• Customer: Cedrob S.A.
• Industry: Poultry Slaughterhouse
• Location: Ujazdówek (near Ciechanów), Poland
• Design Flow – Phase 1: 793,000 gallons wastewater per day
• Biogas – Phase 1: approx. 1,057,000-1,321,000 GPD
• Heat Energy – Phase 1: approx. 26.000 kWh/d

• Contract type: General Contractor as turnkey.
• Added value services: Design, project management and engineering, manufacturing, delivery, installation, commissioning, piping, electrical works and 3 months training on site.
• Wastewater solution: Filter system (1x NRF 90/300),Flocculator (1x PFR 140), Flotation (1x IPF180), denitrification, aeration tanks (BIOCTOR-CONTINUOUS), activated sludge flotation (2x GDF).
• Biogas solution: Hydrolysis tank, digesters (2x AECOMIX^TM-TAURUS), boiler, decanter centrifuge, gas scrubbers and flare.
• Intelligent services: Service contract.
• Official start date: January 2013.

In 2009, Nijhuis won the contract to deliver a full-scale WWTP and biogas plant to Cedrob. The WWTP is designed to treat different types of wastewater from Cedrob’s slaughterhouse, cutup line, cleaning water from the poultry farms and sanitary wastewater. The WWTP includes a wide range of Nijhuis technologies varying from filter systems (NRF 90/300), coagulation & flocculation (PFR 140), dissolved air flotation (IPF 180) and also an aerobic treatment system (BIOCTOR-CONTINUOUS) meeting all river water discharge standards.

The biogas plant is an integral part of the complete scheme. Biological excess sludge from the WWTP, sludge from primary Nijhuis DAF treatment, as well as sludge transported from off-site, are pre-treated and digested in the Nijhuis AECOMIX^TM-TAURUS (2x 418,000 gallon digester volume). The digestate is dewatered with a decanter centrifuge to be used as fertilizer.

The biogas produced in the digesters is optimized by a desulphurization step inside the digester and enters then to 2 special gas scrubbers in order to obtain the high gas quality with a methane content of over 70%. Gas scrubbing is required to produce heat for the 2 digesters and hydrolysis tank. The plant commenced operating in January 2013.

1. Complete turnkey WWTP and biogas solution.
2. Water quality to discharge to a near-by river.
3. Turn wastewater into > 1,057,000 gpd biogas.
4. Nijhuis expertise and application knowledge in the poultry industry.
5. Energy self-sufficiency, heat and electricity for the WWTP, biogas plant and slaughterhouse.
6. One of the largest industrial water reuse solutions in the world.
7. Mitigates water scarcity.
8. The most economical and best business case.

Treatment extension – Water Reuse Plant

Since 2019, the game-changing water reuse facility of Cedrob is in operation and is meeting game-changing sustainability goals. Currently the first of 2 stages is in operation and the plant will be one of the largest industrial water reuse solutions in the world. 2,114,000 gallons of wastewater per day will not longer being discharged to the nearby river but being recycled to drinking water and used for in-house purposes in the meat processing facility.