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Phosphorus Conservation in a Contact
Stabilization System
ROBERT E. SMITH, Environmental Engineer
Bovay Engineers, Inc.
Spokane, Washington 99202
S.K. BHAGAT, Professor
J.E. ONGERTH, Assistant Professor
Environmental Engineering Department
Washington State University
Pullman, Washington 99163
INTRODUCTION
This study was undertaken to investigate the feasibility of treating phosphorus
deficient wastes by the contact stabilization waste treatment process. The nature of the
contact stabilization process may enable it to treat phosphorus deficient wastes with less
supplemental phosphorus than is normally required by conventional activated sludge
systems and also produce an effluent lower in phosphorus than that produced by
conventional activated sludge systems.
Many industrial wastes are high in carbohydrates and deficient in one or more
nutrients. These wastes are difficult to treat biologically without a supplemental nutrient
source. Rag rope pulping waste, brewery waste, sugar beet waste, and fruit processing waste
may be deficient in both nitrogen and phosphorus, while tannery waste may contain excess
nitrogen but may be deficient in phosphorus. Supplement nitrogen and phosphorus are
normally added as ammonia and soluble phosphorus salts.
LITERATURE REVIEW
The initial rapid uptake of organic matter by activated sludge upon aeration and
mixing has been known since 1868 (1). This original observation has since led to the
development of the contact stabilization system which is a modification of the activated
sludge process.
This process, also known as physical adsorption, biosorption or sludge reaeration, is a
high-rate activated sludge treatment system. It achieves the removal and oxidation of waste
materials by separating the adsorption and absorption phase from the oxidation or
stabilization phase, unlike most activated sludge systems.
Eckenfelder and O'Connor (2) reported on the performance of 12 contact stabilization
processes treating sewage, tomato, fruit, and pulp and paper wastes. Biochemical oxygen
demands (BOD5) ranged from a low of 108 mg/l to a high of 740 mg/l, with BOD removal
666
Object Description
| Purdue Identification Number | ETRIWC1975057 |
| Title | Phosphorus conservation in a contact stabilization system |
| Author |
Smith, Robert E. Bhagat, Surinder K. Ongerth, J. E. |
| Date of Original | 1975 |
| Conference Title | Proceedings of the 30th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,25691 |
| Extent of Original | p. 666-674 |
| 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 | 2009-06-29 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page666 |
| 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 | Phosphorus Conservation in a Contact Stabilization System ROBERT E. SMITH, Environmental Engineer Bovay Engineers, Inc. Spokane, Washington 99202 S.K. BHAGAT, Professor J.E. ONGERTH, Assistant Professor Environmental Engineering Department Washington State University Pullman, Washington 99163 INTRODUCTION This study was undertaken to investigate the feasibility of treating phosphorus deficient wastes by the contact stabilization waste treatment process. The nature of the contact stabilization process may enable it to treat phosphorus deficient wastes with less supplemental phosphorus than is normally required by conventional activated sludge systems and also produce an effluent lower in phosphorus than that produced by conventional activated sludge systems. Many industrial wastes are high in carbohydrates and deficient in one or more nutrients. These wastes are difficult to treat biologically without a supplemental nutrient source. Rag rope pulping waste, brewery waste, sugar beet waste, and fruit processing waste may be deficient in both nitrogen and phosphorus, while tannery waste may contain excess nitrogen but may be deficient in phosphorus. Supplement nitrogen and phosphorus are normally added as ammonia and soluble phosphorus salts. LITERATURE REVIEW The initial rapid uptake of organic matter by activated sludge upon aeration and mixing has been known since 1868 (1). This original observation has since led to the development of the contact stabilization system which is a modification of the activated sludge process. This process, also known as physical adsorption, biosorption or sludge reaeration, is a high-rate activated sludge treatment system. It achieves the removal and oxidation of waste materials by separating the adsorption and absorption phase from the oxidation or stabilization phase, unlike most activated sludge systems. Eckenfelder and O'Connor (2) reported on the performance of 12 contact stabilization processes treating sewage, tomato, fruit, and pulp and paper wastes. Biochemical oxygen demands (BOD5) ranged from a low of 108 mg/l to a high of 740 mg/l, with BOD removal 666 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
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