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Increasingly, feed manufacturers are being required to address the issue of release of odour and harmful contaminants into the surrounding community.
Digital Re-print - September | October 2011 Direct Cold Plasma: The innovative answer to odour control in the food and feed industry Grain & Feed Milling Technology is published six times a year by Perendale Publishers Ltd of the United Kingdom. All data is published in good faith, based on information received, and while every care is taken to prevent inaccuracies, the publishers accept no liability for any errors or omissions or for the consequences of action taken on the basis of information published. ©Copyright 2010 Perendale Publishers Ltd. All rights reserved. No part of this publication may be reproduced in any form or by any means without prior permission of the copyright owner. Printed by Perendale Publishers Ltd. ISSN: 1466-3872 www.gfmt.co.uk NEXT PAGE FEATURE FEATURE In most cases in the feed industry, the emission tem- perature from dryers will be less than this temperature limi- tation. Maintenance is minimal, if the unit is used as a dust collector as well as odour abatement system, then the unit would have a ‘wash-down’ maybe once per week and an internal inspection once a month would be recom- mended. Operating costs are and charge carriers. This is actually identi- very low and mostly associated with the handle 1600m³/h and tests were repeated cal to what happens with pollution in the cost of electricity; 10-20kW for a standard to check validity. Independent Olfactometry atmosphere. Reactions occur with the odour 20,000m³/h cold plasma unit. testing was used as a means of determining bearing compounds in the gas to be treated. A costing exercise produced by one of odour reduction efficiency. Ambient air may be injected just prior to the APP’s customers, is shown below. This is Test results indicate that odour removal reaction chamber to optimise humidity and based on a 10-year period, including both efficiencies of up to 90 percent are achiev- temperature as well as adding ions to the investment and operating cost for a volume able within the food and feed industry and gas stream. of 20,000m³/h. The operating costs for the that the standard colds plasma module will Direct Cold Plasma: In essence the cold plasma process scrubber alone or scrubber biofilter do not handle around 20.000Am³/h. encourages ‘oxidation’ of the odour bearing include cost of water. Higher efficiencies may be achieved by compounds at low temperature by creating using a final polishing module. During testing, discharge (cold plasma). Testing in the petfood and fish both high and low odour concentrations A closed-loop cooling unit ensures that feed industries were experienced; nonetheless cold plasma The innovative answer to odour control in the food and feed industry operating conditions within the high voltage generator are maintained within controlled Since 2003, extensive testing with a pilot system both on extrusion flash-off, driers and achieved real odour reductions even on very low inlet concentrations, something limits. A proprietary control system moni- coolers has been carried out. All possible that is not always the case on alternative by Havard vetrhus, Director Sales & Marketing, Applied Plasma Physics AS, tors the high voltage passed to each of the variables have been reviewed to determine technologies. Norway Tel: + 47 5160 2220, Email: email@example.com corona wires in the reaction chamber, and the optimum operating conditions for the Overall the tests indicated that the cold controls the voltage modulation that gener- cold plasma system. plasma unit operated most effectively with- ates the cold plasma. out a scrubber either at the inlet or outlet. I ncreasingly, feed manufacturers are being • End of pipe solution with APP (Applied Plasma Physics AS). The system also detects arcs between the Variables tested: Dust removal was very effective (99% reduc- required to address the issue of release • Low running cost APP is both an R&D and equipment sup- corona wire and the cell wall, automatically • Residence time (determines volume to tion). of odour and harmful contaminants • Minimal maintenance ply company, specialising in the application shutting down electrical supply for a fraction be handled by a standard module) As a result of these tests, several petfood into the surrounding community. • Ability to operate at normal feed of high voltage technology and non-thermal of a second before power is reinstated. • Effects of water scrubber at inlet or sites have now installed cold plasma technol- manufacturing temperatures, to avoid plasma systems for industrial processes. APP The reaction chamber may be oper- outlet of cold plasma ogy for their processes. As per today, 50 Local communities, special interest groups cooling costs has now delivered more than 200 systems, ated with the gas flow passing upwards or • Cold plasma unit operating alone units are in operation in the petfood industry, and government legislation all bring pressure • High odour removal efficiency most running on difficult applications. downwards depending on site layout. The • Adding water to humidify inlet or outlet a figure that will increase substantially in the to bear on factories to minimise real or • No chemical additions and need to APP has experience on ultra high odour unit is capable of operating on emissions with gas years to come. perceived risks of contamination. maintain chemistry applications – where odour levels can be relative humidity close to 100%, although • Air infiltration volume (ion enrichment) The experience of the environmen- There are no universally applied standards • No liquid effluent waste over 200,000 odour units per m³ - and the the closer to 100% RH the unit operates, • Intensity of cold plasma generation tal needs of the feed industry, and APP’s for odour or Volatile Organic Compounds • Instant on/off – no warm up time company achieved odour removal efficien- the higher the possibility of arcs and conse- • Geometry and arrangement of reaction approach to innovative design is combined (VOC) emissions, and to provide solutions • Modular construction, ease of relocation cies of up to 97 percent. Another advantage quently risks of reduced efficiency. cells to offer a competitive alternative solution to that fit specific factory needs can be com- if change of production location and that is unique for this specific technology is The unit can be operated with emission a problem that is of increasing significance to plex. There is no single solution but under- ease the ability to add on modules that both odour and dust are removed from temperatures up to 70°C. The pilot plant (test unit) is designed to the food and feed industry. symaga_quarter page_IAFD2011 13/5/11 10:09 Page 1 standing the feed manufacturers problems according to required capacity the production emissions. certainly helps a great deal. • Competitive capital cost In recent years, there have been numer- Cold plasma technology – Nature ous changes regarding where production This is a tall order but there is a technol- in a box www.symaga.com facilities are situated. Factory closures and ogy can answer most of these needs: Cold Odour bearing gases enter the cold relocation of manufacturing units has become Plasma. plasma module, where care is taken to dis- commonplace. tribute gases evenly as it enters the reaction At the same time A high tech, high voltage chamber. The reaction chamber comprises a urban sprawl has resulted solution cluster of hexagonal cells. Running centrally in residential areas being In 2003 a global petfood manufacturer through each cell is a corona wire, which is "Over 20 years of experience in the design, construction built closer to previously tested a new technology for odour removal, isolated from the rest of the chamber. and supply of storage solutions, worldwide" remote industrial areas. referred to as Direct Cold Plasma, on drier The high voltage generator distributes Another pressure companies face is meeting and extruder flash-off exhausts. a modulating high voltage supply to each ALL TYPES OF SILOS INSTALLATIONS TO COVER THE MARKET NEEDS local environmental needs. The technology had obvious advantages corona wire, and this process results in a So what does the industry need from over more conventional solutions. As a result discharge between the corona wire and the Silos for seeds, cereals, malts, oil seeds (soya, sunflower, rape, ...), pellets, meals, rices, and in its odour abatement equipment? This is a the petfood manufacturer looked for a suit- cell wall. general, products for agriculture, agrifood industry, biofuels, and biomass (wood pellets, ...) complex question and the answer needs to able technology partner for collaboration on The discharge promotes the emission include: the application of cold plasma on petfood with high-speed electrons, which collide Ctra. De Arenas, km 2,300, 13210 Villarta de San Juan. Cludad Real - Espana • A compact design minimising space applications. with background gas molecules creating www.symaga.com firstname.lastname@example.org requirements In 2003 they formed such an agreement chemically active species known as radicals Phone: +34 91 726 43 04/ +34 926 64 04 75 Fax: +34 91 361 15 94/ +34 926 64 02 94 26 | September - october 2011 Grain &feed millinG technoloGy Grain &feed millinG technoloGy September - october 2011 | 27 Built by feed millers for feed millers. Equipped with the industry‘s most efficient drive system, the new Bühler pellet mill Kubex™ T saves up to 20% of energy – while boosting line capacity to up to 80 tons per hour. With the Kubex™ T you save costs, reduce your carbon footprint and make your operation even more productive. Gaining competitive advantages has never been easier. For more information please visit www.buhlergroup.com/kubex-t Bühler AG, Feed & Biomass, CH-9240 Uzwil, Switzerland, T +41 71 955 11 11, F +41 71 955 28 96 email@example.com, www.buhlergroup.com Kubex™ T pellet mill. Developed in close cooperation with leading feed millers. Direct drive concept. Saves up to 20% of energy compared to conventional drive systems. Variable die speed. Formulation- specific optimization of production process and pellet quality. Up to 585 kW motor power. Boosts line capacity to up to 80 t/h. Belt- and gearless drive system. For minimum maintenance and ultimate machine availability. ABS control for press rolls. Prevents roll slippage and protects machine against blockages. 360° accessibility. Wide-opening sliding doors on both sides. The world’s most compact design. Fits anywhere and everywhere. Almost double capacity with same footprint as conventional pellet mills. Innovations for a better world. This digital Re-print is part of the September | October 2011 edition of Grain & Feed Milling Technology magazine. Content from the magazine is available to view free-of-charge, both as a full online magazine on our website, and as an archive of individual features on the docstoc website. LINKS Please click here to view our other publications on www.docstoc.com. October 2011 • See the full issue • Producing Flaked breakfast Cereals In this issue: • Sample • Visit the GFMT website preparation of feeds and forage for NIR analysis • Contact the GFMT Team • Milling Technology Redefined • 15-Year Celebration: Fortifying with folic acid prevents 22,000 birth defects annually • Direct Cold Plasma: • Subscribe to GFMT The innovative answer to odour • Global Feed control in the food and feed Markets: industry Wheat supply grows and grows as corn crop shrinks A subscription magazine for the global flour & feed milling industries - first published in 1891 GFMT11.05.indd 1 04/10/2011 15:14 To purchase a paper copy of the magazine, or to subscribe to the paper edition please contact our Circulation and Subscriptions Manager on the link adove. 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