Brown N.W.,Arvia Technology |
Roberts E.P.L.,University of Calgary
Water Science and Technology | Year: 2013
Coupling of adsorption with electrochemical oxidation is a novel approach to the treatment of aqueous organics that has demonstrated a number of key benefits over the individual application of these processes. This is based on a highly conducting adsorbent material, developed under the trade name Nyex™;, that is able to rapidly adsorb the organics and anodically oxidise them within a single treatment unit. Successful scale up of the process (in both continuous and batch operation) has been achieved for the polishing of two separate groundwaters (one containing relatively simple petrol, diesel and their degradation products and the other with a range of more complex organics). Treatment showed that low discharge consents can be achieved, including the removal of more complex and difficult to treat compounds to below the limits of detection. Energy consumption for electrochemical regeneration was relatively low (down to 0.5 kWh/m3) suggesting that the process could be a practical alternative approach for effluent polishing. © IWA Publishing 2013. Source
Agency: GTR | Branch: Innovate UK | Program: | Phase: Feasibility Study | Award Amount: 105.84K | Year: 2015
Some of the most significant radioactive risks are present in the legacy fuel storage ponds at Sellafield. These are 50 - 60 years old and are in need of major attention. However, the presence of algal and bacterial blooms in these ponds is hindering in the retreival process, slowing down the rate of reducing the hazard. This project will aim to provide a novel treatment approach by using a subersible system to treat the water. Based on the Arvia process of adsorption coupled with electrochemical oxidation, this approach has the benefit that it requires no space around the tanks (which are heavily congested); does not require the removal of radioactive water from the tank (reducing risk); makes use of the existing tank and water (reducing shielding requirements) and will require minimal operator involvement (minimising operator dose). In addition if this treatment process is proven for a site like Sellafield, it opens the market for this technology for other nuclear operators. A key possibility would be the treatment of water stored in the storage tanks at Fukushima, where a large number of units could be deployed to make the tank water suitable for further treatment.
Arvia Technology | Date: 2013-07-10
The apparatus comprises a treatment reservoir defining first and second treatment zones separated by a porous membrane. Carbon-based adsorbent material capable of electrochemical regeneration is provided in said first and second treatment zones. An agitator is operable to distribute the adsorbent in aqueous organic waste liquid contained in the first and second treatment zones. First and second electric current feeders are operably connected to the adsorbent in the first and second treatment zones respectively. A controller operates the electric current feeders to pass an electric current through the adsorbent in the treatment zones in one direction to regenerate the adsorbent in one of the treatment zones and to then reverse the direction of the current applied to the adsorbent to regenerate the adsorbent in the other treatment zone. Further apparatus is described which facilitates aqueous waste water treatment in a continuous manner.
Arvia Technology | Date: 2015-01-15
Arvia Technology | Date: 2010-11-03
A method for the treatment of a liquid. The method comprises contacting the liquid within a treatment zone with an adsorbent material, which is then electrochemically regenerated within a regeneration zone following contact with said liquid. A disinfectant precursor species is provided within the regeneration zone and then electrochemically converted to a disinfectant species which can then contact adsorbent material and/or liquid within the regeneration zone effecting in-situ disinfection and resulting in the presence of residual disinfectant species in the treated liquid. There is further provided apparatus for carrying out such a method.