Side-Stream Fermentation to achieve low-P permits by EBPR, Viable?: PRESENTATION ONLY

Proceedings

Side-Stream Fermentation to achieve low-P permits by EBPR, Viable?: PRESENTATION ONLY

Mendizabal, J., Severn Trent, UK
(free)

Drivers:
• Low P permits (0.3-0.2 mg/L Total P)
• Reduced reliance on chemicals
• Carbon footprint reduction
Theory:
• Particulate COD (Activated sludge) will be converted to readily biodegradable COD (VFAs)
• VFAs will increase P release in the anaerobic tanks and increase overall P uptake in the aerobic tanks

Large ASP site treating 72,000 PE
• Upcoming 0.2 mg/L Total P permit
• Sidestream RAS fermenter effluent
• To the outlet of anoxic zone/ start of anaerobic zone in lanes 1-4
• Lane 5 kept as control

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Proceedings