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Odour control by selective absorption using solubility agents and washing oils
Citation Link: https://doi.org/10.15480/882.727
Other Titles
Geruchsminimierung durch selektive Absorption unter Verwendung selektiver Absorbenzien und Waschölen
Publikationstyp
Doctoral Thesis
Date Issued
2009
Sprache
English
Author(s)
Advisor
Referee
Keil, Frerich
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2009-09-04
TORE-DOI
First published in
Hamburger Berichte zur Siedlungswasserwirtschaft;71
Number in series
71
Aim of this work was to identify alternative absorbents and solubility agents in
aqueous solutions, which improve absorption of odour substances from waste air. In experiments Henry coefficients of chosen odorants in alternative washing liquids were determined. Some oils and aqueous solutions with humic substances were found to have much higher solubility of many gases than water has.
Applicability of humic substances as solubility agents in bioscrubbers were proofed and verified in several series of measurements. Within laboratory tests reduction rates of dimethyl sulphide were found to be between 34 and 50% higher when humic substances were applied compared to conventional bioscrubbers. At on-site tests with a pilot plant of two bioscrubbers, improvement by humic substance was only between 7% and 10%. Whereas, when both bioscrubbers were operated in series the reduction rate of the second step could be increased from 35% to 80% by usage of humic substances.
Washing oils were tested in a laboratory air scrubber with a regeneration by steam stripping as an alternative concept of odour control. Kinetic constants were determined and used for scale-up calculations to compare required scrubber sizes of a conventional bioscrubber, a bioscrubber with humic substances and an oils scrubber. As a result a bioscrubber was proofed to be the most efficient concept of absorptive odour control. In many cases humic substances used as solubility agents improve reduction rates with little supplemental efforts. In contrast the oil scrubber was determined to be the most cost intensive concept towards investigation and operation.
aqueous solutions, which improve absorption of odour substances from waste air. In experiments Henry coefficients of chosen odorants in alternative washing liquids were determined. Some oils and aqueous solutions with humic substances were found to have much higher solubility of many gases than water has.
Applicability of humic substances as solubility agents in bioscrubbers were proofed and verified in several series of measurements. Within laboratory tests reduction rates of dimethyl sulphide were found to be between 34 and 50% higher when humic substances were applied compared to conventional bioscrubbers. At on-site tests with a pilot plant of two bioscrubbers, improvement by humic substance was only between 7% and 10%. Whereas, when both bioscrubbers were operated in series the reduction rate of the second step could be increased from 35% to 80% by usage of humic substances.
Washing oils were tested in a laboratory air scrubber with a regeneration by steam stripping as an alternative concept of odour control. Kinetic constants were determined and used for scale-up calculations to compare required scrubber sizes of a conventional bioscrubber, a bioscrubber with humic substances and an oils scrubber. As a result a bioscrubber was proofed to be the most efficient concept of absorptive odour control. In many cases humic substances used as solubility agents improve reduction rates with little supplemental efforts. In contrast the oil scrubber was determined to be the most cost intensive concept towards investigation and operation.
Subjects
Absorbenzien
Löslichkeitsvermittler
Geruchsstoffe
Abluftwäscher
Huminstoffe
absorbents
solubility agents
waste air
washing liquids
humic substances
DDC Class
660: Technische Chemie
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