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Lake water phosphate reduction with advanced wastewater treatment in watershed, at Lake Hamana, Shizuoka Prefecture, Japan, from 1995 to 2016
- Source :
- Environmental Science and Pollution Research. 27(2):2120-2130
- Publication Year :
- 2019
- Publisher :
- Springer Nature, 2019.
-
Abstract
- Lake Hamana is a semi-enclosed brackish lake amid agricultural and residential land. Monthly vertical profiles of nutrients, total phosphorus (TP), and total nitrogen (TN) at twelve sampling stations in the lake were obtained from 1995 to 2016. Freshwater samples were also obtained from five stations in the river flowing into the lake. Significant decreases were seen in phosphate, TP, and TN concentrations at most lake and all river stations. Decrease in phosphate concentration reflects reduced organic matter and nutrient load into the lake due to increased sewage coverage. Nitrate concentration significantly increased at four stations, whereas ammonium and TN concentrations significantly decreased. This could be due to inefficient nitrification/denitrification of wastewater. At all stations, the nitrogen to phosphate ratio in surface water was higher than 16 and increased significantly. Therefore, phosphate limitation could be strengthened by the decrease in phosphate and increase in nitrate concentrations in the lake.
- Subjects :
- Denitrification
advanced sewage treatment
Nitrogen
Health, Toxicology and Mutagenesis
nutrient profile
010501 environmental sciences
Wastewater
01 natural sciences
Phosphates
Water Purification
chemistry.chemical_compound
Nutrient
Nitrate
Japan
nitrate
parasitic diseases
Environmental Chemistry
Saline Waters
0105 earth and related environmental sciences
phosphate
Brackish water
Phosphorus
General Medicine
Phosphate
Pollution
ammonium
Lakes
chemistry
Environmental chemistry
Environmental science
Nitrification
Surface water
urban
Water Pollutants, Chemical
Environmental Monitoring
Subjects
Details
- Language :
- English
- ISSN :
- 09441344
- Volume :
- 27
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Environmental Science and Pollution Research
- Accession number :
- edsair.doi.dedup.....e217f3a1324da49a8f16c84a95f1dcc6