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Nijhuis Saur Industries

Project's context and challenges

VPK Group produces sustainable packaging such as recycled paper, corrugated packaging, solid board packaging and cores and edge protectors. When the Alizay paper mill was acquired by VPK Group, the paper machine was converted from a machine making office paper to a machine producing packaging from 100% recycled paper. Because of this change, the wastewater became suitable for anaerobic treatment resulting in a return of investment for anaerobic treatment and biogas re-use within a few months. The Econvert-IR® was implemented into the existing wastewater treatment plant with aerobic treatment. To clean and re-use the produced biogas in the paper machine’s boiler, the Econvert-Dsulph® was implemented.

Econvert-IR anaerobic wastewater treatment

Key figures

60
ton COD/day
274
kg S/day
100m3
biogas buffer capacity
"Since 2020, Econvert has been our trusted partner in anaerobic treatment for VPK group. During the last 5 years, Econvert has successfully implemented anaerobic treatment solutions at our recycled paper production sites Oudegem, Strassbourg, Alizay and Soustre even if it was not always a walk in the park. At all four locations, Econvert’s reactors perform as promised. We recommend Econvert as both a technology provider and reliable partner for anaerobic treatment. "
Ann Deschildre
Process Technologist

Customer benefits

Econvert-IR® designed to handle recycled paper effluent challenges (calcium and high loads)

>99% H2S removal efficiency of Econvert-Dsulph®

Produce up to 24.000 m3 biogas per day

Small footprint

Low energy consumption due to internal recirculation

Solution

Econvert delivered an Econvert-IR® before the existing aerobic treatment in order to enable the production change from office paper to recycled containerboard. In addition to this an Econvert-Dsulph® is installed to remove H2S from the produced biogas, in order to utilize the biogas in the boiler providing steam for the paper machine.

Scope of supply

  • Design and engineering of Econvert-IR® and Econvert-Dsulph®
  • Supply of all equipment, internals and tanks
  • Installation, commissioning & project management
  • Start-up and training operators
  • Operational support (Services)

Applied solutions

  • Econvert-IRC®11524
  • Econvert-Dsulph®
  • Biogasbuffer – 100m3
  • Flare – 1000m3/h
  • Biogas dryer
  • Biogas blower
  • Condensate pit with pump

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