Patent ID: 6830689
Filing Date: 2004-12-14
Classification: C02F,Y02W,Y10S

Abstract:
A multi-phase process for the removal of phosphorus from a wastewater influent stream in a triple basin wastewater treatment facility having first, second and third basins wherein during the course of the multi-phase process a settling phase is carried out in at least two of the three basins, the process comprising:a. during the multi-phase process, directing the wastewater influent stream into each of the three basins during three different phases of the process to form mixed liquor; b. during the multi-phase process, maintaining at least two of the three basins under anaerobic conditions, one basin being maintained under anaerobic conditions during one phase and another basin being maintained under anaerobic conditions during another phase; c. maintaining at least one of the three basins under aerobic conditions during selected phases of the process; d. during each of the phases of the process, maintaining at least one of the basins in a settling mode, and wherein during the course of the multi-phase process at least two of the three basins are used for settling; and e. wherein maintaining the basins under anaerobic conditions give rise to the growth of phosphorus storing microorganisms and wherein the phosphorus storage microorganisms take up phosphorus in the basins maintained under aerobic conditions.