| The client’s needs

Regulatory compliance to ensure their license to operate. High loaded wastewater with stringent discharge limits into the sea. Reduction of the environmental impact (odors, noise, footprint, etc) and resource recovery.

| The solution

We were involved at an early development stage. The conceptual design followed a validation study executed at Biothane’s — a subsidiary of Veolia Water Technologies — laboratories, and the optimal water treatment line was concluded. A design was created to secure optimal performance in biogas and water quality production.
The process consists of several stages. The first stage is the anaerobic stage. Following the wastewater treatment in the Biobed® system where biogas is produced. The biogas is then upgraded to natural gas standards by means of Sulfothane™ (for hydrogen sulfide (H2S) removal) and Memgas™ (for biogas upgrading) and injected into the gas grid. The effluent is post-treated in the aerobic treatment stage, followed by a tertiary treatment including Multiflo™ and Hydrotech™ discfilter to secure high-quality standards.

| The client

Dieppe -- The companies of Royal DSM and Avril have established their joint venture Olatein. The production plant will produce canola (rapeseed) proteins and is being constructed in Dieppe, France. Royal DSM is a global science based company in nutrition, health and sustainable living. Avril is France's fourth-largest agro-industrial group. The plant based, food-protein product (CanolaPRO) is the example of sustainable future proof food production.

Key Figures

 Plant status: installation phase

4,000 T COD treated per year

1,000,000 Nm3 of biomethane
produced per year
11 GWh of green gas injected to the
gas grid per year

   | The benefits

  • Green gas production from wastewater
  • Carbon footprint reduction
  • Integration in the middle of the town taking into account the neighborhood
  • Creating local employment
  • New production process of vegetal protein from the residue of colza oil
  • Circular economy from agriculture to energy production

| Results

The Circulargaz project is an exemplary case of sustainable production by: (1) resourcing the production effluents as a renewable energy source (2) injection of biomethane in the public energy network and (3) high-quality effluent discharge. It results in a positive impact to the environment. In the context of the production of a sustainable plant based protein, the DSM and Avril venture shows a high-performance standard in practising circular economy principles by unlocking value from a resource. Veolia is proud to participate as designer, contractor and operator.

| Process


Veolia Water Technologies Techno Center Netherlands B.V. / Biothane
Tanthofdreef 21 • 2623 EW Delft • The Netherlands
tel. +(31) 0 15 27 001 11