METRIA PureFlow 6 domestic sewage treatment plant

METRIA PureFlow 6 domestic biological sewage treatment plant with a capacity of 3000L, designed for up to 6 people.

Technical specifications

The METRIA PureFlow wastewater treatment plant is an ideal solution for households without access to a sewer system. Its simple design and proven technology ensure years of trouble-free operation.

This is a mechanical-biological wastewater treatment plant. Its four-chamber design produces approximately 97% purified wastewater. The use of activated sludge technology without controllers or solenoid valves allows for manual control of the unit’s operation and, in emergency situations, for a temporary increase in treatment capacity. The PureFlow product complies with the PN-EN 12566-3:2005+ A2:2013 standard. The METRIA PureFlow 6 domestic wastewater treatment plant is also CE certified. The tanks are manufactured from high-quality PEHD plastic using rotomoulding – a plastic forming technique where the rotomoulding mold is divided into two or more parts, filled with plastic powder or granulate, and then placed in an oven, where the powder transforms into a liquid state. The rotating mold creates a monolithic tank with uniform, thick walls. The vertical design of the treatment plant also saves significant space and facilitates proper oxygenation of the wastewater.

TREATMENT PLANT DIAGRAM:

1. Chamber 1 – primary sedimentation tank

2. Chamber No. 2 – biological reactor

3. Chamber No. 3 – Imhoff’s funnel

4. Chamber no. 4 – secondary settling tank

5. Control module

6. Mammoth Pump

7. Mammoth recirculation pump

8. Aeration diffuser

9. Sediment tank covers

10. Raw sewage inlet DN160

11. Treated sewage outlet DN110

The treatment plant utilizes activated sludge technology. The biological reactor contains low-load activated sludge, which consists of aerobic bacteria concentrated in so-called sludge flocs. Thanks to intensive oxygenation, the bacteria have enough oxygen to effectively reduce pollutants contained in the wastewater.

PureFlow is a four-chamber treatment plant with two secondary settling tanks and a sludge return system, guaranteeing a high level of pollution reduction.

Description of the PureFlow treatment plant operation:

Phase I – raw sewage inflow:

The incoming wastewater is mechanically pre-treated, with sediment settling to the bottom and fats rising to the top. This also allows for uniform treatment of each batch. The wastewater then flows through the siphon into the biological reactor due to differences in liquid levels.

Phase II – aeration in the biological reactor:

Mechanically treated wastewater is intensively aerated in the reactor. Contact with oxygen allows for the growth of bacteria, which reduce contaminants contained in the wastewater. At the same time, thanks to the appropriate valve settings, a buffer is created in the reactor, meaning that up to a certain point, more wastewater flows out than is recycled from the Imhoff funnel, where it is then transferred in the next stage.

Phase III – Imhoff funnel deposition:

Through a process called sedimentation, excess sludge is collected in the lower part of the hopper. From there, it is returned to the biological reactor via an air pump (mammoth). Excess liquid flows to the secondary settling tank.

Phase IV – final clarification and discharge of treated wastewater:

Wastewater that flowed out of the Imhoff hopper in the previous phase is removed from the secondary settling tank, removing any remaining suspended solids and nitrogen compounds. It then leaves the treatment plant by gravity or pumping and flows into the receiving water.

Advantages of the PureFlow treatment plant:

– The treatment plants are manufactured in compliance with PN-EN 12566-3:2005+A2:2013 and CE certified.

– The tank is made of PEHD (polyethylene) resistant to aggressive environments, while the heavily ribbed design guarantees resistance to ground pressure.

– Small installation footprint – all treatment processes take place inside the tank, so treated wastewater can be discharged into a ditch, pond, river, or infiltrated into the ground via a soakaway well.

– Very long service life and reliability – simple construction of the flow-through wastewater treatment technology.

– Even and stable wastewater treatment, resulting in higher pollutant reduction.

– Low electricity consumption – the entire treatment plant consumes approximately 0.6 kWh/d.

– Low operating costs – sludge removal only every 12–24 months.

– Stable operation regardless of the season.

– Fully automated operation.

– 30-year warranty on the tank, 2-year warranty on the equipment.

The treatment plant includes:

– Metria PureFlow treatment plant tank – 1 pc.

– Cover with control – 1 pc.

– DN 600 H-0.5m extensions – 3 pcs.

– DN 600 cover – 2 pcs.

Possibility of retrofitting the treatment plant with an infiltration system:

– absorbent well

– biohydrophyte flowerbed

– drainage

Extensions available for the tank:

– DN 600, height 50 cm and 100 cm

For safe operation, a fuse box must be installed.

Installation nationwide by professional teams – arranged individually.

Have questions? Call us, and we will advise you on the optimal solution.