Marie Polyester - Producent oczyszczalni, szamb , toalet

1.The main element of a household- adjacent sewage treatment plant in which the first stage of sewage treatment occurs (mechanical-biological stage) – the current settling tank, usually referred to as putrefactive.

Putrefactive settling  “Marie” tanks are monolithic reservoirs in the shape of  a tank, made from material strengthened with fiberglass (glass-polyester laminate) and divided into chambers.  Higher number of chambers enlarges the sewage flow channel, additionally slowing the flow and making the process of residue creation more efficient (more effective sedimentation). Additionally each chamber increases the rigidity of the structure. Higher number of chambers increases the efficiency of sewage treatment. At lower capacities a double-chambered settling tank is sufficient, at higher ones it is better to use triple-chambered tanks. In the last chamber of the settling tank there is a filter filled up with pozzolana, protecting the drainage from the refuse. The settling tank is equipped with hatches with lids, allowing for the removal of residue, and a decompression opening for diverting gases from the fermentation process.

MARIE SETTLING TANKS ARE PRODUCED IN MULTI-CHAMBERED VERSIONS

MARIE putrefactive settling tank with capacity of 2500 liters divided into two chambers



MARIE putrefactive settling tank with capacity of 3500 liters, produced in two versions – double- and triple-chambered



MARIE putrefactive settling tank with capacity of 7500 liters, produced in two versions – double- and triple-chambered



In the putrefactive settling tank occur anaerobic processes of decomposition of organic substance and gravitational separation of particles. As a result of sedimentation the heavier particles settle, forming refuse. This refuse ferments, in which process the soluble and insoluble substances are decomposed. Lighter particles go up to the surface of the liquid forming the so called ‘skin’. Before the next stage of treatment the sewage is additionally clarified in the filter.

Optimal conditions for sewage treatment in the settling tank occur when:
•    the sewage stays in the reservoir for 72 hours
•    required time of refuse fermentation is 180 days at minimum

Sewage, after passing through the settling tank, before further biological treatment, is directed to the distribution drain.
MARIE sewage treatment plant is equipped with a distribution drain, forming the opening of the seepage drainage, designed for even distribution of the sewage treated in the first stage into separate drainage channels. It also allows for periodic inspection ensuring proper functioning of the system.


The second stage of biological treatment consists of aerobic processes of biological decomposition of the remaining pollutants in the sewage. During the biological treatment additional physical and chemical reactions occur. The adsorption of the sewage on soil particles results in the development of microorganisms creating the so called ‘biological membrane’. Microorganisms decompose organic pollutants, while the chemical processes of inorganic pollutants precipitation occur in the soil. Those processes usually occur in the seepage drainage.

2.The seepage drainage in the Marie treatment plant is formed of drainage pipes with a system of grooves. Lines of drainage pipes are placed in ditches 50 to 80 centimeters in width ridged with gravel (16-32 mm. granulation) separated from the soil with geofibre. The drainage ends with ventilation pipes, so called chimneys.

The drainage must be of length proportionate to the quantity of sewage and the permeability of soil, and the number of occupants (12 running meters per 1 user is assumed). It can be used on permeable soil if a distance of at least 1,5 m. is kept between the drainage pipes and the level of subsoil waters, as well as other minimal distances, such as:
2m. from the border of the estate or road
5m. from a dwelling house
30m. from a well – source of drinking water
1,5m. from gas or water pipes
0,8m. from electric cables
3,0m. from trees and bushes
If the level of subsoil waters is high the drainage may be laid upon a sand elevation with the use of a pump for directing the sewage into the drainage.