Title:
水処理方法および水処理システム
Document Type and Number:
Japanese Patent JP6796948
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a water treatment method and system capable of drawing a nitrifying bacteria carrying carrier from a nitrification tank while sufficiently suppressing a decrease in nitrification efficiency.SOLUTION: In a water treatment method, ammonia nitrogen-containing water to be treated is treated to obtain first treated water in a first nitrification tank 10 into which a nitrifying bacteria carrying carrier 200 has been charged in a drawable state, the first treated water is treated to obtain second treated water in a second nitrification tank 20 into which the nitrifying bacteria carrying carrier 200 has been charged, the concentration of ammonia or ammonia nitrogen in the second treated water is measured, and when drawing the nitrifying bacteria carrying carrier 200 from the first nitrification tank, 50 vol% or less of the nitrifying bacteria carrying carrier 200 charged in the first nitrification tank 10 is drawn from the first nitrification tank 10 and at the same time the first nitrification tank 10 is replenished with a carrier not carrying nitrifying bacteria, in a state where the ammonia concentration or the ammonia nitrogen concentration has been kept at or below a preset threshold value for a preset time or longer.SELECTED DRAWING: Figure 1
Inventors:
Shigeki Sawada
Sadahito Nakahara
Sadahito Nakahara
Application Number:
JP2016097182A
Publication Date:
December 09, 2020
Filing Date:
May 13, 2016
Export Citation:
Assignee:
Mitsubishi Chemical Aqua Solutions Co., Ltd.
International Classes:
C02F3/34; B01J39/05; B01J49/06; C02F1/42; C02F3/08; C02F3/10
Domestic Patent References:
| JP2006122865A | ||||
| JP2011212670A | ||||
| JP2003326297A | ||||
| JP9047788A | ||||
| JP49130364A | ||||
| JP51042351A | ||||
| JP50103164A | ||||
| JP2001179251A | ||||
| JP2003190950A | ||||
| JP59039382A |
Attorney, Agent or Firm:
Field Saki Satoshi
Shunsuke Fushimi
Kazunori Onami
Shunsuke Fushimi
Kazunori Onami