Pretreatment of Municipal Wastewater Sludge

THE CHALLENGE

Reach best possible conditions for generation of biogas from secondary sludge before the digester and decrease dry sludge disposal in wastewater treatment plants.

THE TECHNOLOGY

PST – in-situ, partial chemical oxidation process for primary and secondary municipal sludge.
The municipal wastewater sludge unit (PST) is a fully automatic, in-situ, partial chemical oxidation process for primary and secondary municipal sludge. It is used to increase the levels of soluble COD before anaerobic digestion (AD).

• Alpha Cleantec has developed based on its proprietary technology a process allowing to pretreat sludge before the digester, thereby significantly increasing biogas generation (up to 50%) and decreasing dry sludge disposal at the end of the process (up to 20%).
• In certain territories, the dry sludge at the end of the process can be sold as fertilizer (sludge class A).
• Decreases carbon footprint of wastewater plants.

• Granted patents
• Rapid pretreatment
• Safe for users and environment
• Very low electricity requirement
• Negligible CO2 footprint
• Small footprint of equipment
• Cost-effective
• Increase of COD up to 100%
• Increase of Biogas generation up to 50%
• Decrease of dry sludge disposal up to 20%
• Sludge class A, fertilizer with KNP