נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Some effects of stocking fish in waste treatment ponds
Year:
1975
Source of publication :
Water Research
Authors :
Schroeder, Gerald L.
;
.
Volume :
9
Co-Authors:
Schroeder, G.L., Fish and Aquaculture Research Station, Dor, Hof Hacarmel, Israel
Facilitators :
From page:
591
To page:
593
(
Total pages:
3
)
Abstract:
Oxidation ponds or sewage lagoons often present characteristics of natural water bodies in an extreme state of ecological imbalance. Excess nutrients of the decaying waste give rise to plankton blooms which subsequently die. In such conditions dissolved oxygen concentrations (DO) in the water are often low and the pH depressed. The addition of fish to ponds which twice a week received, per ha, wastes with a 5 day BOD of up to 800 kg (20°C) and 5600 kg solids, reduced plankton and benthic populations, increased the average DO, and raised the pH. All of these changes improve the effectiveness of a waste treatment pond for reducing BOD and removing nutrients from the water. Bacteria concentrations were as much as 15 times lower in treatment ponds stocked with fish as compared with unstocked ponds. Lower bacteria concentrations however reduced the rate of loss of COD in the solids of the waste. © 1975.
Note:
Related Files :
environmental health
Nutrients
Sewage treatment
Water bacteriology
water treatment
Show More
Related Content
More details
DOI :
10.1016/0043-1354(75)90087-1
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28137
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:36
You may also be interested in
Scientific Publication
Some effects of stocking fish in waste treatment ponds
9
Schroeder, G.L., Fish and Aquaculture Research Station, Dor, Hof Hacarmel, Israel
Some effects of stocking fish in waste treatment ponds
Oxidation ponds or sewage lagoons often present characteristics of natural water bodies in an extreme state of ecological imbalance. Excess nutrients of the decaying waste give rise to plankton blooms which subsequently die. In such conditions dissolved oxygen concentrations (DO) in the water are often low and the pH depressed. The addition of fish to ponds which twice a week received, per ha, wastes with a 5 day BOD of up to 800 kg (20°C) and 5600 kg solids, reduced plankton and benthic populations, increased the average DO, and raised the pH. All of these changes improve the effectiveness of a waste treatment pond for reducing BOD and removing nutrients from the water. Bacteria concentrations were as much as 15 times lower in treatment ponds stocked with fish as compared with unstocked ponds. Lower bacteria concentrations however reduced the rate of loss of COD in the solids of the waste. © 1975.
Scientific Publication
You may also be interested in