Bioreactor Protocol | US EPA ARCHIVE DOCUMENTBioreactor Protocol | US EPA ARCHIVE DOCUMENT Author:...
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Transcript of Bioreactor Protocol | US EPA ARCHIVE DOCUMENTBioreactor Protocol | US EPA ARCHIVE DOCUMENT Author:...
Protocol and Interactive Routine for the Design of Subsurface Bi i h MidBioreactors in the Midwest
Ri h d C kRichard CookeNatasha Bell
DiversionStructure
Third Generation Bioreactors
Capacity5’ Soil Backfill
Length/width dependent on contributing area
p yControlStructure
Backfill
SectionSection of perforated tile
Woodchips
Trench bottom at thetile invert level
p
5’ Soil backfill
Top View
5’ section of non-perforated tile
Capacity controlstructure
Diversionstructure
Solid pipePlastic Liner
Perforated pipePerforated pipe
Solid pipe
• Bioreactor design is a complex balance of flow rate and residence time.
Hi i h d d il d• Historic weather data, and soil and drainage system layout is used to
evaluate bioreactor performance within specified levels of uncertainty. p y
• Operational (stop log) settings are incorporated into the design procedure.
Main Interface
MS ControlsMS Controls
http://www.wq.illinois.edu/dg/
Sample Files
Popup Help ScreensPopup Help Screens
Contributing AreagBased on size and slopeBased on size and slope of outlet pipep p
sdA 5.067.2
3110nDc
Ac 311.0
Contributing AreagBased on tile lengths andBased on tile lengths and intersection anglesg
2SIESLA
)cos(8SSLAc
Contributing Areag
Woodchip PropertiesWoodchip Properties
Sizing CriteriagFlow rateFlow rate
Residence time
PerformancePerformance
Design Flow Rateg10‐year, 24 hour drain10 year, 24 hour drain outflow eventoutflow event • Grassed waterwaysGrassed waterways
(NRCS‐412)
• Constructed wetlands (NRCS‐656)
Design Flow RategDRAINMODDRAINMOD Sim lationsSimulations
• Weather• Soils• Drainage System Layout• Drainage System Layout
Midwest Database
NRCS Midwest DWM States
EDF for Daily Flow
Monthly Design Flowsg
Performance Curve
Illinois Performance CurveBIOREACTOR EFFICACY CURVE
Lake Decatur and Lake Bloomington WatershedsLake Decatur and Lake Bloomington Watersheds
Lr = 95 31Ld‐0.36180
90
100
(%)
Lr = 87.29Ld‐0.343
Lr = 95.31LdR² = 0.94
50
60
70
uctio
n Lr (
R² = 0.99
Lr = 95.42Ld‐0.435
R² = 0 4420
30
40
Load
Red
R = 0.44
0
10
0 5 10 15 20
Loading Density Ld ( Acres/100 sq.feet of the bioreactor)2008 2009 2010 2008 2008‐2009 2008‐2010
Cost Analysisy
Length/Width Effectsg /
Length/Width Effectsg /
Manual Optimizationp
Automatic Optimizationp
Incorporating Performance
Report Generation
Report Generation
Future Work: Residence Time
60 ft x 2.5 ft 40 ft x 3.5 ft
80 ft x 3.5 ft
Preliminary Results
Future Work: Nitrate Loads
