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> Enva Ireland News > Enva Launches Geotube Dewatering Solution
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Enva Launches Geotube Dewatering Solution
Date: 01 May 2009
| Enva has announced the addition of Geotube® dewatering technology to its product range. Working in conjunction with RJ Mooney Ltd and Tencate Geotube®, this new offering provides a low-cost high-volume dewatering solution to industries ranging from; pulp and paper, power generation, agriculture, mining, mineral processing, lake/river/canal waters as well as wastewater. |
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| The Geotube® bag 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. |
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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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| 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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| Finbarr Pyne, Technical Development Director at Enva adds: “As can be seen from these results, the treated liquid has a high total nitrogen value and a low total phosphorus value making it more suitable for landspread in comparison to conventional slurry. This is due to the significant overall reduction in pollutant matter and the easier overall uptake by the soil due to the lower solid content of the effluent”. |
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| Geotube® Technology provides an ideal high volume low-cost solution specifically designed for liquid solid separation in isolated or remote areas. According to Enva, the key attributes of this technology include; low capital costs, no moving parts, such as belts or gears, etc, a hydraulic capacity as well as a dewatering mechanism, and reduced capital costs on storing dewatered material. Unlike most substitute technologies, this system does not have high maintenance or very high depreciation costs. It is easy to run and does not require extensive supervision when operating, while chemical running costs are also low, as the system is not a moving/spinning dewatering device. Bag size and capacity can vary to meet all individual requirements, and when filled, each Geotube® bag can last between 20 to 50+ years on-site. |
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| Finbarr Pyne commented; “Combined with Enva’s expertise in effluent treatment, dewatering through Geotube® Technology can become a passive event creating options and opportunity for operations within the agricultural and other sectors. This solution also offers a cost-effective and less technical system than other conventional dewatering mechanisms, and offers significant benefits in terms of capital cost, revenue cost, technical input, storage requirements, depreciation and maintenance costs and labour input”. |
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| To view a case study conducted by Enva regarding Geotube technology, please click here >>> |
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