AKHELEC

Large volumes of water polluted with hydrocarbons: what solutions?

aerial view of a filtration center

High- flow filtration of water polluted with hydrocarbons is a crucial issue for many companies.

Find out about the different laws governing the management of water pollution risks, as well as the FILTRELEC ECODESIGN® F1500 high flow hydrocarbon filter.

Reminder on the legislation: what does the Clean Water Act say?

There are 3 main laws to fight against the phenomenon of water pollution:

  • The 1964 law makes it possible to provide drinking water to all French people, while allowing industries and agriculture to have the quantity necessary for their operation. It concerns all the waters present in the territory, with the exception of mineral waters. 
  • The 1992 law aims in particular to protect and control water quality, preserve aquatic ecosystems, as well as develop and enhance the country’s water resources. Water is thus qualified as “the nation’s common heritage”.  
  • Finally, the law on water and aquatic environments (or LEMA) of 2006 provides new tools to fight against diffuse pollution of waters. In particular, it specifies the prohibition on dumping polluting products such as lubricants and oils. Criteria for the concentration of hydrocarbons in the water must also be observed.

These water laws are associated with 2 standards and directives:

  • The REACH standard helps provide a legislative framework for the manufacture and use of chemicals across Europe.  
  • The RoHS directive aims to limit the use of lead, mercury, cadmium, hexavalent chromium, polybromobiphenyls (PBP), and polybrominated diphenyl ethers (PBDE). These products are indeed dangerous for humans and for the environment.  

Thus, the various laws on water imply an active engagement of companies, and therefore consequently adapted solutions to protect this natural resource as well as the environment.

Filtration of large volumes of water polluted with hydrocarbons and dielectrics

Aquatic environments known as “rainwater receptors” such as watercourses or subsoils are liable to be contaminated by various chemical substances. This is why it is necessary to set up efficient filtration solutions with a sufficient flow rate to avoid environmental degradation. Thus, in order to treat storm water runoff contaminated by hydrocarbons and dielectrics, two main pieces of equipment are necessary:

  • The oil separators can trap by a system of filtration by gravity filter insoluble liquids in water with a density less than or equal to 0.95g / cm3. On the one hand, class 1 separators allow filtration by coalescence with a maximum residual quantity of hydrocarbons of 5 mg per litre of water under ideal maintenance, temperature and precipitation conditions. The discharge of this water is done either on a natural network or on a network which does not have a treatment plant. On the other hand, class 2 separators allow gravity filtration with a maximum residual quantity of hydrocarbons of 100 mg per litre of water. The discharge of this water is mainly done on a collective network with a purification station. 
  • Dielectric filtration systems in the form of filter cartridges composed of oleophilic media. They make possible to trap oils and obtain water with a residual amount of hydrocarbons of 1 to 5 mg / L. The F1500 filtration system can also be placed downstream of an existing gravity separator to maximize filter life and limit maintenance operations.   

The FILTRELEC ECODESIGN® F1500 high flow hydrocarbon filter

f1500 filtration system

Thanks to its high flow filtration system, the FILTRELEC F1500 continuously filters and evacuates water polluted with hydrocarbons and dielectrics in order to prevent soil pollution. Its high filtration rate of 1500L / min therefore adapts perfectly to large quantities of oily water. The water recovered at the outlet of the system has a maximum residual hydrocarbon content of 5 mg / L, in accordance with the criteria of the water law.

On the design side, the high flow hydrocarbon filter is integrated in a concrete manhole or in a metal casing. The system also has a pre-filter and absorbent media packaged directly into the filter.

The latter has a safety device in the event of a major oil leak to ensure environmental protection. System maintenance is reduced and a refill kit allows replacement of the pre-filter and absorbent media. The FILTRELEC F1500 casing can therefore be reused. This system thus makes it possible to minimize the costs, work and maintenance associated with the treatment of polluted water. 

Finally, concerning the installation, our design office is responsible for providing you with a complete solution for the treatment of your polluted water.

Learn more about the F1500 solution

Contact us for more information

To preserve the environment in accordance with the Water Law and at a limited cost, contact us quickly !  

Our teams are at your disposal to answer all your questions about our high flow hydrocarbon filter and other solutions.