Use

A treatment system for car washing equipment characterized

by the presence of pollutants such as suspended solids, oils,

hydrocarbons and detergents, suitable for the drain in the limits of

Tab. 3, Legislative Decree 152/06, Annex 5, drainage into surface

water.

Operation

The wastewater from manual car washing is

first conveyed to the

sedimentation tank where sedimentable materials are withheld,

and are then sent to the oil separation section where the oils and

hydrocarbons are withheld. The water then will be conveyed into

the biological system consisting of an anaerobic percolating filter

followed by air blown percolating filter with sludge recirculation.

In the biological phase thanks to the presence of specific

bacterial strains (PAO, Phosphorus Accumulating Organism) the

phosphorus in the wastewater can be destroyed.

Maintenance

Sedimentation tank/grease trap maintenance

You are advised to check every two months the amount of sludge

in the sedimentation tank/grease trap and if necessary remove it.

Grease separator maintenance

Every two months check the volume of separated oils and

hydrocarbons and remove them at least every six months.

Remove and clean the coalescing filter at least every six months.

Maintenance of the anaerobic filter

Check for blockages in the pipes and drain sludge once every 6

months

Maintenance of the air blown percolating

filter

Regularly check that no anomalies have occurred to the electrical

panel if present.

Verify that the blower works properly, that is, movement must be

observed in the volume of oxidation coinciding with the operating

time.

Every six months carry out the removal of excess sludge. Such

removal must be carried out by a specialized company. Check the

functioning of the airlift blower controlling that water and sludge

arrives in anaerobic percolator filter.

Specification Item

A biological purification system for water coming from car

washing equipment drained into surface water.

The water treatment system from the car washes in question is

composed of:

CAR WASHES

COMPLETE PLANT - DRAIN TO WATERCOURSES

•

1 sedimentation tank/grease trap 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

and suitable for the insertion of extensions, inlet and outlet

system of wastewater and relative gaskets that guarantee

perfect tightness;

•

1 grease separator/sand trap with coalescing filter suitable to

separate by gravity the non-emulsified oil/hydrocarbons lighter

than 0.85 g/cm

3

from the wastewater drained through static

separation and coalescing filtration with efficiency increased by

95%. The grease separators/sand traps are constructed with a

corrugated container for underground resistance and complete

with walkable ribbed maintenance lid both made of 100%

recyclable polyethylene with rotational moulding technology.

The grease separators/sand traps are complete with walkable

inspection manhole and suitable for the insertion of extensions,

a coalescing filter with its stainless steel grid filter which is easily

removable for cleaning operations, inlet and outlet system of

wastewater and related seal, which ensure the perfect tightness;

•

1 “FAN anaerobic percolating filter” biological purification

system constructed with a corrugated container for greater

underground resistance and made of 100% recyclable

polyethylene with rotational moulding technology. The

anaerobic percolating filter biological treatment plants come

complete with walkable inspection manhole and are suitable

for the insertion of extensions, perforated input pipe to ensure

a distributed percolation across the entire surface of the filter,

random fill media in polypropylene with a specific surface of

120m

2

/m

3

, inlet and outlet system of wastewater and relevant

seals that guarantee a perfect tightness;

•

1 “air blown percolating filter” biological purification system

constructed with a corrugated container for greater underground

resistance and made of 100% recyclable polyethylene with

rotational moulding technology. The anaerobic percolating

filter biological treatment plants come complete with walkable

inspection manhole and are suitable for the insertion of

extensions, compressor, non-clogging tubular diffuser, random

fill media in polypropylene with a specific surface of 120m

2

/m

3

,

inlet and outlet system of wastewater and relevant seals that

guarantee a perfect tightness.

•

1 compressor for the recirculation of sludge to the anaerobic

percolator upstream and relative piping for recirculation.

Figure 13

Complete car wash systems with drainage into surface water

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