AERATED REACTOR APPARATUS AND METHODS

摘要

A reaction tank useful for precipitating struvite from aqueous solutions such as wastewater comprises an aeration system. The aeration system includes air diffusers in the reaction tank. The air diffusers are located at a level below an outlet of the reaction tank. The airflow control mechanism comprises means for automatically controlling the flow of the stripping gas from the diffusers. The airflow control mechanism may be configured to automatically control the flow of stripping gas in response to a signal from a sensor measuring the pH of the aqueous solution the alkalinity of the aqueous solution or the concentration of dissolved carbon dioxide in the aqueous solution.