sewage treatment plants


Find out what you should do and what you should avoid doing as an owner of a Tricel Novo sewage treatment plant.

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sewage treatment plants

Sewage treatment guidelines for homeowners


To begin with the sewage treatment guidelines for homeowners, we have gathered some information about Tricel sewage treatment plant. The Tricel Novo is a submerged aeration plant. This type of plant uses a simple proven technology which treats the wastewater with natural micro-organisms that are sustained in the plant with air given superior treatment results. The micro-organisms remove the pollutants from wastewater.

Micro-organisms need favorable conditions to grow and breed so that work to their optimum. Therefore, it’s important that end user uses caution on the substances entering the plant.

If the micro-organisms are accidentally destroyed due to lack of food or oxygen, they will repopulate in 3-6 weeks. During this time, there may be a slight odor from the plant as it cannot work to its full potential until the micro-organism repopulate. To help ensure the micro-organisms are not destroyed, the following recommendations should be avoided.

Sewage Treatment Guidelines for Homeowners


  • Locate the treatment plant in a pedestrian area away from any superimposed loads.
  • Ensure the finished ground level is lower than the “max ground level” indicated on the plant.
  • Ensure that vents are clear as the plant requires a fresh supply of oxygen. Inspect regularly especially in the autumn to ensure vents are free of leaves.
  • Carry out regular inspections and yearly maintenance to ensure the plant is operating at the optimum. Check regularly that the air blower is working by listening for the gentle hum from the plant. A yearly maintenance contract is available from your supplier.
  • Inspect the plant regularly and de-sludge using a licensed contractor to ensure it operates to its optimum.
  • Maintain a log of inspections, de-sludging and maintenance contracts to record the full-service history of the plant.

Do Not

  • Allow rainwater, groundwater or large volumes of water such as those from swimming pools, Jacuzzi’s into the wastewater treatment plant. Excessive water will increase the flow rate through the plant not allowing sufficient treatment time and may also flush the micro-organisms out.
  • Dispose of nappies, sanitary towels, baby wipes, cosmetic and cleaning wipes or similar, rags or non-bio-degradable material down the toilet as they block the drains and also cause a malfunction in the plant.
  • Overuse bleach and disinfectants. These are safe to use in accordance with the manufacturers’ guidelines and in the minimum necessary concentration.
  • Switch off the plant while going on holidays. The plant should operate 24 hours per day, seven days a week. The air blower and the sludge return system maintain the bacteria during a period of low occupancy.


If the micro-organisms are destroyed due to ingress of chemicals (or any of the products listed below) into the plant, the plant will have to be de-sludged and cleaned to restart the population of micro-organisms. The following substances will kill the working micro-organisms in the plant and should not be discharged of into the sinks or drains.


  • Pour neat bleach or disinfectants down the sink or outside drains. Often these are inappropriately used to treat foul odours from sinks and drains. However, these foul smells are caused by a build-up of decaying material or a plumbing problem which should be dealt with using an appropriate method.
  • Allow pesticides, paints, thinners, solvents, gardening chemicals or hazardous substances into the plant.
  • Fats, grease or any oil down the sink or outside drains as these clog the plant
  • Dispose of medicines down the sink. Dispose of as per the manufacturer’s instructions.
  • Use sink macerators unless the plant is specifically designed to accept this increased organic load. Sink macerators result in additional maintenance.
  • Some everyday products, such as milk, wine, beer can increase the organic load on the plant and cannot be disposed of down the sink or outside drains.


Properly installed, operated and maintained sewage treatment plants will give many years of trouble-free service. All plants are fitted with an alarm, and a buzzer will sound to alert of a fault in the air blower and discharge pump. The buzzer can be muted until the problem is fixed. Once fixed, the alarm will reset automatically and the mute switch must be turned on. All electrical work shall be carried out by a qualified person.


Please note:
Before taking any corrective action, always positively identify the real source of the odour. Check if the odour is coming from another outside source such as a storm drain. All wastewater disposal plants vent gases back through soil pipe and out roof vents. Improperly installed roof vents can cause odour problems. Traps/U-bends in drains prevent odours from entering the home. To function they must contain water and be sealed correctly.

View Tricel Novo manual

Get in touch if you have questions or need further information

Key Features



Strong, lighweight and easy to install SMC tank

Fast delivery

Fast delivery

UK manufactured ensuring short lead time



Tricel Novo is certified to EN12566-3

Get in touch

    Tricel Environment UK

    A trading brand of Dewey Waters Ltd.,
    Tricel Weston, Winterstoke Road, Weston-super-Mare, BS24 9AN, United Kingdom.
    Tel: +44 (0)1934 422 311