Title:
汚泥の脱水方法および汚泥脱水装置
Document Type and Number:
Japanese Patent JP7130949
Kind Code:
B2
Abstract:
To provide a sludge dewatering method and a sludge dewatering device, which are inexpensive for installation cost and running cost for dewatering.SOLUTION: There is provided a method of dewatering sludge and a sludge dewatering device characterized by heating a digested sludge to over 60°C for 0.5 hours or more and then adding a polymer coagulant for coagulation, and dewatering the coagulated sludge. It is preferable that the polymer coagulant has a hydrophobic group, and the polymer coagulant having the hydrophobic group is a DAM-based polymer coagulant, and a heating temperature is 60 to 80°C, and a heating time is 0.5 to 5 hours. After the digested sludge is heated, it may be coagulated without returning to normal temperature, or may be coagulated after returning to normal temperature.SELECTED DRAWING: Figure 1
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Inventors:
Mayu Umemoto
General Takegawa
Satoshi Takebayashi
General Takegawa
Satoshi Takebayashi
Application Number:
JP2017236144A
Publication Date:
September 06, 2022
Filing Date:
December 08, 2017
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
C02F11/18; B01D21/01; C02F11/147
Domestic Patent References:
| JP5200400A | ||||
| JP55001851A | ||||
| JP2005021839A | ||||
| JP3008497A | ||||
| JP2012135705A | ||||
| JP2010227876A | ||||
| JP2003246909A |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
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