Work package 1: Assessment of the Energy balance of the urban water cycle

In the optimisation of the urban water cycle in the past decade almost no attention was paid to its energy balance. This is a missed opportunity, as it is the energy balance that offers great opportunities for further optimisation by reducing energy use and carbon emissions. Therefore, to improve the urban water cycle in terms of energy use and recovery, this work package aims to examine both the potential for reducing operational energy and the potential for re-using thermal and chemical energy.

Developing a tool

An energy balance assessment tool (EBAT) will be developed based on a set of existing models. This model can be used to asses new arrangements of innovative technologies. It will show for example the consequences of the thermal energy recovery from sewers for the processes in the wastewater treatment plant. Based on these insights a more sustainable urban water cycle is in the offing.

Objectives

The objectives of this work package are:

  • Understanding of the energy balance of the urban water cycle by means of measuring the energy potential in the urban water cycle and by modelling different parts of the urban water cycle.
  • An assessment instrument based on a set of models for optimising the thermal, chemical and operational energy performance of the urban water cycle.
  • Assessment of the impact of new arrangements and/or innovative technologies on the energy balance of the urban water cycle. 

Five actions have been developed to meet these objectives.

Actions

  • Action 1: Inventory of state of the art knowledge, models and datasets concerning the energy balance of the urban water cycle resulting in a Terms of Reference for measuring and modelling the urban water cycle and developing the assessment instrument (EBAT).
  • Action 2: Collecting relevant data (i.e. flow, compounds, temperature and operational energy) at various locations in the urban water cycle.
  • Action 3: Modelling the energy balance of the urban water cycle build on existing models.
  • Action 4: Building the energy balance assessment instrument (EBAT).
  • Action 5: Assessment of new arrangements and innovative technologies from work package 2 and 3.