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Sewerage 

How best to align the funding processes with the various bodies involved in resolving flooding

Reference: 16/SW/01/16
ISBN: 1 84057 820 3
Published Date: 07/10/2016

Collaborative working between water and sewerage companies is in its infancy and there is therefore a need to develop common and systematic approaches to:

- identify and prioritise collaborative funding opportunities;
- work together to identify the full set of costs and benefits to different partners;
- ensure that partnership working can save money, unlock investment, and deliver multiple benefits;
- apportion benefits of investment to each partner and hence indicate a potential funding contribution, and;
- consider appropriate delivery mechanisms, and how to manage financial and delivery risks.

Guiding principles developed for this project build upon the existing good practice and will support a common and systematic approach to unlock collaborative opportunities. 

This report is available free of charge from the Environment Agency's website.

Price: £100  

The Practicality of a PPM Approach for Managing Sewer Blockages

Reference: 16/SW/01/15
ISBN: 1 84057 806 8
Published Date: 22/01/2016

This study identifies and quantifies the features of the various Planned Preventative Maintenance (PPM) approaches for managing the 350,000 blockages that occurring in the UK each year. The effective management of blockages first required the characteristics to be understood and this included demonstrating they are not random events. The use of Multiple Factor Analysis identified both static and time varying blockage correlations factors to explain the non-randomness, and this provided the ability to target PPM activities or explain performance changes. The use of SewerBatt to repeatable survey 50 sewers over a 6 month period showed blockages form when a set of circumstances occur following cyclical process of accumulation and erosion. The financial and non-financial features of the most common PPM approaches were quantified and the economic analysis completed, with the results being presented in an Intervention Hierarchy.The outputs from the study have been used to formulate a series of recommendations to improve the management of sewer blockages.

Price: £60  

Fats, Oils and Greases (FOG) - Where we are and where we could be

Reference: 15/SW/01/13
ISBN: 1 84057 787 8
Published Date: 27/08/2015

This report and associated appendices provides a comprehensive review on FOG enabling Water and Sewerage Companies (WaSCs) to develop their strategy in the short, median and long term for dealing with FOG. A technical tool, which can be used to aid strategy development, utilising the quantities of FOG discharged by different producers has been developed.

An economic framework is also presented which will enable economic business cases to be developed. WaSCs can, utilising both models, develop the most appropriate strategy for dealing with FOG.

The authors engaged with key stakeholders from WaSCs along with representatives from a number of other organisations such as Local Authorities, Hospitality and Food Services sector and FOG Processors.

Price: £60  

Fats, Oils and Greases (FOG) - Where we are and where we could be - The feasibility of biological dosing into sewer systems and the development / specification of a protocol

Reference: 15/SW/01/14
ISBN: 1 84057 789 4
Published Date: 27/08/2015

This report gives details of an extensive review of bio-additive dosing into sewer systems, both to degrade and control FOG deposits. The project showed that dosing can be successful, provided that the product is effective, site characteristics are considered and suitable site related practices are carried out.
To help promote successful dosing, a two stage protocol is specified, as follows:

- A testing methodology, to demonstrate a products ability to digest/degrade FOG (lipolitic activity); and 
- Site related aspects a methodology for planning, initial dosing to remove accumulated FOG deposits and maintenance dosing to minimise future FOG depositions.

This report has 2 sub reports, both downloadable free of charge. To access the documents please click the following links:

Part 1 - Laboratory Testing of Bio-Additive Dosing Compounds

Part 2 - Catchment, Site and Deployment Related Aspects - Summary Report

Price: £60