Design of water hyacinth ponds for removing algal particles from waste stabilization ponds

In this study it was demonstrated that when water hyacinth ponds (WHPs) are used for polishing the effluent from waste stabilization ponds (WSPs), suspended solids (mostly algal particles) are efficiently separated, which also resulted in the reduction of insoluble forms of COD and nutrients. The hi...

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Bibliographic Details
Published in:Water science and technology 2004-12, Vol.48 (11-12), p.115-123
Main Authors: Kim, Y., Giokas, D.L., Chung, P.-G., Lee, D.-R.
Format: Article
Language:English
Subjects:
Algae
Aquatic plants
Detention time
Dissolved oxygen
Floating plants
Freshwater plants
Nutrients
Ponds
Reduction
Stabilization
Stabilization ponds
Suspended solids
Water hyacinths
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Summary:In this study it was demonstrated that when water hyacinth ponds (WHPs) are used for polishing the effluent from waste stabilization ponds (WSPs), suspended solids (mostly algal particles) are efficiently separated, which also resulted in the reduction of insoluble forms of COD and nutrients. The high pH of the WSPs effluent was easily adjusted to 6-7 as it passed through the WHPs. However, the use of water hyacinth rapidly reduced dissolved oxygen at the first cell to less than three mg/L or very frequently to a level of anaerobic state. Reduction of suspended solids at the WHPs mainly depends on the detention time and pH. An empirical separation model incorporating the detention time and pH dependence was developed.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2004.0818