reducing greenhouse gases through bio-oxidation · • basic incineration technology, voc’s...
TRANSCRIPT
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©2003 Bio Reaction Industries, All Rights Reserved
REDUCING GREENHOUSE GASES THROUGH
BIO-OXIDATION
James T. Boswell, Ph.D. & Tracy Barton, Project Manager
October 2003
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Bio-oxidation is abiological air pollutioncontrol technologythat utilizes bacteria &fungi to biologicallyabsorb and digest vaporphase VOCs and odorouscompounds commonlyfound in industrial andmunicipal applications.
What is Bio-oxidation?What is Bio-oxidation?
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How They Work?How They Work?
Contaminated air streams are pulled into thesystem via induced-draft fans, thecontaminants first encounter bacteria inan aerated sump and inorganic mediawith biofilm growth. The finaltreatment occurs in a compostmedia, where they are capturedand digested by a community ofnaturally-occuring microbes. Thecontaminants are utilized as a foodsource for the microbes and exhaustedinto the atmosphere as small amounts ofcarbon dioxide and water vapor.
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““ConventionalConventional”” Biofilters Biofilters
System Design• Very Large Footprint• Bed Compaction &
Replacement• Limited Surge Loading
Capability/Efficiency• Limited Upper VOC
Concentration Capability(<2,000 ppm)
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BRI Engineered Bio-oxidizersBRI Engineered Bio-oxidizers
Multiple Treatment Stages• Aerated sump to capture and treat water-soluble compounds• Inorganic media for biofilm growth to harbor additional bacteria• Organic compost to capture and digest remaining VOCs
Design and Controls• Common sump for nutrient distribution• Biotrickling filter for conditioning the airstream• Automated controls
Structured Compost Media• Increases effective surface area• Eliminates compaction and channeling• Significantly reduces the size over conventional biofilters
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Footprint ComparisonFootprint Comparison
When youcompare atraditional biofilterto a Bio_Oxidizerit’s like comparinga parking lot to aparking space
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Conventional Biofilter MediaConventional Biofilter Media BRI Patented BRI Patented BioBio••AIRSPHERESAIRSPHERES™™
Bed Compaction
Channeling•Increases surface area
•Prevents Compaction
•Reduces channeling effects
•Ensures even moisture distribution
MEDIA MATTERS!MEDIA MATTERS!
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Sample Dual Vessel SystemSample Dual Vessel System
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System InternalsSystem Internals
• Sprinkler Heads andCross Flow Media
• Bio_AIRSPHERES™
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Alternative TechnologiesAlternative Technologies
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Thermal/Catalytic OxidizationThermal/Catalytic Oxidization
• Basic Incinerationtechnology, VOC’sdestroyed at hightemperatures(>1400° F)
• Generally achieves>95% destructionefficiency.
• Consumes significantquantities of fuel(natural gas).
• Discharges NOx andlarge quantities of CO2.
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Carbon FiltrationCarbon Filtration
• Absorbs VOC’s.• Requires “offsite”
regeneration ofcarbon which isexpensive andgenerates NOx.
• Humidity reducesabsorption
• Not suitable forwater-solublecompounds
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Summary of BRI Bio-oxidizerSummary of BRI Bio-oxidizerAdvancementsAdvancements
• Small Footprint, Compact• Fungal Based Microbial Ecosystem• Surge Loading Capability• Modular, Flexible & Expandable Design• Few Moving Parts• Low O&M - Easy Operation• Easy Installation• Decentralized VOC Treatment
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Bio-Oxidizer for Soil Vapor ExtractionBio-Oxidizer for Soil Vapor Extraction
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GC Analyses of ‘Off-gases’
69,467 ± 123,012 17,240 624,410 23
18,382 ± 21,805 70 104,100 23
51,466 ± 103,182 8,540 520,310 23
MeanStd. DeviationMinMaxN
Total VOC (PPMV)
BTEX (PPMV)
Non-BTEX VOC (PPMV)
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Results from GC Analyses
156.95TOTALS
490750TPH (Gasoline)
35MTBE
7.489.8BTEXMay
370.25TOTALS
7701700TPH (Gasoline)
59.7MTBE
1378.5BTEXApril
396.44TOTALS
7201700TPH (Gasoline)
511MTBE
16100BTEXMarch
Dreppm out (avg.)ppm in (avg.)Contaminant
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NATURAL GAS PROCESSING FACILITYNATURAL GAS PROCESSING FACILITY
Situation:• Solution needed in anticipation of
upcoming regulatory change• Reduce BTEX compounds to below 10
tons/year HAPs• Airflow under 10cfm• VOC loadings in excess of 80,000ppm
Approach:• System installed: 3 biofilters in series with
9 layers of Biomatrix• Total footprint, 4 x 12’
Results:• 94% removal of non-BTEX compounds• 99% removal of BTEX compounds• 95% total VOC removal efficiency
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Vent Gas Analysis SummaryVent Gas Analysis Summary
94.3% average removal of Non-BTEX VOCs
Methane Ethane Propane
i-Butane n-Butane i-Pentanes
n-Pentane i-Hexane n-Hexane
Heptanes+ Iso-Octane
99% average removal of BTEX compounds
Benzene, Toluene, Ethylbenzene, Xylenes
TOTAL VOC removal average = 95.1%
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Glycol Dehydrator Vent Gas - GC Analysis
95.1 %30,590624,410Total VOCs
99.0 %1,020104,100Total BTEX
99.3 %98.2 %
57045000
78,88025,22000
BenzeneTolueneEthylbenzeneXylenes
94.3 %29,570520,310Total - Non BTEX VOCs
100.0 %99.7 %89.4 %100.0 %97.3 %98.1 %94.2 %99.2 %99.1 %97.9 %98.8 %
06028,2700350280110603036050
166,26018,190267,1306,36013,17014,7301,9007,7603,26017,5204,030
MethaneEthanePropanei-Butanen-Butanei-Pentanesn-Pentanei-Hexanen-HexaneHeptanes +Iso-Octane
% RemovalEffluentInfluentCompound (PPMV)
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0
10000
20000
30000
40000
50000
60000
70000
80000
90000
Influent R1 Effluent R2 Effluent R3 Effluent
BTEX Non-BTEX Total VOCs99.0 % BTEX Removal99.6% Benzene Removal
Glycol Dehydrator Vent Gas
PPM
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Other Applications for Bio-OxidizersOther Applications for Bio-Oxidizers
VOC INDUSTRIAL– Paint Manufacturing Facilities– Paint Applicators - Spray Booths– Wood Product Facilities– High Tech – Chip Manufacturing– Die Casting – Oil Mist Emissions
ODOR CONTROL– Pulp & Paper– Wastewater Treatment Facilities– Breweries– Animal Processing/Rendering
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Brown Stock Washer EmissionsBrown Stock Washer Emissions
Situation:System needed to treat a combinedair stream including H2S plus andother organic constituents
Approach:Provided small footprint system toenable installation inside facility
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Removal EfficienciesRemoval Efficiencies Methanol(MeOH) Methanol(MeOH) and Formaldehyde(HCHO) and Formaldehyde(HCHO)
Date MeOH∗
Removal (%)HCHO∗
Removal (%)pH
12/13/2001 99 97 7.4
01/10/2002 94.3 88.7 6.7
02/07/2002 99 99 7.3
02/21/2002 99 97 7.403/14/2002 85.2 99 6.9
04/10/2002 35.7 94.9 6.104/17/2002 60.7 99.7 4.2
05/14/2002 99.9 99.9 7.4
06/04/2002 99.9 99.9 7.1
07/30/2002 99.9 97.5 7.0
08/06/2002
99.9
99.9 7.1
08/20/2002
99.9
N.D. 7.5
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Particleboard FacilityParticleboard FacilityPress Vent EmissionsPress Vent Emissions
Situation: Installation to meet Formaldehyde
& Methanol removal required forupcoming MACT regulations
System Loading: Methanol (12-50ppm)
Formaldehyde (4-20ppm)
Approach: 40,000cfm in 4 vessels to fit
customers available footprint
Results: Met proposed MACT of >90%
removal. Tested bio-oxidizerremoval capability for Total VOCs(>80%) by reducing airflow intosystem.
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Total Hydrocarbon Removal -- Particleboard Press Total Hydrocarbon Removal -- Particleboard Press 20.4 Second Retention Time - 12/17/02
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Verification & SizingVerification & Sizing• Pilot systems available• Slip stream airflows up to 1,000cfm• 30-90 day testing at Customers facility
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SUMMARYSUMMARY
• Smaller Footprint than Conventional Biofilters• Lower Capital Costs• Significantly Lower Energy Requirements• Less maintenance, fewer moving parts• Treats combined air streams of H2S AND VOC’s• No Combustion By-Products (NOx, SOx)• Significantly lower CO2 generation than incineration-type
technologies• Odor Reduction obtainable in <24 hours• Systems designed to achieve desired removal efficiencies• Sustainable Technology
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Microbes can and will do anything:microbes are smarter, wiser andmore energetic thanmicrobiologists, chemists,engineers and others.”Perlmon, D. (1980) Developments inIndustrial Microbiology
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THANK YOU!THANK YOU!
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