providing infrastructure redundancy at the rocky ?· providing infrastructure redundancy at the...

Download Providing Infrastructure Redundancy at the Rocky ?· Providing Infrastructure Redundancy at the Rocky…

Post on 28-Aug-2018

212 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

  • Providing Infrastructure Redundancy at the Rocky River WWTP

    Timothy McCann AECOM

    Keith Bovard Rocky River WWTP

  • WWTP Infrastructure Redundancy

  • Redundancy

    As NASA Would Say:

    A Backup Plan for the

    Backup Plan

    Nuclear Power Plant

    Wastewater Treatment

    Plant

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 3

  • Infrastructure Redundancy

    Infrastructure Redundancy

    Neglected in Early WWTPs

    Incorporated in New

    Construction and

    Rehabilitation

    Redundancy May or May

    Not be Part of Normal

    Operations

    Includes Piping, Tanks,

    Channels, etc.

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 4

  • Driving Forces for Redundancy

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 5

    Maintenance and Operation

    Efficiency 38%

    Regulations 29%

    Emergency/ Disaster Planning

    12%

    Design Guidelines

    21%

    Efficient Redundancy

    Design Practices, 2003

    Survey of 46 Treatment

    Facilities

    Jank, Palmer, Ross 2003

  • Infrastructure Redundancy Benefits

    Reduced Downtime

    Meet Regulations

    Avoid Bypasses

    Provide Required Treatment

    Savings on O&M

    Avoid Maintenance Issues

    Increased Plant Operation

    Efficiency

    Overall Cost Effectiveness

    October 25, 2012

    Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 6

  • Additional Redundancy Measures

    Backup or Standby

    Equipment

    Pumps, Screening

    Spare Parts On-hand

    Instrumentation

    Redundancy or Backup

    Measures

    Sensors, Analyzers

    Emergency Contracts

    Sludge Disposal, Pumping

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 7

  • Redundancy 10 States Standards

    Sec. 53.6 Arrangement of

    Units

    Arrange units for O&M

    convenience

    Flexibility and ease of

    installation of future additions

    Continuous quality effluent

    Economical additions

    Sec. 54.2 Unit Bypasses

    Maintenance & emergencies

    Maintain effluent quality

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 8

  • Headworks and Preliminary Treatment

    Screening

    Grit Removal

    Equalization Tank

    Bypass Alternatives

    Redundancy or Backup

    Measures

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 9

  • Primary Treatment

    Primary Clarifiers

    Additional Tanks

    Replacement Equipment

    Influent & Effluent

    Channels and Pipes

    Chemical Feed

    Storage

    Pumping

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 10

  • Secondary Treatment

    Biological Treatment Tanks

    Additional Tanks

    Backup Equipment

    Bypass Channels and

    Pipes

    Sludge Lines

    Secondary Clarifiers

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 11

  • Advanced Treatment

    Bypass Channels and

    Pipes

    Nutrient Removal

    Nitrogen

    Phosphorus

    Filtration

    Process Tanks

    Equipment

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 12

  • Disinfection

    Bypass Channels and

    Pipes

    Process Tanks

    Chemical Feed

    UV

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 13

  • Solids Processing

    Digester Tanks

    Storage Tanks

    Bypass Piping

    Dewatering

    Gas Handling

    Disposal

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 14

  • WWTP Infrastructure Redundancy

    What Works Best for YOU?

    Rotate Equipment

    Use Tanks, Channels as Part

    of Normal Operations

    Emergency Use Only

    Tailor to Each Individual

    Plant

    Operator Experience

    What Will Work?

    What is Needed?

    Engineering Guidance

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 15

  • Rocky River WWTP Background and History

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 17

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 18

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 19

  • Rocky River WWTP Information

    Serves 4 Communities

    Bay Village

    Fairview Park

    Rocky River

    Westlake

    Design Flow: 22.5 MGD

    Average Flow: 12.5 MGD

    Peak Influent Flow: 170

    MGD

    February 2011

    All Flow Through Bar Screens

    Submerged Outfall

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 20

  • 1937 Plant

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 21

  • 1937 Plant Description

    Grit Chamber

    Settling Tank

    Anaerobic Digestion

    Sludge Drying Beds

    Discharge to Spencer Creek

    Provided Capacity & Function Until 1960s

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 22

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 23

  • 1961 Plant

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 24

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 25

  • 1961 Plant Modifications

    Additional Screening & Comminutor

    Aerated Grit Removal

    Chemical Coagulant Feed

    Primary Clarification

    Effluent Chlorination

    Submerged Outfall to Lake Erie

    Sludge Thickeners and Anaerobic Digesters

    Vacuum Filtration and Sludge Incinerator

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 26

  • 1961 Construction Photos

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 27

  • 1961 Construction Photos Cont.

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 28

  • 1975 Plant

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 29

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 30

  • 1975 Plant Modifications

    Ohio Water Pollution Control Board

    1965 Required Secondary Treatment

    Average Flow: 10 MGD

    Peak Flow:20 MGD

    Granular Activated Carbon Filtration & Adsorption

    Added Settled Sewage Pump Station to Carbon Facility

    Additional Minor Upgrades

    Carbon Treatment Operated Less than One Year

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 31

  • Current Plant

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 32

  • October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 33

  • Current Plant

    Added four Fixed Film

    Reactors & Final Clarifiers

    Chlorine Contact Tanks

    Modified Settled Sewage

    Pump Station

    45 MGD Capacity

    Four 15 MGD Pumps

    42-inch Force Main to Reactor

    Building

    Additional Clarifier Tanks

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 34

  • Settled Sewage Pump Station Backup Project and Alternatives

  • Settled Sewage Pump Station

    Pumps Primary Treated

    Wastewater to Secondary

    Treatment

    Wet Well - Converted

    Chlorine Contact Tank

    Rehabbed Carbon Column

    Treatment Pump Station

    Flow from Primary

    Clarifiers and Auxiliary

    Clarifiers

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 36

  • Plan View Before Project

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 37

  • Section View Before Project

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 38

  • SSPS Backup Project Purpose

    All Flow to Secondary

    Treatment is through

    Existing Force Main

    Potential Issues with Pump

    Station No Secondary

    Treatment

    Pump Failure

    Force Main Failure

    Wet Well Issues

    October 25, 2012 Providing Infrastructure Redundancy

    at the Rocky River WWTP Page 39

  • SSPS Potential Additional Issues

    Prevent Permit Violations

    Die-off of Microorganisms

    at Reactors

    Associated Odor Problems

    (Proximity to Houses)

    Start-up Timeframe for

    Reactor Activity

    Consequent Sludge

    Volume Wash-out

    October 25, 2012 Providing Infrastructure Re