Unforeseen increased rainfall can create a problem for sewage networks and treatment plants. Bypass systems - originally designed to protect sewage works from occasional freak conditions - divert excess flows directly into the watercourses. Overflow of sewers and wet-wells is often diverted onto adjacent land. As a result, when flood conditions occur, high levels of untreated sewage flow into the watercourses and on to the land, creating unacceptable ecological conditions.
There is now an urgent need to quantify the problem, so that water companies can design solutions to store or redirect storm flows. In response, one of Dupleix Liquid Meters (DLM) leading suppliers, Solartron Mobrey, developed what it believes is the world's first, and only, integrated level meter, pumped volume flow meter and storm overflow meter: the MCU901.
Solartron Mobrey's water industry expert, Alasdair Ward, explains: "We identified a need among our water company customers to measure the abnormal flows upstream of the sewage plants, in the wet-wells, so they could study the possibilities of redesigning or inter-linking networks in order to spread the load."
Thanks to this innovative new device the water companies now have one single, highly cost-effective instrument which can monitor the flow which did not reach the processing site, as well as the flow entering the works. Trials of the double totalising functions of the MCU901 control unit by a leading water company in France resulted in the immediate commissioning of 10 units and plans to install a further 50 units in a number of major cities.
The MCU901 control unit is used with a level transmitter to indicate level, total pumped volume and total overflow volume. The cost of the system is little more than a single conventional open channel flow monitoring system and much less than the cost of investing in two separate systems - currently the only other option.
Dave Rosser, general manager of DLM's Instrumentation Division says, "Excessive rainfall, flooding and under-capacity of processing sites is increasingly a problem worldwide. MCU901 offers a cost-effective solution to measurement of the problem, helping water companies to design appropriately sized solutions before the problem becomes a financial, social, or environmental disaster."
DLM is one of southern Africa's leading innovators in the engineering of over pressure protection; flow, level and density measurement; automation and control solutions. The company offers a comprehensive, technologically advanced range of products sourced from leading international manufacturers, providing optimum solutions in a wide range of industries. DLM has six branches countrywide - in Cape Town, East London, Pinetown, Rustenburg, Welkom and Vereeniging - in addition to its headquarters in Longmeadow, just outside Johannesburg.
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