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Can you get more out
of your WTP? –
Optimize it!
Presented By:
Craig Anderson
Jerry Elliott
Michael Grimm
April 30, 2015 1
PRESENTATION OVERVIEW
WTP Audit Team Introduction
WTP Audit Scope
City Facilities
Filtration Testing
Chemical Feed Optimization
Phase 1 Improvements
Discussion
2
TEAM INTRODUCTION
3
WTP AUDIT SCOPE
Operations Review
Staff Interviews
Regulatory Compliance Review
Plant Hydraulic Analysis
Equipment Condition Assessment
Pretreatment Evaluation/Testing
Filtration Evaluation/Testing
Disinfection Strategies
WTP Model
Improvement Cost Opinions 4
PRESENTATION OVERVIEW
WTP Audit Team Introduction
WTP Audit Scope
City Facilities
Filtration Testing
Chemical Feed Optimization
Phase 1 Improvements
Discussion
5
SLUDGE PONDS
CONTROL BUILDING
FINISHED WATER PUMP STATION
1933 FILTRATION PLANT
(3RD CLEARWELL & STORAGE)
6
RIVER PUMP STATION
SLUDGE PONDS
NEW PLANT
OLD PLANT
CONTROL BUILDING
FINISHED WATER PUMP STATION
1933 FILTRATION PLANT
(3RD CLEARWELL & STORAGE)
1930s
1970s
1980s
2000s 7
ONTARIO WTP
8
PRESENTATION OVERVIEW
WTP Audit Team Introduction
WTP Audit Scope
City Facilities
Filtration Testing
Chemical Feed Optimization
Phase 1 Improvements
Discussion
9
OLD PLANT 10
0.01
0.1
1
10
100
Jan-13
Feb-13
Mar-13
Apr-13
May-13
Jun-13
Jul-13
Aug-13
Sep-13
Oct-13
Nov-13
Dec-13
Jan-14
Tu
rbid
ity (
NT
U)
Raw Max Settled
Max Filtered Combined
11
Measuring filter media depth Filter coring tool (in lower left side of photo)
Box excavation with smaller diameter
hollow bucket
Media sample removed with the filter
coring tool (Filter 2 North)
12
13
Measuring filter media depth Filter coring tool (in lower left side of photo)
Box excavation with smaller diameter
hollow bucket
Media sample removed with the filter
coring tool (Filter 2 North)
Filtration Testing
Coordinate map of Old Plant Filters 1 & 2 North media surfaces
14
Filtration Testing Filter Time Collected During Backwash
Cycle (Elapsed Minutes) Measured Expansion
(Inches) Percent
Expansion Filter 1 North 14:00 4.5 12 Filter 2 North 12:00 7 21
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
1 3 4 6 8 10 12 15
Filter 1
Filter 2
Backwash wastewater turbidity (in NTU) over time
15
Filtration Testing
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
1 5 6 7 8 9 10 11 12 14 16 17.3 22.3 25 28.8
Grab
On-line
Filtered water turbidity profile following a backwash event (Filter 1)
16
Filtration Testing
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
1 4 10 12 13 14 16 18 19.5 21 24 27 30 34
Grab
On-line
Filtered water turbidity profile following a backwash event (Filter 2)
17
Filtration Testing
Floc retention analysis for Filter 1 North
-18.0
-16.0
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
0.0
0 50 100 150 200 250 300 350
Filter 1 - Core 4-5 (Dirty)- April
Filter 1 - Core 4-5 (Clean)- April
Dep
th B
elo
w M
edia
Su
rfac
e
Turbidity (NTU)
18
Filtration Testing
-25.0
-20.0
-15.0
-10.0
-5.0
0.0
0 100 200 300 400 500 600 700
Core 15/5 Dirty
Core 4/1 Dirty
Core 4/1 AfterBackwash
Dep
th B
elo
w M
edia
Su
rfac
e (I
nch
es)
Turbidity (NTU)
Floc retention analysis for Filter 2 North
19
Filtration Testing
Calcium carbonate precipitation (CCP)
in filter media
20
PRESENTATION OVERVIEW
WTP Audit Team Introduction
WTP Audit Scope
City Facilities
Filtration Testing
Chemical Feed Optimization
Phase 1 Improvements
Discussion
21
Chemical Feed Optimization
Ferric chloride is cheaper to add than adding ACH and polymer
Lbs/Hour Lbs/Day Gal/Day Price/Lbs Price/Day Price/Month Price/Year
Annual Delivery costs
$300/5000 gallons Total Annual Cost CO2 1251 0.07 $87.57 $2,627.10 $31,963.05 $- $31,963.05
ACH 16 mg/L 72 1728 159.5 0.27 $466.56 $13,996.80 $170,294.40 $3,493.05 $173,787.45
polymer 1.3 mg/L 3.7 88.8 10.2 0.9 $79.92 $2,397.60 $29,170.80 $223.38 $29,394.18
Total $235,144.68 Ferric 17 mg/L 95.6 2294.4 194 0.16 $367.10 $11,013.12 $133,992.96 $4,248.60 $138,241.56
22
Chemical Feed Optimization
Ferric Chloride: choice chemical for Old Plant
– Saves $100K per year
– Only one chemical instead of having to add ACH, polymer and carbon dioxide
– Reduces TTHM values
– Can settle and dissolve all calcium carbonate coming into the plant
23
PRESENTATION OVERVIEW
WTP Audit Team Introduction
WTP Audit Scope
City Facilities
Filtration Testing
Chemical Feed Optimization
Phase 1 Improvements
Discussion
24
25
26
QUESTIONS??
27