Liquid purification or separation – With means to add treating material – With distinct reactor tank – trough or compartment
Reexamination Certificate
2005-10-11
2008-12-30
Hruskoci, Peter A. (Department: 1797)
Liquid purification or separation
With means to add treating material
With distinct reactor tank, trough or compartment
C210S202000, C210S211000, C210S213000, C210S216000, C210S383000, C210S396000, C210S488000
Reexamination Certificate
active
07470365
ABSTRACT:
The present invention provides a system for sludge treatment which transfers sludge into a dewatering device while maintaining the sludge density at a predetermined level constant suitable for dewatering the sludge even when the density of the precipitated sludge varies, thus improving the sludge treating efficiency and sludge dewatering efficiency, and reducing the amount of a coagulant to be used. In the system for sludge treatment, a sludge concentration device is installed in a mixing flocculation tank. Thus, the sludge is mixed with the coagulant and flocculated in the mixing flocculation tank to produce flocs and a supernatant, while the supernatant is directly discharged from the mixing flocculation tank. Furthermore, the amount of the supernatant is controlled to maintain the desired density of the flocs to be transferred to the dewatering device. Thus, the dewatering device can be stably operated.
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PCT/KR2004/000719 International Search Report, Jul. 19, 2004.
Ark Co. Ltd.
Graybeal Jackson LLP
Hruskoci Peter A.
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