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 languageEnglish (US)
Title of host publicationWorld 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
PublisherAmerican Society of Civil Engineers (ASCE)
Pages251-261
Number of pages11
ISBN (Electronic)9780784479858
DOIs
StatePublished - 2016
Event16th 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 2016May 26 2016

Other

Other16th World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management
CountryUnited States
CityWest Palm Beach
Period5/22/165/26/16

Keywords

  • Bioremediation
  • Eutrophication
  • Nitrogen
  • Phosphorus
  • Water hyacinths

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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  • Cite this

    Zhang, Y., Zhang, Z., Wang, Z., Liu, H., Wen, X., Qin, H., Yan, S., & Rittmann, B. (2016). Bioremediation of Eutrophic Water by the Controlled Cultivation of Water Hyacinths. In 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 (pp. 251-261). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784479858.027