METHOD FOR TREATING FLUORINE-CONTAINING WASTEWATER, AND APPARATUS FOR TREATING FLUORINE-CONTAINING WASTEWATER

WIPO Patent Application WO/2014/083716

A1

A method for treating fluorine-containing wastewater according to an embodiment comprises the steps of: bringing the fluorine-containing wastewater into contact with a calcium agent in a reaction vessel to cause the reaction of fluorine in the fluorine-containing wastewater with the calcium agent, thereby producing calcium fluoride in the fluorine-containing wastewater; and subjecting the calcium fluoride to solid/liquid separation in a solid/liquid separation apparatus placed on the downstream side of the reaction vessel to remove the calcium fluoride from the fluorine-containing wastewater, thereby producing primarily-treated water of the fluorine-containing wastewater and a slurry containing the fluoride calcium. The method additionally comprises the steps of: electrodialyzing the primarily-treated water in an electrodialysis apparatus placed on the downstream side of the solid/liquid separation apparatus to concentrate and remove fluorine ions contained in the primarily-treated water, thereby producing finally-treated water of the fluorine-containing wastewater; and washing the solid/liquid separation apparatus with the primarily-treated water.

MATSUSHIRO TAKESHI (JP)
YAMAZAKI ATSUSHI (JP)
FUKAYA TARO (JP)
IDE TAKESHI (JP)
ISHIZUKA MIWA (JP)

PCT/JP2013/002143

June 05, 2014

March 28, 2013

Click for automatic bibliography generation  

TOSHIBA KK (JP)

C02F1/58; B01D61/44; B01D61/52; B01D61/54; C02F1/469

WO2010004925A1

2010-01-14

JP2004249251A	2004-09-09
JP2007014827A	2007-01-25
JP2000301165A	2000-10-31
EP0601614A1	1994-06-15

SAKURA PATENT OFFICE, p. c. (JP)
Patent business corporation cherry tree international patent firm (JP)

View/Download PDF      PDF Help

Previous Patent: CABLE CONNECTING STRUCTURE AND CABLE CONNECTING METHOD

Next Patent: POWER MODULE