jerry ussher of springfield bob o’bryan ...€¢ develop process design criteria and technical...

8/28/2014

JERRY USSHER CITY OF SPRINGFIELDBOB O’BRYAN BLACK & VEATCH

INNOVATIVE EHRT FACILITY TO HELP ELIMINATE BYPASSES AT SPRINGFIELD'S WWTP

AGENDA

• Project Background• Compressible Media Filtration (CMF) Technology• Design and Construction• What’s Ahead

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PROJECT BACKGROUND

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HRTtechnologyselectedbyevaluatedbidprocess

• LTCP submitted to Ohio EPA• Collection system conveyance improvements• 100‐mgd HRT facility at WWTP

• Compliance schedules in NPDES permit

• Advanced facility planning• Define wet‐weather event characteristics• Develop HRT alternatives• Develop process design criteria and technical selection criteria (economic and non‐economic factors)

• Select HRT technology prior to final design

PLANNING AND STUDIES8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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EVALUATED BID PROCESS

• Same life‐cycle costs (±7%)• Top 5 Differentiators

• No need to increase staffing• Simplicity of process and operations• No chemicals required• Turndown capability• Dual function potential during dry weatherCMFfitSpringfieldsituationbest

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Ohio WEA‐AWWA 2014 Technical Conference & Expo |

CMF TECHNOLOGY

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Compressible Media

EXAMPLE LAYOUT AND CROSS SECTION8/28/2014

Compressible Media Bed


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Filtrationprocesscontrolledbylevelandtimers

TREATMENT PROCESS8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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DESIGN AND CONSTRUCTION

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8‐MONTH PILOT STUDY CONFIRMED DESIGN CRITERIA

Multiplewet‐weatherevents.Freezingtemperatures.

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View Down Into Filter Vessel

A Soggy Day at the Pilot PlantTypical Wet‐Weather Samples

Influent Effluent

Pilotconfirmed10‐minutecontacttimewithlowhypodose

CMF EFFLUENT AMENABLE TO DISINFECTION8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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PROCESS FLOW DIAGRAM OF FULL‐SCALE FACILITIES

8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

Existing Primary Settling

Degritting

New InfluentScreening

Trickling Filters

Activated Sludge

Existing Dry and New Wet Weather

Disinfection

Existing and New Final Clarifiers

Backwash to Primary or Bio Treatment

10987654321 11

34 MGD PeakCapacity

Intercept Up to 100 MGD of CSO Flow for HRT

Future Tertiary Filtration of Dry Weather Flow

New WWETCO FlexFilters

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CONSTRUCTION OF NEW FACILITIES8/28/2014

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Compressible Media FilterChlorine Contact BasinEffluent Pump Station

Wet‐Weather Headworks

HeadworksPrimary Clarifiers

Trickling FilterActivated Sludge Process

Disinfection


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HeadworksPrimary Clarifiers

Trickling FilterActivated Sludge Process

Disinfection

Wet‐Weather Headworks

Compressible Media FilterChlorine Contact BasinEffluent Pump Station

WET‐WEATHER HEADWORKS8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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Screened overflow

WET‐WEATHER HEADWORKS (PLAN)

Horizontalrakedbarscreens,rockboxandcontrolgates


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WET‐WEATHER HEADWORKS (SECTION)8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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INSTALLATION OF FILTER INTERNALS ‐ BLADDER8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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INSTALLATION OF FILTER INTERNALS – TOP PLATES


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• Peak backwash return rate of 9 mgd

• 130,000 cf of backwash storage

• Backwash return to:• Primary effluent• CMAS basin influent

• Peak backwash return rate is solids based

BACKWASH DESIGN8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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20,000

40,000

60,000

80,000

100,000

120,000

1 2 3 4 5 6 7 8 9 10 11

Storage (cf)

Hours

Peak Storm Backwash Storage

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INTERMITTENT OPERATION• Freezing concerns

• Self draining

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• Accessible for cleaning

• Disinfection for filter layup

• Turndown only limited by minimum hypo feed rate, which can be compensated with bisulfite feed.

• Other HRT alternatives typically limited by coagulation chemical feed system turndown.

• Additional cells can be quickly brought on line.

TURNDOWN CAPABILITY8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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• Fully automated PLC based control system

• Integrated into existing plant SCADA system

• Limited amount of equipment• Blowers• Electrically operated gates and valves• Sodium hypochlorite and sodium bisulfite feed systems• Effluent pumps

• No coagulation and flocculation processes to optimize

REMOTE OPERATION8/28/2014Ohio WEA‐AWWA 2014 Technical Conference & Expo |

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WHAT’S AHEAD

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NEARING COMPLETION OF CONSTRUCTION AND STARTUP IN SPRINGFIELD

August 2012Began Construction

December 2014Complete Startup

June 2015Meet Final Effluent Limits


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RECENT DEVELOPMENTS OUTSIDE OF SPRINGFIELD• March 2013 ‐ Blending upheld by 8th Circuit

Court in Iowa League of Cities v. EPA

• August 2013 ‐ New WEF planning guidance

• June 2014 ‐ USEPA Experts Forum on Public Health Impacts of Wet Weather Blending favorable toward EHRT

• July 2014 ‐ NPDES permit with EHRT renewed for Lawrence, Kansas. Outside 8thCircuit.

• August 2014 ‐ New WEF design guidance

• August 2014 – Center for Regulatory Reasonableness v. USEPA filed in DC Court of Appeals

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THANK YOU!8/28/2014

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Bill Young

Tim Weaver

Doug BorkoskyBaker & Associates

Mark Boner

Name???

Bob O’BryanProject Manager(614)473‐[email protected]

Jerry UssherSuperintendent(937)324‐7624 [email protected]

Sid SenguptaClient Services Director(513)936‐5121 [email protected]

Dianne SumegoClient Services Director(913)458‐4799 [email protected]

Lee WeberEngineering Manager(614)473‐[email protected]

Jeff ChampionResident Engineer(616)430‐[email protected]

EXTRAS

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jerry ussher of springfield bob o’bryan ...€¢ develop process design criteria and technical...

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