Agenda 12/10/2014 PELICAN BAY SERVICES DIVISION
Municipal Services Taxing & Benefit Unit
NOTICE OF PUBLIC MEETING DECEMBER 10, 2014
THE WATER MANAGEMENT COMMITTEE OF PELICAN BAY
SERVICES DIVISION WILL MEET AT 1:00 PM ON WEDNESDAY,
DECEMBER 10 AT THE COMMUNITY CENTER AT PELICAN BAY,
LOCATED AT 8960 HAMMOCK OAK DRIVE, NAPLES, FL 34108.
AGENDA
1 . Roll call
2. Agenda approval
3. Audience comments
4. Update on pilot lake treatments, including status of blue tilapia
installations
5. Discussion of lake bank erosion restoration methods
6. Update on copper levels in lakes and Clam Bay
7. Update on filtration systems: filter marsh vs. vacuum airlift
8. Developing an educational outreach campaign to alert residents as to
the presence of nutrients in recycled water and the need to reduce
use of fertilizer as a result
9. Adjournment
ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO
ONE (1) MINUTE PER ITEM TO ADDRESS THE BOARD. THE BOARD WILL SOLICIT
PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON
WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD
ENCOURAGES YOU TO SUBMIT YOUR COMMENTS IN WRITING IN ADVANCE OF
THE MEETING. ANY PERSON WHO DECIDES TO APPEAL A DECISION OF THIS
BOARD WILL NEED A RECORD OF THE PROCEEDING PERTAINING THERETO,
AND THEREFORE MAY NEED TO ENSURE THAT A VERBATIM RECORD IS MADE,
WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL
IS TO BE BASED. IF YOU ARE A PERSON WITH A DISABILITY WHO NEEDS AN
ACCOMMODATION IN ORDER TO PARTICIPATE IN THIS MEETING YOU ARE
ENTITLED TO THE PROVISION OF CERTAIN ASSISTANCE. PLEASE CONTACT
THE PELICAN BAY SERVICES DIVISION AT (239) 597-1749 OR VISIT
PELICANBAYSERVICESDIVISION.NET.
12/8/2014 2:51:42 PM
ResnickLisa
Subject: Lake Bank Erosion Methods
From: Jim Carr [mailto:jim.carr@abbinc.com]
Sent: Tuesday, December 02, 2014 4:32 PM
To: ResnickLisa
Cc: Kevin Carter; Neil Dorrill
Subject: FW: North Berm + Riprap & Riprap vs Geo-textile Tubing?
Hi Lisa,
I am out of town but I asked Tom Barber to answer your Lake Bank erosion questions. Tom and Rick Barber
have worked on some lake bank restoration projects recently in communities similar to Pelican Bay. See
responses in red below. Thanks.
Jim
From:Tom Barber
Sent: Monday, December 1, 2014 4:14 PM
To:Jim Carr; Rick Barber
Subject: RE: North Berm + Riprap & Riprap vs Geo-textile Tubing?
Jim, here is what I have . . . See below in red for question 3.
Thanks,
Tom Barber
Agnoli, Barber, & Brundage Inc.
7400 Tamiami Tr. N.,Suite 200,Naples, FL 34108
Phone(239) 597-3111
barber.t @abbinc.com
Lake Bank Erosion
We are coordinating a lake bank erosion survey to determine which lake banks need to be repaired and from
that priority list, we will create a two-year schedule of lake bank restoration repair projects to recommend to our
board. Currently, our lake bank restoration program uses the geo-textile tubing method; however, we have been
getting increased requests for riprap.
1. What is the cost per unit difference between riprap and geo-textile tubing? Rip Rap averages around
$85 per linear foot installed, ranging from$55 to $120 depending on the products used and construction
access. Geotextile tubing costs range from $40 to $60 per foot and averages around $50 per linear foot.
2. For lake bank erosion, is one method more effective? Our experience has lead us to believe that
Geotubes are not the most robust long term solution, they exacerbate the lake bank grade differential
problem and create an artificial wall that can break and lead to erosion over time. In dry months when
lake levels are low the geotubes can be directly exposed to sunlight and the material they are comprised
of can be susceptible to breakdown/cracking. We have recently replaced failing geotube that was
installed no more than 5 years previously in other communities, the method we replaced it with is known
as cellular confinement
The cellular confinement (GeoWeb) method utilizes an anchored HDPE grid that has cells that are then
filled with stone, picture shown below. The entire product is covered by dirt and sod, leaving no
exposure to sunlight and a reinforced lake bank that recreates the gradual slope of the backyard into the
lake and extends 2' below the control elevation of the lake. We can provide more information about this
product and design examples of areas of successful lake bank remediation.
1.
GeoWeb (during construction)
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Also, the planting of heavy littoral plants and re-grading the lake bank can help stabilize the side slopes
and greatly decrease the potential for future erosion. Pelican Bay is fortunate to be closer to the coast
and have minimal lake fluctuation which lends itself to sustain the health of the littoral plantings through
the dry season.
3. We understand that are the limitations to using riprap to repair lake bank erosion. What are those
limitations? The first limitation is governmental, both Collier County and South Florida Water
Management District regulate that you cannot exceed 40%of the lake's total perimeter in rip-rap and/or
retaining wall. Physical limitations included limited access, if placed behind homes, the homeowners no
longer have unobstructed access to the lake bank. In heavy wind events smaller rip-rap has the
propensity to move in wave action and wear holes in the filter fabric below. This can lead to unwanted
upland erosion in certain cases. Aesthetic limitations also exist, over time algae/mold can develop on
the rip-rap.
2
ResnickLisa
From: david trecker[djtrecker @yahoo.com]
Sent: Thursday, December 04, 2014 1:23 PM
To: ResnickLisa
Subject: Lakebank Erosion
Lisa - Please transmit to Neil, with a copy to Tom Cravens and Susan O'Brien.
Neil -
I have a number of questions about the lake bank erosion data you presented to
the board yesterday.
- Who measured it and when?
- How were the drop-off measurements made?
- Were the measurements made all around the indicated lakes or just at one or
two spots?
- Is there any indication the other 59 lakes have similar erosion problems?
I'm concerned because this issue was dropped on us without any warning and
because its remediation will obviously be costly.
A response before the Water Management Committee meeting on Wednesday would be
appreciated.
Thanks, Dave
1
ResnickLisa
Subject: Wed, Dec 10 Water Management Committee FW: Blue Tilapia
From: david trecker[mailto:djtrecker(ayahoo.com]
Sent: Saturday, December 06, 2014 11:37 AM
To: ResnickLisa
Subject: Fwd: Blue Tilapia
Lisa-Please forward to the other PBSD directors and Neil and Marion. Also, please include in packet for the WMC
meeting. Thanks,Dave
Begin forwarded message:
From: Mike Bauer<mbauer(a�naplesgov.com>
Subject: FW: Blue Tilapia
Date: December 5, 2014 at 2:37:50 PM EST
To: "ditrecker(a vahoo.com" <ditrecker(c�yahoo.com>
From: Katie Laakkonen
Sent:Tuesday, May 27, 2014 2:48 PM
To: Mike Bauer
Subject: Blue Tilapia
http://en.wikipedia.org/wiki/Oreochromis aureus
Invasive species
Since its introduction into Florida in 1961m the fish has increased its range and frequency of occurrence. It is now the
most widespread foreign species in Florida, with established populations as far north as Lake Alice, in Gainesville.
Florida.u It is a major management problem for the National Park Service due to its predominance in Taylor
Slough in Everglades National Park, where it has changed the fish community structure.v The species is also expanding
its range in Texas, is responsible for inhibition of the population of Largemouth Bass in Lake Trinidad, and is implicated in
the unionid mussel declines in two bodies of water in Texas.0 It is also blamed for a severe decline in native fish
populations in Warm Springs Natural Area.0
Katie Laakkonen
Environmental Specialist
City of Naples, Natural Resources
295 Riverside Circle
Naples, FL 34102
Office:239-213-7122
Fax: 239-213-7127
klaakkonen@naplesgov.com
www.naplesgov.com
1
ResnickLisa
Subject: Wed, Dec 10 Water Management Committee
From:david trecker [mailto:djtrecker @yahoo.com]
Sent: Saturday, December 06,2014 11:40 AM
To: ResnickLisa
Subject: Fwd:
Lisa-Please forward to the other directors and Neil and Marion. Also,please include in the packet for the WMC meeting. Thanks,
Dave
Begin forwarded message:
From:Mike Bauer<mbauerRnaplesgov.com>
Date: December 5,2014 at 2:37:33 PM EST
To:"ditreckert vahoo.com"<ditrecker(a yahoo.com>
U.S. Habitat: Fresh or brackish waters, ranging from creeks and streams to lakes.The blue tilapia is adaptable to salinity levels
allowing it to inhabit and reproduce in both freshwater and brackish areas.
http://www.tsusinvasives.oro/database/blue-tilapia.html
Oreochromis aureus
Blue Tilapia
Class: Actinopterygii
Order: Perciformes
Family: Cichildae
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Source:http://www.fishfarmingbusiness.com/
Description
Adults range from about 5-8 inches in length and can weigh 5-6 pounds; however, the largest recorded specimen was up
to 21 inches and weighed more than 10 pounds. Oreochromis aureus has a blue-grey body with a white belly and 20 to 26
gill rakers. The caudal fin of the blue tilapia has broad bright red or pink distal margin. The head of the male fish will
change into a bright metallic blue shade, during the breeding season, and he will also display a vermilion pigmentation on
the edge of his dorsal fin and an intense pink coloring on the margin of his caudal fin. A breeding female fish will develop
a pale orange color on the edges of her dorsal and caudal fins.
Ecological Threat: When Oreochromis aureus is present it can diminish plant, fish and shrimp diversity in freshwater
areas. Blue tilapia has also been implicated as the cause for unionid mussel declines in two Texas water bodies,
Tradinghouse Creek and Fairfield reservoirs. With a wide range of temperature toleration, the blue tilapia has been able to
establish itself within the Southern Gulf States but could travel northwards. Oreochromis aureus is considered
a competitor with native species for spawning areas, food, and space. Some streams where Oreochromis aureus is
plentiful have lost most vegetation and nearly all native fishes. It has been shown in several states that the blue tilapia's
local abundance and high densities in certain areas have resulted in marked changes in fish community structure. All
species from the genus Oreochromis readily hybridize, potentially posing a threat to genetic diversity through
introgression. If two species from the genus hybridize, that can increase their survivability and expand their invasive
range.
1
TELEPHONE CONVERSATION WITH BILL MORRIS (12/2/14)
Bill Morris heads a group responsible for water management in Pelican
Pointe, a 20-year-old community of 1388 units in Sarasota County just north
of Venice, FL.
I contacted Morris at the recommendation of Bill Risen, a friend of Paul
Johansen, a resident of the Breakwater in Pelican Bay.
Pelican Pointe has 67 retention ponds (lakes) in three basins, the runoff from
which goes into Hatchet Creek.
55 of the lakes catch runoff from well water, which is used for irrigation.
Algae in those lakes is controlled by littoral plantings, which are required by
Sarasota County. (Twelve specific plants are recommended.) Some chemical
treatment is used when necessary.
Units in the basin containing the remaining 12 lakes use recycled water,
which, like ours, is loaded with nutrients (dissolved nitrogen and phosphorus
from fertilizer). Those 12 lakes are called "the dirty dozen" because of
continuing algae problems. Aeration, plantings and chemical treatment are
used in an effort to control algae bloom. Duckweed is less of a problem.
Blue tilapia were put in all 67 lakes but were said to have had no long-term
effect on the algae. The fish were considered a nuisance because they ate
shoots from the littoral plants. An environmental engineer recommended to
Sarasota County that the fish be removed from all of the lakes. An outside
firm is to net the fish and sell them for food.
Morris invites the PBSD to visit, view their lakes and review their activities.
Dave Trecker (12/3/14)
TELEPHONE CONVERSATION WITH RAFAEL VASQUEZ-
BURNEY (11/19/14)
Rafael is a member of CH2M Hill, the consulting outfit the PBSD uses to
sample, analyze and report on water quality in our upland lakes.
In an earlier Water Management Committee meeting, Rafael advised against
using blue tilapia to control algae. My telephone call was intended as a
follow-up on those comments.
Rafael said the tilapia gills catch the macro algae but let the small algae pass
through. The small algae thrive and multiply and eventually create a
turbidity in the lakes, which take on a green hue.
Further, he said, the fish droppings are rich in ammonia, the most
bioavailable of the nitrogen nutrients. So the fish transform nitrates and
nitrites taken up by the algae into ammonia, ironically creating the best
possible situation for algae growth.
He concluded that, over the long haul, the fish defeat the purpose of
controlling algae.
Rafael will elaborate on this at subsequent PBSD meetings.
Dave Trecker (12/3/14)
MEETING WITH BETH JOHNSSEN AND DANETTE
KINASZCZUK ON RECYCLED WATER (11/10/14)
I met with Beth Johnssen, Director of Wastewater (Public Utilities
Division), and Danette Kinaszczuk, Pollution Control Manager (Growth
Management Division) to discuss recycled water in Pelican Bay.
Two things, neither unexpected, came from the meeting.
(1) Pelican Bay uses a large amount of recycled water for irrigation— 3.2-
3.5 million gallons per day for residents and businesses and 0.5
million for the golf course at The Club Pelican Bay. The target is 1.7-
1.9 million gallons per day for Pelican Bay based on the SFWMD
guideline of 1 inch/acre-week.
(2) The high levels of nutrients— 2.1 mg/L of dissolved nitrogen and 2.0
mg/L of dissolved phosphorus —in the recycled water were not
challenged. The officials said the nutrients could be removed or
reduced, but the cost would be prohibitive.
I asked for historical data and breakdowns by areas in Pelican Bay, but I
have received nothing yet. I will follow up.
Dave Trecker (12/4/14)
Tilapia Fact Sheet
Genus,species: Oreochromis spp. (Gunther 1889), Sarotherodon spp.(Rupper 1852),
Tilapia spp. (Smith 1840)(TSSG 2006))
Common Names: Tilapia(with a lower case"t"refers to all three species),boulti,
freshwater snapper, mojara,ngege, St. Peter's fish (ISSG 2006).
Taxonomic Synonyms: Oreochromis spp., Sarotherodon spp.. and Tilapia spp. inlcude
roughly 70 species (ISSG 2006)
. 4
Photo credit:MIT Sea Grant College Program.
Tilapia are an economically important food fish that have the potential to out-
compete native species in tropical environments across much of the southeastern United
States. The species, blue tilapia, is the most abundant invasive fish species in the
southeastern United States. They are successful aquaculture fish because they are hardy
and easy to grow, white-fleshed, mild-flavored, and appeal to the palate of consumers.
Life History: Similar to the grass carp,most tilapia species are herbivores that have the
potential to alter aquatic plant populations and ecosystems. Tilapia are mouth brooders,
which means eggs hatch in the mouth of the female,and the female protects the hatched
young from predators in her mouth (GSMFC 2003).
Means and Time of Introduction: From the 1980s,tilapia were introduced as
aquaculture species that are often farmed in cages in open bodies of water. The fish can
escape if the cage becomes damaged due to environmental forcing, such as hurricanes,
storms,or human actions. Throughout the world,documented cases of tilapia
introductions are frequently due to both release and escape (TSSG 2006). Blue tilapia
(Oreochrmomis aureus)were introduced to Gulf states for weed control,in other cases it
was for weed and insect control. They also have been released from aquariums and fish
farms(GSMFC 2003).
Origin: Tilapia is originally from the Middle East and Africa(ISSG 2006).
North American Distribution: Blue Tilapia(Oreochromis aureus) can be found in
Florida, Alabama, and Texas, although Alabama winters often do not allow survival of
most populations (GSMFC 2003). Other tilapia species,many of which formed hybrids,
are established in southern California irrigation ditches where they were introduced to
control aquatic macrophytes.
Habitat: Tilapia can be found in lakes,wetlands, marine habitats,water courses,
estuaries, and marine environments. They prefer tropical environments with water
temperatures in the 25-30°C range. Some species can tolerate cold temperatures down to
the point of 8 or 9°C. Sensitivity to salinity also varies greatly between species; some
species can fully tolerate seawater(ISSG 2006). Some species have been shown to
tolerate salinities above 45 psu,but they may not reproduce at those salinities(GSMFC
2003).
Ecological Impacts: Blue tilapia have become the most abundant invasive fish species in
the Gulf states. Tilapia often compete with native species for the same type of food, and
can therefore cause declines in native populations(GSMFC 2003). Tilapia that have
escaped from aquaculture facilities may interbreed and form hybrids(Costa-Pierce 2003).
Some species such as the Mozambique tilapia(Oreochromis mossambicus)have
outcompeted native fish species and preyed on native larval fish in areas where it was
introduced.
Economic Impacts: Tilapia may compete with native fish for nesting space or food and
thus have the potential to negatively impact native populations in warm environments
(GSMFC 2003).
Literature Cited:
Costa-Pierce,Barry 2003. Rapid evolution of an established feral tilapia (Oreochromis
spp.): the need to incorporate invasion science into regulatory structures. Biological
Invasions 5: 71-84.
GSMFC (Gulf States Marine Fisheries Commission) 2003. Fact Sheet for Oreochromis
aureus. 21 November 2003. htto:.-nis.:`rAnt c.ori ni i'actsitwc:.pltp!tt i4_ 9. . Last
accessed: 15 May 2006.
ISSG(Invasive Species Specialist Group)2006. Ecology of Oreochromis spp. Global
Invasive Species Database. 12 January 2006.
ssg.orL datahasc specie: ecolu*.asp?si-813&fr=1&sts�s«. Last accessed:
15 May 2006.
Additional References:
FishBase 2006. Species Summaries for Tilapia. uam.fishbase.org. Last accessed: 15
May 2006.
GSMFCb. Fact Sheet for Tilapia zilli. Gulf States Marine Fisheries Commission. 3
August 2005. http:%"nis.gsmfc.org%nis factsheet.php?toc_id=200. Last accessed: 15 May
2006.
GSMFCc. Fact Sheet for Oreochromis mossambicus. Gulf States Marine Fisheries
Commission. 3 August 2005. http:/Inis.gsmfc.org/nis factsheet.php?toc_td=195. Last
accessed: 15 May 2006.
GSMFCd. Fact Sheet for Tilapia mariae. Gulf States Marine Fisheries Commission. 3
August 2005. http:-!nis.gsmfc.org-n.is factsheet.php''toc id=199. Last accessed: 15 May
2006.
Last Updated: 28 June 2006.
Benefits Of Stocking Blue Tilapia
• Blue Tilapia eat many of the common types of filamentous algae,blue green algae,
chara, duckweed,watermeal, nuisance rooted aquatic vegetation.A perfect par with
the amur who will not eat these types of algae
• Prolific breeders
• Fish spawn when they reach 4"\water temperature is above 68 F
•Lay up to 1500 eggs per female
• Spawn every 18 to 21 days
•The babies are the ones that put the biggest strain on the algae\by converting
vegetation into a bait fish for your predator fish.
• Reduce demand on minnows and Amurs
• Increase the size and population of other fish in your pond.
• Fall temp cause fish to slow down allowing predator fish of all sizes to gorge itself just
in time for winter
• Control Muck
• Reduce unpleasant gases
• Most Eco Friendly solution to controlling algae, no more chemicals
• Finally a solution from vegetation for pond owners who use their pond as a water
supply.
•A perfect substitution for the bluegills since they can not take over your pond.
The list goes on but the time is now we only sell these the first part of June and we have
secured a big supply however demand for the fish is great. Please call and place your
order for these fish today. Fish supplied first come first serve bases
Blue Tilapia Stocking Density Chart
* Existing Size of Predator Fish.if no Large Mouth
Amount of Bass was stocked than subtract 2"from the
Pond predator size
Covered by Stocked Lbs of -
Aquatic- Tilapia per Acre * Less than *8"-10" *10"-12" *12"+
Vegetation of Water 8"
Little 10-151bs Stock Stock Stock Stock
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BEST SUPPRESSION OF ALGAE TO DATE
Lake Treatment
3-5 Aeration + Plantings + Bacteria(1)
3-6 Aeration+Plantings + Bacteria (1)
3-7 Aeration+ Plantings +Bacteria(1)
3-1 Aeration+Plantings (2)
1-6 Aeration (2)
2-2 Plantings (2)
5-1 Tilapia (2)
(1) Visual examinations in 2/14, 5/14, 9/14 and 11/14
(2) Visual examinations in 9/14 and 11/14
Observations
• Combination of aeration +plantings + bacteria remains the best of the
nine pilot treatments started 14-16 months ago. Bacteria may not be
essential.
• Tilapia treatment (5/14) appears to be effective
• Some of the lakes with little or no algae have some duckweed along
their perimeters.
• There is no correlation between treatment effectiveness and nutrient
levels, which remain high in many of the lakes which have little/no
surface algae.
COPPER LEVELS IN THE LAKES
Copper (ug/L)
Basin 3/13 8/13 11/13 2/14 5/14 8/14
1. 76 20 48 49 21 16
2 294 57 46 134 52 22
3 163 31 86 96 67 42
4 408 73 58 59 39 48
5 102 157 31 36 35 14
6 4.6 3.0 3.4 2.7 3.5 2.7
Between 11/13 and 8/14, measurable copper has ...
• Declined in 34 lakes
• Increased in 4 lakes
• Remained the same in 5 lakes
Copper remaining in lakes is due to ...
• Incomplete run-off into Clam Bay ?
• Equilibrium with copper in sediment ?
AVERAGE COPPER LEVELS IN CLAM BAY, ug/L (1), (2)
2011 (6) 2012 (7) 2013 (8) 2014 (9)
Outer Clam Bay (3) 1 .5 1 .6 4.0 3.3
Inner Clam Bay (4) 5.8 5.7 9.3 6.4
Upper Clam Bay (5) 9.2 8.9 7.3 6.0
(1) State limit = < 3.7 ug/L
(2) Outliers (>40) excluded
(3) Station CB6 for 2011/2012, stations W1 + W6 for 2013/2014
(4) Station CB3 for 2011/2012, station W7 for 2013/2014
(5) Station CB1 for 2011/2012, station UCB for 2013/2014
(6) Five monthly readings
(7) Two monthly readings
(8) Twelve monthly readings
(9) Eight monthly readings to date
Bad News: There has been no significant reduction in copper levels in
Clam Bay since the FDEP measurements in 2011-12.
Good News: There is a downward trend in Upper Clam Bay over
2011-2014, a slight downward trend in Inner Clam Bay in 2014, and
consistently good readings (excluding an outlier) in Outer Clam Bay. This
suggests tidal flushing may be starting to have an effect.
Observations
• Sampling stations were different in 2011/2012 and 2013/2014.
• Inclusion or exclusion of outliers and the outlier limit chosen (>20, >40?)
greatly affects average readings. How will FDEP handle outliers?
_ _ _, , _ _
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ELISA OD of virus versus time(mean of 4 Elisa tests) Virus particle number per ml sea water:mean of 4 PCR
0 25 results
Q1.0E+07:. .__.__. .._...__. .__...... .. _.
j0.20 •a I
W 1.0E+00 --
•
d 0 15
p E 1.0E+05-.. - •.. ...
0.0.10 O
.�„ 1.0E+04-......_ _.... �. .. ... ..
>0.05 •
G
1.0E+03
0.00 .. _-.__...- - — --
0 20 40 60 80 100 120 0 10 20 30
Time(min) Time(min)
SEARS( 44 `-
VAL Energy Consumption
Energy/Suspended Solids Ratio
0
0
m
c
a,
C
v 0.1
,3
Q
vs
ti
n+ 0.01
NI VS
0.001 S
Vacuum Gass Foam Chamber filter Tangential Nozzle Vacuum filters Decanter bowl Hydro cyclone Polymer Dissolved air
otatiof.r flotation flow filtration discharge centrifuge flocculation flotation•
ti f' centrifuge
5
Source: Thea Coward,Jonathan G.M.Lee,Gary S.Caldwell
"Development of a foam flotation system for harvestine microaleae" In"Aleal Research"Vol.2.Is.2.March 2013.o135-144
VAL Specs Flow Rates
Column Units Degassing Extraction Treatment
ext. diam. built Mode Mode Capacity
(mm) (gal./mn) (gal./mn) (gal./day)
25,000 to
300 12 100 17
150,000
100,000 to
600 25 400 70 600,000
500,000 to
1400 2 2,000 350 3,000,000
1,500,000 to
2 500 2015
In 5 6,000 1 ,000 8,500,000
10
Needs
Depuration
Cleans water(particle removal)and strips TSS reduction and degassing at
dissolved gasses. VOC removal to be tested high water flow
Oil &Gas
6. e. r : sac eria re.0 on, , s ripping
Downstream: Oil &TSS reduction, gas stripping Sustainable solution
Without additives for water treatment
Aquaculture
ter ., .6. .rw'. Efficient solution-
CO2 stripping, particle removing, water circulating for CO2 stripping
Microalgae
•. imizi g e a gae pros uc ion process.
To manage gases and to circulate water during the Reduce harvesting costs
growing process and to harvest algae. to produce algae biomass
a-s ----' 11
Purification
(Oil & Gas, Waste Water, Desalinization)
Af
The VAL manages Upstream or Downstream water.
,, �„�:; ---- -- -__- GAS STRIPPING
Gas management
- ..... — - 02 CO2 N2 CH4.to 0 ppb i Ultra-filtration - . SDI REDUCTION
° 20 to< 3, in seawater
r
r �
OIL EXTRACTION
De-oiling t/
500 to <20 ppm in seawater
SEAREN wY-..,._
SDI & Dissolved Oxygen Results
Silt Density Index (SDI) reduction: from 19 to 2.5 r
20
18 't
16
12
to I
N2 %
4 \-^-.......„..,..„._...,._....,...___ '
2 r
Number of Cycles
0 1.67 333 5 73 10 15 20 40111.MI,
Reduction of Oxygen: from 8,000 to 9 ppb . gig'
-'
Transmittance of the water: Final
97% of that of the ultra pure SDI: 2.5
s
,l#;-_- - OZ: 9 ppb ..
it r . , ,,," �1
I�,a■ to l._,, �, .4
:-- .-..'t. -`— 13
Water De-Oiling Results
7
r N
1 ----q
r¢ Extraction V 44-
=@1;
VAL' s Desalination Fit
Ocean Water Si Er ' STEP 2 STEP 3
Pre-Treatment Reverse Osmosis Conditioning+diiislntiiectlnn
i
4 4
f
r(
Pre-filtration: Post-treatment:
micro-particles Degassing
and de-oiling Higher efficiency for RO
-Lower maintenance
-Lower OPEX .
iw
i'EARE
Application in purification
rj;,- . i ,. . , , , I : ...., „,,,, vo •,. 4' .
9 \ I . 4 J;■
----7- f . ., v j y 'i i vt ,.; ' .. cl fiti." It.y:,,, fp!, I '
,i •. It ,-•• -i-, ,Iii,ik L.R1t ..:-.-
. 7 ...,,ii. . 'k'\k, ii., - , i r ,tp.4vrtP
' ' . - i , 11 , 111,4 t'19`g 41 '• ,,ti aim - t,' : ,4a., �.4 , . . rlq II'`�°� �'�'
4 'r
r 14,.I t+
.�� -- t ae�..w-,...., i-;,,�r 1 T 4 ,: AIM �f-,fir. / �i
^Sp .„ ..
Landfill Leachate Trials
140 , is,
, 4 ,
'
,
120
t."---o 100 4,200 mg/I
t;42. go / ..."..'''''''''°*"...4 I\, r In 1/1000 i
...7. i.,, Low discharge, 1 of the initial i
o
2! so
c HS leachate's salinity ;t P
CU
c
0 40 :/ ....
u ,
C., 0
20
This trial's salinity - j)
Initial:250 mg/I :
0 10 20 30 40 . .,
Final: 130 mg/I
Salinity(%.)
Or,
_ '''-z,--;;--41'.:;:----3,;:t
. _
. _
—–
, --
Estimated Costs
For 25 m3/h Treatment Capacity (1609000 gpd)
. , Gas Particle
. Function Total
„St i_e ling . , ..Extraction.
E 1 VAL 4 VALs VAL
s
5
quipment
(600 model) (1000 model)
CAPEX Price* $30,000 $260,000 $290,000
Per year (10 years $3,000 $26,000 $29,000
deprec.)
OPEX Energy** (6.32 cts/kwh) $9,412 $221 ,453 $230,865
(Per year)
Maintenance $600 $6,000 $6,600
Total cost/year (with VAL) $13,012 $253,453 $266,465
Current cost/year(without VAL) ,= $2,920,000
tIrlil*
*Pricing may vary based on specific setup requirements.**Energy may be reduced with optimization of the system.
, .-...
Wastewater + CO2 bioremediation pilot
Water circulation and
gas exchange system
d I■ 1�
`• �'` j ' T I
� z� • i� , „,
Tubular reactor z •�
SEAREN _. 19
Micro-algae remediation performance
Type of Examples Type of Treatment Comment
pollutants treatment performance
Nutrients CO2,NO3, NH4, Assimilation 80 a 100% Pilot testing
PO4
Metals Toxic,rare, Biofixation 60 a 90% Lab results and
radioactive publications on
As,Cr,Cd,Cu,Mn, microalgae biofixation in
Ni,Hg,Pb,U open systems HRAP
Pharmaceuticals Diclofenac Photooxydative 100% Lab results and
Sulfamethoxyazole degradation 60 a 100% publications
Pesticides Thiamethoxam Photooxydative 100% Lab results and
biodegradation publications
Organic Bisphenol A Photooxydative 65% Lab results with selected
micropollutants degradation microalgae strain
Microorganisms Coliforms Photooxydative 4 log Pilot testing
disinfection 99,99%
.
Low-density micro-algae harvesting
in open ponds
22
• For a concentration of approx. 0.02 to 18
0.05 g/L DW is
•Average harvest concentration of `s 12 -
A
approx. 2 g/L DW =
10 -
E 8 .
• Floc concentration comprised of 6
between 12 and 20 g/L DW '
2 _:
Culture Harvest Flocculation
Concentration Factor
(CF) after harvesting 20 to 100
CF after flocculation 300 to 800
Biomass in the floc 60%to 80%of total
harvested biomass
SEAREN
1
Harvest of Nannochloropsis
Culture (4x) Harvest(4x)
1
CF> 170x
Culture (40x) Harvest(40x) -
•
SEAREN
Case study: Cost comparison
100 acre ponds
Function: 1 Circulation/mixing CO2 dissolution 02 Harvesting
+pumping stripping (14 H/day)
A
Paddle wheels Carbonating
Equipment: +pumps stations ? DAF+thickeners
CAPEX: $500,000 $250,000 ? $2,000,000
Energy: 1,000,000 kWh/Year 150,000 kW/Year ? 20,000,000 kWh/Year
Equipment: 40 Vacuum Airlifts (diam. 2500 mm)
Function: ✓ ✓ ✓ ✓
CAPEX: $2,800,000
Energy: 300,000 kWh/Year 1,500,000 kWh/Year
OPEX
reduction 90% energy reduction
Pilot for HAB extraction
(VAL 1400) * - .;:
-_ i
Water flow: 125 m 3/h
- Initial algae concentration: 0. 1 - 0.2 g/I
- Harvesting Flow: 50 I/h
- Harvest concentration 10 g/I
- Algae removal: 1 .1 Ib/h* = 26 Ib/d*
f , ` +g
iiEnergy consumption fix;
500 W/lb eq. DW*
I *Equivalent dry weigh
SEAREN ® ._-:.,,-
The vacuum airlift as a production
harvesting system
• Process allowing to combine harvest, circulation and gas exchanges
• Final product after pre-concentration sufficiently concentrated for
final separation
I
Low density open pond
Centrifugation drying +
drying
Vacuum airlift
Efficient system for production and pre-concentration of open
pond low-density microalgae with low energy consumption
Advantages
Multifunctional: gas stripping, foam fractionation,
aeration and circulation
Adaptable: on current tanks without modifications
Scalable: capable of handling up to double production
Security: comfortable margin of performance safety
Evolutionary: VAL will evolve with the company's growth
Upgradable: will easily accept product enhancement
Additional advantages
Control of Emissions: Extracted material (gases, liquids or solids) can
be safely isolated or discharged.
Low foot-print: Small ground space requirement
No Additives: Purely physical process without consumables.
Durable: Robustness and reliability (no moving parts)
Anti-Clogging: Free passage, no clogging
Resilient: Resilient system, can tolerate stoppages and restarts
Simplicity: Simplicity of use and ease of maintenance
Safety: Engine can be positioned away from the tanks.
:w. =-'?,
moz
Searen Americas
4:0 Canada ,
`fx i
� v. i
--4 --,-77-74,-
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Cincinnati base
h' Undid States '04,1,, ,n
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Business offices * e>�
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maneequipment
Demonstration sites },;
a.1.�.
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Distributors N,arag,, awe
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T W,. ?R
VAL Operations and Projects
J ........ I loMand
Nt 3 RAS Sea 10
10 M5.5..5n MI-12 ' •
2q .5 COZ depung am 13
Canada 21 Feesh water RAS mane" Mar.14 0
,,... 22 Mmt rerneat Ape 1.5 , /
23 CO2.TM renmed Aug.14 *- •-<,
. „. 26 5415 CO2 depling /mg IM
27 MI tetanagmg #09 14 , UMed
25 K89d8 rn
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PIVICO3 Fe re020.01 ' 2015
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Ism me lir
90 An ,.._ist" i/12.1116,, •tame it-m5"*,,,,,,,,,,,.,S;;:t . klitt
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ra '''' '''' ,,''. wee T.41. rl.:•,.1. %Omani
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htYarets leadtanSte'treatment*5:210414 ' 147411;27;41 ,Ceoc:6.27- t'""\„, i"..":' 1*••''', Itnn '''
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7 %imam Feb 12 ,.. .'
2 Gas exchange•hydrols, An 10 r-2) DR ConDo 41
8 damming May 12 ( ,,,. aca 70,„,„
1 Ultrahltraron Feb 11
13 Managing Mar 13 , .2 .., eon, , In . IIMI -14, Prele. CO2 removed *2015
16 Mararthng Apr 13
Pent '',. '' • . u 6 anct alma. Nem 11
15 Pelysamands cement An 15 II De tnemenatton Dec 12 M94.7 Zambia..Q. lir
19 CO2 rernedtaeon Mar le I GO 17 De 0 Ifing Dec 12 S ,.1. fr7.4.64*
29 CO2 IttilrellaeOn See le 24 Water Imatment Int 14 ' -h.b-'.'
Pr NvnlIng 7212015 ' u uc
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29
- .
Traction
_
Scientific and tech support Si
.„••
• ffSA Coldep , UNIVERSITY Of la
Cincinnati
Current users
24 VAL in operation Ifremer * microphgt A 1?D A
HelwPur Les poissons Alb SA LI NS
if;Nofirna -,C,. duSoleil. ibr
....,
,., ,......_ _
Integrators/ distributors
agnmarine -+- marine equipment
N....,
Testing users ip,irt/if "......—.
'....."'"...e.----z". ,- S a p p h i r e
t KUTERRA V Energy
SUSTAtx”ILITT IIIIS LARDED
TOTAL
Awards Cluster support
..c CleanTech
..-1:CT CONFLUENCE
____;,..............,--
30
. . ..-.... •
Due to its performance and simplicity,
the VAL is a liquid-solid-gas exchange
platform poised to become a standard
in many applications.
"Simplicity is the ultimate sophistication"
Leonardo Da Vinci
SEAREN 31
vhar
•
-
u A
1 1r
contact@ searen.com
SEAREi .. 32
References:
-Patents:
• "Method and installation for treating an aqueous effluent, in order to extract at
least one dissolved gaseous compound; application to aquaculture in recirculated
aqueous medium." US Patent N°7 771515.June 20,2007.
• "Micro particule extraction process » . US Patent file N° 075071, November 9,
2010.
-Publications:
• Barrut, B., Blancheton, J.P., Champagne, J.Y., Grasmick, A., 2012a. Mass transfer
efficiency of a vacuum airlift - Application to water recycling in aquaculture -
systems.Aquac.Eng.46, 18-26.
• Barrut, B., Blancheton, J.P., Champagne, 1.Y., Grasmick, A. 2012b ater°del Stern
capacity oft—Vacuum airlift Applic tiorr-to waterrecycling in aq IturVgl
Aquac.Eng.48,31-39. x
• Barrut;-B:, Blancheton, J.P., Muller-Feuga, A.,:Rene, F.; Narvaez, C:, Champagne, ,
1.Y., Grasmick, A. Separation efficiency of a vacuum gaslift - Applicatior o
microalgae harvesting.Bioresource Technology 128,235-240.
• Barrut, B., Blancheton, J.P., Champagne, 1.Y., Grasmick, A. Foam fractionation
efficiency of a vacuum airlift --Application to particulate matter removal in
recirculating systems.Aquac. Eng.54, 16-21.