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Coagulation and Air Flotation of Suspended
Solids From An Industrial Bio-Oxidation Pond
JOHN E. CARROW, Group Leader
HERN AN CORTES, Chemical Engineer
U.S. Industrial Chemicals Co.
Deer Park, Texas 77536
INTRODUCTION
U.S. Industrial Chemicals Co. began operation of a new vinyl acetate monomer plant
in April, 1970 at Deer Park, Texas. Principal raw materials are acetic acid, oxygen, and
ethylene.
Since this was the first production of unit of its type, waste treatment system designers
could not be given a good set of waste characteristics. The system was well designed and
flexible from a waste collection standpoint, however, and has been reported on before. (1).
Actual performance of the process resulted in a waste stream with such characteristics
as to require modifications of the waste treatment system. The main unanticipated
characteristics were threefold:
(1) Most of the organic loading was a result of sporadic drips, purges and leaks, and
very little came from continuous process wastewater streams.
(2) The wastewater turned out to be very clear with virtually no oily or solid matter.
Primary treatment, provided in the form of an air flotation unit, performed no
useful function. All the contamination was in solution.
(3) The total organic waste load, although within the design aeration capacity, is
carried by relatively less water than was anticipated and results in a rather
concentrated waste (1,000-3,000 mg organic carbon per liter).
The variability of the waste load required the first major change to the waste processing
system, replacement of a small 10,000-gallon equalization tank with approximately
1,000,000 gallons of holding pond capacity. This volume has proved to be none too large.
About half of this capacity was in place due to the foresight of the system designers, but was
piped up as emergency holding capacity rather than in-line equalization. Figures 1 and 2
illustrate this change.
NUTRIENTS
f Figure 1 — Original flow scheme.
WASTE HOLDING
POND 5LUI
a. ss y I Innim
aeIaTHJIT SECONOam-
higure 2 — Present flow scheme.
C0.0UL.MT3
611
Object Description
| Purdue Identification Number | ETRIWC197352 |
| Title | Coagulation and air flotation of suspended solids from an industrial and bio-oxidation pond |
| Author |
Carrow, John E. Cortes, Hernan |
| Date of Original | 1973 |
| Conference Title | Proceedings of the 28th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,23197 |
| Extent of Original | p. 611-616 |
| Series | Engineering extension series no. 142 |
| 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 | 2009-06-24 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page 611 |
| 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 | Coagulation and Air Flotation of Suspended Solids From An Industrial Bio-Oxidation Pond JOHN E. CARROW, Group Leader HERN AN CORTES, Chemical Engineer U.S. Industrial Chemicals Co. Deer Park, Texas 77536 INTRODUCTION U.S. Industrial Chemicals Co. began operation of a new vinyl acetate monomer plant in April, 1970 at Deer Park, Texas. Principal raw materials are acetic acid, oxygen, and ethylene. Since this was the first production of unit of its type, waste treatment system designers could not be given a good set of waste characteristics. The system was well designed and flexible from a waste collection standpoint, however, and has been reported on before. (1). Actual performance of the process resulted in a waste stream with such characteristics as to require modifications of the waste treatment system. The main unanticipated characteristics were threefold: (1) Most of the organic loading was a result of sporadic drips, purges and leaks, and very little came from continuous process wastewater streams. (2) The wastewater turned out to be very clear with virtually no oily or solid matter. Primary treatment, provided in the form of an air flotation unit, performed no useful function. All the contamination was in solution. (3) The total organic waste load, although within the design aeration capacity, is carried by relatively less water than was anticipated and results in a rather concentrated waste (1,000-3,000 mg organic carbon per liter). The variability of the waste load required the first major change to the waste processing system, replacement of a small 10,000-gallon equalization tank with approximately 1,000,000 gallons of holding pond capacity. This volume has proved to be none too large. About half of this capacity was in place due to the foresight of the system designers, but was piped up as emergency holding capacity rather than in-line equalization. Figures 1 and 2 illustrate this change. NUTRIENTS f Figure 1 — Original flow scheme. WASTE HOLDING POND 5LUI a. ss y I Innim aeIaTHJIT SECONOam- higure 2 — Present flow scheme. C0.0UL.MT3 611 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
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