Separation and washing of grit
- Grit separators - SP
- Grit washers - PP
- Grit separators with integrated grit washer SP-PP
1. Grit separators - SP
The grit separator is one of the devices designed for coarse pre-treatment in waste water treatment plants, where it separates grit from sediment caught in grit chambers.
| Specification | |
| Capacity: Q | 5, 10, 15 l.s-1 of hydro-mixture |
| Efficiency of grit separation from organic material: (grit grains > 0.2 mm) | * up to 95% |
|
Consumption of wash water: (only for demand) |
0÷3 l.s-1 at 0.3 MPa |
| Diameter of conveyor screw: øD | 250 mm |
| Power input of conveyor screw: | 0.55 kW / 400 V / 50 Hz |
|
Power input of electromagnetic valve: (only for demand) |
60 VA, 230 V / 50 Hz |
| Operating conditions: | a) indoor |
| b) outdoor for temperatures ranging from -20 to +50 °C with heating unit of 1.54 kW / 220 V / 50 Hz | |
| * Depends on local conditions and the line of mechanical pre-treatment. | |
| Other parameter ranges need to be consulted with the manufacturer. | |
2. Grit washers - PP
The grit washer is designed for intensive grit washing and the removal of organic matters in grit. Grit washer is placed at a further stage after the grit separator. By intensive grit washing mostly all residual portion of organic substances are removed. The hydro-mixture in the grit chamber is first pumped into the grit separator. Here the initial rough separation of grit from the remaining solid phase is carried out. By subsequent washing the grit is rid of almost all the residual portion of organic substances.
| Specification | |
| Capacity: Q | up to 0.4 l.s-1 (=1.5 m3h-1) of washed grit |
|
Efficiency of grit separation from organic material: (grit grains > 0.2mm) |
97 - 99 % |
| Consumption of wash water: | 3 ÷ 5 l.s-1 of wash water at 0.3 MPa |
| Diameter of conveyor screw: øD | 250 mm |
| Power inputs: | conveyor screw 0.55 kW / 400 V / 50 Hz |
| washing 1.5 kW / 400 V / 50 Hz | |
| electromagnetic valve 60 VA, 230 V / 50 Hz | |
| Single cycle period: | period of hydro-mixture pumping + |
| period of hydro-mixture pumping + | |
| Operating conditions: | a) indoor |
| b) outdoor for temperatures ranging from -20 to +50 °C with heating unit of 1.54 to 2.0 kW / 220 V / 50 Hz | |
| Other parameter ranges need to be consulted with the manufacturer. | |
3. Grit separators with integrated grit washer - SP-PP
The grit separator combined with a grit washer is a device that combines the functions of both devices. The incoming mixture is retained in a whirling layer where the separating and washing processes take place thanks to centrifugal and gravitational forces. After settlement the grains of washed grit are pushed towards the outlet, lighter parts are carried to the overflow.
| Specification | ||
| Capacity: Q | 5, 10, 15, (20) l.s-1 hydro-mixture | |
|
Efficiency of grit separation from organic material: (grit grains > 0.2 mm) |
* 90 - 97% | |
| Consumption of wash water: | 3 ÷ 5 l.s-1 of wash water at 0.3 MPa | |
| Diameter of conveyor screw: FD | 250 mm | |
| Power inputs: | conveyor screw 0.55 kW / 400 V / 50 Hz | |
| washing 1.5 kW / 400 V / 50 Hz | ||
| electromagnetic valve 60 VA, 230 V | ||
| Single cycle period: | period of hydro-mixture pumping + | |
| + approx.10mins wash water | ||
| Operating conditions: | a) indoor | |
| b) outdoor for temperatures ranging from -20 to +50 °C with heating unit of 1.54 to 2.0 kW / 220 V / 50 Hz | ||
| * Depends on local conditions and the line of mechanical pre-treatment. | ||
| Other parameter ranges need to be consulted with the manufacturer. | ||
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