odor control technology overview
TRANSCRIPT
Abu Dhabi’s Strategic Tunnel Enhancement Programme: Regional Odour
Extraction System Approach– Ventilation
– Carbon Adsorption
Emissions Prevention Systems
–Truck Loadout Areas: 12 – 20 ACH
– NFPA 820 “Standard for Fire Protection in Wastewater Treatment and Collection Facilities”
– Minimum -0.1-inches WC
– Scavenging to Reduce Corrosion
Absorption & Oxidation
-Oxidation improves mass transfer
concentrations
(acid chemistry)
concentrations
• Disadvantages – Requires observation and
conditions
chemical storage
Skid Mounted
Single Bed
Dual Bed
Radial Flow
• Disadvantages – Quickly used in high H2S
environments
– Safety issues with media
washable carbon
Closed-vessel systems
Packaged Systems
Soaking Hose
–bark and wood chips (bulking agents)
–compost (yard waste, sludge)
–Biorem (Coated)
–Enduro (Clay)
– No chemicals
– Package units available for smaller airflows
– Multiple vendors available
Disadvantages – Space intensive
– media dependent
– Media Replacements
– Upper limit on H2S concentrations they can handle
– Sustained levels over 50 ppm problematic
– Must remain moist
Biotowers
scrubbers
Requires acclimation and seeding
Often use plant water as nutrient source – but may require nutrient addition
Typical 10 to 30 seconds EBRT
Spray
Water
(guaranteed 10 years)
than Biofilters
– Smaller footprint than biofilters
–Elevated stack dispersion
–Multiple vendors available
–No chemical handling/use
be less effective on organic- based odor compounds
–More complex than biofilters
–Leachate is acidic
–Nutrient feed
Activated Sludge Diffusion
process/aeration blowers
– Diffuse into activated sludge basins via fine- bubble or coarse bubble diffusers
– Odors removed via absorption and biological oxidation
Advantages – Effective odor control for a wide range of
compounds
– No additional land use
(95%)
– Matching air flows can require complex controls
Thermal Treatment
compounds – Through combustion
Technology Examples – Incinerators, Flares
– Combustion air source for digester gas engines or boilers
Advantages – Effective odor control for a wide range of compounds
– Effective VOC control
– Equipment complexity
which ionizes O2
– Personnel exposure?
•Ionization
source
disperse through air
Visualization of a buoyant Gaussian air
pollutant dispersion plume
Questions?
– Carbon Adsorption
Emissions Prevention Systems
–Truck Loadout Areas: 12 – 20 ACH
– NFPA 820 “Standard for Fire Protection in Wastewater Treatment and Collection Facilities”
– Minimum -0.1-inches WC
– Scavenging to Reduce Corrosion
Absorption & Oxidation
-Oxidation improves mass transfer
concentrations
(acid chemistry)
concentrations
• Disadvantages – Requires observation and
conditions
chemical storage
Skid Mounted
Single Bed
Dual Bed
Radial Flow
• Disadvantages – Quickly used in high H2S
environments
– Safety issues with media
washable carbon
Closed-vessel systems
Packaged Systems
Soaking Hose
–bark and wood chips (bulking agents)
–compost (yard waste, sludge)
–Biorem (Coated)
–Enduro (Clay)
– No chemicals
– Package units available for smaller airflows
– Multiple vendors available
Disadvantages – Space intensive
– media dependent
– Media Replacements
– Upper limit on H2S concentrations they can handle
– Sustained levels over 50 ppm problematic
– Must remain moist
Biotowers
scrubbers
Requires acclimation and seeding
Often use plant water as nutrient source – but may require nutrient addition
Typical 10 to 30 seconds EBRT
Spray
Water
(guaranteed 10 years)
than Biofilters
– Smaller footprint than biofilters
–Elevated stack dispersion
–Multiple vendors available
–No chemical handling/use
be less effective on organic- based odor compounds
–More complex than biofilters
–Leachate is acidic
–Nutrient feed
Activated Sludge Diffusion
process/aeration blowers
– Diffuse into activated sludge basins via fine- bubble or coarse bubble diffusers
– Odors removed via absorption and biological oxidation
Advantages – Effective odor control for a wide range of
compounds
– No additional land use
(95%)
– Matching air flows can require complex controls
Thermal Treatment
compounds – Through combustion
Technology Examples – Incinerators, Flares
– Combustion air source for digester gas engines or boilers
Advantages – Effective odor control for a wide range of compounds
– Effective VOC control
– Equipment complexity
which ionizes O2
– Personnel exposure?
•Ionization
source
disperse through air
Visualization of a buoyant Gaussian air
pollutant dispersion plume
Questions?