water management industry, water management residential

Reduce water consumption and wastewater discharge at a zoo

Reference case The Zoo of Antwerp

Introduction to the challenge

The Royal Zoological Society of Antwerp (RZSA) aims to reduce water consumption and wastewater discharge at the Zoo of Antwerp to around 90,000 m³/year.

Reducing water consumption must be accomplished by a combination of water reduction (e.g. through awareness raising), water recuperation and use of rainwater. A reduction in water consumption will automatically lead to a reduction in the Zoo's water discharge. Additionally, water discharge can be reduced further by allowing certain rainwater flows to infiltrate into the site's soil or by segregated discharge, instead of directing them to the combined sewerage system

Our approach

Rigorous inventory and cost-benefit analysis of all possible water saving measures

Reduce water consumption and wastewater discharge at a zoo
  • Based on the available information regarding water consumption and discharge rates, an extensive analysis of the water flows within the Zoo of Antwerp was carried out.
  • This analysis provided an insight into the major water consumers on the site.
  • By combining these data with the highly specific quality requirements for the different water flows, the main water saving potentials were identified.
  • Subsequently, optimisation scenarios were elaborated to significantly reduce drinking water consumption by these consumers. Potential solutions considered included reducing water consumption through awareness raising or process optimisation, use of rainwater, and treatment of the generated wastewater flows for subsequent reuse.
  • For each of these scenarios a cost-benefit analysis was performed, which resulted in concrete optimisation proposals.
  • After discussing the proposals with the customer, the selected scenarios were technically elaborated and incorporated into tender specifications.

Our solution

Reducing water consumption through awareness raising and process optimisation – Reducing discharge through reuse

This in-depth analysis resulted in an overview of potential optimisation scenarios, each of them with a cost-benefit analysis of the specific sub-projects. In addition, technically detailed project descriptions and tender specifications were drawn up for the selected projects.

Main result areas:
  • Reduction in water consumption through awareness raising or process optimisation
  • Use of rainwater
  • Treatment of generated wastewater flows for subsequent reuse

The benefits

Substantial reduction in water consumption and wastewater discharge

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