Wastewater Treatment Expertise

Wastewater processing involves several steps and technologies to remove solids and separate water from sludge. Chemifloc has unrivalled experience in selecting the optimum chemistries required for a particular waste stream.

Sludge Dewatering: Sludge refers to the solid material generated during the wastewater treatment process. Sludge dewatering is the process of removing water from the sludge to reduce its volume and make it easier to handle and dispose of.

Cationic Polymer Powder: Cationic polymers are chemicals added to wastewater during the dewatering process. These polymers, with a positive charge, act as flocculants. They help bind fine particles together, forming larger flocs that settle more easily and improve the efficiency of solid-liquid separation. Check out our SNF Flopam range of wastewater polyelectrolytes.

Anionic Polymer Emulsion: In contrast to cationic polymers, anionic polymers carry a negative charge and are also used as flocculants in wastewater treatment. Anionic polymer emulsion, a polymer form mixed with water to create a stable emulsion, is commonly employed to enhance solid-liquid separation in the dewatering process.

Once the selected flocculant and polymer have been applied and coagulation and flocculation have been initiated, it’s time to separate the liquids and solids. Several methods can be used depending on the nature of the suspended solids:

  1. Screw Press: A screw press is a mechanical device utilised in sludge dewatering. It consists of a rotating screw inside a cylindrical screen. As the sludge is fed into the press, the screw gradually moves it along the length of the press. The pressure applied by the screw helps to separate the water from the sludge, allowing it to pass through the screen while retaining the solids.
  2. Belt Press: Also known as a belt filter press, a belt press is another dewatering technology. It involves passing the sludge between two porous belts that exert pressure to squeeze out the water. The continuous movement of the belts enables efficient dewatering.
  3. Gravity Belt: A gravity belt thickener is a device used to thicken sludge by allowing it to settle under gravity on a porous belt. As the sludge travels on the belt, excess water drains through, resulting in thickened sludge. Gravity belt thickening is typically employed before dewatering processes like belt press or centrifuge to reduce the sludge volume.
  4. Drum Thickener: Also known as a rotary drum thickener, a drum thickener is another method of thickening sludge. In this process, sludge is introduced onto a rotating drum, and under gravity, water drains through the drum’s pores. The remaining thickened sludge is scraped off the drum’s surface.

Contact Chemifloc to discuss your chemical needs, receive expert advice, and explore how our comprehensive solutions can elevate your wastewater processing operations. Trust us to deliver effective and sustainable solutions that meet your unique requirements.

Chemilab creative services

Chemilab conducts research and development for new products and provides essential services to optimise treatment processes for high-quality drinking water.

Troubleshooting and problem-solving services can be provided to plants experiencing difficulties in meeting treatment requirements.

Chemilab also offers lead mitigation services using its four dedicated lead rigs and provides additional services such as on-site visits, pump calibration, and drop tests.

Our Products

Chemifloc offers an extensive range of chemical products in the following categories:


Our chemicals are added to water to form aluminium or iron precipitates. These absorb impurities in the water as they form, functioning to clean the water supply of contaminants.

Potable (Drinking)
Water Polyelectrolytes

Potable polyelectrolytes are chemical flocculants used in the conditioning/ thickening of the sludge line in potable drinking water treatment. They help floc formation and removal.


Polyelectrolytes are chemical flocculants used in the conditioning/ thickening of the sludge line in wastewater treatment.


Chemifloc provide a wide range of general chemical products, including aluminium sulphate, ferric sulphate, sodium hypochlorite and fluoride.

How can we help?

If you are interested in knowing more about ourproducts and services, please contact us.