Abstract
A bioremediation project was carried out in an open ultra-eutrophic lake, Lake Caohai in 2011 to determine whether large-scale cultivation of water hyacinths could improve water quality. The coverage of water hyacinths reached an area of 4.30 km2 (211.0 kt) which is approximately 50% of lake area by November. After the controlled growth of water hyacinths, the concentrations of TN, NH4+-N, and TP decreased significantly in May and remained relatively stable from June to November. The abundance of DO and the decrease of NH4+-N concentrations can be benefit for fishes and aquatic ecosystems, and the decrease of TP concentrations may contribute to the reduction of phytoplantkton biomass. Assimilation by water hyacinths accounted for 64% of the removed N and 108% of the removed P, with the extra P coming from the sediments. The results demonstrated that large-scale water hyacinths can successfully reduce nitrogen and phosphorus loads in a eutrophic lake.
Original language | English (US) |
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Title of host publication | World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress |
Publisher | American Society of Civil Engineers (ASCE) |
Pages | 251-261 |
Number of pages | 11 |
ISBN (Electronic) | 9780784479858 |
DOIs | |
State | Published - 2016 |
Event | 16th World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management - West Palm Beach, United States Duration: May 22 2016 → May 26 2016 |
Other
Other | 16th World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management |
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Country | United States |
City | West Palm Beach |
Period | 5/22/16 → 5/26/16 |
Keywords
- Bioremediation
- Eutrophication
- Nitrogen
- Phosphorus
- Water hyacinths
ASJC Scopus subject areas
- Environmental Engineering
- Water Science and Technology