Perfectly clean water without the use of chemicals - Waste Water - Case Study

0

Courtesy of Danish Clean Water A/S - Danfoss A/S

Wastewater treatment plant successfully cut down costs and environmental impact
Thanks to the disinfectant system from Danish Clean Water, the Danish wastewater treatment plant Fredericia Spildevand is now saving yearly 75.000 € and reusing 70,000 m3 wastewater for cleaning – saving both money and drinking water.

The employees at Fredericia Spildevand were quite sceptical, when they first heard about the disinfectant generator from Danish Clean Water. But 3 years later, the generator is still running perfectly, effectively killing bacteria and preventing bio-film with a minimum of maintenance – and saving around € 75,000 each year.

”We meet a lot of sales people all claiming that their system is the perfect match for us, but we often tend to be disappointed. Therefore, we were also sceptical when we were introduced to the quite simple solution from Danish Clean Water. But it proved to be the perfect solution, and today I have no doubt, that we would go for the same system, if we were to expand,” says Annemarie Gotfredsen, operational manager at Fredericia Spildevand.

The generator from DCW saves time and money
Fredericia Spildevand is a Danish municipal wastewater plant. Each year, the plant uses 70,000 m2 water for internal cleaning. Like many other industries, Fredericia Spildevand constantly thinks of ways of minimizing the negative impact on environment. Instead of using drinking water for cleaning, they therefore reuse the wastewater. However this can only be done, if the waste water is cleaned and free of bacteria – so-called technical water.

Before 2009, Fredericia Spildevand used a UV system to disinfect the water. This solution didn’t always work properly. If the wastewater was too turbid, they had to run an extra cleaning process for the UV light being able to get through the water, to make the disinfection.

“It meant that the system wasn’t in continuous operation - wasting both time and money,“ Annemarie Gotfredsen says.

Minimum maintenance


After having used the system from Danish Clean Water for just a couple of months, the employees at Fredericia Spildevand noticed another benefit with the new system. The disinfectant fluid Neuthox had eliminated all the bio-film in the existing piping system.

One could think that using a generator to produce technical water is complicated compared to just opening for the tap to get the water. Annemarie Gotfredsen refuses that this is a valid argument not to choose the cheaper and more environmentally friendly solution:
“We haven’t hardly touched the generator since the installation 3 years ago. All we do is to add salt weekly. There’s no maintenance,” she says.

The Case – in Short
Instead of using tap water, the Danish municipal wastewater treatment plant Fredericia Spildevand reuses 70,000 m3 of their wastewater for internal cleaning. This can only be done, when the wastewater is free of bacteria.

Fredericia Spildevand has started in the process with use of reused water selected a UV system to disinfect the water. But if the wastewater was too turbid, they had to run an extra cleaning process for the UV light being able to get through the water, but don’t fulfil the disinfection requirements.

In 2009, they installed a disinfectant generator from Danish Clean Water resulting in a solution with the following benefits:

  • System in continuous operation
  • No extra cleaning processes
  • Minimum maintenance and use of manpower
  • Yearly savings of € 75,000
  • Elimination of bio-film in existing pipe system
  • Virtually zero bacterial count in treated wastewater

Customer comments

No comments were found for Perfectly clean water without the use of chemicals - Waste Water - Case Study. Be the first to comment!