ACEC Environmental Business Conference 9/20/2007 Bruce Koetter, P.E. Webster Environmental Associates, Inc. Louisville, Kentucky Odor Control 101
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ACECEnvironmental Business
Conference9/20/2007
Bruce Koetter, P.E.Webster Environmental Associates, Inc.
Louisville, Kentucky
Odor Control 101
Preliminary Site EvaluationOdor SurveyLaboratory TestingDispersion ModelingPresentation of Results/RecommendationsOwner Review/Select Course of ActionDesign ImprovementsConstruction of ImprovementsStartup and Testing
Odor Control Project Elements
Preliminary Site EvaluationSite VisitDiscussions with OwnerIdentify Location of Off-Site ComplaintsBecome Familiar with Plant ProcessesIdentify Potential Odor SourcesDevelop Testing Plan
Odor SurveyCollect Air Samples for Laboratory AnalysisField Testing Using Handheld InstrumentspH, DO, Sulfides in Liquid Stream
CarbonFilter
Odor Source
Flux Chamber
Vacuum Chamber with Sample Bag
Teflon Pump
Tedlar Bag
Set Flow at 5 L/min
2.5 L/min
Teflon Pump
Ambient Air
Odor Panel TestingOdor Detectability/Dilutions to Threshold (D/T)Odor Recognition ThresholdOdor IntensityHedonic ToneOdor Character
Odorous Compound Identification
Reduced Sulfur Compound Analysis (GC/FPD)Volatile Organic Compound Analysis (GC/MS)Hydrogen Sulfide (Field Instrument)Ammonia (Gas Detection Tubes)
Odor Dispersion ModelingComputer program to predict what impact a group of odor sources will have in the surrounding area
Same program used by EPA to predict downwind pollutant concentrations
Inputs include meteorological data, odor emission rates, odor source locations and characteristics, terrain data
Outputs include resulting peak odor concentration (DT) and odor frequencies in area surrounding the odor sources
Presentation of Results/RecommendationsPresent Test ResultsDiscuss Odor Control AlternativesPresent RecommendationsProvide Cost Estimates
Owner Selects Course of Action
Control Considers Level of Control Required and Associated CostsSelects Course of ActionIdentifies Funding Source Selects Design Engineer
Odor Control AlternativesCovers/EnclosuresChemical ScrubbingCarbon AdsorptionActivated Sludge DiffusionBiofiltrationBioscrubbingThermal OxidationChemical AdditionOxygen Injection
Floating Lagoon Cover
Floating Lagoon Cover with Duct
Dome Tank Cover
Effluent Weir Covers
SEPTAGE ENCLOSURE PICTURE
SEPTAGE SCREEN ENCLOSURE
Wet Scrubbers
Chemical Scrubber
Carbon Adsorber
Carbon Adsorbers
AER ATIO N BASIN S
BLO W ER B UILD IN G
AER ATIO NBLO W ER S
AIR FILTER
4,800 C FM EXH AU ST FAN
4,800 C FM EXH AUST FAN
AERATIO N BASIN S 7-12
AER ATIO N BASIN S 1-6
IN FLU ENT C HAN NELS AN D FLU M E
FIGURE 2SCHEMATIC DIAGRAM OF ODOR CONTROL SYSTEM
FOR PRIM ARY CLARIFIERSActivated Sludge Diffusion
EFFLUENT WEIR COVERS
AIR FILTER
Custom-Built Biofilter
Pre-Manufactured Biofilter
Bioscrubbers
Thermal Oxidizers
Chemical Addition
Summarize:Must Identify/Rank Sources of OdorDetermine Compounds in OdorDevelop Odor Control AlternativesModel to Evaluate Impact on CommunityEvaluate Control Alternatives and CostsDesign and Construct
Questions?