The Science of Odour Control Applied at the Edmonton Waste Management Centre
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1 The Science of Odour Control Applied at the Edmonton Waste Management Centre Laura Haupert, Ph.D. R & D Scientist OMI Industries Waste reforum 2014 Co-Conference
2 Edmonton Waste Management Centre Odour Management at the Edmonton Waste Management Centre by Heather Speers (From Waste Management Services) 550 Acres
3 Integrated Processing and Transfer Facility Incoming waste is sorted here (Odour Issues) Organics for composing Materials for recycling Materials for conversion to ethanol Biosolids for compost Waste for landfill
4 Edmonton Composting Facility Produces Compost Biosolids Organics Aeration Bays Odour Control
5 Odour The property or quality of a thing that affects, stimulates, or is perceived by the sense of smell Odours can be a mixture of gas molecules Odours can smell good or bad Hydrogen Sulfide Ammonia Cinnamaldehyde Vanillin Benzene Pyridine Trimethylamine
6 Odour Categories Bases Butylamine Dibutylamine Diphenyl Sulfide Acids Methyl Mercaptan Hydrogen Cyanide Sulfur Dioxide Neutrals Styrene Acetaldehyde Chlorine Pyridine Ammonia Hydrogen Sulfide Benzene Trimethylamine
7 Odour Control Using a Blend of Essential Oils A proprietary blend of essential oils used in a formulation for either water based or oil based applications Essential oils - volatile organic oils present in plants α - pinene β - pinene Linalyl Acetate Citronellal Water based - essential oils, surfactants and water Contains neutral organic compounds and organic buffers ph between 5.5 and 8.5
8 Delivery Systems for Airborne Treatment Atomizing Nozzle Hollow Bladed Fan Vapor Phase System Atomize Odour Control Blend into droplets Water Non Polar Essential Oils
9 How Our Product Works Without Being a Mask Contact Van der Waals interaction Electrostatic charge Positive vs. negative Adsorption binding of molecules to a surface Absorption molecules enter a bulk phase Solubility ability of molecules to dissolve into water Distribution Constant gases in solution want to be in a state of equilibrium. Reactions mostly acid / base
10 How Our Product Works - Adsorption Make Contact Van der Waals interaction Electrostatic charge Adsorption binding of molecules to a surface Surface area Atomization of our product Odours Odour control through adsorption
11 How Our Product Works - Absorption Absorption molecules enter a bulk phase Molecules taken up by the volume not surface Odour under control Affected by the solubility of the molecule
12 How Our Product Works - Solubility Solubility ability of molecules to dissolve into water Our product enhances the solubility of many gases Dr. Wilkinson - Efficiency in removing malodors is proportional (α) to solubility of the malodor SOLUBILITY = [CONC] [TIME] [VEL] [POL] DROPLET SIZE CONC Increase product concentration TIME Increase contact time VEL Increase velocity of droplet POL Changing polarity of droplet DROPLET SIZE Decrease the droplet size
13 How Our Product Works Distribution Constant Distribution Constant gases in solution want to be in a state of equilibrium. Equilibrium between vapour and aqueous phases Our product allows for a large increase in distribution constant between gas molecules in vapour and aqueous phases Polarity, ph and reaction with our product Increase in amount of gas trapped in aqueous layer Increase in odour control
14 How Our Product Works Bases Reactions Our product contains organic acids (RCOOH) that will react with bases ph plays a role Ammonia RCOOH + NH 3 = RCOO - NH 4 + Trimethylamine RCOOH + (CH 3 ) 3 N = RCOO - (CH 3 ) 3 NH +
15 3 rd Party Test with Ammonia Testing Done by Southern Petroleum Lab Ammonia tested with our product using flame photometric detection gas chromatography 103 ppm of Ammonia initially 68 ppm of Ammonia immediately after treatment 38 ppm of Ammonia 15 minutes after treatment
16 How Our Product Works Acids Reactions Acids such as Hydrogen sulfide can react with our product (R=CHCHO) by additon across double bonds H + + HS - + R=CHCHO = (SH)RCH=CHOH H + + HS - + R=CHCHO = (SH)RCH 2 CHO
17 3 rd Party Test with Methyl Mercaptan Testing Done by Southern Petroleum Lab Methyl Mercaptan tested with our product using flame photometric detection gas chromatography 3.20 ppm of Methyl Mercaptan initially <0.1 ppm of Methyl Mercaptan immediately after treatment <0.1 ppm of Methyl Mercaptan 15 minutes after treatment Methyl Mercaptan
18 Our Products Mechanism Mechanisms for Odor Control + Atomized droplet Malodor Adsorption & absorption Malodor no longer detected Enhanced solubility & distribution constant (Kd) Possible reaction with buffer and aqueous solution
19 Our product at the Integrated Processing and Transfer Facility 600 CFM vapor phase unit High pressure blower Sub-micron droplets of our product Dry spray
20 Our Product at the Integrated Processing and Transfer Facility
21 Our Product at the Integrated Processing and Transfer Facility
22 Summary Edmonton Waste Management Centre has odour problems Ecosorb neutralizes odours by up to 5 different mechanisms Adsorption, Absorption, Solubility, Distribution Constant and acid/base reactions Ecosorb effectively removes odours at Edmonton Waste Management Centre
23 References Odour Management at the Edmonton Waste Management Centre by Heather Speers (From Waste Management Services) C. King Lee TDH Fluid System Inc. Ying Zhang, R.W. Hurd, and Donald R. Wilkinson Delaware State University Heather Speers and Lena Aitken Edmonton Waste Management Centre Edmonton Waste Management Centre
24 Questions? Thank You!
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