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Chlorine Dioxide in Waste Treatment R. N. ASTON Technical Representative Mathieson Chemical Corporation Cincinnati, Ohio Chlorine dioxide is not new to the industrial waste treatment field inasmuch as it has been in use since 1944. Actually, up until about two years ago its use in the field was confined primarily to the treatment of potable water supplies. While one may say that water is not an industrial waste in the usual sense, the applications pointed the way to the more recent developments. The wastes in many of the water supplies, particularly the phenolic type, could be smelled, tasted and tested. The work in water treatment indicated the power of chlorine dioxide to remove or oxidize phenols in the range of parts per million or even parts per billion. Chlorine dioxide is now in commercial use in several fields of waste treatment for both gaseous and liquid wastes. Operating data are available on the application of chlorite in the treatment of phenolic wastes from several different industries. Plant scale studies are now under way on the treatment of cyanide wastes with chlorite. Chlorine dioxide is being used on a plant scale in the treatment and elimination of obnoxious odors from plants that render animals and fish. A brief review of the method of application of chlorine dioxide will aid in an understanding of its use. Chlorine dioxide is a powerful oxidizing agent and exists normally as a yellow-red gas. It is not sufficiently stable, however, to be shipped or stored as such. It must, therefore, be prepared as needed at the point of application. Technical Sodium Chlorite (NaClOo), a dry, stable chemical available commercially, serves as a most convenient source of supply. The usual method of preparing chlorine dioxide for commercial use is to react a solution of sodium chlorite with a solution of chlorine such as produced by the usual commercial chlorinator found in industrial plants or water purification plants. The chlorite solution is added by means of a chemical proportioning pump to the chlorine solution in a packed glass column known as a chlorine dioxide solution generator. This produces an aqueous solution of chlorine dioxide with or without excess chlorine in solution depending on the ratios of each fed according to the reaction: 2NaC102 + Cl2 -* 2C102 + 2NaCl 148
Object Description
Purdue Identification Number | ETRIWC195214 |
Title | Chlorine dioxide in waste treatment |
Author | Aston, R. N. |
Date of Original | 1952 |
Conference Title | Proceedings of the seventh Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=2072&REC=5 |
Extent of Original | p. 148-155 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2008-11-13 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 148 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Chlorine Dioxide in Waste Treatment R. N. ASTON Technical Representative Mathieson Chemical Corporation Cincinnati, Ohio Chlorine dioxide is not new to the industrial waste treatment field inasmuch as it has been in use since 1944. Actually, up until about two years ago its use in the field was confined primarily to the treatment of potable water supplies. While one may say that water is not an industrial waste in the usual sense, the applications pointed the way to the more recent developments. The wastes in many of the water supplies, particularly the phenolic type, could be smelled, tasted and tested. The work in water treatment indicated the power of chlorine dioxide to remove or oxidize phenols in the range of parts per million or even parts per billion. Chlorine dioxide is now in commercial use in several fields of waste treatment for both gaseous and liquid wastes. Operating data are available on the application of chlorite in the treatment of phenolic wastes from several different industries. Plant scale studies are now under way on the treatment of cyanide wastes with chlorite. Chlorine dioxide is being used on a plant scale in the treatment and elimination of obnoxious odors from plants that render animals and fish. A brief review of the method of application of chlorine dioxide will aid in an understanding of its use. Chlorine dioxide is a powerful oxidizing agent and exists normally as a yellow-red gas. It is not sufficiently stable, however, to be shipped or stored as such. It must, therefore, be prepared as needed at the point of application. Technical Sodium Chlorite (NaClOo), a dry, stable chemical available commercially, serves as a most convenient source of supply. The usual method of preparing chlorine dioxide for commercial use is to react a solution of sodium chlorite with a solution of chlorine such as produced by the usual commercial chlorinator found in industrial plants or water purification plants. The chlorite solution is added by means of a chemical proportioning pump to the chlorine solution in a packed glass column known as a chlorine dioxide solution generator. This produces an aqueous solution of chlorine dioxide with or without excess chlorine in solution depending on the ratios of each fed according to the reaction: 2NaC102 + Cl2 -* 2C102 + 2NaCl 148 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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