Aerobic vs Anaerobic Bioreactor Aerobic vs. Anaerobic Bioreactor Landfill Case Study: the New River Regional Landfill Presented at SWANA’s 6 th Annual Landfill Symposia San Diego CA San Diego, CA June 18-20, 2001 Db RRih t PhD Debra R. Reinhart, PhD Timothy Townsend, PhD
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Aerobic vs Anaerobic BioreactorAerobic vs. Anaerobic Bioreactor Landfill Case Study: the New
River Regional Landfill
Presented at SWANA’s 6th Annual Landfill Symposia
San Diego CASan Diego, CAJune 18-20, 2001
D b R R i h t PhDDebra R. Reinhart, PhDTimothy Townsend, PhD
P t ti O iPresentation Overview
• Brief overview of NRRL bioreactor projectproject
• Flammability issuesC t i• Cost issues
• Moisture balance issues• Waste degradation issues• Process control impactsProcess control impacts
ProjectProject Location
Cell 3Cells 1 & 2
Bioreactor
Bi t C tBioreactor Components
• Leachate Collection System ModificationsModifications
• Leachate/Air InjectionG C ll ti• Gas Collection
• Geomembrane Cap
Top of LandfillCluster Well Sk t hSketch
• Three Wells
• Spacing 3-5 ft
• Maintain 10 ft distancefrom top of sand drainage layer todrainage layer to bottom of the well
fTop of Sand DrainageBlanket
10 ft
Instrumentation and Injection W llWells
CN2CL2
CN2
CO3
CM3
CN4
900
New River Regional Landfill Bioreactor Project
Injection700
800InjectionWells
500
600
CD2
CF3
CC3
CD4CE5
CC5
CD6
CE7
CC7
CD8
300
400
CL2
CJ2
C 3
CH2
CK3
CF2
CI3
CL4
C3WCG3
CJ4
CH4
CK5
CF4
CL6
CI5
CG5
CJ6
CH6
CK7
CF6
CI7
CL8
CG7
CJ8
CH8
CF8
100
200
CN2CO3
CM3
CN4CO5
CM5
CN6CO7
CM7CN8
0 100 200 300 400 500 600 700 800
0
New River Regional LandfillLocation: Union County, Florida
Monitoring WellInjection Well
Bioreactor Landfill BoundaryAccess Road
Legend Injection Wells Location Map Sheet Nº
2/3
File: NR_xy final plot.srf Date: 05/30/01Scale: 1:125Units:English<ft>
New River Regional Landfill Bioreactor Project
900
Instrumentation700
800InstrumentationWells
500
600
MD3 MD4
ME5
MC5
MD6 MD8
MC9
300
400
ML3
MJ3
ML4
MH3
MJ4
MF3
ML5
MK5
MD3
MF4
MI5
MK6
MG5
MI6
ME5
MH6
MK7
MF6
MI7
ML8
MG7
MJ8
ME7
MH8
MF8
MI9
MF9G3W G3E
100
200MO3
MN4
ME3
MO5 MH4
MM6 MM7
MN8
MM9L6WM3W M3A
L7E
0 100 200 300 400 500 600 700 800
0
New River Regional LandfillLocation: Union County, Florida
Monitoring WellInjection Well
Bioreactor Landfill BoundaryAccess Road
Legend Monitoring Wells Location Map Sheet Nº
3/3
File: NR_xy final plot.srf Date: 05/30/01Scale: 1:125Units:English<ft>
New River Regional Landfill Bioreactor Demonstration ProjectCross Section on Injection Cluster Wells C8 (x=600)Cross Section on Injection Cluster Wells C8 (x=600)
210
220
CN8CL8
CJ8 CH8 CF8
190
200
CD8
160
170
180
Elev
atio
n <f
t>
140
15010 ft
120
130
-100 0 100 200 300 400 500 600 700 800 900
Y <ft>
Landfill Surface Well Bottom Safety Zone Bottom Liner
Temperature may be below optimum. Investigate and revise operations as desired. Not a safety hazard.
TemperatureControlDiagram
Optimum conditions. Operate and it h d l d
Diagram
T > 140 FT < 160 F
monitor as scheduled.
T > 160 F T < 170 F
Possible concern. Check gas concentrations. If anaerobic Add leachate If aerobic Reduce air flow rate. Track the rate of temperature increase of this area. If a rate of p1F per day (weekly average) is exceeded, stop air injection and add leachate/water.
Condition of concern Stop air injection Add
T > 170 F
Condition of concern. Stop air injection. Add leachate at permitted amount only, or request that DEP allows more liquid volume injection.
W t D d tiWaste Degradation
• Different pathways– Some compounds are recalcitrant under aerobic
diti d d d d biconditions and degrade under anaerobic conditions and vice versa
• Energy yieldsEnergy yields– Aerobic reactions yield more energy, this can lead
to elevated temperatures under low MCB d t f ti• Byproduct formation– H2S– Methane– Methane