ELOVAC®

Vacuum degassing can also improve the sludge digestion process of the entire wastewater treatment plant. We are currently investigating how vacuum degassing can improve digester performance – for example, sludge density, and thus increase digester capacity while avoiding foaming issues.

How can ELOVAC® improve digester capacity?

- Faster release of the gas from the sludge floccs
- Higher density of the sludge
- Higher amount of biomass in the digester
- Higher sludge age (HRT) in the digester
- Better mass transfer
- Avoid dosing high amounts of defoamer
- Better mixing of the digester

MORE INFORMATION AND CASE STUDIES COMING SOON !

Vacuum degassing on its own can have a significant impact on the carbon footprint of the treatment plant.

Only with the implementation of ELOVAC® the following results were achieved:

- 3 kg avoided CO₂-equivalent emissions per cubic metre of digested sludge. In absolute numbers, this means (for a 100.000 PE treatment plant) the  avoidance of 410 kg CO₂-equivalent emissions or approx. 3,200 CO₂-neutral car-kilometres per day (based on threshold fleet consumption car CO₂emission 130 g CO₂/km.

Additional 0.63 kWHₑₗ per cubic metre sludge from the withdrawn biogas make the operation of ELOVAC® energy positive