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Grease Separator Wastewater Line Depurbasic EN 1825

The grease separator of the DEPURBASIC line model DED marked EN 1825 is a component of a treatment system where wastewater discharges converge.

The grease separator of the DEPURBASIC line model DED marked EN 1825 is a component of a treatment system where gray water discharges, i.e., from kitchens, laundries, showers, and restrooms, converge. Its main function is to separate fats, soaps, and food waste contained in domestic and/or assimilated wastewater.

The DED model grease separator indeed helps to limit clogging issues in the pipes leading to the sewage system for both local and remote wastewater, but above all, it allows for the reduction of a portion of the pollutant load contained in this type of effluent.

Grease separators can be made of concrete, plastic, or fiberglass and must be sized based on the number of equivalent inhabitants that discharge into them.
The calculation coefficient for their sizing is typically set for good practice at 0.050 mc per equivalent inhabitant. The wastewater coming from the grease separator, before flowing into either the public sewer or the installed secondary system, may be combined with black water from sanitary facilities, downstream of biological tanks – Imhoff-type tanks, depending on design requirements.

Each grease separator must undergo periodic maintenance consisting of emptying and cleaning. This is carried out, as with biological tanks, by specialized vacuum truck companies authorized to transport domestic discharges and to deliver them to public treatment plants.
Grease separators are part of condominium services, and the cost of their maintenance and management is shared among those who benefit from them according to criteria established by the condominium assembly.

Good Usage Practices

The grease separator of the DEPURBASIC line should be installed as a primary treatment upstream of an active sludge treatment plant of the DEPURBASIC line and all our other product lines, ATLAS, BIOWATER with BIOROCK technology, BIOKLEAN, etc., in residential buildings and/or construction interventions that discharge wastewater into public sewers, surface water bodies, and/or soil as permitted by law d.lgs. 152/06 and subsequent amendments and regional regulations.

For the complete treatment of wastewater following the DED model grease separators of the DEPURBASIC line, appropriate secondary treatments must be installed, such as phytodepuration systems, aerobic percolating filter treatment plants, anaerobic percolating filter treatment plants, active sludge treatment plants, or treatment systems defined as appropriate by Legislative Decree 152/06 such as subsurface irrigation, leach pit, and/or drainage trench.

The DED model grease separator of the DEPURBASIC line should, for good practice, be installed as close as possible to the discharge points of gray water. This will ensure that the pipes leading to either the public sewer or the treatment plant remain clean and unclogged by the pollutants contained in the wastewater.

It is always advisable to size the grease separator with at least 0.050 mc per equivalent inhabitant for domestic uses and at least 0.10 mc per equivalent inhabitant for assimilated uses as indicated below.

For the construction of the grease separator, it is advisable to use materials that remain waterproof over time (high-density polyethylene, fiberglass, and/or waterproofed concrete) to avoid infiltration phenomena near the foundations of buildings.
It is noted that rainwater must not be discharged into the DED model grease separator of the DEPURBASIC line.

Fields of Application

The professional grease separator model DED of the DEPURBASIC line is particularly useful in assimilated user types such as restaurants, agritourisms, hotels, laundries, and all activities assimilated or not to domestic use but that involve the use of degreasing detergents necessary for cleaning oils and fats produced by normal human activity.

In installations serving receptive uses such as restaurants and hotels, it is always recommended to install a grease accumulation tank in parallel with the grease separator to accumulate a larger quantity of saponified fats and oils.

Regulatory References

The grease separator is indicated as a pre-treatment plant element by Legislative Decree 152/06 and reported in various regional regulations, to be used together with other systems necessary to reduce the pollutant load of wastewater and to return it to the environment as purified as possible.

 

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Maintenance

To optimize the operation of this plant element, periodic maintenance is necessary for the removal of sediment that settles inside the dedicated compartment.

The so-called "crust" that forms inside the grease separator can prevent water from draining properly and cause clogging phenomena in the pipes.
Furthermore, the malfunctioning of the grease treatment system can cause anomalies in any wastewater treatment system installed downstream of it, such as phytodepuration, percolating filter, active sludge treatment plant, etc.

Periodic maintenance operations must be carried out by vacuum truck companies that will then have to dispose of the waste either at a landfill or at a public treatment plant.