English Arabic Chinese (Simplified) French German Greek Italian Polish Portuguese Russian Spanish
  • This email address is being protected from spambots. You need JavaScript enabled to view it.
  • +44 (0) 161 877 2334

Membrane Separation Technologies - Techniques for Minimising Wastes & Effluents

Membrane Separation Technologies - Techniques for Minimising Wastes & Effluents

Many industrial processes generate effluent streams that contain a mixture of substances. To reduce the cost of processing these streams, operators can remove the substances that they contain using a range of membrane separation technologies.

Using separation technologies as part of the production process - for instance as a method of cleaning continuously re-circulating process water - can prove more cost-effective than using a larger effluent treatment plant. It is an approach that usually requires less energy and: is less capital-intensive in terms of plant; allows the recovery and re-use of individual substances, many of which may be valuable; retains water of an appropriate purity within the process so that it can be recycled.

This guide describes proven technologies and techniques for the cost-effective separation of four types of dissolved substance from liquid streams:

  • heavy metals;
  • anions (metals and non-metals);
  • organics;
  • water in organics.

It also considers the separation of gases and liquids.    

Environmental best practice

This guide is intended to help companies decide whether separation technology can be used to minimise their waste streams and, if so, to indicate the most appropriate technologies available.

For each of the technologies examined, this guide first discusses the general principles of the technology, its typical applications, main advantages and disadvantages and approximate costs.

It then considers issues such as the technology’s efficiency and limitations, scale of operation, the main outputs and any ancillary plant required.

The choice of technology in any situation will depend on the specific nature of the streams involved. However, this gauide offers guidelines as to the likely suitability of each technology for certain tasks, basing its conclusions on that technology’s general characteristics.

In some cases, a technology is applicable to the removal of a whole range of substances. Reverse osmosis and nanofiltration, two membrane separation technologies, can, for instance, be used to remove dissolved heavy metals, anions, organics and water in organics. The same is true for evaporation.

In other instances, a technology has a much narrower application. Adsorption and air stripping are only used in the separation of dissolved organics, for example. Some technologies fall between these two extremes.

The main application of the various electrical technologies, for instance, is in the removal of dissolved heavy metals and anions, and the same is true for ion exchange and precipitation techniques.

In the separation of gases from liquids, demisters and electrostatic precipitation techniques are used to remove mists in gas streams, while defoaming technologies and separation vessels are used where bubbles of gas occur in a liquid and also for treating two-phase mixtures.

Guide contents

Contents of the guide include:

  • Selecting the appropriate technology
  • Separation of dissolved substances from liquids using:
  • Adsorption
  • Ion exchange
  • Precipitation
  • Membrane technologies
  • Electrical technologies
  • Evaporation
  • Distillation
  • Dissolved air flotation
  • Air/steam stripping

Separation of gases

Separation of gases from liquids using:

  • Separation vessels
  • Defoaming technologies
  • Demisting technologies
  • Electrostatic precipitation... request a copy of the full document >>
Extracted from a guide originally published by the Environmental Technology Best Practice Programme - © Crown copyright

Separation Technologies Guide Request

To receive a full copy of this guide please complete and submit this form:

Please let us know your name.

Please let us know your email address.

Please write a subject for your message.

Invalid Input

Please let us know your message.

Invalid Input
Invalid Input

World Class Expertise

Accepta work with industry worldwide delivering practical, cost effective solutions to resolve complex problems. If you require technical assistance, or information about our water treatment chemicals and other speciality products, please contact our dedicated technical support team on:

+44 (0) 845 519 89 90 or complete our Technical Support form.

Expert Training

Develop your skills with our internationally recognised water and wastewater treatment training courses. Delivered by world leading industry experts and designed for engineers, facilities managers and environmental professionals... water treatment training.

Keep upto date with our extensive library of good practice guides, latest research, regulatory updates, news and more... knowledge base.

Custom Chemical Manufacturing

Accepta offer custom chemical manufacturing, specialist toll blending and white label production services for our own water treatment chemicals and client specific formulations to UK and international customers.

To discover how you could benefit from our environmentally sensitive, quality driven chemical manufacturing capabilities please call us on +44 (0) 161 877 2334 or contact us.

International Distributor Opportunities

Accepta's innovative, quality driven customer focused business model creates exciting global supply chain and distributor opportunities for established and ambitious businesses currently active within the water treatment, wastewater treatment and environmental services sectors around the world.

If you are interested in becoming an exclusive international distributor of Accepta water treatment technologies please click here to learn more.

bsi-ukas-14001-2004bsi-ukas-9001-2008british-association-for-chemical-specialitiesinvestors-in-people-iip  greater-manchester-chamber-of-commerce-member