DePrex® – Degassing Anaerobic Digested Sludge Streams

Digested sludge streams that exit an anaerobic digester still contain methane, together with other compounds such as hydrogen sulphide.

DePrex® is a process that removes dissolved methane from the digested sludge stream, resulting in recovery of the methane, which leads to a reduction in greenhouse gas emissions.

Between 85 – 90% of the dissolved methane is recovered – this gas would make its way to the atmosphere through the sludge plant, either via any sludge storage facilities and/or sludge dewatering.

Example Comparison

• Gas yield for a 100,000EP treatment plant increases by approximately 3.9%
• This results in approx. 63 kWh/d of energy if cogeneration is used
• Reduces GHG emissions by equivalent 393 kg CO₂/d

Other Benefits

• Improved sludge settleability and dewaterability
• Odour reduction within the sludge dewatering plant
• H2S removal – reduces hazardous atmosphere at the sludge dewatering plant
• Optional dosing for struvite removal

To learn more about DePrex® Degassing Technology please call us on 1300 417 697 or email [email protected] for an information pack.

About the Hydroflux Group

The Hydroflux Group aims to deliver the highest level of engineering and scientific know-how to the emerging issues of sustainability, climate adaptation and environmental protection with a specific focus on water and wastewater.

As part of its vision and mission, Hydroflux has always taken its climate responsibility seriously. In 2022, Hydroflux became Australia’s first water treatment and technology company to achieve Climate Active carbon neutral certification for its organisation and products. It knows that partnering with customers and clients is the most significant impact it can have in its journey. The Group employs over 100 staff and operates throughout Australia, New Zealand and the Pacific Islands, with office locations in Sydney, Melbourne, Brisbane, Perth, Auckland, Suva and Portsmouth.