Covering sewage treatment tanks: effective protection against evaporation and birds

Settling tank covers play a crucial role in water treatment. One of the challenges faced by septic tank operators is minimizing water evaporation and protecting against birds that may enter and contaminate the water. An efficient solution is to cover the septic tank to prevent these problems. In this article, we will explain how to effectively cover your septic tank and why Euro-Matic balls are a great option.

Why one cover for clarification tanks is important

Sewage treatment tanks are usually open, which can lead to several problems:

  1. water evaporation: Without a cover, a significant amount of water is lost through evaporation, resulting in additional costs for refilling.
  2. birds: Birds can not only pollute the water, but can also harm themselves if they get into the pool.
  3. Algae growth: Open water surfaces promote algae growth, which can impair the efficiency of the treatment plant.

These problems can be effectively reduced by using suitable coverage.

Options for covering sewage treatment tanks

There are several methods to cover a septic tank. Here are the most common options:

  1. Network coverage: A net over the treatment tank protects birds from entering the water. However, it does not protect against evaporation.
  2. Solid covers (such as tarpaulins or cover plates): These provide good protection against evaporation, but can be expensive to install and maintain. They do not necessarily prevent birds from landing on the cover.
  3. Euro-Matic balls: These special floating balls offer protection against evaporation as well as against birds and are also easy to use.

Advantages of Euro-Matic balls

Euro-Matic balls are small, hollow plastic balls that simply float on the surface of the settling tank. They cover almost the entire water surface and offer several advantages over other covering methods. Learn more about EURO-MATIC Shade Balls.

feature Network coverage Fixed cover Euro-Matic balls
reduction of evaporation Low High High
protection from birds High Medium High
Ease of installation Medium Elaborate Very easy
maintenance medium to high High Low
Costs Medium to low High Medium to low
Flexibility Low Low High
promoting water quality Medium Medium High

Why Euro-Matic Balls Are the Best Choice

1. Easy installation and adjustment: Euro-Matic balls are simply poured onto the water's surface and automatically adapt to the shape and size of the pool. No special installation is required, and they can be easily removed if needed.

2. High efficiency in evaporation reduction: The balls float close together and cover almost the entire water surface, drastically reducing evaporation. You can calculate the evaporation here.

3. Effective bird protection: The balls effectively prevent birds from landing on the water or entering the pool. This helps reduce pollution and protects the animals.

4. Low maintenance costs: Compared to fixed covers or nets, Euro-Matic balls require minimal maintenance. They do not need to be regularly inspected or serviced.

5. Cost efficiency: Although they represent an investment, Euro-Matic balls are often more cost-effective compared to other solutions, especially when considering the long-term savings in water evaporation.

For operators of clarifiers, choosing the right cover is crucial to minimise both water loss and bird contamination. Euro-Matic balls offer a highly effective, flexible and cost-efficient solution that is easy to install and requires little maintenance. They are an investment that will pay off in the long term, making your clarifier operation more efficient and environmentally friendly.

algae reduction treatment tank

Euro-Matic balls not only offer significant benefits in terms of evaporation reduction and bird protection, but also play a key role in reducing algae growth in cooling water and sewage treatment tanks. Algae growth in such tanks is a well-known problem that can significantly reduce the efficiency of water treatment by clogging filters. Scientific studies have shown that the growth of algae is highly dependent on the incidence of light, as photosynthesis processes are light-dependent (Reynolds, 2006).

By using Euro-Matic balls, the amount of light reaching the water surface is drastically reduced, which significantly prevents algae growth. A study by Gao et al. (2019) showed that covering water surfaces with floating objects such as Euro-Matic balls reduces the amount of light reaching the water surface by up to 90%, which leads to a significant reduction in algae density. This reduction in algae growth helps to minimize the risk of filter blockages and sustainably improves water quality.

The use of Euro-Matic balls as covers for settling and cooling water basins is therefore not only an effective method for reducing evaporation and protecting against bird intrusion, but also a measure for reducing algae growth. The combination of these effects makes the balls a cost-effective solution for the operation of water treatment plants, as they can increase process efficiency and reduce operating costs in the long term.

Read more about our case study of RWE POWER AG here.

Calculate evaporation

Here you can calculate the annual water loss and the potential savings. Enter the total surface area in m² . Also enter the evapotranspiration in mm. You can find this value on the map below.

Calculate water evaporation

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