Biological Phosphorus Removal from Wastewater Effluents Erick Griffiths BIE 6870 2/28/08 9/12/2018 Erick Griffiths

Objective Use biological treatments for P removal down to regulatory levels. 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Outline Introduction Methods Results Conclusion Future Work 9/12/2018 Erick Griffiths Erick Griffiths

Introduction Aerated Lagoons Headworks Effluent 14 MGD A2 A1 B2 C B1 D 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Introduction 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Introduction Proposed limit: 0.09 mg/l 9/12/2018 Erick Griffiths

Introduction N limited during the summer. T limited during the winter. 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Introduction 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Introduction 9/12/2018 Erick Griffiths

Methods N Experiment Setup 3 Nitrogen Sources Urea Ammonium Chloride Sodium Nitrate Ammonium Nitrate 0.5 g/l Urea Control 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Refrigerated Incubator Methods T Experiment Setup Cold Room 4 C Refrigerated Incubator 10 C 4 Temperatures 4 C 10 C 20 C 30 C Constant Temp. Room 30 C Lab 20 C 9/12/2018 Erick Griffiths

Genesys 5 Spectrophotometer Methods Genesys 5 Spectrophotometer Samples Collection One month time period Filtered HACH Tests Orthophosphate (PO4) Nitrogen, Ammonia (NH3- N) http://www.fishersci.com 9/12/2018 Erick Griffiths

Results 0.09mg/l Below Detection Limit 9/12/2018 9/12/2018 Control Urea Ammonium Nitrate 0.09mg/l Below Detection Limit 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Results 0.098 mg/l 0.129 mg/l Below 0.009 mg/l 9/12/2018 Erick Griffiths

Conclusion Adding nitrate during the summer months will improve algal growth and P removal down to regulatory levels. P removal is possible at lower temperatures. 9/12/2018 Erick Griffiths

Future Work Dissolved Air Floatation (DAF) Solid Liquid Separation Flocculation Experiments http://www.ecengineering.net http://www.westech-inc.com/ 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Future Work Lipid extraction for the production of biodiesel Methane production 9/12/2018 Erick Griffiths

Reference “Sewage lagoons on way out?” The Herald Journal, Vol. 98, No.116, April 26, 2007. “Genesys 5 Spectrophotometer” http://www.fishersci.com Accessed Feb. 26, 2007. “DBT DAF Batch Tester” http://www.ecengineering.net Accessed Feb. 26, 2007. “DAF/ DNF Clarifiers and Thickeners” http://www.westech-inc.com/ Accessed Feb. 26, 2007. 9/12/2018 9/12/2018 Erick Griffiths Erick Griffiths

Questions ?