XỬ LÝ NƯỚC THẢI _ Versailles FRANCE _ 96.700m3/ngày

XỬ LÝ NƯỚC THẢI _ Carrée de Réunion (France) _ 96.700m3/ngày

Largest Membrane Bioreactor System in Europe Utilizes PURON® MBR Modules

Wilmington, Massachusetts – Koch Membrane Systems (KMS) a global leader in the development and manufacture of innovative filtration membranes and systems for water and wastewater treatment, today announced that the largest MBR plant in Europe is now fully operational treating 100% of its incoming capacity with KMS PURON® MBR modules.

The wastewater treatment system was upgraded to an MBR system with 10 trains of PURON® membrane modules to process up to 96,700 m3 (25.5 million gallons) of effluent per day. The PURON® MBR technology modernizes the plant so it will meet future effluent quality and legal requirements of the European Community.

Overview
Located within viewing distance of the famous Palace of Versailles, the Carrée de Réunion Wastewater Plant acts as a centralized treatment facility for the surrounding region.

The Carrée de Réunion plant has been required to expand capacity while maintaining stringent effluent requirements as more and more of
the local treatment facilities have been taken offline in an effort to consolidate resources. Furthermore, the facility upgrade was confined to a very limited footprint in order to remain unnoticeable to visitors of the neighboring palace gardens.

Koch Membrane Systems (KMS) and OTV France Nord (Veolia) jointly developed an expansion strategy centered around membrane bioreactor (MBR) technology. Currently, Carrée de Réunion is the largest MBR plant operating in Europe, and is the fifteenth largest of its kind in the world.

Since commissioning, the upgraded facility has consistently met theever-increasing treatment demands of the Versailles region, without disturbing the experience of the palace’s 7,500,000 annual visitors.

The Challenge
To expand capacity and improve the effluent quality of the existing conventional activated sludge (CAS) treatment plant within the limited existing footprint without negatively impacting the nearby palace of Versailles.

The Solution
KMS and OTV France Nord (Veolia) provided an expansion strategy leveraging the benefits of MBR technology.

With the ability to operate at higher mixed liquor suspended solids (MLSS) concentrations, the PURON® MBR nearly doubled the treatment capacity of the conventional wastewater treatment plant within the same footprint and bioreactor infrastructure.

By incorporating the MBR into the existing plant infrastructure, KMS and Veolia were able to keep the system discreet and unnoticeable to visitors of the palace. Additionally, the visible components of the system were housed in a building with architecture similar to the
surrounding area. “Our green plant is discreetly placed in the plain of Versailles, as a protective oasis for our living environment” said Mr. Daniel Higoin, director of SMAROV who owns and operates Carrée de Réunion. The treatment plant has a “refined and elegant architecture, integrated in[to] one of the most beautiful landscapes”

In addition to facilitating plant expansion, the PURON ultrafiltration membrane acts as a physical barrier which completely retains suspended
solids within the bioreactor. As a result, the upgraded MBR produces higher quality effluent than the existing CAS system, and is unaffected by biological upset events.

KMS was selected by Veolia as partner due to the technological benefits of PURON MBR technology along with successful collaborative efforts on over fifteen MBR projects across Europe and KMS’ dedication to providing a customer-driven solution from project inception through operation of the system.

Europe’s Largest MBR
Equipped with approximately 162,000 m2 of membrane area, the upgraded MBR system has processed peaks up to 38.0 MGD since its commissioning in November 2015. In addition to the 10 filtration trains currently in operation, infrastructure for two additional trains was provided to facilitate future expansions as more hydraulic load is shifted to Carrée de Réunion from smaller de-centralized plants.

Before entering the membrane filtration tanks, wastewater is treated with a series of anoxic and aerobic activated sludge treatment zones to
meet stringent total nitrogen (<10 mg/L), phosphorus (<1 mg/L) and BOD (<5 mg/L) effluent limits. Working in concert with the biologicaltreatment steps, the PURON® ultrafiltration modules provide a physical separation barrier ensuring that the effluent requirements are consistently achieved regardless of upset conditions. Consistent effluent quality is especially important for Carrée de Réunion, because the treated water is discharged into Ru de Gally creek located in the palace gardens, and eventually enters the Seine River.

Although the MBR system has provided consistent treatment since commissioning, KMS continues to support the plant operators in an ongoing effort to optimize system performance. A team of KMS process engineers and field-service technicians has provided frequent site visits and remote data monitoring services which have led to optimization of plant operation. Implementing these changes has thus far led to decreased energy consumption, cleaning chemical reduction, more stable system performance, and an overall lower cost-of-ownership for the citizens of the Versailles region.