on-line sorting technology for cca-treated wood. funding received from sarasota county through the...
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On-line Sorting Technology for CCA-Treated Wood
Funding Received from
Sarasota County
through the Florida Department of Environmental Protection
Innovative Recycling Grants Program
Objective
Construct and Operate an On-Line System for Sorting Treated From Untreated Wood
Background
Research conducted found CCA-treated wood in C&D waste piles
6% in 1996 (12 C&D facilities) 9 to 30% in 1999 (3 C&D facilities)
Background
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.619
80
1982
1984
1986
1988
1990
1992
1994
1996
1998
bill
ion
cu
bic
fee
t
Untreated
Treated
(From SFPA)
U.S. Statistics for Southern Pine Production
Conceptual Design10’
7’ 3’ 4’ 16’
C o ntro lRo o m
C lo se dIn
Wo o dPile
C o nve yo rDe te c to r
30’
7’
3’
4’
2’
14’
5’ 18’40’
Inp ut Wo o dSto ra g e
Pile
Tre a te dPile
Untre a te dPile
De te c to rC o nve yo rWo o d Inp ut
Untre a te d Wo o d
C o ntro l Ro o m
Wind o w
30’
Conceptual Design (con’d)Inle t C o nve yo r
De
tec
tor
Wo o d Sa m p le
Exit C o nve yo r
To Untre a te d Pile
Initia lly Se p a ra tio n He re WillBe Do ne M a nua lly
A b uzze r will so und o r a lig ht will shine whe nC C A is d e te c te d
Tasks
Task 1: Obtain Permit and Construct Shelter Task 2: Design and Construct Conveyor Task 3: Lab Test and Develop Detector
(Laser, LIBS vs X-ray, XRF) Task 4: Install and Field Test Conveyor and
Detector Task 5: Operate Sorting System and Document
Performance
Overall Timeline
Description 2000 2001
M A M J J A S O N D J F M A M J J A S
Task 1: Obtain Permit and ConstructShelter
X
Task 2: Design and Construct Conveyor X
Task 3: Lab Test & Develop Detector X X
Task 4: Install and Field Test Conveyorand Detector
X
Task 5: Operate Sorting System andDocument Performance
X
Submit Environ. Certification and Scopeof Services
X
Progress Reports X X X X
Final Report X
Task 1:Obtain Permit and Construct
Shelter
Outline
Specifications and location of shelter Construction process
Shelter construction contractors Project management
Project schedule
Shelter Description
Metal fabricated building 30 by 40 feet, 15 foot eave height Portal frame with open sides, 1:12 sloped
roof Engineered concrete slab
Approximate Size and Roof Line
Portal Frame
Open Sides and Height
Site Layout
Parking
Office Trailer
Shelter
Bin
Wood In
Wood Out
Proposed Parking
Machine Shop
C&D Materials Processing Area
C&D Material Storage Bins
Entrance
Shelter Location
Construction Process
Metal fabricator - shelter design County engineer - concrete design
Slab Anchor bolts
Electric - separate subcontractor
Anchor Bolt Detail
Available Electric
Shelter Contractor Quotes
Uni-Built, Tampa, FL Dura-Steel, Vernon, FL Trident, Sarasota, FL Ranged $9,000 - $17,000
Project Management
Review plans and permit documents Coordinate inspection schedule of
foundations, structural steel and electrical system
Review work in-place prior to scheduled inspection by Building Department
Prepare written summary of field inspections
Review and Concrete/Electrical
Design
Building ContractorDevelops Design
Drawing
2 Wk
2 Wk
5 Wks
Permit Review
1 Wk PO/Contract Finalized
6 Wks
Fabrication and Delivery
Concrete Slab
Erect BuildingInstall ElectricSchedule and Timeline
July
28
August
4 21
September
1 15
3 Wks
October
1 12 27
Task 2:Design and Construct Conveyor
Conveyor (Task 2)
Preliminary Quotes American Conveyor, Miami, FL ** Powerscreen, Lakeland, FL
Conveyor (Task 2)
Ta b le Ro lle r C o nve yo r Be lt C o nve yo rInc line d
Be lt C o nve yo r
Ro ll-o ff
12 ’
305’ 10’ 15’
3 ’
O
XRF De te c to r
La se rC o nve yo r, 5’ wid e
Most Recent Design
Conveyor (Task 2)
5’
10’
15’5’
10’
30’
40’
Inc o m ingWo o d
C C A-Tre a te dWo o d
Inc
line
Co
nve
yor
O the r Wo o dTyp e s
Ro ll-o ff
Co
ntro
l Ro
om
Task 3:Lab Test and Develop Detector
LIBS vs XRF
Funds will be used for LIBS Research with XRF will continue if
equipment “borrowing” arrangement can be made
Laser-induced Breakdown Spectroscopy (LIBS)
Pulsedlaser
Laser-inducedplasma
Atomicemissioncollection
Spectrometer Detector
Wavelength (nm)
Inte
nsity
205 210 215 220 225 230 235 240 245
Cd
Cd
Cd
Be
Line intensity providesspecies concentration
Line position providesspecies identification
Fiberoptic
LIBS Spectrum of CCA-treated Wood
0
2000
4000
6000
8000
10000
12000
14000
410 415 420 425 430 435 440
Em
issio
n I
nte
nsity
Wavelength (nm)
Calcium(422.67)
Chromium425.54427.48428.97
Weathered
LIBS-based Sorting
0
10
20
30
40
50
60
0 1 2 3 4 5 6 7
LIB
S C
hro
miu
m S
ign
al
Wood Sample
CCA-treated Wood
Untreated Wood
Sample Configuration of LIBS Probe
Spectrometer/Detector
Collection Optics Assembly
Plasma
Nd:YAGLaser
To LaptopComputer
WoodSample
Field-deployable Laser: Big Sky Laser
Compact Spectrometer: Ocean Optics
On-line Sorting Technologies
Custom LIBS Commercial XRF(Asoma)
Custom XRF
Cost $36K $20 to $30K $100K
Detection As, Cr, Cu As, Cr, Cu As, Cr, Cu
Analysis time 3 ms @ 10 Hz 50 to 100 s 100 to 500 ms
Spatial resolution(1 ft/sec)
Point1.25" samples
Start/stop mode Continuous2.5" to 12" samples
Standoff distance(Detector-to-wood)
Variable10-12" window
FixedNear contact
~FixedClose proximity
Other issues Laser beam X-ray source X-ray source
Maintenance $400 flashlamp~35 weeks
- - X-ray tube
XRF
ASOMA ----> Now Spectro Contact Harold Soisson Model 400
XRF
Co XRF ----> Distributors of EDAX Contact Steve Cox Model, CT-2000
Note: As detection limit 5 mg/kg
Questions?
More information at:http://www.eng.miami.edu/~hmsolo/
sarasota/index_sara.htm
Link from: www.ccaresearch.org
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