Wastewater Treatment & Sewerage 

UKWIR’s Source Apportionment GIS Model (SAGIS): Version 3.0

Reference: 19/WW/02/10
ISBN: 978 1 84057 866 9
Published Date: 21/04/2019

The SAGIS modelling system has become an integral part of the United Kingdom’s surface water quality planning process. SAGIS (in combination with SIMCAT) facilitates the development of plans to achieve compliance with Water Framework Directive objectives.  The primary benefit of SAGIS is that it ensures the Water Industry is not targeting capital and carbon intensive treatment solutions to address pollution arising from other sectors, so ensuring that investment provides value for money for water customers.  Furthermore, SAGIS promotes a constructive working relationship between Water Companies and Regulators through encouraging the sharing of models and data, thereby eliminating unnecessary duplication of effort. This project has made SAGIS compatible with the latest versions of SIMCAT and MPER, a new metal bioavailability discharge permitting tool. Together with new model calibration methodologies and documentation, these developments are the most significant since the original SAGIS development. Project benefits include increased functionality and future-proofing of SAGIS.

This report is sold together with five other UKWIR reports;

  • Extending and Updating UKWIR's Pollution Source Apportionment Tool (2) (UKWIR Ref 18/WW/02/9)
  • Extending and Updating UKWIR's Source Apportionment Tool (UKWIR Ref 14/WW/02/8)
  • WFD Requirements for Lakes, Transitional and Coastal Waters: Source Apportionment for Nutrients and Priority Chemicals (UKWIR Ref 13/WW/02/4)
  • Chemical Source Apportionment under the WFD (UKWIR Ref 12/WW/02/3)
  • Chemical Source Apportionment under the WFD - Model Scoping Document (UKWIR Ref 10/WW/02/2)

Price: £600  

Wastewater Treatment Works Flow to Full Treatment - Monitoring and Compliance Assessment Method Development

Reference: 18/WW/21/17
ISBN: 1 84057 865 3
Published Date: 14/01/2019

Many Wastewater Treatment Works (WwTW) have MCERTS flow monitoring equipment at the works outlet only, which poses difficulties for assessing compliance with discharge permit conditions for Flow to Full Treatment (FFT).

We investigated the range of measurement arrangements currently in use, and their implications for FFT compliance assessment. Water companies and Regulators were consulted on their views regarding the potential (and need) for alternative FFT compliance assessment methods.

Two alternative methods (driven by flow and EDM data) were developed and applied. Approach 1 involved comparing durations of storm weir spill events and durations for which associated effluent flows exceed a FFT consent threshold. Approach 2 involved determining the level at which effluent flow reaches a plateau during storm weir spill events.

The feasibility of using static flow surveys to determine FFT compliance is also discussed.


Price: £350  

Extending and Updating UKWIR's Pollution Source Apportionment Tool (2)

Reference: 18/WW/02/9
ISBN: 1 84057 851 3
Published Date: 29/04/2018

The SAGIS-SIMCAT modelling system underpins a significant part of the Water Industry’s water quality investment planning through providing the ability to develop effective evidence-based Programmes of Measures whilst maintaining the ‘Polluter Pays Principle’. SAGIS-SIMCAT will serve as the regulatory agencies primary catchment planning tool until at least 2027. This project has delivered improvements to SAGIS in three key areas, namely; (1) functionality enhancements to improve the representation of catchment processes, (2) data enhancements to align SAGIS with the second cycle of River Basin Management Planning requirements, and (3) a series of catchment investigations focusing on Natura 2000 sites that provide an up-to-date view on model performance, an understanding of the sources of chemicals and options to minimise the risk to compliance with water quality objectives.

This report is available in a set with UKWIR's published reports on Chemical Source Apportionment, available for purchase together at a reduced price of £600.

Price: £100  

Engineering Biological Wastewater Treatment for The Removal of Hazardous Chemicals from Activated Sludge Plants

Reference: 17/WW/04/19
ISBN: 1 84057 847 5
Published Date: 13/12/2017

The aim of this project was to assess if biological treatment processes at wastewater treatment works could be engineered to improve the efficiency of hazardous chemicals (HCs) removal. 

In this case, the effect of the engineering process parameters Solids Retention Time (SRT), Hydraulic Retention Time (HRT), temperature on microbial diversity were studied to identify those conditions that were most conducive for microbial degradation of HCs.

Price: £50