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Printer Friendly VersionSelected Information - Proposed Research

CP511  Delivering Risk Reduction at Small WwTW Technology
Project Appreciation and Objectives

The UK has about 6000 small waste water treatment works (WwTW). They usually have low energy costs for treatment, but require frequent and costly maintenance visits to prevent failures. Typically there is limited instrumentation and therefore few alarms to alert operators between visits to problems which can result in compliance failures and impact on environmental performance. This project will provide a monitoring strategy and tools suited to small WwTW, and will support implementation of these at participating companies.

WRc carried out two research projects during 2002-4 into small WwTW monitoring using low cost wireless sensors. This project will build on the technology base of this earlier work, using a risk based approach to getting best value from monitoring systems.

The objective of the project is to help companies reduce compliance failure and improve environmental performance at Small WwTW through the use of appropriate monitoring technology via a confidence building, risk-based approach with supported implementation.

Business Benefits to Clients

  • Improved compliance at small WwTW
  • Best value risk reduction for investment across small WwTW sites.
  • Selection of the most appropriate technology from a single resource of up to date information.
  • Alarm templates to assist engineers in setting up the alarm logic.
  • A tested approach to small WwTW monitoring, implemented with the support of WRc

Work Programme

  1. Develop detailed risk tool for small WwTW.
  2. Produce information and selection resource on technology solutions.
  3. Produce alarm templates.

Phase 2: Supported implementation:

  1. Support clients in design and installation of monitoring systems at pilot sites.
  2. Assess pilot site performance and feed-back results to contributors through reports and a workshop.

Project Output and Implementation

  • Risk tool for small WwTW.
  • Guidance and supporting information for selection of the right technology.
  • Generic alarm templates.
  • Supported implementation with case-based reports.
  • A workshop at the end of the project to consolidate the approach with key staff.

Related WRc Work

  • CP004 Reducing costs and improving operational efficiency at unmanned sewage works (2002)
  • CP109 Managing the risks of failure at unmanned sewage treatment works (2004).
  • CP273 Managing CSO screens to reduce the risk of failure (2008).
  • Detailed risk modelling of 7 WwTWs of varying sizes for a UK client.
WRc's Portfolio Programme
Summary of the £1.5 million per annum research programme

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