Water and Effluent Treatment Magazine
Issue link: https://read.utilityweek.co.uk/i/805302
april 2017 WET NEWS 13 april 2017 WET NEWS 13 events.utilityweek.co.uk/wales Expert speakers include: Follow us @utilityweek using #walesenergy Prys Davies Deputy director, energy, water & fl ood Welsh Government Graham Edwards Chief executive o cer Wales & West Utilities Greg Evans Safety & generation director Horizon Nuclear Power Mike Unsworth Director of construction & engineering Tidal Lagoon Power Dr Mike Pedley Head of energy Dŵr Cymru Welsh Water Chris Clarke Director of asset management and HS&E Wales & West Utilities David Jones Chief executive o cer Pembrokeshire Coastal Forum; director Marine Energy Wales David Club Director Renewable UK Cymru The only dedicated event for energy generation, retail and networks stakeholders in Wales This conference will provide you with: ● Updates on the future of energy networks from Ofgem ● Details of the Government's priorities for Wales' energy sector ● Case studies on the most effective carbon and cost reduction initiatives ● Cutting-edge developments in energy generation from tidal, nuclear and more ● Innovative ways to drive energy developments in Wales ● A strategic view of where Wales' energy sector is globally Supported by UW-WalesEnergy17brochure.indd 1 29/03/2017 11:57 compliance at this very sensitive site with immediate receptors. Terminodour is CSO Technik's low voltage oxidation and ionisation system technology that has now been granted Best Available Technology (BAT) status for odour abatement in the latest dra•s of BREF documentation for the waste and wastewater industries. CSO's design was based on delivering ionised air directly into the wet well where it would oxidise odours, which had been identified as being H2S primarily. During a storm event the deep sha• wet well fills and the odour emitted meets the blanket of ionised air within the tank, and the oxidation reaction commences. As the tank fills, air is also extracted from the tank and is fed via a range of ductwork into the activated carbon system which would provide a final polish to any residual odours not oxidised by the Terminodour system prior to emission to atmosphere. Particulate removal In order to minimise the size of the Terminodour air handling unit (AHU), the standard module sizes were dispensed with and a purpose-built model was designed to fit into the available space. The specially designed AHU houses a filter section for particulate removal, fan and the plasma reaction chamber with its ionising modules. Due to the close proximity of the sea wall and the potential for salt and sand ingress a special filter was included within the design. The AHU unit measured just 2,865mm x 1,910mm x 1,155mm high. Low energy consumption is another benefit of this particular system and the total power consumption is less than 3kW. The activated carbon system was based on a cartridge system to allow easy access to remove and replace spent carbon in the enclosed environment. The carbon filter housing measures just 1,000mm x 1,900mm x 1,650mm high. The carbon filter is linked to the wet well by a range of uPVC ductwork and duty / standby extraction fans with an extraction capability of 2,350l/s. The treated air is emitted via a stack. Normally both the Termin- odour unit and activated carbon system are supplied pre-assembled in order to minimise site installation time. However, because of the limited space within and access to the building both the carbon system and the Terminodour system were supplied only part assembled for final assembly on site. Post installation per-formance monitoring was undertaken by an independent third party which the system passed. CSO Technik is experienced in designing odour control systems where the available footprint is severely limited. Recently, the company was awarded three major schemes for Terminodour in the waste to energy sector where the standard biofilter solution would have taken up more space than was available. Normally, a biofilter will require 1m3 of media for every 100m3 of air treated, therefore a system with an extraction rate of 40,000m3/hr will require 400m3 of media. It is advisable not to exceed a media height of 2m so the footprint would be about 200m2 excluding fans and ductwork. A Terminodour system for the same treated air volume will require less than 20m2 making it a suitable odour abatement solution for applications with significant space constraints. THE VERDICT post installation performance monitoring was undertaken by an independent third party which the system passed NEED TO KNOW 1 odour generation was measured as being in the region of 200oUe/ m2/s 2 During a storm event the deep shaft wet well fills and the odour emit- ted meets the blanket of ionised air within the tank 3 internal space was limited and ruled out any large footprint solution 4 a Terminodour system for the same treated air volume will require less than 20m2 THE CONCEPT • Terminodour is a low voltage oxidation and ionisation system technology • The system is used without additional abatement stages but in this case a polishing activated carbon stage was needed to ensure compliance • To minimise the size of the Terminodour aHU, a purpose-built model was designed to fit into the available space • The activated carbon system was based on a cartridge system to allow easy access