Water and Effluent Treatment Magazine
Issue link: https://fhpublishing.uberflip.com/i/892519
NOVEMBER 2017 WET NEWS 15 Tasks of the example depicted: long-term recording of flow rate and flow velocity for archiving in a distribution system operator's drinking water supply pipeline. Accuracy requirements in this case are very high since the measurement place is to be used for billing purposes. A NivuFlow 600 system with invasive sensors by NIVUS was used. The sensors were inserted into the pipe by using tapping nozzles. This is how the readings could be provided to the following SCADA system with the required level of accu- racy via data connection. The variety of sensors and installa- tion material allows picking up readings at various measure- ment spots. Flow measurements based on the ultrasonic transit time difference principle have not only undergone many years of extensive testing. They have Transmitter and a variety of sensor types THE CONCEPT • The DVF allows lighter contaminates to be retained in a vortex which operates above the filter bed surface • The vortex effect is maintained throughout the upper part of the filter vessel • The vortex generating nozzles have large orifices so no blockage is possible NEED TO KNOW 1 operation of the DVF at a flux rate of 40m3/m2 had no impact on filter performance 2 Activated glass resists microbiological fouling 3 Creating a vortex above the filter bed can have its own issues – a quiet zone is created where microbiological growth can proliferate also proven successful in prac- tical use and stand out for a high level of accuracy and flexibility in terms of applica- bility in various measurement places. The robustness and ease of maintenance mean the ultrasonic transit time princi- ple is suitable for both meas- uring in pipes with smaller diameters (such as process water or cooling water) as well as for permanent measure- ments on demanding meas- urement sites (such as large pipe diameters, hydro-electric plants, high process water vol- umes and varying media). With new-generation devices, however, the benefits of the method have been sig- nificantly extended. Among other things, measurement ranges and accuracies of flow measurements have been increased considerably. n Ralf Bruening is with NIVUS. THE VERDICT • The DVF was an effective 1 micron filter with efficiency ranges of removal at 1 micron of up to 80% being viable • Smaller footprints were possible for comparative flow of conventional media filters The NivuFlow 600 system SUPPORTED BY SUPPORTED BY WATER NORTHERN IRELAND CONFERENCE 22 FEBRUARY 2018 | BELFAST BOOK NOW events.wwtonline.co.uk/ni INVESTING IN HEALTH, THE ECONOMY & THE ENVIRONMENT This is the only event that brings together the leaders of the major stakeholder groups to address the current and future challenges facing the Northern Ireland water sector. Linda MacHugh Director of water policy & shareholder division Department for Infrastructure Jenny Pyper Chief executive offi cer Utility Regulator Sara Venning Chief executive offi cer Northern Ireland Water Nigel Watson Chief information offi cer Northumbrian Water Catriona Davis Chief inspector of drinking water Drinking Water Inspectorate Jane Mellor Head of operational procurement Northern Ireland Water Nick Mills Head of wastewater innovation Thames Water EXPERT SPEAKERS INCLUDE: ● Assess the strategic priorities for PC21 and long-term investment ● Gain insight into Northern Ireland Water's capital delivery plans ● Hear from industry leaders on the keys to success with digital transformation WWTwaterNI-18-brochure.indd 1 29/08/2017 09:42 sera is one of the worldwide leading manfacturers of wastewater treatment technology • Tailored solutions for chemical addition • Our dosing technology is highly standardized but offers all options for customisation • Consult sera for individual advise SEWAGE SYSTEM ODOUR CONTROL - NO MORE UNPLEASANT SMELL sera ProDos UK Ltd. +44 1733 396040 sales.uk@sera-web.com www.sera-web.com