What is clariflocculation?

Clariflocculation is a combination of flocculation and clarification in a single tank. The equipment used for this process is the clariflocculator.

The clariflocculator is a system containing two concentric tanks:

  • inside as a flocculation basin
  • outdoor clarifier

Clarifloculation process

It is a necessary process to treat water with a high content of suspended solids and other contaminating substances.

  • In a clariflocculator, the water enters the flocculation tank where the paddles bring in a stirring
  • this stirring will then create more flocs
  • when these flocs settle to the bottom, the liquid flows radially upwards into the clarificator area
  • the clarified liquid is then discharged through a peripheral weir into the peripheral washer
  • the sedimented sludge is then raked to the bottom of the central weir. Once there, it is transferred to the sludge chamber and discharged.

This equipment will then be used in larger installations.

Clariflocculator design

To optimize clariflocculator design, it is important that we have access to information such as :

  • Turbidity
  • MY
  • Appearance and colour of the water to be treated
  • Daily consumption
  • Instantaneous flow rate of the installation,
  • Type of application
  • Other physico-chemical characteristics (pH, water temperature, salinity).

So we can suggest the clariflocculator that will meet all your expectations.

1h2o3 clarifloculators

The 1h2o3 clariflocculator is the perfect combination of equipment supporting several process combinations, including :

  • neutralization
  • coagulation
  • flocculation
  • lamella settling.
CFC.DLC container version full options 1h2o3
Compact Clariflocculator with all options

Specific advantages of 1h2o3 clarifloculators

  • Custom-built: We manufacture all our clarifloculators specifically to suit your needs. These include:
    • position and type of inputs/outputs
    • volumes of neutralization/coagulation/flocculation tanks.
  • Highly resistant: Our clarifloculators are made of corrosion-resistant polypropylene and can withstand the full pH range.
  • Drinking water compliance: Some countries require specific materials for drinking water applications (NSF-61, ACS, DVGW, SVGW, etc.). We can adapt the materials of our clariflocculators to meet your specific regulations.
  • Internal bypass: when the volume is divided into two sections, each section can be isolated separately by means of an internal bypass device (except CFC.DLC).
  • 3 installation modes: thanks to the thickness of the polypropylene walls, the tanks can be installed completely either:
    • completely buried
    • partially buried
    • just on a slab
  • Outdoor use: to save space in the factory, the tanks can be equipped with non-slip covers and their walls reinforced with an anti-UV treatment
  • Eco-design: Unlike fiberglass, all materials used in our equipment are 100% recyclable.
  • Specific industrial applications: triple-skin tanks, high-temperature fluids, etc. Anything is possible, just ask us!
  • Lamella thickness: while many suppliers offer lamellas with a thickness <1,5 mm, Our lamellas are 3 mm thick. This thickness makes the structure much more resistant to clogging due to lack of maintenance and prevents the risk of collapse.
  • Separate collection of floating sludge: our twin weir channel makes it possible to collect them separately:
    • settled water: treated water
    • floating sludge: the fraction floating on the surface of lamellar decanters which, if not collected separately, reduces the elimination yields for TSS, COD and BOD5.

FAQ

What is the difference between simple clarification and clariflocculation?

Simple clarification aims to separate suspended solids by settling or flotation, without any prior chemical step. On the other hand, clariflocculation combines coagulation, flocculation and clarification in the same device. This combination transforms unstable colloids into dense flocs, which settle faster. The result: better performance on loaded effluents, such as those from the food or wine industry, and space savings thanks to more compact installations.

It is recommended when the effluent contains a high suspended solids load or has variable turbidity. This is the case for industrial wastewater (wines, milks, textiles), process water and highly charged surface water. Thanks to coagulation-flocculation, decantability is improved and fouling of the following steps (filters, membranes) is limited. It is also useful before tertiary treatment or water reuse (REUT).

The choice is usually made via a jar test, which simulates the processing conditions in the laboratory. Different doses of coagulants (iron or aluminum salts) and flocculants (polymers) are tested to evaluate their effectiveness on turbidity, sedimentation and sludge volume. This test makes it possible to calibrate the treatment according to the characteristics of the raw water (pH, temperature, colloidal load) and to optimize the cost-effectiveness ratio.

Yes, it fits perfectly into a REUT course. It effectively removes particles and reduces turbidity, making it easier to operate tertiary treatments such as sand filters, ultrafiltration or UV disinfection. By stabilizing water quality upstream, it improves health safety and helps to comply with reuse standards, particularly for irrigation or industrial uses.

This type of equipment, often used in large plants, ensures a slow and homogeneous mixing, ideal for floc formation. Its peripheral configuration limits mechanical wear, reduces energy consumption and facilitates maintenance. It is suitable for high flow rates and can integrate sludge scraping and floating collection systems, providing a robust and efficient solution for continuous and demanding treatments.

Design your clariflocculator here
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