Orica - Products

OdorgardŽ

Process Description

The OdorgardŽ process is marketed in Australia and New Zealand by Orica Watercare under licence from Synetix (formerly ICI Katalco). It offers catalytically enhanced hypochlorite scrubbing in a packed tower and presents a significant advance in the removal of odorous compounds and low level VOC's from effluent gas streams. The catalytic process incorporates a fixed bed transition metal catalyst to generate and hold radical oxygen, the active oxidative species at the catalyst surface. This is in contrast to standard chemical scrubbing techniques which rely on autogenous oxidation. This shift in chemical mechanism overcomes problems traditionally associated with conventional alkaline hypochlorite scrubbing, such as chlorination side reactions and chlorine gas emission, with the added advantage of requiring only a single counter flow tower, thus reducing space and capital requirements.

Applicable Industries Benefits of the Odorgard Process

Sewage Treatment Single stage
Composting Facilities Very high efficiency
Animal Rendering No chlorinated by-products
Animal Feed Lower hypochlorite concentration
Leather and Tanning High odour abatement
Paints/Resins No recalcitrant chlorine odour

Commercial Installations

The first OdorgardŽ unit to be installed in Australia was in Ipswich, Queensland in late 1997. Since the installation of the Odorgard unit, odour complaints have been eliminated. One other unit has been commissioned while two others are under construction in Australia. Click here to see our Odorgard Contractors - http://www.environmental.com.au

There are 40 Odorgard units installed across a dozen industries in the UK, Ireland and Wales. These industries include, paints and resins, sewage treatment, meat rendering, fire fighting foam, pharmaceutical's, animal feed, foundry and spice processing.

Performance of a Commercial Installation

GCMS Data for Sulphides and VOC removal
(STW South of England)

Pollutant	Inlet Concentration (ug/m3)	Outlet Concentration (ug/m3)	Reduction %
Hydrogen Sulphide	97,286	18.1	>99.9
Methyl Mercaptan	45	0.1	99.8
Dimethyl Sulphide	26	nd	>99.9
Carbon Disulphide	35	3.1	91.1
Acetic Acid	150	nd	>99.9
Dimethyl Disulphide	1,730	3.4	99.8
Triethyl Amine	170	24	85.9
Dimethyl Trisulphide	560	nd	>99.9
Limonene	390	nd	>99.9
Dimethyl Tetrasulphide	96	nd	>99.9
Methyl Napthalenes	260	20	92.1
C9-C12 Alkenes	2,170	383	82.4

For more details on this product please review or download the attached Odorgard Ž brochure.