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The Effect of Lagoon Effluent on the Oxygen
Budget of a Receiving Stream
MICHAEL J. ATHERTON, EPA Pre-doctoral Fellow
DARRELL L. KING, Associate Professor
Department of Civil Engineering
University of Missouri
Columbia, Missouri
INTRODUCTION
Effluents from facultative waste treatment lagoons characteristically contain
large concentrations of algae which can affect the receiving stream in a variety of
ways. These algae may continue to produce oxygen through photosynthesis but they
also continue to respire. This can lead to large diurnal fluctuations in the dissolved
oxygen concentration of the receiving stream. In addition, the energy-rich, readily
biodegradable algal protoplasm can exert a significant oxygen demand on the stream.
The purpose of this study was to evaluate the net effect of an algal-laden
lagoon effluent on the oxygen budget of a small mid-Missouri receiving stream.
THE STUDY SECTION
This study was conducted on Bear Creek which headwaters in the outlying
portions of Columbia, Missouri and has an average summer flow of about 0.6 cfs. At
the time of this study, Bear Creek received effluent from two municipal sewage
lagoons of 4.8 and 12.5 acres.
The 287 foot section of stream considered in this study centered about 150
yards below the outfall from the large lagoon which was about 500 yards
downstream from the small lagoon outfall. The study section consisted of a 258 foot
long pool which separated two riffles. The volume of water within this section varied
with precipitation but a representative estimate of 15,580 cubic feet was obtained on
July 28, 1968. During the period of this study, from late July to early September,
1968, frequent heavy rains increased the stream discharge such that the average
discharge was about double that recorded the previous summer (1).
THE OXYGEN BUDGET
In order to construct an oxygen budget, it was necessary to determine the
amount of atmospheric reaeration, total community respiration, and gross algal
oxygen production for each hour at several points along the study section.
Series of measurements of dissolved oxygen and temperature were obtained at
hourly intervals for full 24 hour periods from five different sites within the study
section on six occasions during the summer of 1968. Results from these six different
12
Object Description
| Purdue Identification Number | ETRIWC197102 |
| Title | Effect of lagoon effluent on the oxygen budget of a receiving stream |
| Author |
Atherton, Michael L. King, Darrell L. |
| Date of Original | 1971 |
| Conference Title | Proceedings of the 26th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,19214 |
| Extent of Original | p. 12-21 |
| Series | Engineering extension series no. 140 |
| 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 | 2009-06-25 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page 012 |
| 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 | The Effect of Lagoon Effluent on the Oxygen Budget of a Receiving Stream MICHAEL J. ATHERTON, EPA Pre-doctoral Fellow DARRELL L. KING, Associate Professor Department of Civil Engineering University of Missouri Columbia, Missouri INTRODUCTION Effluents from facultative waste treatment lagoons characteristically contain large concentrations of algae which can affect the receiving stream in a variety of ways. These algae may continue to produce oxygen through photosynthesis but they also continue to respire. This can lead to large diurnal fluctuations in the dissolved oxygen concentration of the receiving stream. In addition, the energy-rich, readily biodegradable algal protoplasm can exert a significant oxygen demand on the stream. The purpose of this study was to evaluate the net effect of an algal-laden lagoon effluent on the oxygen budget of a small mid-Missouri receiving stream. THE STUDY SECTION This study was conducted on Bear Creek which headwaters in the outlying portions of Columbia, Missouri and has an average summer flow of about 0.6 cfs. At the time of this study, Bear Creek received effluent from two municipal sewage lagoons of 4.8 and 12.5 acres. The 287 foot section of stream considered in this study centered about 150 yards below the outfall from the large lagoon which was about 500 yards downstream from the small lagoon outfall. The study section consisted of a 258 foot long pool which separated two riffles. The volume of water within this section varied with precipitation but a representative estimate of 15,580 cubic feet was obtained on July 28, 1968. During the period of this study, from late July to early September, 1968, frequent heavy rains increased the stream discharge such that the average discharge was about double that recorded the previous summer (1). THE OXYGEN BUDGET In order to construct an oxygen budget, it was necessary to determine the amount of atmospheric reaeration, total community respiration, and gross algal oxygen production for each hour at several points along the study section. Series of measurements of dissolved oxygen and temperature were obtained at hourly intervals for full 24 hour periods from five different sites within the study section on six occasions during the summer of 1968. Results from these six different 12 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
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