Blackburn Wastewater Treatment Plant Upgrade Study

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Section 4.0 - Blackbum Treatment Options 4.6 OPTION 6 - UPGRADE AND EXPAND BLACKBURN WWTP TO TREAT PROJECTED FLOWS AND LOADS 4.6.1 Outline In this option the existing sewage lagoons would be upgraded and expanded to handle projected flows and loads from the Blackburn sewage collection area, for an ultimate population of 5,000 persons, and to meet required effluent standards. The existing treatment system consists of two aerated lagoons, sized to accommodate a contributing population of 2,500. Expanding the lagoon system to handle the ultimate population of 5,000 would involve doubling its present size. The expanded lagoon system will address conventional treatment requirements for BODs and TSS removal. However, the lagoon system must also ahress removal of ammonia toxicity. Because of the winter and early spring weather conditions experienced in the Prince George area, it is practically impossible to achieve ammonia removal by nitrification in an aerated lagoon system. The issue of ammonia toxicity removal would have to be addressed by considering the addition of a tertiary rotating biological contactor (RBC) process to provide nitrification of the lagoon emuent. A schematic representation of this option is presented in Figure 4.6. An VI reduction program is to be implemented to reduce the volume of wastewater being treated in the lagoons during wet weather and snowmelt conditions. The existing Mackus Road pumpstation would be upgraded. Key activities or capital works associated with this option are as follows: Implement I/I reduction program. Rehabilitate existing lagoons. Double lagoon capacity. Upgrade Mackus Road pumpstation to handle projected increased flows. Address ammonia toxicity issue by considering the use of a tertiary nitrifying RBC. Key technical issues associated with this option are as follows: Extent to which the VI reduction program will reduce peak wet weather flows must be evaluated.
CITY OF PRINCE GEORGE Scale= $:I00 f Existing Chlorine Contact Tank Initiate Ill reduction program and complete over 5/10 year period; assess PWWF based on results. 0 Upgrade and expand Blackbum WWTP lagoon facility; provide treatment capability for ammonia reduction to address toxicity concerns. No routing of flow to Lansdowne Road WWT P. Assess conditionlcapacity of existing Mackus Road PS. Existing Operations Building lsM ENGINEERING LIMITED City of Prince George Blackburn Wastewater Treatment Planl Treatment Options Study OPTION 6 Figure 4. t
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BLACKBURN WASTEWATER TREATMENT PLAN
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Table of Contents SECTION TITLE PAG
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SECTION 1 STUDY BACKGROUND AND OBJE
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Section 1.0 -Project Background and
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Section 1.0 - Project Background an
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City of Prince George - Decision Wo
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City of Prince George - Decision Wo
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MINUTES OF MEETING PR~ECT NAME: Bla
Page 27 and 28: Blackburn WWTP Treatment Options Op
Page 29 and 30: Nores. Annual O&M cost for Blackbum
Page 31: Blackbum WWTP Treatment Options Opt
Page 35 and 36: APPENDIX A STANTEC CONSULTING LTD.
Page 37 and 38: 5.0 CONCLUSIONS I '\ -. 5.1 RESULTS
Page 39 and 40: CITY OF PRINCE GEORGE Forcemain fro
Page 41 and 42: Section 6.0 -Recommended Option Key
Page 43 and 44: Section 6.0 -Recommended Option Com
Page 45 and 46: SECTION 6.0 RECOMMENDED OPTION 6.1
Page 47 and 48: SECTION 5.0 EVALUATION OF OPTIONS 5
Page 49 and 50: Section 5.0 -Evaluation of Options
Page 55 and 56: Section 5.0 - Evahation of Options
Page 57 and 58: Section 3.0 - Evaluation of Options
Page 59 and 60: SECTION 4.0 BLACKBURN TREATMENT OPT
Page 61 and 62: Section 4.0 - Blackbum Treatment Op
Page 65 and 66: Section 4.0 - Blackburn Treatment O
Page 67 and 68: Initiate llt reduction program and
Page 71 and 72: Section 4.0 - Blackbm Treatment Opt
Page 75: Section 4.0 - Blackbum Treatment Op
Page 83 and 84: :ITY Of PRINCE GEORGE Existing Chlo
Page 93 and 94: SECTION 4.0 BLACKBURN TREATMENT OPT
Page 101 and 102: Initiate Ill reduction program and
Page 105 and 106: SECTION 3.0 AUDIT OF EXISTING FACIL
Page 107 and 108: Section 3.0 -Audit of exist in^ Fac
Page 109 and 110: Section 3.0 -Audit of Existing Faci
Page 111 and 112: SECTION 2.0 III MITIGATION MEASURES
Page 113 and 114: Section 2.0 - UI Mitigation Measure
Page 115 and 116: APPENDIX E FLOW CALCULATIONS FOR SE
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Blackburn Wastewater Treatment Plant Upgrade Study

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