STRIAL NEWS Enviro-X reduces than 95%
waste
An Enviro-X ultrafiltration system installed at Johnson & Johnson Medical in the UK has enabled the company to reduce liquid waste volumes from print cleaning operations by more than 95%. As a result the company has been able to make savings in disposal costs and to dispose of the waste in an environmentally acceptable manner. Johnson &Johnson Medical runs a series of six Multivac packaging systems, handling a range of medical dressings. Each line incorporates built-in printing systems, which are cleaned on a daily basis. The waste wash waters generated contain high levels of diluted ink from the printers which, under EC legislation, cannot be discharged directly to the drainage systems and must be disposed of in a controlled manner.
by more Prior to the introduction of the Enviro-X ultrafiltration system, the waste wash water was stored in forty-five gallon containers and then removed by a licensed contractor for disposal at landfill sites. Typically, Johnson &Johnson would dispose of between two hundred to three hundred containers each year. Since the installation of the Enviro-X system, which separates and concentrates the diluted inks from the wash water, the company has been able to reduce the number of containers from around two hundred to approximately ten per year. The Enviro-X ultrafiltration element comprises of thousands of hollow polysulphone fibres, packed into a tubular housing. During operation, the liquid waste is pumped longitudinally through the core of the hollow fibres. The permeate passes out through the pores of the fibres, while the ink particles and any other solids, oils or greases are rejected by the membrane and are retained within the core of each hollow fibre. The cleaned permeate is ducted away from the Enviro-X for disposal to the Sewerage system, while the inky sludge retained by the fibres is collected in a holding tank and held until there is a sufficient quantity to fill a container. KaLsep Limited, Doman Road, Yorktown Industrial Estate, Camberfey, Surrey. GUI5 3DF, UK Tel: f44 1276 675675; fax: + 44 1276 676276.
Largest
O2 plant-exported
The largest pre-fabricated oxygen production plant ever built in the UK has been exported from Humberside to a chemical plant at Tjeldbergodden on the Norwegian coast. The main component is a 420 tonne, 70 metre high structure designed by BOC Process Plants at Guildford. It contains equipment built in the company’s specialist north London works and is encased in a steel ‘cold box’ fabricated adjacent to the docks in Immingham. This outer structure, when insulated on delivery, will help keep the equipment at the operating temperature of under -170 degrees Centigrade. The plant will make in excess of 1000 tonnes of oxy gen a day for use in converting 824
methane from the North Sea into methanol for use in the plastics, petroleum and chemical industries throughout Europe. The process works by cooling atmospheric air to the specific temperatures at which oxygen, nitrogen and argon liquefy and can be separated into individual gases. BOC Processes Plants were awarded this new business by a consortium consisting of Statoil, Conoco and AGA. A key factor in the decision was BOC Process Plants application of the latest energy saving technology. BOC Process Plants Engineering Centre, 30 Priestley Road, Guildford, Surrey GlJ2 5YH UK. Tel: +44 1483 300900, fm: f 44 1483 302007
Dynamic
Membrane
Filtration
A major advance in the field of cross flow processing known as dynamic membrane filtration, is explained in a technical report from Pall Ultrafine Filtration Company. Many traditional separation processes for biotechnology effectively separate cells and cell debris, but hold back valuable protein molecules. Dynamic membrane filtration has demonstrated protein recovery rates in excess of 90% in the filtrate. The report explains how the DMF Dynamic Membrane Filter system operates by creating shear forces at the membrane surface, which lift contami-
Scottish first
pang, 25 Harbor Park Drive, Port Washington, NY 11050 USA. Tel: + 1 516 484 3600, .f?Ix: + 1 516 484 3637.
Power chooses
Scottish Power, the Glasgowbased power utility, has awarded Lurgi (UK) Limited, a turn-key contract to retrofit the gas cleaning equipment at its Methil Power Station. Lurgi low pressure bag filters offer very low particulate emission levels. The expected outlet emission from Methil after conversions will be less than 10 mg/m3. The contract will comprise of removing the existing precipitator internals and retrofitting a Lurgi low pressure bag filter within the casing. The scope of the project will also include fan modification
Large-format
element
air filters
Lurgi for UK bag filter and the installation of a bag pi-e-coat system. The work will be completed this year. The retrofit on the 2 x 30MW coal slurry burning boilers will follow similar installations carried out in Australia and South Africa where bag filter technology has been chosen in preference to electrostatic precipitators for use with low sulphur coal feeds. The Lurgi low pressure filter has been applied to boilers of up to BOOMW. Luryi (UK) Limited, Dukes’s Court, Duke Street, Waking, Surrey, GlJ21 5BH, UK; Tel: +44 1483 1483 73044; fax: +44
729595.
provides
Fluid Systems claim that its new TFC Magnum is the only reverse osmosis element to combine large-format packaging with the high performance of thin-film technology. At 60” long, the TFC Magnum is 20” longer than standard-sized elements and capable of producing 50% more flow. The packaging efficiency of element means that fewer elements are required, resulting in fewer internal connections. In
lnterfilta
from Pall
nants away and prevent their penetration of the medium. Dynamic filtration eliminates the “catch-22” situation of conventional cross flow filters: when cross flow is increased to prevent fouling, the upstream pressure gradient increases resulting in higher flow rates and an acceleration in fouling. In dynamic filtration the liquid shear forces can be increased independent of the flow rate through the membrane. Pall Ultra&e Filtration Com-
50% more flow
addition, its increased membrane surface results in high productivity without increased operating pressure. The TFC Magnum is available in 4” and 8” diameters. The Model 4830 provides 3200 gpd of flow, and the Model 8832 is rated at 13 000 gpd. Both models provide 99.5% salt rejection. F’luid Systems Corporation, 10054 Old Grove Road, Sun Diego, CA 92131, USA. Tel: +1 619 695 3840, fbx: + 1 619 695 2176.
for Old Trafford
Interiilta air filters are being used to clean the air at Manchester United’s world famous stadium at Old Trafford. The executive rooms, suites and administrative areas, which adjoin the stadium, are being supplied with a clean air supply using Interfilta filters. A selection of panel filters and rigid pack filters are being used with the building’s air October
conditioning piant. The rigid pack filter is particularly suited for use with variable air volume (VAV) systems, since the rigid housing will not be affected by changes in air velocity. Inte@ilta [UK) Ltd, Rossendale Road Trading Estate, Famington Roud, Bwnley, BBll +44 1282 406875, 1282 416875. 1995
Filtration
5SY: Tel: fax: + 44
& Separation