Effluent Treatment Plant

Industrial wastewater treatment covers the mechanisms and processes used to treat waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re-use. Most industries produce some wet waste although recent trends in the developed world have been to minimize such production or recycle such waste within the production process. However, many industries remain dependent on processes that produce wastewaters.

So, industries produce wastewater, otherwise known as effluent, as a bi-product of their production. The effluent contains several pollutants, which can be removed with the help of an effluent treatment plant (ETP). The “clean” water can then be safely discharged into the environment.

Advantages of waste water systems

Manufacturers face strict regulations on discharge and waste. Non-compliance can lead to expensive fees and operations interference. A wastewater treatment skid will help you:

  • Stay in compliance
  • Reduce hauling and off-site treatment costs
  • Eliminate municipal fees
  • Reduce supply costs by recovering production materials out of the waste-stream for re-use
  • Eliminate unnecessary water usage during processing

Planning an Effluent Treatment Plant: Factors to Consider
Certain factories are required by law to install an ETP but deciding what type of ETP to install, what components it should contain and how it is best managed can be quite complicated. This chapter aims to present some simple ideas about treatment plants and offers practical advice on how to choose the most suitable one for a particular factory.
Any factory needing to install an ETP has to consider several factors. For example, information about the wastewater from the factory is required, including quantity and quality. To get this information the factory will have to take samples and have them analysed at a reputable laboratory.

Types of Sewage Treatment Plants

There are many different kinds of sewage treatment plants which vary in the process by which they treat wastewater.  Generally, they can be classified into the following types of system:

  • Activated sludge process (ASP)
  • Trickling filter process
  • Treatment of acids and alkalis
  • Treatment of toxic materials

    Treatment Level         Description   Process
Preliminary Removal of large solids such as rags,
sticks, grit and grease that may
damage equipment or result in
operational problems
Primary Removal of floating and settleable
materials such as suspended solids
and organic matter
Physical and  chemical
Secondary Removal of biodegradable organic
matter and suspended solids
Biological and chemical
Tertiary/advanced Removal of residual suspended
solids / dissolved solids
Physical, chemical and biological