upward type sandfilter

■ APPLICATION

- Tertiary treatment for municipal sewage treatment plant

- Tertiary treatment for Industrial waste water treatment plant

- Tertiary treatment for water treatment plant and Industrial water

■ ADVANTAGES

- Continuous operation and cleaning

- High filtration efficiency

- External airlift for better accessibility

- Efficient final rinse of sand into the isolation box

- Minimum energy and maintenance cost

- No backwash material required

APPLICATION

INLET RAW WATER

OUTLET FILTRATES

Tertiary treatment SS

30/70 MG/L

SS < 5 MG/L

Phosphorous removal

P 2-5 MG/L

P < 0.5 MG/L

Potable water

2-10 NTU

< 0.5 MG/L

Recirculation of process water

SS 40-100 MG/L

SS 5 < 0.5 MG/L

Paper mill waste treatment

SS 5-80 MG/L

SS 1 < 0.5 MG/L

Metal finishing wasting treatment

SS 20-180 MG/L

SS < 5 MG/L

Oily waste

10-30 MG/L

HC 1-10 MG/L HC

■ DESCRIPTION OF OPERATION

Raw influent is fed into the base of the sand filled, cone bottomed filter. The flow then rises through the sand so that clean effluent is discharged over the upper weir. The rising flow of the effluent is distributed evenly over the whole cross section of the filter by means of a radial grating system. The contaminated sand falls continouously to the bottom cone outlet from where it is transferred by an external airlift to the wash chamber at the top of the unit. Final backwashing of the sand is then performed by a counter current of clean waterbefore returning to the sand bed in the isolation box. The dirty wash water is discharged over the lower weir for disposal.

 MODEL

FILTRATION

AREA(㎡)

Capacity

(㎥ /hr)

DIAMETER

(m)

TOTAL HEIGHT(mm)

REQUIREMENT

(N㎥/hr at 4bar)

REJECT

FLOW

SINGLE BED

DOUBLE BED

TES 07

0.70

5~10

0.95

3,260

4,260

1.5

2~12 %

TES 16

1.60

10~20

1.45

4,210

5,210

2.0

2~12 %

TES 30

2.90

20~30

1.95

4,650

5,650

5.5

2~12 %

TES 50

5.10

40~50

2.65

5,335

6,335

10.0

2~12 %

TES 60

6.00

50~60

2.75

5,860

6,360

12

2~12 %