When is ‘surface water removal’ the most cost beneficial solution?

Reference: 20/SW/01/20
ISBN: 978-1-84057-911-6
Published Date: 30/01/2021

Managing and removing surface water from sewers offers a number of operational benefits. Using different types of sustainable interventions can create substantial wider community benefits.

There is an increasing appetite across the industry to consider and deliver such interventions to help manage a range of drivers. However, this appetite is not matched by an in depth understanding of the factors that make surface water removal options more cost beneficial than traditional engineering solutions.

This UKWIR project led by Stantec, CIRIA and Anthony McCloy Associates helps to develop that understanding through:

  • providing examples of surface water removal projects from the UK and Ireland and globally
  • identifying the factors which make surface water management solutions successful
  • understanding some of the UK and Ireland legislation that effects the delivery of surface water interventions
  • developing a decision support tool to help those undertaking surface water removal projects in making better decisions

Price: £44  

Energy from Sewers

Reference: 19/SW/03/1
ISBN: 978-1-84057-884-3
Published Date: 10/12/2019

The opportunity for heat recovery from sewers and other forms of energy generation was investigated and a selection tool produced to identify heat recovery opportunities and support water utilities in developing clear business cases.

The literature review identified the scale of energy recovery technologies available to water services utilities.

Risks from blockages caused by heat exchanger or turbine heat recovery in the sewerage system were identified as were potential risks to wastewater nitrification (unless heat is taken from treated effluent).

The legal conclusion reached is that wastewater may be classified as waste, therefore permits may be required. 

Heat recovery from wastewater can make a significant contribution to the reduction of the carbon footprints in water utility service providers. The scale and opportunity for energy recovery from sewers is dependent on local conditions.

Price: £300  

Modelling solid transport and deposition in urban sewerage systems

Reference: 19/SW/01/19
ISBN: 978-1-84057-868-3
Published Date: 23/04/2019

The overall aim was to model solid transport and deposition of sediment in urban sewerage systems as a means to investigate the possible impact of water conservation measures taken in the home on the self cleansing ability of a sewerage network.

Price: £50  

FOG Control and FOG Collection: A joined-up approach

Reference: 18/SW/01/18
ISBN: 1 84057 859 9
Published Date: 07/10/2018

Sewer blockages due to discharges of fats, oils and greases (FOG) can cause flooding and pollution events. These events are unpleasant for the public, can cause property and environmental damage and can result in the Water and Sewerage Companies (WaSCs) receiving a fine. Further to this, Outcome Delivery Incentives (ODIs) have been set within the water companies in England and Wales to financially motivate, using penalties and rewards, lower occurrences of sewer flooding events (amongst other categories). Through detailed interviews with UK WaSCs, it was found that 13-31% of blockages in the UK are attributed to FOG, that uncertainties lie around WaSC legislative powers, and that the education and enforcement approaches differ. These interviews and the comprehensive literature review and interviews with global water utilities, local authorities and FOG collection/recycling solution providers gave insight into the various approaches employed across the world to control FOG discharges, and the opportunities for FOG collection and recovery in the UK. The FOG strategy, developed as part of this project clearly sets out the path to collect and recover all FOG by 2030, and achieve zero uncontrolled FOG discharges from sewers by 2050.

Price: £65