Seft – EcoTech

Combined Wastewater pre-treatment Unit

Combined Wastewater Pre-treatment Unit

GDE performs: screening, sand removal. GDE/D performs: screening, sand removal, oil/fat removal.
Can be supplied in 2 models: • CLS sand classifier + FCP/C screw screen in tank, with perforated rounded or wedge wire profile.
• CLS sand classifier + GRR drum filter, with wedge wire profile. Based on the chosen model, it will be possible to get a different type of screening.
The sewage goes through the screening section for the solid parts removal. Then the sewage falls down a decantation tank where the particles go down. Here an extraction spiral removes them.
FUNCTIONS
• Screening
• washing/compacting of solid removed
• sand/grit separation
• degreasing
MAIN ADVANTAGES
• Odor-free • No clogging
• Low maintenance and operation costs
• Low room needed • No construction works needed
• Easy to install and operate
• Very low residual organic content in the washed out solid
• Volume reduction (up to 40%) of the washed out solid
• Sand removal: >=90% of particles up to 200 μ

MANUFACTURING FEATURES
Building material External structure: stainless steel AISI304L/AISI316L
Screw: HSS carbon steel or ss AISI
304L/AISI316L
Flow rate range 6 or 10 l/s
Inlet pipe Flanged

APPLICATIONS
• Municipal sewage
• Industrial wastewater treatment

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Compact Unit Pretreatment Plants

VSD – Compact SYSTEM FOR SAND REMOVAL AND SAND WASHING

Combined machine able to perform two functions
simultaneously:
• removal and grit
• Oil removal/degreasing
The effluent is fed to the machine through a fixed pipe and decants in the tub; the sands are then removed by a system
of augers, while fats and oils surface are removed from the system of deoiling, by an air bower.

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Combined Pretreatment Compact Unit

GDF GDF/D – PRE-TREATMENT COMBINED COMPACT UNIT

This combined machine is fed by a pump or to gravity, through a fixed pipe.
The effluent passes through a screw screen that removes the largest solid particles, then goes to a sedimentation tank where the particles sedimented are then removed by a system of screws.
As an option you can install the system for removal of fats and suspended oils.
FEATURES
• Filtration
• Wash / compaction of solids removed
• Extraction of sand
• Degreasing (on GDF/D version)

ADVANTAGES
• No odor • Low operating costs and maintenance
• Reduced space requested • Construction work is not necessary
• Ease of installation and management
• Low organic matter in the solid residue extracted
• Reduction up to 40% in volume of solids removed

MANUFACTURING FEATURES

Inlet flow rate up to 300 lt./sec.
Filtering options ø 2 ÷ ø 7 mm holes ø 0,25 ÷ ø 2,5 mm wedge wire profile

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Pre-treatment Combined Compact Unit

STV/T – COMPACT PLANT FOR CESSPOOL ACCEPTANCE

In this model of combined machine the waste water discharged from the tank truck is filtered so as to remove the solid parts, more coarse, and then conveyed into a tank where sands settling occurs, subsequently removed with a system of screws. As an option a system for removal of fats / oils floating is provided.

FEATURES
• Filtration
• Wash / compaction of solids removed • Grit removal • Degreasing

ADVANTAGES
• No odor
• No obstructions • Low operating costs and maintenance
• Compactness of installation
• Construction work is not necessary • Easy installation and management
• Low residual content of organic matter
• Reduction of up to 40% by volume of the solid removed • No pumps

MANUFACTURING FEATURES
Inlet flow rate up to 150 m3/h Filtering options ø 3 ÷ ø 7 mm holes

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Internally Fed Rotary Drum Screen

IFS – INTERNALLY FED DRUM SCREEN

The internally fed drum screen IFS is composed of a tank and a spiral connected to a drum for the screening transportation.
The screen is made of a perforated plate and the perforated holes profile diameter can be selected on the customer’s needs. The drum is supported by nylon wheels, and it is operated by a gearbox. The filter is fed through a nozzle placed in the front of the machine. A diffuser spreads the water on a large area of the screen which, rotating, separates water from the organic particles contained. The filter is cleaned through a washing system consisting in a tube with spray nozzles for pressurized water.
During machine operation, the water is conveyed at the outlet placed in the front of the machine, while the screenings are transported by the spiral towards the screening outlet in the back of the machine. The screen inclination contributes to the dewatering of screenings. The screen is also equipped with a by pass pipe to avoid overflows with a predisposition for a overflow sensor.

APPLICATIONS
• civil waste water treatmentplants
• industrial waste water treatmentplants
• tanneries
• industrial laundries
• slaughterhouses
• paper mill
• textile industry
• fish industry
• food and chemical industries

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Rotating Filtering Drum with Integrated Compactor

GRP – ROTATING FILTERING DRUM WITH INTEGRATED COMPACTOR

The GRP drum screen is constits of stainless steel case with a rotating drum filter made of wedge wire plus a shaftless spiral conveyor press integrated in the machine body.
The wastewater flows inside the feeding tank through a flanged spout and it is conveyed on the external surface of the filtering drum by a special distributor.
The cleaned water get through the filtering surface toward the outlet spout, while the solid particles remain on the rotary drum surface and they are subsequently removed by a fix blame placed at the opposite side of the drum and discharged internally in the spiral compactor.
The filtering is kept clean by a washing system, so the filtering part is ready to repeat the cycle at every turn.

ADVANTAGES
• Compactor unit integrated – Compact size
• Low maintenance
• Self-cleaning drum filter

MANUFACTURING FEATURES
Inlet flow rate Up to 2000 m3/h Filtering options 0,25 ÷ 2,5 wedge wire 1,5 / 2 / 3 mm perforated holes

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Rotating Filtering Drum

GRR – ROTATING FILTERING DRUM

The GRR grind is constits of stainless steel case with a drum filter made of wedge wire rotating in. Thewastewaterflowsinsidethefeedingtankthrougha flangedspoutanditisconveyedontheexternalsurfaceof the filtering drum by a special distributor. The cleaned water get through the filtering surface toward the outlet spout, while the solid particles remain on the rotary drum surface and they are subsequently removed by a fix blame placed at the opposite side of the drum. The filtering is kept clean by a washing system. The filtering part is ready to repeat the cycle at every turn since it is particle less.

ADVANTAGES

• Built entirely of stainless steel AISI304-316

• Compact size • Low maintenance • Self-cleaning drum filter

• Wedge wire filter MANUFACTURINGFEATURES Inlet flow rate Up to 2100 m3/h Filtering options 0,25 ÷ 2,5 wedge wire

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Channel Rake Screen

CRS – CHANNEL RAKE SCREEN

The coarse screening is the first step which must be considered in a civil or industrial wastewater treatment
plant. Its purpose is to intercept and remove large sized solids that can damage and / or slow down the depurative processes and
plant equipment, or obstruct the pipelines. It is particularly important before the pumping stations to protect the electric pumps. The chain screen is specially designed for coarse screening of
sewage at the entrance of the plant. The filtration level is defined depending on the type and amount of material expected and according to the scheme of the purification process adopted. Thanks to the screen filter which consists of the fixed grid
bar, this machine is able to block the suspended solids (larger than the screen space), lifting them out of the water flow by means of the cleaning combs and convey them to discharge, placed at the top of the machine.
In the discharge area, a mechanical cleaning system, called counter cleaner comb, causes the fall of the material screened in a special collection box.

APPLICATIONS
• civil waste water treatment plants
• industrial waste water treatment plants
• tanneries
• industrial laundries
• slaughterhouses
• paper mill
• textile industry
• fish industry
• food and chemical industry

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