Overcoming Challenges to Achieve Optimization at the Crown Water Treatment Plant. Barbara Martin AWWA Mark Petrie Cleveland Water

Size: px
Start display at page:

Download "Overcoming Challenges to Achieve Optimization at the Crown Water Treatment Plant. Barbara Martin AWWA Mark Petrie Cleveland Water"

Transcription

1 Overcoming Challenges to Achieve Optimization at the Crown Water Treatment Plant Barbara Martin AWWA Mark Petrie Cleveland Water

2 Outline Partnership for Safe Water Background Program Phases Crown Water Treatment Plant: Achieving Partnership Phase IV

3 Partnership for Safe Water Drinking water optimization and recognition program established in 1995 to address Cryptosporidium concerns Partner organizations:

4 Partnership for Safe Water Partnership for Safe Water mission: To improve the quality of drinking water delivered to customers by optimizing water system operations. Two programs Treatment plant optimization Distribution system optimization

5 Treatment Program Open to surface water filtration plants of all sizes and configurations Multiple barrier approach for turbidity reduction <0.10 NTU Optimize all unit processes for particulate removal Conventional, direct filtration, membrane, DAF, softening

6 Distribution System Program Disinfectant residual Water quality integrity Main break frequency Physical integrity Pressure management Hydraulic integrity Identified in WRF 4109 Criteria for Optimized Distribution Systems

7 Distribution System Performance Improvement Variables Disinfectant Residual Cross-Connection Control Customer Complaints DBP Control Energy Management External Corrosion Control Flushing Hydrant and Valve Maintenance Internal Corrosion Control Main Breaks Nitrification Pipe Rehabilitation and Replacement Inorganic Accumulation Control Pressure Management Security and Online Monitoring Storage Tank O&M Water Age Management Water Loss Control Water Sampling and Response

8 Partnership Principles Beyond regulations Goals set beyond regulations to provide an additional measure of public health protection Avoiding Complacency Proactive measures to remain prepared and resilient Data-driven Actions and decisions based on data and information

9 Program Phases Phase I Commitment Phase II Baseline data reporting Phase III Self-Assessment completion Phase IV Demonstrated optimization Subscribers are required to comply with all applicable regulations, regardless of program Phase.

10 Phase II Baseline Data Raw Water Settled or Clarified Water Filter Effluent Turbidity (CFE & IFE) Finished Water (optional) Daily maximum reported. Daily maximum OR 4 hour data reported from individual or combined basins. 95 th percentile goal of 1.0/2.0 NTU depending on raw water turbidity. 4 hour CFE data, 15-minute IFE data (Phase IV), filter profiles. 95 th percentile goal of <0.10 NTU.

11 Phase III Self-Assessment Team activity, with objectives to: Identify and prioritize performance limiting factors Develop feasible action plans for improvement Implement plans to realize improvement Western Berks Water Authority (PA) Partnership Team Meeting

12 Phase III - Directors Award Annual Data Submission: Maintain Directors Award status, receive date tags, and become eligible for 5-, 10-, and 15- Year longevity awards Lake County (OH) representatives accept the Directors Award At ACE16

13 Phase IV - Optimization Phase IV awards recognize utilities for demonstrated optimization for water quality performance and operations 16 recipients to date Cleveland Water staff accepting the Phase IV Excellence in Water Treatment Award

14 Phase IV Optimization Goals Parameter IFE Turbidity CFE Turbidity Backwash Goal Settled Water Assessment Areas Goal 95 th percentile of <0.10 NTU, based on 15-minute interval data, maximum 0.30 NTU, consistent and stable filter performance 95 th percentile of <0.10 NTU, based on 4-hour interval data No more than 15 minutes of water production at a turbidity 0.10 NTU (for filters without FTW) 95 th percentile of <1.0 NTU for raw waters averaging 10 NTU or <2.0 NTU for raw waters averaging >10 NTU, based on 4-hour interval data All self-assessment areas considered area of strength based on peer-review process

15 Cleveland Water Serves 1.5 million in Northeast Ohio Four surface water treatment plants Baldwin Water Works Crown Water Treatment Plant Garrett A. Morgan Water Treatment Plant Nottingham Water Treatment Plant Joined Partnership for Safe Water in 1995 All plants have achieved the Directors Award

16 Crown Water Treatment Plant Commissioned in 1958 Conventional plant treating water from Lake Erie Serves western Cleveland suburbs 130 MGD capacity

17 Crown Water Treatment Plant 2004 Directors Award Phase IV Excellence in Water Treatment Award

18 Achieving Optimization Multi-year, systematic process, including projects to: Upgrade control systems Improve filtration Modify chemical feeds Sedimentation basin improvements Maintain staff training and engagement

19 Control System Upgraded plant control system Large monitors added to increase visibility

20 Filtration Improvements Rehabilitation and Expansion Project Filter to waste capability installed on all 12 filters Replaced existing dual media with 72 deep-bed mono-media anthracite Air scour and valve replacement

21 Filtration Improvements Projects Replaced underdrains on all 12 filters Filter media testing (sieve study and uniformity coefficient) prior to media replacement

22 Chemical Feed Modifications Improvements Added sodium hydroxide, cat poly Replaced chlorine gas with sodium hypochlorite Added redundancy to chemical feed skid

23 Sedimentation Basin Improvements Cationic polymer chemical feed system Used for high turbidities Individual basin turbidity monitors Tube settlers Chain and flight solids collection

24 Residuals Handling Crown is the only Cleveland Water plant to handle residuals onsite with two plate presses.

25 Operations and Staff Most important aspect! Safety improvements Operator training Operators key to success Engagement of all levels of organization Committed to optimization

26 Staying Optimized Additional planned optimization activities: SOPs for handling HABs in Lake Erie Increase PAC storage capacity Upgrade filter control valves Continued chemical feed improvements Operator training

27 Thank You!

28 Questions? Barbara Martin PSW Manager Mark Petrie Manager Crown WTP