Use

Rainwater treatment system.

Sand traps suitable to treat the flow rate equivalent to rainwater

(5.5 l/s x 1000 m

2

and 2.75 l/s x 1000 m

2

for covered yards)

separating sedimentable inert materials (sands) from the

wastewater.

Operation

The wastewater from the drainage network is conveyed into the

DIS sand trap.

The sedimentation of heavy insoluble substances takes place

inside DIS.

Maintenance

To maintain proper operation of the plant the level of the inert

material in the sand trap must be checked every six months. If

an excessive amount of sludge (inert) is found in the sludge trap,

proceed to its removal.

COVERED AND UNCOVERED PAVED AREAS

PRIMARY TREATMENT

Specification Item

The sand traps are constructed with a corrugated container for

greater underground resistance and made of 100% recyclable

polyethylene with rotational moulding technology. The sand traps are

complete with walkable inspection manhole, inlet and outlet system

of wastewater and relative gaskets that guarantee perfect tightness.

The product must be made by a certified company according to UNI

EN ISO 9001:2008

The plant has been designed according to the following parameters:

Hydraulic retention time

> 7min

Rain flow on uncovered surfaces

5,5 l/s x 1000 m

2

Rain flow on covered surfaces

2,75 l/s x 1000 m

2

55

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