Relationship of nutrient and residual chlorine concentration in treated wastewater with periphytic algae grown in a stream receiving treated wastewater

The ratio of the amount of treated wastewater to river water is increasing in urban areas due to the spread of sewage systems. Treated wastewater is also sometimes extensively used to create streams and other water environments in urban areas. Rivers, streams and other water environments provide val...

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Bibliographic Details
Published in:Water science and technology 2007, Vol.55 (1-2), p.375-386
Main Authors: Aratani, Y, Tajima, A, Minamiyama, M
Format: Article
Language:English
Subjects:
Algae
Biomass
Chlorine
Chlorine - analysis
Chlorophyceae
Eukaryota - growth & development
Eutrophication
Freshwater
Marine environment
Mineral nutrients
Nutrient concentrations
Nutrients
Phosphates
Receiving
Residual chlorine
River water
Rivers
Sewage
Sewer systems
Streams
Urban areas
Waste Disposal, Fluid
Wastewater
Wastewater treatment
Water Purification
Water quality
Water Supply - analysis
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Summary:The ratio of the amount of treated wastewater to river water is increasing in urban areas due to the spread of sewage systems. Treated wastewater is also sometimes extensively used to create streams and other water environments in urban areas. Rivers, streams and other water environments provide valuable habitats for all kinds of aquatic species, but the relationship between such aquatic species and the quality of treated wastewater they inhabit is not clearly understood. This study was carried out to clarify the effect of the water quality of treated wastewater such as nutrients and residual chlorine on periphytic algae grown in a stream receiving treated wastewater using laboratory-scale experimental channels. The following results were obtained. (1) When the range of phosphate (PO4-P) concentration was 0.04 to 0.09 mg/L, the higher the PO4-P concentration, the higher the biomass of periphytic algae and the more dominant the Chlorophyceae. (2) When the range of total residual chlorine (TRC) concentration was 0.07 to 5.8 mg/L, the higher the TRC concentration, the lower the biomass of periphytic algae. When the range of TRC concentration was 0.93 to 5.8 mg/L, this tendency was more pronounced.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2007.003