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Bridging the Gap from Water Plant Data Collection and Data Analytics to Operational Decision Support for Harmful Algal Blooms
Christopher M. Miller, Ph.D., P.E.Department of Civil Engineering
One Water ConferenceColumbus, OH
August 28, 2014
Project Team and Resources
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PAC Suppliers
2013 – Heightened HAB Awareness
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2014 Headlines
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Scope and Perspective
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Our efforts are driven by expressed concerns at water treatment plants regarding:
1. Evaluating and Implementing New Technology and Options (i.e. new coagulants, new PAC materials)
2. Data-Driven Management (a.k.a. Decision Support)3. Taste-Odor Issues and Algal Toxins4. Intermittent elevated THM and HAA levels and
more stringent compliance requirements5. Emerging Contaminants and Unregulated DBPs
Systems Approach• Samples from
multiple water treatment plants (WTPs) source water and in the water plant
• Samples from distribution system
1. One of the largest fluorescence database in engineered system (multiple cities, multiple coagulants) for surface water sources
2. Large database of DBP measurements
AWS-HAB Project Tasks (March 2014)
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1. Enhanced water quality monitoring of AWS reservoirs (e.g. Lake Rockwell and Ladue) and watershed.
2. Data mining and knowledge extraction regarding HABs from watershed data.
3. Evaluate options for managing HABs in the watershed and the plant.
4. Develop HAB module for decision support.5. “Real-time” implementation and operation of
dashboard modules for coagulation, chlorine demand, and DBP formation.
Akron Water Supply Background
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1. Multiple Reservoirs
2. Agricultural Watershed
3. ~36 MGD
What is “The Gap” ?
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Water Plant Data Collection
and Data Analytics
Operational Decision Support“The Gap”
Plenty of data and good science, but how do we convert it to operational improvements, particularly to respond to a Harmful Algal Bloom (HAB) ?
Bridging the Gap – UA Approach
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Water Plant Data Collection
and Data Analytics
Operational Decision Support
1. Monitoring Program(s) – always evolving
2. Model Development –based on latest science and inputs
“The Gap”
1. Watershed2. Water Plant3. Distribution System
1. Require Monitoring Data Linked to Operations2. Test New Water Plant Response Alternatives3. Validated Models and Optimum Operational Response
Monitoring Data Linked to Operations
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1. Enhanced water quality monitoring of AWS reservoirs (e.g. Lake Rockwell and Ladue) and watershed. Watershed Monitoring and Data Platform Fluorescence Monitoring (Watershed and Plant)
650 700 750 800600700
8000
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Emission (nm)
WS02 May 2014
Excitation (nm)
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Reservoir Profiling - Chlorophyll
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Highest values of summer on 6/26/14
Can have range in Lake Rockwell of 10 ug/L or more (depth and distance to intake with ~ 2-4 week residence time)
Watershed Monitoring Platform
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Built on Google Fusion platform GIS and sampling data platform Ability to create custom tables and plots
Watershed Platform Data
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Data Table
Data Plot
Fluorescence Basics
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Basics:1) Small volume sample2) Minimal preparation3) Quick (< 10 Minutes)4) Produces EEM
EEM (Excitation‐Emission‐Matrix)1) Third dimension is Intensity2) Overall fingerprint of organic
species in the water sample
Fluorescence Analysis
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Other measures:1) Peak Picking2) Fluorescence Index3) Chlorophyll‐Algal Pigments
C1 C2 C3PARAFAC Components
PARAFAC Analysis
Fluorescence Monitoring
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Estimate chlorophyll and phycocyanin and other pigments in raw and coagulated water
Monitor source water characteristics-nature Monitor coagulation dissolved organic carbon removal
Akron Water Supply – Lake Rockwell
Raw Water Algal Activity Monitoring
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Fluorescence-based approach Three different measurements from same EEM,
still working on pigment differentiation
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3/2/14 3/22/14 4/11/14 5/1/14 5/21/14 6/10/14 6/30/14 7/20/14 8/9/14
Method 1
Method 2
Method 3
Raw Water - Part 2
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Chlorophyll and other pigments plus phycocyanin and phycoerythrin
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3/2/14 3/22/14 4/11/14 5/1/14 5/21/14 6/10/14 6/30/14 7/20/14 8/9/14
Method 1
Method 2
Method 3
Phycocyanin
Phycoerythrin
Coagulated Water
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Can we monitor cell lysing via fluorescence?Recall fluorescence monitoring part of normal operations!
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3/2/14 3/22/14 4/11/14 5/1/14 5/21/14 6/10/14 6/30/14 7/20/14 8/9/14
Method 1
Method 2
Method 3
Phycocyanin
Phycoerythrin
HAB Alert System
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Multiple Alert Systems Response (DSS) – Oxidant, PAC, Coagulant
Test New Water Plant Response Alternatives
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Evaluate options for managing HABs in the watershed and the plant. PAC Testing – Target Dissolved Compounds Coagulant Jar Tests – Target Dissolved Compounds
and Particulates (e.g. algal cells) – not presented today due to time limitations
Nutrient Management
Test New Water Plant Response Alternatives
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PAC Testing July RAW sample (second round) No pre-oxidation or coagulant, 15
and 30 mg/L dose One hour contact time UV and fluorescence removal
Company PAC Name Iodine # Origin of MaterialStandard Purification (Standard Carbon) Watercarb 500 WoodStandard Purification (Standard Carbon) Watercarb‐L 500 LigniteStandard Purification (Standard Carbon) Watercarb 800 800 Bituminous Coal
Carbochem LQ‐325 800 Bituminous CoalCarbochem P‐1000 1000 Ancient Chinese Secret ‐ Blended
Cabot (Norit) Hydrodarco B 500 min LigniteCabot (Norit) Hydrodarco M 550 min Secret BlendCabot (Norit) PAC 20BF 800 min Bituminous Coal
Biogenic Reagents, LLC Carbon Substrate 300 (UAC‐H2O 300 IN) 300 Biomass
Biogenic Reagents, LLC Carbon Substrate 500 (UAC‐H2O 500 IN) 500 Biomass
Biogenic Reagents, LLC Carbon Substrate 700 (UAC‐H2O 700 IN) 700 BiomassBiogenic Reagents, LLC UAC‐H2OW (Ultra Adsorptive Carbon) 500 Wood
Calgon Carbon Corporation WPC 800 (min) CoconutCalgon Carbon Corporation WPH 1000 1000 (min) Bituminous Coal
Jacobi Carbons, Inc. Aquasorb CB1‐MW PAC‐F 950 (min) Coconut & (lignite‐proprietary secret blend)Jacobi Carbons, Inc. Aquasorb CP1‐F PAC‐F 1000 (min) Coconut
Fluorescence and UV Removal
24Note: Ranking 1 indicates HIGHEST removal
Sample ID C1 C2 C3 UV
C11 1 1 1
C22 4 8 2
C33 2 2 4
C44 6 9 7
C55 5 4 5
C66 3 3 2
C77 7 7 6
C88 8 5 8
C99 9 6 9
Sample ID %C1 %C2 %C3 %UV
C1 56.5% 57.3% 57.9% 43.4%
C2 42.7% 37.4% < 2% 27.7%
C3 40.1% 33.1% < 2% 18.3%
C4 39.2% 39.5% 47.3% 27.7%
C5 40.0% 36.5% 37.9% 24.3%
C6 31.4% 27.6% 17.0% 18.7%
C7 42.5% 39.7% 48.3% 26.4%
C8 17.7% 16.7% 29.3% 13.6%
C9 23.9% 21.3% 34.4% 14.5%
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Validated Models and Operational Response
Most of the focus on this part of system
New data sources initiate new modeling efforts
New chemicals (e.g. coagulant, PAC, oxidant) initiate new modeling efforts
Difficult but where measurable change happens
Expertise required
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Water Plant Decision Support SystemWe started with a focus on coagulation and THM formation because:
Algal toxin management involves (a) intact cell removal (>99.5% by coag.) and (b) extracellular removal
Want to integrate daily operations approach into HAB response
We are also applying this approach to other operations
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Settled Turbidity (ST) Modeling
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Target
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86*T
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Training: R=0.92677
DataFitY = T
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Target
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Validation: R=0.90839
DataFitY = T
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Test: R=0.84621
DataFitY = T
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All: R=0.91334
DataFitY = T
Last 4 years of daily values at Akron
Significant variation in water quality and weather
Multiple model functions tested including ANN, SVM, MFLR, etc.
Ongoing work to improve the models
ST = f(coagulant,KMnO4,ClO2,Raw Turbidity, Temp, others)
Multi-Objective Visualization Example
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Normal operations – can see the cost of lower settled turbidity and/or reduced THM (conflicting objectives)
In “real-time” can calculate distance from optimum
Decision Support Interface
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Operator can adjust the target and dashboard will make recommended dose of different chemicals
Review of historical data shows chemical savings opportunities
Still working on:(a) Built in constraints based
on chemical control flexibility and reasonable dose ranges
(b) Connection with other objectives (e.g. filter run rules)
Bridging the Gap – Moving Forward
30
Water Plant Data Collection
and Data Analytics
Operational Decision Support
1. Monitoring Program(s) – always evolving
2. Model Development –based on latest science and inputs
“The Gap”
1. Watershed2. Water Plant3. Distribution System
1. Require Monitoring Data Linked to Operations2. Test New Water Plant Response Alternatives3. Validated Models and Optimum Operational Response
1. Toxin Testing2. Many Objectives