Solid-liquid separator

Abstract

A solid-liquid separator comprising: an activated carbon adder adds activated carbon to raw water before flocculating sedimentation, to adsorb suspended matter contained in raw water, a liquid cycloneis adapted to separate activated carbon with suspended matter adsorbed thereon, from raw water containing activated carbon, an inflow line is connected with the liquid cyclone so as to cause raw water containing activated carbon before flocculating sedimentation to flow into the liquid cyclone and swirl therein, an activated carbon discharge line discharges activated carbon spun down out of raw water containing activated carbon in the liquid cyclone, from the liquid cyclone, and a pretreated water discharge line discharges raw water having got rid of activated carbon as pretreated water fromthe liquid cyclone, allowing for a reduced amount of chemicals to be used, with production of a reduced amount of sludge.

Description

technical field [0001] The invention relates to a solid-liquid separation device, which uses activated carbon to separate suspended matter in raw water during the water treatment process of a water purification plant. Background technique [0002] In a water purification plant, water is treated by various methods in accordance with the raw water to be treated. For example, in the presence of odor (2-MIB or geosmin), anionic surfactants, phenols, derived methane and its precursors, low-boiling organic chlorides (trichlorethylene, etc.) or traces of harmful substances (pesticides, etc.) Activated carbon is used for the purpose of adsorbing these substances and the like in the water treatment of ordinary water. [0003] use figure 1 An example of a water treatment system 100 of a water purification plant using activated carbon will be described. Raw water taken from water sources such as rivers is first concentrated in the water intake well 1 near the water source. Afterwar...

AI Technical Summary

Problems solved by technology

[0017] However, in the technology described in Patent Document 1, granular activated carbon is charged in the process before coagulation and sedimentation, so there is a problem that a coagulant is added to the raw water containing granular activated carbon, and chemicals such as coagulants required for coagulation and sedimentation are required. the amount becomes large

Furthermore, in the technology described in Patent Document 1, there is also a problem that granular activated carbon and other floc components contained in the floc settled in the sedimentation tank are discarded, and the amount of generated sludge becomes large, making it difficult to discard.

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