**Hydrex organic coagulants are made from a renewable source of tree bark. Among other benefits they are a more efficient and more environmentally friendly alternative to traditional metal-based polymers commonly used in industrial wastewater treatment and particularly good fit for oily effluents, such as food and beverage and oil and gas** [CONTATTACI PER SCOPRIRE COME POSSIAMO SUPPORTARTI](https://www.veoliawatertechnologies.it/contattaci-web2lead) Coagulation is commonly used, in combination with flocculation, in effluent treatment to remove suspended solids and insoluble contaminants in an effective manner. If metal-based coagulants (such as Polyaluminum chloride (PAC) or Ferric chloride) are the substances traditionally used, they have the disadvantage of being impactful on water treated pH and they are causing high production wastewater sludge volumes. In addition their use is increasingly restricted by regulations. Specially formulated to counter these drawbacks, the Hydrex 6799, 6861 and 6862 vegetal -based coagulants are the easy, green and cost saving choice for customers willing to replace their inorganic chemicals.  ## Benefits  **Up to 50% less sludge production with cheaper and greener sludge disposal** Hydrex vegetal-based coagulants produce up to 50% less sludge than metal-based coagulants, reducing the costs and carbon footprint of disposal. Organic and biodegradable, they allow for more sustainable and less costly disposal options like composting or land application (depending local regulatory constraints).  **Savings on Total cost of operation** Vegetal-based coagulants don’t decrease pH like metal-based coagulants, meaning that no or less caustic soda is needed for pH correction before flocculation. Polymer dosing is also reduced in flocculation. It means the operating costs associated with these products are also reduced.  **Performance improvement** Free from metal salts, Hydrex vegetal-based coagulants are not corrosive for the metallic parts of the plant . They remove suspended solids and COD more efficiently while the produced sludge composition is better for recovery and biogas production.  **Chemical consumptions reduction** Chemical dosage is reduced by 3 to 5 times compared to inorganic chemicals for the same treatment results. This means even greater cost savings and efficiency.  **Improved Health & Safety** Non toxic, safer handling for operators ## Discover how we help reduce sludge production and chemicals dosing [CONTATTA UN ESPERTO](https://www.veoliawatertechnologies.it/contattaci-web2lead) ## Applications Hydrex™ organic coagulants are suitable for any type of industry, especially those that generate effluents with high oil and fat content: - **[Food & Beverage](/en/core-markets/food-beverage "Food and Beverage ")** (ready meals, sauces, cookie factories, food processing...). - **[Oil & Gas](/en/core-markets/oil-gas-downstream "Downstream Oil & Gas")** (oil processing and refining units) - **[Physico-chemical treatment](/en/applications/wastewater "Wastewater")** in WWTPs - **[WWTP with problems in the compliance of chloride discharge](/en/applications/wastewater "Wastewater")** (due to the use of inorganic coagulants). ## Case study A large refining site in Europe producing 11millions T/y of crude oil, was experiencing bad performance of their wastewater treatment (250m3/h). Hydrex solutions included a switch from traditional metal-based coagulants (130 T/y of FeCl3) to vegetal-based coagulants Hydrex 6799.  #### The numbers speak for themselves in terms of customer benefits :     [CONTATTA UN ESPERTO](https://www.veoliawatertechnologies.it/contattaci-web2lead) ## Resources [PDF Plant-Based Coagulants for Wastewater Treatment (330.1 KB) ](/sites/g/files/dvc2471/files/document/2025/04/DS%20WTC%20Hydrex%206000%20Series%20Plant-Based%20Coagulants%200424%20EN.pdf) If you can’t find exactly what you are looking for, please [contact us](https://www.veoliawatertechnologies.com/en/contact) for further assistance.