Ammonia and Bod Removal Model for a Constructed Water Hyacinth Treatment System

R. S. Gangavarapu
L. D. Benefield
A. S. McAnally

DOI: 10.2190/JME0-WB9F-U2BU-M1WN


A pilot scale water hyacinth treatment system was constructed near a small Alabama town to investigate the feasibility of using this type of process as a low cost, easily implementable alternative for upgrading small community wastewater treatment systems in southern states. Design equations have been developed based on a series of multiple regression analyses using experimental data obtained from harvested and non-harvested treatment trains. The best predictive equations for effluent five-day biochemical oxygen demand concentration and effluent ammonia-nitrogen concentration were developed based on wastewater characteristics and operational parameters. These parameters include influent and effluent five-day biochemical oxygen demand concentration, influent and effluent ammonia-nitrogen concentration, hydraulic loading rate, organic loading rate, ammonia loading rate, pH, average water temperature and plant growth rate.

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