inDENSE for biomass densification at Søholt WWTP

Silkeborg Spildevand A/S was facing significant challenges at the Søholt wastewater treatment plant, especially during cold and rainy winter months.

The plant is situated in the city of Silkeborg, known for its hilly landscape and delicate local water ecosystems, which add an extra layer of complexity to managing wastewater. Because of this unique terrain, the plant often gets hit with high hydraulic peak loads during heavy rainfall events.

It was crucial to ensure that the wastewater is thoroughly treated during these peak times to protect the Gudenå River, which receives the treated water and also preventing sludge blanket escapes. Without addressing these issues, the local environment could face significant environmental risks.

To tackle the challenge with wastewater overflows and to meet our client’s growing concerns, we retrofitted Søholt wastewater treatment plant with inDENSE solution. This technology significantly boosts the plant’s hydraulic capacity, allowing it to handle up to 30% more wastewater flow during heavy rain, without additional clarifier, therefore lowering the environmental impact and significantly reduces costs of implementation.

By implementing inDENSE, we’re directly addressing key environmental concerns: reducing wastewater overflows into local lakes and other protected natural environments and preventing sludge blanket escapes during the winter months, ensuring the preservation of the Gudenå river.

• Increased Hydraulic Capacity to handle a 30% higher wastewater flow during rain events, effectively expanding its capacity without costly physical expansion
• Environmental Protection by reducing wastewater overflows and preventing sludge blanket escapes
• Cost Savings minimizes the need for expensive and space-consuming extensions related to future requirements
• Reduced use of chemicals for phosphorus removal as inDENSE also strengthens biological phosphorus removal