Water/Waste Processing - Feb 2012
First purely practical land is expensive and residents would object to ever larger treatment sites But second working to the limits of design capacity the existing system was anyway struggling to cope with peak demands and more of a problem than this was the need to meet rising consent standards into the nearby River Stour Clearly something had to be done Jill Smith Wessex Waters commissioning R690 Diaphragm Valve NEW DESIGN OLD DESIGN Gemüs unique modular design can reduce your spare part requirements over conventional designs by as much as 50 Model DN32 available in one size only NEW DESIGN OLD DESIGN www waterwaste com Water Waste Processing February 2012 13 engineer for the scheme claims the Gillingham project was relatively quick from inception to completion and in its way quite straightforward though not without the unique challenges every project faces It had been clear for some time that something had to be done about Gillingham as it was one of the fastest growing towns around she says The only question really was to work out the best way to do it The existing system could cope with the flow volume but with the increasing flows the quality of the output into the River Stour needed work to maintain consent standards And the standards are becoming ever more stringent so we had to look at not just what we needed at the time but within a reasonable future horizon as well Our challenge was the way the consents on outfall water are measured It depends on the finite amount of organic solids dispersed to the river not the actual state of purification of the water itself This means that for example if you double the flow of water through the system you have to halve the solids held within it after treatment so you dont increase the total amount of solids put into the river Then there was the question of cost Because we were working with the growing population and the increased flows that come with that we couldnt apply for funding through OFWAT in the way you can if youre investing and upgrading simply to meet higher consent standards So ultimately our decisions were guided by the need to remove more solids to reach consent standards to get rid of the additional ammonia content that comes with the increased flow and to do this in the most cost effective manner Optimized Flow Characteristics Features Benefi ts Economical modular design provides multi size solutions from just one valve Flow optimized geometry Improved design minimizes footprint and saves you space Cost saving Energy saving 3800 CAMP CREEK PARKWAY BUILDING 2600 STE 120 ATLANTA GA 30331 TEL 678 553 3400 FAX 678 553 3459 www gemu com Write In 108
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