Waste water and sludge treatment apparatus

Details Waste water and sludge treatment apparatus Waste water and sludge treatment apparatus

2006-04-17

2008-10-07

Barry, Chester T. (Department: 1797)

Liquid purification or separation

Recirculation

C210S195100, C210S196000, C210S512200

Reexamination Certificate

active

07431834

ABSTRACT:
In a system for separating crystals from sludge, or from separated water generated when sludge is subjected to a concentration process or a dewatering process, aspects of both phosphorus removal and phosphorus recovery can be satisfied, MAP having a high degree of purity can be recovered, and stable treatment can be performed such that the MAP recovery rate is high and blockages of a hydrocyclone do not occur. An aspect of the present invention is a crystal separation apparatus for separating crystals from sludge, or from separated water generated when sludge is subjected to a concentration process or a dewatering process, comprising a hydrocyclone for separating the crystals from the sludge or separated water introduced into the hydrocyclone, and a return pipe A for returning the sludge or separated water which flows out from an overflow riser of the hydrocyclone to a sludge or separated water introduction portion of the hydrocyclone.

REFERENCES:
patent: 7153436 (2006-12-01), Bair et al.

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