WASTEWATER RESEARCH AND INDUSTRY SUPPORT FORUM
Meeting 9th July 2014
This was the Forum’s 53rd meeting. Andrezj Nowosielski (Environment Agency) chaired the meeting. It was the first we have held in CIWEM’s conference room at its new HQ, 106-109 Saffron Hill, London.
Please note that for older reports some links will be to sites that are no longer active.
The Forum reviewed and discussed its Terms of Reference and purpose. This was particularly useful because we have not visited them for several years. Andrezj Nowosielski agreed to prepare a paper for the next meeting.
A roundup of members’ research included the following:
Andrezj Nowosielski, EA
Don Ridgers described projects with which he is involved:
Oliver Grievson, Anglian Water
Roi Otero, Scottish Water
Technical Presentations with members of CIWEM’s Wastewater Management Panel
FlocFormer – the best floc for every dewatering task
Dr. Christian Schröder, aquen aqua-engineeringGmbH
Dewatering is a key step in sludge management processes. Correct polyelectrolyte addition is essential to maximise water removal but the surface chemistry of the sludge particles and the dry matter content of the feed sludge change continually. Dosing for the average feed quality means overdosing half the time and underdosing the rest, it also means sub-optimal water removal. If continual optimisation were possible it would reduce polyelectrolyte and transport costs, improve cake stackability and calorific value, decrease the cost of drying or whatever other process happens downstream of dewatering. FlocFormer claims to do just that, which if true will be a financial and operational boon to water companies.
Rapid determination of sewer serviceability using acoustics
Richard Long, Director of Technology, Acoustic Sensing Technology (UK) Ltd Mike Faram, Consultant - Technology & Innovation, Acoustic Sensing Technology (UK) Ltd
The presentation described the use of acoustic methods to determine the serviceability of sewers and drains. The method was developed over a ten-year period at the University of Bradford. In 2013 the spin-out company Acoustic Sensing Technology (UK) Ltd was set up to manufacture, sell and support the product worldwide. The paper will describe the development of the technology and how it can be applied in the water and transportation industries to increase service levels and reduce costs.
Remote sensing for the water industry
Stuart Clough APEM Ltd
Advances in remote sensing and image analysis enable more efficient and cost effective data collection, with significant benefits to the water industry. Mapping includes thermal effluent from treatment works, underground pipe networks, pipe leaks, invasive species, algal blooms, river habitats and 3D topographical visualisations.
Thermal cameras can map subtle temperature variations and show subterranean pipes and leaks. The near-IR shows areas of vigorous vegetation growth associated with wet, nutrient rich ground resulting from water or sewage leaks. Remote sensing techniques can map the likely route of domestic sewers. Even if the signature from the pipes is not visible directly, features such as manhole covers and soil pipes in very high resolution oblique imagery can be used to indicate the pipe route. Thermal IR from water treatment works can show areas of heat loss for heat recovery programmes, and the relative efficiency of filter beds based.
Remote sensing is relatively new to the water industry and can allow large areas to be surveyed quickly and efficiently, including remote and hard to reach areas. Data collected for one purpose can often be re-used multiple times for different applications, and monitor change over time.
The next meeting of the Forum will be Thursday, 30th October 2014