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1. (WO2017154780) WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT SYSTEM

Pub. No.:    WO/2017/154780    International Application No.:    PCT/JP2017/008530
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: C02F 1/52
B01D 21/01
B03C 1/00
B03C 1/14
B03C 1/247
C02F 1/32
C02F 1/50
C02F 1/76
C02F 1/78
Applicants: FUJI ELECTRIC CO., LTD.
富士電機株式会社
UTSUNOMIYA UNIVERSITY
国立大学法人宇都宮大学
Inventors: HANAI, Yosuke
花井 洋輔
NAKADA, Eiju
中田 栄寿
SAKAI, Yasuzo
酒井 保藏
Title: WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT SYSTEM
Abstract:
To provide a wastewater treatment method and a wastewater treatment system for efficiently treating scrubber wastewater and ballast wastewater at the same time without providing a plurality of treatment facilities. Provided are: a wastewater treatment method including a mixing step for mixing ballast wastewater into scrubber wastewater that is obtained by bringing an exhaust gas and a scrubber washing liquid into contact with each other in a scrubber 10 such that the suspended solids concentration or the turbidity of the resulting mixture is fixed, a treatment step for adding a magnetic powder to the mixed wastewater, and a separation step for magnetically separating magnetic floc obtained in the treatment step; and a wastewater treatment system provided with a mixing device 3 for mixing ballast wastewater into scrubber wastewater that is obtained by bringing an exhaust gas and a scrubber washing liquid into contact with each other in a scrubber such that the suspended solids concentration of the resulting mixture is fixed, a magnetic powder addition device 4 for adding a magnetic powder to the mixed wastewater obtained using the mixing device, and a magnetic separation device 5 for magnetically separating magnetic floc obtained using the magnetic powder addition device.