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  • Introduction to aerators
    Aeration systems increase the supply of oxygen, as well as providing mixing, in the biological treatment processes commonly used to treat municipal wastewater and industrial effluents. They are typically installed in mixing tanks, activated sludge tanks, equalisation basins, sequencing batch reactors (SBRs) and aerated lagoons. Fine bubble...
    Guidance, 06 December 2012
  • Introduction to tank and bund liner membranes
    Tank and bund liners are used in primary or secondary containment applications. In primary containment, the membrane is used to line the tank itself. It must be specified in a material that is suitable for the liquid stored, be it potable water, chemicals, fuel, wastewater or industrial effluent. Butyl, EPDM, PVC, polypropylene and polyurethane...
    Guidance, 10 December 2012
  • Introduction to fragances and eradicating agents
    Airborne odour control systems are used to reduce, neutralise or eliminate unpleasant smells and air pollution from wastewater and water treatment works, landfill and composting sites, waste transfer stations, farms and factories. Air freshening equipment is also available for installation in public toilets and commercial kitchens. Systems use...
    Guidance, 07 December 2012
  • Introduction to chemical dosing systems
    Chemical dosing systems typically comprise a chemical storage tank, pipework, controls and a frame or cabinet, as well as one or more metering pumps. They can dose liquids, powders or polymers. One common application is the addition of additives, dyes, colourings or flavourings in food processing, cosmetics or pharmaceutical applications. Another...
    Guidance, 07 December 2012
  • Introduction to sanitary / hygienic pumps
    Sanitary or hygienic pumps are used for handling sterile and ultrapure materials in the food processing, dairy, pharmaceutical, cosmetics, biotechnical and medical industries. Air operated double diaphragm, centrifugal, liquid ring, progressing cavity and rotary lobe pumps are all available to meet sanitary criteria. They are typically made from...
    Guidance, 10 December 2012
  • Introduction to dewatering presses
    Dewatering presses are one of several solids / liquids separation technologies used to treat municipal and industrial sludges and other waste materials. By reducing the volume of the solid material, disposal costs can be greatly reduced. With belt filter presses, a chemically treated sludge is sandwiched between two belts that pass through a...
    Guidance, 07 December 2012
  • Introduction to clarifiers
    Clarifiers are tanks that encourage solids to separate out of wastewater and industrial effluents. Light materials float to the surface and are removed by a skimmer, whilst heavier solids settle on the bottom of the tank. In circular tanks a rotating scraper guides sludge to a removal point, and in rectangular tanks a collecting chain does the...
    Guidance, 07 December 2012
  • Introduction to water / effluent treatment
    Both municipal wastewater and industrial effluent are subject to strict UK and EU legislation regarding their disposal. Companies are required to meet criteria set out in discharge permits. Biodegradable organics, suspended solids, and fats, oils and greases (FOGs) must be removed, acids and alkalis neutralised and toxic materials isolated...
    Guidance, 07 December 2012
  • Introduction to mixers
    Mixers are used to mix, blend, homogenise, agitate and aerate both liquids and solids in a range of sectors, from wastewater treatment through to food processing. Dynamic liquid mixers use propellers to provide local turbulence and drive bulk flow within a tank or lagoon. Slow speed versions are best suited to low viscosity fluids; higher speed...
    Guidance, 07 December 2012
  • Introduction to air / gas purification
    Indoor air quality (IAQ) can be compromised by micro-organisms, dust, fumes, smoke, gases, such as CO2, and volatile organic compounds (VOCs), as well as other airborne particles. Such polluted conditions may be immediately harmful to health or cause longer term problems, including increased absenteeism, a lack of concentration amongst employees...
    Guidance, 06 December 2012
  • Introduction to biological treatment
    Biological treatment systems are commonly used to treat municipal wastewater and sewage, as well as sludge and industrial effluents. Biological systems use bacteria, in either aerobic or anaerobic conditions, to break down organic matter into carbon dioxide and cellular mass. Packaged treatment plant are typically suitable for population...
    Guidance, 06 February 2015
  • Introduction to industrial compressors
    Compressors move gases, including air, processes gases and waste gases, using a large increase in pressure. Blowers, by contrast, move gases using a moderate increase in pressure. Compressors are used in all industries. Applications range from propelling gases through pipelines to powering pneumatic tools. They are also important components of...
    Guidance, 07 December 2012
  • Introduction to metering and dosing pumps
    Metering and dosing pumps are widely used in water treatment processes, as well as chemical processing, food and drink manufacturing, pharmaceuticals, pulp and paper production and laboratories. They are used for delivering precise quantities of chemicals, including aggressive acids and alkalis. Some pumps are designed for handling high purity...
    Guidance, 10 December 2012
  • Introduction to gas dosing systems
    Gas feed systems are used to treat water and wastewater in municipal and industrial processes. The safest systems tend to operate on all-vacuum principles. Chlorinators disperse chlorine into water and wastewater in a reliable manner. Applications include disinfection, sterilisation, odour control, bacteria control, algae control and colour...
    Guidance, 10 December 2012
  • Introduction to inspection services
    Inspection services can range from structural building surveys to on-site testing for specific parameters such as condensation. Buildings or civil structures such as foundations, culverts, tanks and pipes can be tested for maintenance or safety compliance. Surveyors may simply carry out a visual inspection or use special measuring equipment to...
    Guidance, 07 December 2012