Affordable and sustainable water recycling through optimal technology integration: a report of a study funded by the Australian Water Recycling Centre of Excellence

Energy neutrality and improved resource recovery in wastewater treatment are increasingly driving wastewater treatment processes to be operated under high-rate Air Discharge Effluent Return activated sludge Wastewater Wasting Sludge mixed liquor High-rate Bioreactor (30 min HRT, 0.5-3 days SRT) Clarifier SRT (day) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 C O D r e m o va l/o xi d a ti o n ( % ) 0 20 40 60 80 100 Total COD removal from the influent COD Total COD oxidation of the influent COD 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0 10 20 30 A n a e ro b ic d e g ra d a b il it y ( f d ) Activated Sludge Age (d) Gossett and Belser model Gossett and Belser data This study

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