dimension solids from entering the wastewater and prevent causing the sewers, reservoirs and pipelines clog, and protects the rest of the equipment at the plant from overloading, blocking and wear. The lattice structure in form of bent half-pipe is made of stainless steel with perforations from 1 to 10 mm in size. The characteristic design of the equipment is specially designed for its easy installation in cannals, the implementation can be tailored to the specific needs at different angles and can be offered in two versions with and without compacting bathtub. As advantages of the offered equipment can be emphasized its high transport capacity and easy cleaning (brushes mounted on the outside of the screw keep the grille constantly clean). In the presence of a sealing bathtub for the grid cleaning system are provided water jets. The installed screws are resistant to friction due to the reinforced inner surface of the conveyor tube.

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Conveyor Screw

Defender®  screw conveyor  are made of stainless steel,  which consist of housing in chute form and a screw built into it. They are used in many sectors and activities such as measuring and dosing, storage and transportation. The offered conveyors are distinguished by a design excluding the presence of an internal central half-pipe, which helps […]

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Grit classifiers

Defender® grit classifiers are used in the second phase of pre-treatment of raw water to extract suspended solids (gravel, sand and mineral particles). The purpose of the treatment with the offered equipment is to prevent clogging of the channels and pipelines, to protect the rest of the equipment in the installation from abrasive impact and to alleviate the load in the operation of the next treatment facilities. The grit classifiers consist of a chamber for entering the raw water (made of polyester, reinforced with fiberglass (FRP) or stainless steel) and a hollow chute with an installed screw that captures, retains and transports solid particles. Advantages of the offered equipment are its easy cleaning and maintenance, convenience for inspection through a hatch, design preventing problems with congestion and air tightness and high efficiency (removes up to 97% of sand particles up to a diameter of 0.15 - 0.2 mm).

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