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Effects Of Alum On The Quality Of Aquaculture Effluents In Settling Ponds

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Title:Effects Of Alum On The Quality Of Aquaculture Effluents In Settling Ponds
Authors:Rowan, Martha
Gross, Amit
Boyd, Claude E.
Keywords:alum, pollutants, settling ponds
LC Subject Headings:Fish culture--Israel--Periodicals.
Fish culture--Periodicals.
Date Issued:2004
Publisher:Israeli Journal of Aquaculture - BAMIGDEH
Citation:Rowan, M., Gross, A., & Boyd, C.E. (2004). Effects Of Alum On The Quality Of Aquaculture Effluents In Settling Ponds. The Israeli Journal of Aquaculture - Bamidgeh, 56(3), 166-175.
Series:The Israeli Journal of Aquaculture - Bamidgeh
Abstract:The effectiveness of alum (aluminum sulfate) in reducing the concentrations of potential pollu- tants in pond effluents was investigated in catfish production ponds. Application of alum at 50 mg/l to water remaining in ponds immediately after seining for harvest did not generally result in significantly greater removal of nutrients and solids than did settling alone, although removal rates of some variables were initially higher in the alum treated ponds. Within four hours of sein- ing in both alum treated and untreated ponds, there was removal of more than 85% of total sus- pended solids, 75% of total phosphorus, 72% of turbidity, and more than 40% of biochemical oxygen demand and chemical oxygen demand. Concentrations of soluble reactive phosphorus decreased after 48 h, but total ammonia nitrogen was not removed. Alum may be more effective in improving water quality in settling ponds if it is applied after the initial sedimentation has occurred.
Pages/Duration:10 pages
Appears in Collections: IJA Volume 56, Issue 3, 2004

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