1. Taylor Creek Algal Turf Scrubber®
(ATS™) Nutrient Recovery Facility
Performance Review (Jan 2007- Aug 2008)

2. TC-ATS™ Operational Summary
Operation began in late
January 2007
Severe drought which ended in
early July 2007 impacted
startup operation and system
performance
Algal die-offs in September
2007 and May 2008
Investigations of water quality
conditions and operational
parameters initiated in July
2007
Causative factors remain
unidentified
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3. TP lb removed
1/
28
/
0
1000
2000
3000
4000
5000
2/ 200
2/ 5/2 7
19 00
2/ / 20 7
2 0
3/ 6/ 20 7
1 0
3/ 1/ 2 7
1 00
3/ 9/ 20 7
26 0
7
4/ / 20
0
4/ 8/2 7
16 00
4/ / 2 7
23 00
/ 7
5/ 200
5/ 7/2 7
21 00
/ 7
6/ 200
6/ 3/2 7
1 00
6/ 1/ 20 7
18 0
/ 7
7/ 200
2 7
7/ /20
0
7/ 9/2 7
1 00
7/ 6/ 2 7
29 00
/ 7
8/ 200
8/ 6/2 7
1 00
8/ 3/ 20 7
26 0
7
9/ / 20
0
9/ 4/2 7
10 00
9/ / 2 7
2 00
10 3/ 20 7
/ 0
10 1/ 2 7
0
10 / 7/ 07
/ 20
10 15/2 07
/2 0
0
11 2/2 7
0
11 / 4/ 07
/ 20
11 12/ 07
/ 20
Date
11 19/2 07
/ 0
Projected TP Load Removal – 4,000 lbs/yr
12 29/ 07
/ 20
12 10/2 07
/ 0
12 17/ 07
recovered-based TP load removal
Phosphorus Removal Summary January 2007 through December 2008
/ 2 20
7/ 07
1 / 2 00
1/ 6/2 7
1 00
1/ 3/ 20 8
2 0
1/ 0/ 20 8
28 0
8
2/ /20
0
2/ 4/2 8
1 00
2/ 7/2 8
25 00
8
3/ /200
3/ 3/2 8
(Projected TP Load Removal = 4,000 lbs/yr)
10 00
3/ /2 8
2 00
3/ 3/2 8
3 00
4/ 1/ 20 8
1 0
4/ 4/ 2 8
2 00
5/ 8/ 20 8
1 0
5/ 2/ 20 8
26 0
8
6/ / 20
0
TP Cum ulative Load Rem oved Based Upon Water Quality Calculations lb
6/ 9/2 8
23 00
8
7/ / 20
0
7/ 7/2 8
TP Cum ulative Load Rem oved Based Upon Total Solids Recovery Calculations lb
21 00
8
8 / 20
11 /4/ 08
Huge disparity between water quality-based and solids
/ 1 20
11 0 / 08
TC-ATS™ Performance Summary
/ 20
12 24/2 08
/1 0
5/ 08
20
08
569.95
Phosphorus removal performance remains below projections
105.78
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4. Results of Investigations on TC-ATS™
Reduced Performance
No improvement in treatment performance
with reduced Linear Hydraulic Loading Rate
Nutrient supplementation did not enhance
algal productivity
Tests addressing analytical discrepancies
yielded no conclusive results
Collaborative work with UF-IFAS and FDACS
has not identified with certainty which
factors are interfering with turf production
and nutrient removal
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5. What’s being proposed?
Continue investigation of water quality
conditions impacting treatment performance
Focus investigation on identification of
substances deleterious to TC-ATS™
performance
Hydromentia will focus on identifying the
agent or causative factor inhibiting algal
growth
Hydromentia will produce a final report
describing their investigation and
information gained from 3 years of operation
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6. Resolution
A Resolution of the Governing Board of the South
Florida Water Management District to authorize an
amendment to contract 3600000952 with
HydroMentia, Inc., for one additional year of
operation and maintenance of the Taylor Creek Algal
Turf Scrubber® Nutrient Recovery Facility, and
authorize a Sole Source Procurement as an
exception to the general standards of competition, to
extend the term from January 31, 2009 to January
31, 2010, and to increase funding in the total amount
of $300,000, for which Ad Valorem funds are
budgeted; providing an effective date. (Contract
Number 3600000952-A03) (David Unsell ext. 6888)
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