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INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR.

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Presentation on theme: "INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR."— Presentation transcript:

1 INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR INVESTIGATION OF BIOLOGICAL PHOSPHORUS REMOVAL IN A SEQUENCING BATCH REACTOR By Brett Bovee, Peter Burns, Alex Mikszewski

2 PHOSPHORUS (PO 4 3- ) Often is the limiting nutrient for algal growth in freshwater bodies – causes eutrophication “Anoxic Zones” caused by algal blooms – fish kills Typically abundant in 2° municipal wastewater effluent ( mg/L)

3 ENVIRONMENTAL DEGRADATION

4 PHOSPHORUS REMOVAL EPA Water Quality Criteria: Effluent concentration  10 μg/L Achieved by Chemical or Biological Removal

5 CHEMICAL REMOVAL High efficiency and Easy to Implement But…… Expensive Contaminates Sewage Sludge

6 BIOLOGICAL REMOVAL Presently in its infancy Enhanced Biological Phosphorus Removal (EBPR) Selects for Phosphate Accumulating Organisms (PAOs) Removes problem of sewage sludge contamination

7 EBPR Initial Anaerobic Stage PAOs grab organics / Release cellular PO 4 Aeration Uptake PO 4 for Energy Production & Storage

8 THE EXPERIMENT Objective: Create a Functional EBPR Batch Sequencing Reactor Two-Phase Experiment: Non-Treatment Operation  Phosphorus Treatment 15% Removal <70% Removal

9 PLANT SET-UP Cycling DO Control  BOD Removal High Aeration Rate  Plastic Covering Phosphorus Selection Stage  Select for PAOs (One Hour, Anaerobic)

10 EBPR RESULTS Achieved higher than expected removal  70%

11 EBPR RESULTS Greater Removal than Initial Non-Treatment Phase Avg. EBPR = mg/LAvg. Standard = mg/L

12 DISCUSSION & THOUGHTS Results show EBPR treatment works Maximum EBPR Efficiency  95% Encouraging results after 1 week of operation (HRT = 10 days)

13 EBPR IMPROVEMENTS Remove competition with G bacteria SRT  3 to 5 days Feed Temp < 10°C pH > 7.2 Influent  High COD : PO 4

14 FUTURE OF EBPR Establishing ID of PAO bacteria Influent and Ambient Conditions Favorable to PAO Must increase removal efficiency to avoid post-EBPR chemical treatment

15 THANK YOU QUESTIONSCOMMENTS


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