Status

1
Coastal Sampling Sponsored by CORDC Coastal
Observing Research Development Center and
Seakeepers Association
Group 5
Andrew Eib Kelsey Burrell Leslie Sjobom
Tyler Sutterley
2
The SeaKeepers Society

• The goal of the International SeaKeepers Society
  is to protect the oceans by monitoring the
  oceanographic changes
• Long term goal is to construct an international
  oceanographic observation network
• Ocean Vessels
• Deep Sea Buoys
• Coastal Piers

International Network
Leslie
3
SK1000 Evaluation at CORDC

• Coastal Observing Research and Development Center
  (CORDC) is evaluating the SeaKeeper 1000 system
  for future pier deployments
• Observation of biofouling and sedimentation
  accumulation in system
• Biofouling is the presence and accumulation of
  biological organisms
• Biofouling is an international problem resulting
  in immeasurable financial losses
• Biofouling causes deleterious effects on sensor
  reading

Leslie
Existing Sensor Chamber
4
Existing System
Ocean-Monitoring Module SeaKeeper 1000TM
Sensor System

• Current Biofouling Prevention
• Use of Copper in Design
• Daily 5 Minute Localized Chlorine Generation
  Method
• Current Sedimentation Prevention
• Coarse Filtration at Input of Pump
• Small Settling Chamber
• System measurements
• 1 gpm flow speed
• 20 psi pressure

45 ft
Submersible Pump
15 ft
Ocean Floor
Leslie
5
Project Description

• Reduce Sedimentation w/in Sensor System
• Reduce Biofouling w/in Sensor System
• Reduce necessary system maintenance
• Maintain modular setup

SeaKeeper Module Sensor Biofouling
Leslie
6
Key Design DecisionsSedimentation

• Sedimentation Chamber
• Negative effects on real time
• measurements
• Severe mixing
• Filter
• Lack of centripetal action
• Mesh clogging
• Pressure purge control
• Hydrocyclone

VU Flow Filter
Kelsey
7
Hydrocyclone

• Centripetal forces
• Removes particulates
• of specific gravity gt 1
• Divided flow
• Clean overflow
• Sediment laden underflow
• (1/5 of input)
• Optimal range of specs
• More robust design
• No mesh
• No moving parts

Hydrocyclone
Kelsey
8
Hydrocyclone Testing

• Sediments pump in water reservoir
• Hose to maintain water level agitate
  sediments
• Hydrocyclone 20 ft above pump

Submerged Pump Testing
Sedimentation Agitation
Kelsey
9
Hydrocyclone Test Results
Underflow vs. Overflow Outputs

• 18 hour test
• No visible particle settling in overflow output
• 48 grams sediments in underflow output

Kelsey
10
Key Design DecisionsBiofouling

• Ozone
• Same treatment as chlorine
• Ultrasonic Transducer
• Power consumption
• UV
• Works well with chlorine
• Low power consumption

Ultrasonic Transducers
Andrew
11
UV Component

• Sterilight - Specs
• 19 Watt Power Consumption
• 40 mJ/cm² of UV
• NSF/EPA/US Public Health Standards

• UV penetrates an organisms cellular structure,
  causing a molecular rearrangement of the DNA
  structure, effectively eliminating bacteria,
  mold, algae, fungi, and protozoa

Andrew
12
UV Test Procedure

• ATP testing of samples to determine the amount of
  living material in each
• Prior to UV
• After UV

Luminometer
Test Reagents
Andrew
13
UV Test Results

• Results
• Adenosine triphosphate
• 93 Reduction ATP
• ATP Life Biological growth

Andrew
14
Chlorinator Analysis

• Using MATLAB FloWorks
• Available head at pier
• Particle passing time from pump to pier
• Necessary run time determined
• 2 minutes 30 seconds
• Stall time dependent on chlorine concentration

Worst Case 1 minute and 41 seconds Average 1
minute and 14 seconds
Tyler
15
Sensor Configuration

• Series vs. parallel sensor connection
• Parallel (Existing)
• Smaller pressure losses
• No significant impact on thickness
• density of biofilm
• ReParallel 9000, ReSeries 9200
• Series
• No significant reduction in sedimentation
• Bore sensor chamber
• input/output
• Replace fittings
• Increase tube diameter

Parallel configuration
Series configuration
Tyler
16
FloWorks Analysis

• 5 Main Configurations
• Original Parallel
• New Parallel
• Series
• New Series
• New Series (Reverse)

Flow Velocity
Pressure Losses
Sedimentation Accumulation
Tyler
17
Final Design Solution

• Order of Components
• Hydrocyclone prior to UV to reduce
  sedimentation
• buildup in UV component
• Chlorinator prior to all to reduce biofouling
• w/in pump and hydrocyclone

Pump
Chlorinator
Hydrocyclone
Sensors
UV
Reduces Biofouling
Reduces Biofouling
Reduces Sedimentation
Tyler
18
Performance of Final Design

• Expected Results
• Hydrocyclone
• 99 Reduction of
• sedimentation
• Yearly maintenance
• UV Performance
• 93 Reduction in biofouling
• Complimentary to chlorine
• Yearly maintenance

Flow in
UV
Hydrocyclone
Flow out
Final housing of UV Hydrocyclone
Leslie
19
Future Recommendations

• Maintain existing chlorination system
• Yearly maintenance
• Replacement of UV bulb
• Clean out hydrocyclone
• Clean out UV chamber
• Monitor UV effects on optical
• measurements
• Close observation at regular
• intervals for 1st year

Preconditioning module integrated into final
system
Leslie
20
Acknowledgements

• Special Thanks to
• Eric Terrill Staff, CORDC
• Jerry Tustaniwskyj
• Michael Latz, SIO
• Geoff Morrison, SeaKeepers International
• Ken Duff, Scripps Machine Shop
• Marshalls Hardware
• Cheese Shop (best sandwiches ever)