freeze protection

Wastewater Treatment and Freeze Protection

Have you ever heard the phrase, “water is essential to life”? Nothing would survive without it, not even the advanced industrialization! Everything needs water and to ensure the guarantee of sustainable water supplies, water purity is a priority. As companies like Veolia Water Technologies know, wastewater treatment is very important and its an all year-around operation. In order to ensure that wastewater treatment can operate during the winter freeze protection needs to be applied.


Wastewater is water that was used from residential and industrial areas. Water from a shower or bath, from a flushed toilet, from wash machines, and even dishwasher is wastewater. Any water that travels through a sewer system is consider wastewater. It is composed of 99.94% water and the remaining is solid matter.

freeze protection

Potable Water

Potable water is water that can be consumed by humans and animals. Water is naturally potable, but needs to be treated in order to be sure that there are no harmful contaminants that could cause illnesses. 71 % of the earth’s surface is covered with water and only 3.5 % of that water is freshwater. Potable water is scarcer, with only 0.3 % of the world’s water resources are drinkable. Removing solid matter from water is a key step in purification for potable water. Separators will remove any sludge and solid particles. Carbon dioxide in water will cause corrosion and reduces quality. A physical separation, called stripping, will remove the CO2. In some homes, there may be an issue with the central plumbing, causing problems within the system affecting water treatment. If the homeowner has a home warranty for their system from websites such as, they hopefully will be able to get this sorted as soon as possible to make sure that their water is drinkable again.

freeze protection

Three Levels of Water treatment

Primary (mechanical) Treatment: the first stage to remove suspended and floating solids from raw sewage, which may be done with equipment like a decanter centrifuge. Screening to trap solid objects and sedimentation. Chemicals are used to accelerate the sedimentation process.

Secondary (biological) Treatment: this stage is to remove the dissolved organic matter that is still present after the primary treatment. Microbes will consume the organic matter and convert to CO2, water, and energy. Then settling tanks will remove more of the suspended solids.

Tertiary Treatment: this treatment will remove more than 99% of all the impurities from sewage by removing phosphorus and nitrogen. This stage also disinfects with chlorine.

heat exchangers

Freeze Protection in Wastewater Treatment

At a wastewater treatment plants, the tanks or reservoirs, valves, pipes, and equipment lines do not freeze! To keep all levels of wastewater treatment protected during the winter, there is a need to apply freeze protection. In an earlier post, we have already discussed freeze protection. However, it is making sure that any outside tanks or reservoirs temperatures do not reach below 32°F and the liquid freezes.

Speak with an AccuTherm rep to discuss about freeze protection for wastewater treatment at

If you enjoyed this post, please consider leaving a comment or subscribing to the RSS feed to have future articles delivered to your feed reader.