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On this page, you’ll read more about the activated sludge process in wastewater treatment. And discover which of our systems based on activated sludge are most cost-effective for your facility.
Biological wastewater treatment with activated sludge
To meet requirements for surface water discharge, primary treatment for solids removal and anaerobic treatment of wastewater are usually followed by aerobic treatment. The most commonly used aerobic treatment is the so-called activated sludge process. Paques has built over 50 activated sludge plants worldwide. The activated sludge process consists of an aeration stage - and an anoxic/oxic compartment if nitrogen has to be removed - and secondary sedimentation with sludge return. Systems for activated sludge are based on high quality surface aeration, fine bubble aeration or jet aeration depending on the type of wastewater. After final clarification, further treatment can consist of filtration, denitrification or effluent softening.
CIRCOX, the high rate aerobic process
CIRCOX®, the fully-closed aerobic system of Paques uses granular aerobic biomass for deep removal of COD and sulfides. The biological processes are similar to the activated sludge process but the compact nature of the granules allows for higher conversion rates. The granular biomass is kept in suspension by means of airlifts and has a high density and excellent settling properties. The granules are retained in the reactor by means of a bespoke granular biomass separator. Final polishing of the CIRCOX effluent is often achieved with a Dissolved Air Flotation before the effluent is discharged to surface waters.
The activated sludge process in BIOPAQ®UBOX
The BIOPAQ®UBOX offers highly efficient sewage treatment. It combines anaerobic treatment, aerobic treatment and biogas purification. This leads to low operational costs, a small footprint and zero odor emission. The system treats sewage in four steps: anaerobic treatment, supplementary aerobic treatment using the activated sludge process, secondary clarification and biogas purification. The BIOPAQ® UBOX is equipped with an exclusive anti-clogging pressurized feeding system. This ensures uniform distribution and avoids thickening of the anaerobic sludge.
The BIOPAQ® UBOX modular design is suitable for capacities of 5, 10, 15, 20, 30 and 40 thousand population equivalent (PE). By combining these different modules it is possible to treat even larger PE’s. Since implementation in progressive steps is an option, idle capacity is avoided.
Find out if BIOPAQ® UBOX is the most cost-effective solution for your facility
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Join the biotech revolution in wastewater and biogas
At Paques, we believe in a cleaner, more sustainable world where innovation in biotechnology plays a crucial role in managing our planet's resources wisely.
If you have any questions or wish to explore what Paques technologies can do for your operations, we encourage you to connect with our team of experts. Our knowledgeable professionals are ready to assist you, offering insights and guidance tailored to your specific needs.
Your inquiry is important to us, and we are eager to assist you in exploring our innovative solutions for biological wastewater and gas treatment.
A member of our expert team will be in touch shortly to discuss your specific needs and how Paques can help you achieve your environmental and operational goals.
We look forward to collaborating with you and hope to build a cleaner, more sustainable world together.
Warm regards,
The Paques Team
