Water / Wastewater Treatment
New Advanced Hydrodynamic Seperator HYDRO International (UK) has launched the next generation of its innovative Downstream Defender®
for treatment of suspended solids and pollutants in surface water runoff. The new Downstream Defender®
advanced hydrodynamic separator in anticipation of tougher UK legislative requirements has been developed to offer greater design flexibility with optimum efficiency and minimal maintenance, typically achieving greater than 80% removal
of grits, silts and oils in a much smaller footprint than conventional gravity or swirl-type devices. The expectations of the EU Water Framework Directive for improved water quality standards by 2015, the implementation of the Flood and Water Management Act in England and Wales
and the Water Environment and Water Services Act (Scotland) are all likely to place demands on highways authorities and developers for increased treatment of runoff from roads, car parks and developments. Says Hydro Stormwater Director Alex Stephenson:
“Much stronger legislative drivers for stormwater treatment are just around the corner in the UK, with this in mind Hydro has developed Downstream Defender® demand. New national standards for Sustainable Drainage Systems are also likely to stipulate treatment requirements and we believe it’s important to set the bar high from the outset.
to be ready for significantly increased
“This next generation device will offer an unrivalled ability to prevent re-entrainment (or washout), even during peak storm conditions, which could be a critical factor in ensuring adherence to discharge limits in future. More conventional alternatives do not provide protection against solids and pollutants stored in the device from being flushed out during intense storm events.” In response to customer demand, the new Downstream Defender®
a second manhole. The Hydro Downstream Defender® is expected to be used increasingly to treat runoff from impermeable surfaces where there is a build up of sediments, floatables and petroleum products such as highways,
car parks and industrial areas. It is particularly effective at removing and retaining sediments that carry with them adsorbed chemical pollutants, metals and hydrocarbons. Downstream Defender®
Hydro Downstream Defender® achieving a long, stable flow path to maximise separation of solids, floatables and oils within a small footprint.
Washout is prevented by retaining captured sediments in an isolated storage area at the bottom of the chamber and a built-in trap stores oils and floatables. Sediments are removed periodically by standard vacuum tanker equipment. Maintenance is significantly easier than for diffuse solutions such as gullies or catch pots, enabling longer maintenance intervals and providing a single point of access. The new Downstream Defender®
has four sizing options with diameters of 1.2 m, 1.8 m, 2.55 m and 3.0 m, as opposed to the previous 7 sizes available, offering simplified design parameters for ensuring greater
than 80% removal efficiencies of pollutants at peak flows . Units can also be designed to achieve other defined pollutant removal targets according to site specific conditions and / or performance objectives required. Reader Reply Card No 41
Licensing Agreement Expanded for Ultrapure Water
GE Energy (USA) announce it has completed a new expanded licensing agreement that will allow the company to continue offering High Efficiency Reverse Osmosis (HEROTM) systems to help more of its industrial customers increase their water usage efficiency and reuse capacity as the international community works to address mounting shortages of clean water.
GE has a long history of supplying HERO-based systems to customers that need reliable and cost- effective supplies of ultrapure water for production and wastewater recycling. The new pact with Debasish (Deb) Mukhopadhyay, HERO’s process developer and patent holder, allows GE to feature HERO in even more of GE’s growing portfolio of advanced water and wastewater treatment solutions.
Compared to conventional RO systems, the HERO offers higher recovery of feed water, higher production rates, higher product water quality levels and reduced scaling and fouling.
“Our new agreement with Deb Mukhopadhyay reflects GE’s commitment to support the development and commercial deployment of HERO and other clean water technologies to help customers around the world address its mounting energy and water resource challenges,” said Jeff Connelly, vice president, engineered systems—water and process technologies for GE Power & Water.
Under the agreement, GE will hold specific rights to market and manufacture solutions that utilise the HERO technology in key industry segments and applications including:
Microelectronics; Hydrocarbon Processing Industry (HPI); Chemical Processing Industry (CPI); Zero Liquid Discharge (ZLD); Food and Beverage and Mobile Water Treatment.
The HERO process involves operating a RO system at a pH level of 8.5 or higher in conjunction with any combination of two or more of the following process steps in any order: hardness removal, alkalinity removal and dissolved gas removal.
“This agreement allows GE to offer unique technology to handle such high pH feedwater streams, enabling HERO to produce the ultrapure water required by numerous manufacturing processes around the world, supporting local economic growth in these regions,” Connelly said.
Reader Reply Card No 43 Reader Reply Card No 44
UK’s first Skjöldgas AD Plant Brings Environmental and Energy benefits to William Grant & Sons Distillery Operations.
For the last two years William Grant & Sons and Von Nordenskjold Verfahrenstechnik GmbH have worked together to optimise a SKJÖLDGAS®
Anaerobic Digester at their Girvan distillery.
They can now reflect on the combination of environmental benefits of treating their waste stream, improved CO2 footprint and contribution to overheads through energy production. Effluent from the distillery is processed by a series of anaerobic bacterial populations within a controlled environment to enable compliance within the discharge consent.
Methane rich biogas is produced and stored within an inflatable hood and processed for
contaminants such as H2S and continuously fed to a CHP (combined heat and power) unit. Electricity is fed into the national grid, thus benefitting from preferential Feed in Tariffs, whilst heat energy is used within the factory as well as operating the AD plant itself.
combines pre-acidification with high/low load mechanisation plus clarification under one roof. In this way the bacteria compete for the feedstock for optimum efficiency and under ideal micro environmental conditions provided by the plant.
SKJÖLDGAS®
The result for William Grant & Sons is efficient effluent purification and energy production. Not to mention of course the contribution to reduced greenhouse gas emissions.
SKJÖLDGAS® aerobic and anaerobic process solutions
is a patented AD process developed by Dr. Reinhart Von Nordenskjöld who is the founder of the BIOLAK Group, a world leader in Reader Reply Card No 42
is also ideal for use as part of a treatment train solution for SUDS schemes, for example as an alternative to a sediment forebay, or to provide protection for a detention basin or pond. comprises a reinforced concrete chamber with internal polypropylene components and no moving parts. The unit is designed to induce a rotational flow pattern with a low headloss,
also incorporates the option to change outlet pipe direction as needed, meeting Building Regulations requirements without the need to construct
www.pollutionsolutions-online.com • February / March 2011
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