The Water Pages
England, 133 did not achieve ‘good status’ for chemicals. However, only 1075 were monitored and found to achieve ‘good’ status. A further 3471 were not monitored and were simply assumed to be ‘good’ and recorded as DNRA.1
“There are estimated to be one million highway outfalls to waterbodies in England, many of which are not officially considered to be known discharges of significant quantities of priority hazardous substances. Yet, road runoff has been shown to contain polyaromatic hydrocarbons, particularly the hydrocarbon benzo[a]pyrene, well in excess of the EQS. 2
“The report also calls out the threat to water quality from microplastics pollution including from urban runoff. Sub-5mm plastic particles from tyre abrasion provide a host to which toxic pollutants can adhere in the same way as they bind to silts and sediments in runoff.
“To stand a chance of achieving the country’s environmental water quality targets in future, there is an urgent need for greater monitoring and greater use of the existing regulatory powers to reduce polluting discharges from urban and road runoff. These are actions both for the Environment Agency itself, as well as for the highway authorities and other high-risk sources of urban runoff.
“A wide range of tools and techniques, including Sustainable Drainage Systems (SuDS), are available to treat stormwater runoff and they effectively target harmful pollutants by removing solids and filtering out toxic metals. At high risk locations manufactured devices, such as hydrodynamic vortex separators, can target problem pollution and can also be deployed successfully alongside vegetative features to prevent pollution from entering river water bodies.
“With a growing body of knowledge, best practice, guidance and regulation, the industry is ready and able to act on surface water pollution – but we expect
our environmental regulator to take a much stronger lead to monitor and enforce.”
About SDS Water Quality Treatment Products
The SDS Aqua-Swirl™ is a hydrodynamic vortex separator which effectively removes suspended solids from road runoff and retains them pending removal with a vacuum tanker. Under field test conditions completed in 2012, it achieved 80% removal of total suspended solids, where a large unit was installed to allow for infrequent but large storm events.
When smaller units are installed to treat more frequent, smaller rainfall events, efficiencies of 50% total suspended solids removal rate can be achieved. This is a significant improvement on the pre-treatment situation and any remaining soluble pollutants such as copper and zinc may be removed in vegetative SuDS devices such as ponds or wetlands. On challenging sites, or where space is at a premium, a hydrodynamic vortex separation and filtration system, such as the SDS Aqua-Filter™, can be installed to reduce the copper and zinc pollutant load.
Consider alternative water sources with Veolia
Veolia Water Technologies (Veolia) offers a variety of solutions that can help companies to cope with interruptions in mains water supplies, as well as effective reuse and recycling technologies to reduce overall demand.
A continuous supply of water is essential for many industries, and disruptions to water supplies, for example through burst pipes or drought, can significantly harm productivity or in some cases completely stop production. Veolia can help customers to evaluate how they use water and provide recommendations to make operations more efficient, helping to lower overall water demands and insulate businesses against water shortages.
If municipal water supplies are interrupted for business, Veolia offers a variety of technologies to help make the most of alternative water sources. For example, rainwater or water from boreholes can be used in boilers or cooling towers with minimal treatment and the company’s product range includes a number of solutions to enable rapid and cost-effective harvesting of rainwater and surface run-off which, once installed, can provide a supply of ‘free’ water. For higher purity water demands, Veolia can provide a wide range of systems – including clarifiers, RO systems and deionisers, which offer effective treatment of river or reservoir water, helping to ensure a secure alternative supply.
Reusing and recycling wastewater can also help to reduce reliance on mains water supplies. Water recovery systems involving filtration, RO and clarification steps can be used to help reuse and recycle water on site, preventing hundreds of thousands of litres of wastewater entering the sewage system, reducing overall consumption and potentially offering significant financial savings.
Kalpesh Shah, Industrial Sales Manager at Veolia Water Technologies, commented: “As the burst water mains and leaks caused by the ‘big thaw’ continue to disrupt UK water supplies, it is important to consider how complementary water sources can be used to safeguard your business operations against water shortages. Veolia has invested significantly in the development of efficient and robust technologies to help our customers exploit these alternative sources, as well as to reuse and recycle effluent to reduce their reliance on municipal water supplies.”
follow us on twitter @draintrader | April 2018 | drain TRADER 51
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