Wastewater treatment plant is where the wastewater is treated before being discharged into the nature (the recipient). The wastewater is distributed using sewage pipes and sewers to the sewage treatment plant. In a traditional sewage treatment plant, the purification takes place in three steps: mechanical, biological and chemical purification. A treatment plant can therefore consist of a number of different types of premises and spaces with different dimensions and humidity levels.
The challenge with sewage treatment plants is that a relatively high ventilation is required to create a good working environment in the premises. This in turn means that a high moisture load can occur during parts of the year, which in turn attracts insects.
The moisture load from open water surfaces poses a special challenge. It is important to maintain a temperature difference between the air at the open water surfaces relative to the temperature of the water, in this way making the water constitute a cold surface relative to the air. Then the moisture load in the room is limited by condensation on the cold water surface. One challenge is that the temperature of the fluids usually varies over the year. The humidity level must therefore be regulated with a combination of temperature regulation of the air in the premises, which have open water surfaces, and dehumidifiers in order to establish an appropriate level.
The right moisture level
A controlled humidity level below 60% relative humidity (RH) is needed to avoid corrosion and mould, but also to reduce bacterial growth. This requires a controlled relative humidity at the temperatures that can cause condensation on the cold surfaces - not in the air otherwise. See the Mollier chart where the curve for condensation (saturation) is indicated as 100% RH at different temperatures. At that level of moisture, the amount of insects also decreases.
Our technology does not require any unnecessary ventilation pipes to be installed. Our dehumidification technology is also as energy-efficient in cold as hot spaces, which makes it possible to save energy by lowering the temperature in spaces that are rarely used. The dehumidifier can be freely set in the room or mounted (FLEX) on a wall bracket on the wall so that the floor is kept free. The condensed water is typically led away with a hose or other drain.
An Airwatergreen FLEX dehumidifier consumes in average less than 400W and a REX consumes in average less than 2250W. All the energy used is maintained in the building. They provide with a cost-effective solution to avoid damage that may occur due to corrosion and bacterial growth.
For installations in the treatment plant, both our dehumidifier models are relevant. REX in larger spaces and FLEX in smaller ones. We can assist with measurements and calculations and give suggestions on how a suitable installation can be designed. Our FLEX dehumidifier has a capacity of 5 liters of water / day, which is more than sufficient in a smaller to medium-sized space.
REX has a capacity of 30 liters of water / day, which may be needed in larger halls with open water beds and in larger pipe galleries.
Every installation in the treatment plant is unique and should be adapted to the humidity load that applies there!
Airwatergreen currently has a number of installations in sewage treatment plants. In some cases, the dehumidifier works independently against the set desired moisture level (% RH) and in other cases it is connected to an existing monitoring system. The products are built to withstand the tough environment that applies with few moving parts and well thought out material choices and an IP63 classification. The air passing through the dehumidifiers not only dehumidified but also filtered so that dust and insects are caught. It creates the conditions for a good work environment!
Do not hesitate to contact us for a climate investigation to define the moisture levels and to design a suitable solution for your business!