Recovering nutrients with biological and membrane treatment – the process

The integrated system includes:

• Anaerobic digestion (AD) of livestock manure, animal-by-products such as slaughter house waste, food waste and cheese whey
• Solid–liquid separation of the digestate
• Biological treatment (MBBR) of the liquid digestate fraction to reduce organic load and nitrogen
• Ultrafiltration membrane reactor (UF-MBR) to remove solids and microorganisms
• Concentration of nutrients for product formation
• Pasteurization and stabilization of the solid organic fraction

The final product

• Biostimulant

A nutrient-rich organic amendment (solid): These products are reported to be suitable for agriculture, including greenhouse and open-field applications.