Title:
安水の活性汚泥処理方法
Document Type and Number:
Japanese Patent JP7073956
Kind Code:
B2
Abstract:
To provide an active sludge treatment method of an aqueous ammonia, capable of reducing COD concentration in an aqueous ammonia which is used in production of coke from a coal containing high amount of a powdered coal as a raw material.SOLUTION: The active sludge treatment method of an aqueous ammonia used in production of coke from a coal containing 5-20 mass% of a coal powder with a size of under 0.03 mm as a raw material includes: a step of reducing oils and tars involved in the aqueous ammonia to 80 ppm or under; and a step of active sludge treatment of an aqueous ammonia whose oil and tar contents have been reduced by using an active sludge treatment tank 22 having a light source 24 arranged in a tank wall 23.SELECTED DRAWING: Figure 1
Inventors:
Akito Sagara
Keiji Matsueda
Keiji Matsueda
Application Number:
JP2018135766A
Publication Date:
May 24, 2022
Filing Date:
July 19, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C02F3/12; C02F1/24; C02F1/38
Domestic Patent References:
| JP2007098353A | ||||
| JP59080392A | ||||
| JP4305294A | ||||
| JP3073908U | ||||
| JP58061176A | ||||
| JP53104602A | ||||
| JP59036526A |
Attorney, Agent or Firm:
Nakamae Fujio
Yoshihiro Kurita
Yohei Kiyoi
Yoshihiro Kurita
Yohei Kiyoi