Title:
SEWAGE TREATMENT SYSTEM
Document Type and Number:
Japanese Patent JP2015044197
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress discharge of nitrous oxide gas into the atmosphere.SOLUTION: An inflow nitrogen load control device 21 controls the opening degrees of valves 22a-22d, on the basis of ammonia nitrogen load values in an anoxic tank 12 and aerobic tanks 13a-13c, input from load detection parts 19a-19d, so that an ammonia nitrogen load in each of the tanks becomes less than a predetermined value, and supplies raw water to each of the tanks. Consequently, the ammonia nitrogen load values in the aerobic tanks 13a-13c can be maintained less than the predetermined value to suppress discharge of nitrous oxide gas into the atmosphere.
Inventors:
FURUYA YUJI
SUZUKI SHIGEHIRO
HONMA SEIJI
SHIOMI HIROSHI
KONO RINA
SUZUKI SHIGEHIRO
HONMA SEIJI
SHIOMI HIROSHI
KONO RINA
Application Number:
JP2014223287A
Publication Date:
March 12, 2015
Filing Date:
October 31, 2014
Export Citation:
Assignee:
METAWATER CO LTD
TOKYO METROPOLITAN GOV
TOKYO METROPOLITAN GOV
International Classes:
C02F3/34; C02F3/30
Domestic Patent References:
| JP2011092831A | 2011-05-12 | |||
| JP2010099560A | 2010-05-06 | |||
| JP2000246055A | 2000-09-12 | |||
| JPS58104698A | 1983-06-22 | |||
| JPS5814997A | 1983-01-28 | |||
| JP2011092831A | 2011-05-12 | |||
| JP2010099560A | 2010-05-06 | |||
| JP2000246055A | 2000-09-12 | |||
| JPS58104698A | 1983-06-22 | |||
| JPS5814997A | 1983-01-28 |
Foreign References:
| US5820760A | 1998-10-13 | |||
| US5820760A | 1998-10-13 |
Attorney, Agent or Firm:
Hiroaki Sakai
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