Do's and Don'ts - Sewage Treatment Plant Recommendations

You may not realise this, but a sewage treatment plant needs to be taken care of!

All manufacturers recommend having your sewage treatment plant serviced on a regular basis to ensure it is running at optimum performance.

Manufacturers also make certain recommendations about how you can look after your sewage treatment system to prolong the lifespan. Below is our take on these guidelines:


  • The water type in your area determines the level of household cleaning products you use. Soft water requires a lower concentration of detergents than hard water.
  • Where possible, try and use cleaning products little and often, rather than overloading your sewage treatment plant all at one time. For example, use a little bleach in your toilet every other day instead of half a bottle at one time!
  • Powders used in washing machines and dishwasher can re-coagulate and cause blockages, so using liquids is much better for your sewage treatment plant.
  • Instead of doing all your washing on a particular day, try to do a load every day so as not to overload your sewage treatment plant with wash detergent.
  • The bacteria inside the sewage treatment plant gets used to treating your cleaning products, so try and stick with the same kind or the bacteria will forget its job!!
  • Think before you put anything down the sink, toilet, or drains.
  • All sewage treatment plants require an empty on a regular basis (otherwise know as a desludge). The manufacturer will give you recommendations on how often depending on the size of the unit and the number of people using it. It is important to use a professional company as an empty must be carried out correctly. If you have your unit serviced regularly by professionals, they can also advise if the unit needs to be emptied.
  • Ensure only toilet paper is flushed down the toilet and used in normal quantities.
  • Your sewage treatment plant needs to be always switched on, even when you are on holiday. If you leave the sewage treatment plant switched off it can cause damage to the internals and kill the bacteria inside which is a necessity to treat the sewage!


  • Don’t put sanitary towels, tampons, cotton wool or cotton wool buds, incontinence pads or any wipes down the toilet.
  • When cooking with oil, it is important not to dispose of it down the drains. The fats will suffocate the bacteria – and we all now know that the bacteria will not like this!
  • Don’t use neat disinfectant or bleach, always dilute these products, and use little and often.
  • Medicines and any other chemicals should not be disposed of down the drains either.
  • Large volumes of water, such as rainwater and ground water need to be diverted away from the inlet of the sewage treatment plant as an overload of water will increase the flow rate and won’t allow for the correct treatment time.
  • Water from swimming pools or Jacuzzi’s should not be put into the sewage treatment plant as the chlorine will kill the bacteria.

Don’t forget – if you have any questions give MRS Wastewater a call on 0333 335 5137!

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