Wastewater Treatment and Sewerage
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Dangerous Substances in Discharges: Setting Consent Conditions and Assessing Compliance
Price: £200
Ref: 07/WW/21/9
ISBN: 1 84057 429 1
Applying Maximum Limits (MLs) to Dangerous Substances (DSs) in Wastewater Treatment Works (WwTWs) effluents poses problems. This report describes work for UKWIR and the Environment Agency to quantify effluent variability and propose consenting alternatives.
A three-element alternative is proposed: a 95%ile for routine control, a 99.5%ile to address the skewness of DS distributions, and an absolute maximum for legal reasons. The performance of each element is investigated.
The Project Steering Group recommends the following approach, the practical implications of which are described in the report:
- Limits on each DS at a WwTW:
A Lower-Tier 95%ile, assessed every calendar year by Look-up Table (LUT).
A Middle-Tier 99.5%ile, assessed annually on a 5-calendar-year basis by LUT.
An Upper-Tier absolute maximum (an agreed multiple of the Middle-Tier limit).
- Applied to pooled DSs at a WwTW:
Compliance with all Middle-Tier limits, assessed on an annual 5-calendar-year basis by LUT.
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DOMS - What Can We Learn? Research Report
06/WM/18/3 - ISBN: 1 84057 424 0Existing water company Distribution Operation and Maintenance Strategies (DOMS) have been reviewed in order to identify current best practice and highlight areas where further development would be beneficial. ... More...
Price: £200
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Barriers to Innovation in the Water Sector: Output from the Project Dissemination Conference, DTI Conference Centre December 2006
07/RG/10/2 - ISBN: 1 84057 428 3The report contains the proceedings and output from a conference to discuss the findings of the UKWIR Barriers to Innovation project report 06/RG/10/1. The original work was carried out by the Policy Research in Engineering, ... More...
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