Use

Secondary treatment of residential black water with drain into the

ground according to Table 4, Legislative Decree 152/06, Annex 5.

The phytopurification plant is a complete system for drain into

the ground composed of Imhoff and a sandwich of sheets for the

phytopurification basin.

Operation

Phytopurification is a system of natural purification of domestic,

agricultural and industrial wastewater, which reproduces the

typical self-purification principle of aquatic environments and

wetlands.

Purification is carried out through the combined action between

the permeable substrate, plants, wastewater and microorganisms.

The mechanisms of removal of pollutants (organic matter,

nitrogen, phosphorus and pathogens) are similar to those of

trickling filters, and are physical, chemical and biological.

The wastewater coming from utilities are

first conveyed into the

Imhoff tank where, thanks to the sedimentation system present,

there is the first removal of all those substances, which due to

their specific weight tend to sediment in the water. Sedimented

substances will be conveyed to the digesting compartment

below, where they will undergo digestion by anaerobic bacteria.

The waters coming out of the Imhoff through the inlet tank are

distributed to the basin; downstream of the basin there is an

outlet tank complete with overflow created in such a way that the

wastewater is retained in the basin and any excess water, mainly

due to weather events, is disposed of due to the overflow.

Maintenance

For the correct management of Fito and to achieve the required

purification results, please follow these guidelines:

•

Ensure the good health of vegetation planted;

•

Regularly inspect the purifying chain components to check that

there is no gross material received accidentally to clog the pipes;

•

Regularly clean the Fito pipes;

•

Regularly empty the Imhoff tank. The removal of sludge must be

carried out by a specialized company;

•

As provided for by the Consolidated Act on Water (Legislative

Decree 152/06 as amended), and suggested by the normal

hygiene practice, periodically inspect and wash the inspection

well.

Specification Item

A complete system composed of 1 Imhoff tank and phytopurification

basin suitable for treating domestic wastewater and confluent into

surface water or soil designed considering an area of phytopurification

of 5 m

2

per Population Equivalent. The phytopurification system is

composed of 1 Imhoff tank made of 100% recyclable polyethylene,

complete with wastewater inlet and outlet system and maintenance

lid; 1 phytopurification basin composed of sandwich waterproof

sheeting which is resistant to laying on various types of ground,

complete with electro-welded sheath for the insertion of the

wastewater inlet and outlet piping and guaranteeing the perfect

hydraulic seal. The plant is also complete with perforated pipes for

distribution of the wastewater, non-woven fabric and two wells that

guarantee a constant hydraulic head inside the basin.

RESIDENTIAL WASTEWATER

SECONDARY TREATMENT - DRAIN TO THE GROUND

PROJECT PARAMETERS

Basin area

m

2

/a.e.

5

1

2

3

1

2

3

Figure 9

Plant for domestic use, drain into the ground composed of the DG, IMHOFF, 1) FITO models

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