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> Enva Ireland News > New Technologies Open Day
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New Technologies Open Day
Date: 12 June 2008
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On THURSDAY 25TH JUNE, Enva is holding a NEW TECHNOLOGIES OPEN DAY at our Cork facility (Monkstown Road, Ringaskiddy) from 9am to 7pm.
This open day will showcase and offer information regarding a range of new technologies such as leachate oxidation, aqueous pharmaceutical waste oxidation, spruce filtration, electro-coagulation, geotube dewatering, and activated oxygen and photoionisation, as well as a number of others - all of which are offering new and significant environmental advantages and cost efficiencies.
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| If you would like to attend this event, please send us a brief email to confirm your attendance by clicking here >>> |
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MAP & DIRECTIONS
You can download a map and directions for our Cork facility by clicking on the relevant links. Both files are in PDF format.
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CIWM ROI Centre CPD Approved Event |
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MORE INFORMATION
For more information on the new technologies being showcased at this open day, please click on the relevant links below. Alternatively, you can contact our Cork office on 021 4387200 of at cork@enva.ie
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Leachate Oxidation
Landfill leachate is a difficult material to treat using conventional technologies. It contains hard COD (non-biodegradable), ammonia and heavy metals typically, which makes normal biological treatment processes such as activated sludge ineffective. Moreover, leachate can be highly detrimental to the bacteria in these processes. As we understand, the licensing of local sewage plants is currently under review. This may affect the ability of local sewage treatment plants to accept or treat leachate. |
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| Enva is piloting technologies used extensively in Spain for the treatment of landfill leachate. These plants can incorporate oxidation for the treatment of COD, ammonia scrubbers and metal removal systems if necessary. The treated effluent may be suitable for direct discharge, or for further treatment in a biological plant. |
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| We have had excellent results so far at laboratory level for the breakdown of leachate, with indications showing that we can get > 95% COD removal if necessary. |
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Aqueous Pharmaceutical Waste Oxidation
The Pharmachem industry produces a wide variety of wastes, which cannot be treated at on-site facilities at present. This includes low CV (aqueous) wastes (typical EWC 07**01), which are exported for incineration at very expensive rates. |
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Enva are currently examining opportunities presented by alternative support technologies such as advanced oxidation, which can remove these materials, or transform them into biodegradable materials that can be then treated in an on-site biological effluent plant
Results to date in the breakdown of complex organics have been excellent. |
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Spruce Filtration
The Spruce filter is described as new generation deep bed multi-layered filtration.
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| It has been designed for the treatment of water, wastewater and brine to remove suspended solids contamination, as well as pathogenic micro-organisms. It can remove and retain a wider range of particle size than many other current designs of deep bed filter, and can remove solids down to 0.5 micron. |
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| The Spruce filter bed comprises of four layers of inert particulate matter, giving a hydraulic stability that allows solids accumulation much more effectively than for example conventional sand filters. The higher filtration rates and longer filter runs that can be obtained using the spruce filter can provide substantial capital expenditure savings |
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| Applications include inlet water treatment, wastewater treatment, pre-treatment for membrane systems and much more. |
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Geotube® Technology
Geotube® Technology is a worldwide renowned brand offering low-cost high-volume dewatering solution to industries ranging from; pulp and paper, power generation, mining, mineral processing, lake/river/canal waters as well as wastewater.
It uses a high performance filtration fabric produced from moulded yarns with fine membrane pores allowing excess liquid to drain away into a receiving tank. Geotube® bags are manufactured in a range of widths and lengths to suit all applications. |
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| Recent trails and case studies conducted by Enva focussing on the agricultural sector show that this solution can provide an efficient and high volume solution for dealing with animal slurry, while facilitating compliance with existing and impending legislation under the Nitrates Directive, IPPC legislation, and the Water Framework Directive. Laboratory tests conducted by Enva showed the following results; 98.5% reduction in total phosphorus, 95.4% reduction in biological oxygen demand, 95% reduction in suspended solids, 94.4% reduction in chemical oxygen demand, and 60% reduction in total nitrogen. |
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| The solution developed for the agricultural sector focuses on two main constituents; mixing / treatment, and dewatering. Through its research and engineering functions Enva set about designing and manufacturing a mobile dewatering unit specifically for this application. In addition to the Geotube® bag, other support equipment supplied and installed by Enva included batch and continuous polymer make-up systems, dosing system for coagulation and phosphorus removal, submersible pump for transferring and re-circulating the animal slurry, control panel, and all necessary pipe-work. |
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Electro-coagulation
In July 2008, Enva commissioned its first electro-coagulation plant at the Waterford Crystal facility in Waterford. Conceptualised, designed, constructed and commissioned by Enva, such a plant is unique to Ireland and the UK and offers the potential to reduce industrial water consumption by as much as 90%.
Electro-coagulation brings about the coagulation of suspended and dissolved particles in water by applying an electric field, which binds these particles together and forming larger particles that will settle out of the water.
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| After a complex series of chemical processes to coagulate (change into a thickened mass) and flocculate (separate a solid from a solution) suspended solids, the addition of polyelectrolyte completes the flocculation and leads to separation of clear water and flocculated aluminium hydroxide and suspended solids. |
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Activated Oxygen and Photoionisation
Activated oxygen and photoionisation are at the cutting edge of effective odour control technologies. The latter offers several advantages over biofilters including: small footprint, easy installation and operation, low maintenance, ability to treat highly fluctuating concentrations of contaminants, and ability to cope with highly humid streams. Even off-gases that contain toxic or non-biodegradable compounds can be treated by photoionisation. |
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| Activated oxygen can be applied inside of buildings to purify room air and improve working conditions. Typical applications include dewatering sludge rooms, sludge storage tanks, headworks, etc. Contaminated air is drawn into the treatment unit, where high voltage ionisation tubes are located, which produce highly reactive oxygen. Clean, fresh air is produced by the inactivation of molecular odours, germs and harmful substances. |
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| Photoionisation is based on the interaction of ultraviolet (UV) light and a catalytic converter. This technology is usually used for applications that consist of highly contaminated off-gas streams. The process removes oxidisable contaminants (such as hydrogen sulphide, ammonia, mercaptans and hydrocarbons) and eliminates odour. Strong oxidants (such as oxygen radicals and hydroxyl radicals) are produced by UV, and the linkages of odour molecules are broken up. Some of the contaminants are oxidised immediately, while others are adsorbed to the surface of the catalyst and are degraded through the interaction of the catalyst and UV light. The catalyst acts as a downstream polishing buffer for peak loads. |
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| If you would like to attend this event, please send us a brief email to confirm your attendance by clicking here >>> |
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