JPS5471858A - Method of treating ammonia containing waste water by way of biological denitrification - Google Patents

Method of treating ammonia containing waste water by way of biological denitrification

Info

Publication number
JPS5471858A
JPS5471858A JP13974077A JP13974077A JPS5471858A JP S5471858 A JPS5471858 A JP S5471858A JP 13974077 A JP13974077 A JP 13974077A JP 13974077 A JP13974077 A JP 13974077A JP S5471858 A JPS5471858 A JP S5471858A
Authority
JP
Japan
Prior art keywords
waste water
denitrification
nitrified
nitrification
ammonia
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13974077A
Other languages
Japanese (ja)
Other versions
JPS6015400B2 (en
Inventor
Takayuki Suzuki
Taisuke Toya
Yoshitaka Matsuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Infilco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebara Infilco Co Ltd filed Critical Ebara Infilco Co Ltd
Priority to JP13974077A priority Critical patent/JPS6015400B2/en
Publication of JPS5471858A publication Critical patent/JPS5471858A/en
Publication of JPS6015400B2 publication Critical patent/JPS6015400B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To provide a method of treating ammonia containing waste water by way of biological denitrification, comprising the step of subjecting the waste water to nitrifying treatment such that ammonia is left in waste water, circulating a portion of the nitrified liquied to a first denitrification process, and after completely nitrifying the remaining portion of the nitrified liquid at a second nitrification process, subjecting the same to denitrification treatment at a second denitrification process, whereby it is enabled to lower the running cost of the system.
CONSTITUTION: Waste water 1 to be treated is introduced to a first denitrification process 7 together with sludge 6 restored from settling basin 4 after condensation and separation therein and a portion of nitrified liquid 11 supplied from a first nitrification process 8, so as to denitrify NO2 in the nitrification liquid by BOD components contained waste water 1. Ammonia contained in waste water 1 and the nitrified liquid is passed through the first denitrification process 7 as it is and introduced into a first nitrification process 8, where it is nitrified such that ammonia is left therein at a certain range of concentration (NO2 type nitrification). A portion of nitrified liquid 11 is recirculated to the first denitrification process 7, whereas its remaining portion is introduced to a second nitrification process 9, where residual ammonia is nitrified completely. Finally, at a second denitrification process 10, denitrification of waste water is completed.
COPYRIGHT: (C)1979,JPO&Japio
JP13974077A 1977-11-21 1977-11-21 Biological denitrification method for ammonia-containing wastewater Expired JPS6015400B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13974077A JPS6015400B2 (en) 1977-11-21 1977-11-21 Biological denitrification method for ammonia-containing wastewater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13974077A JPS6015400B2 (en) 1977-11-21 1977-11-21 Biological denitrification method for ammonia-containing wastewater

Publications (2)

Publication Number Publication Date
JPS5471858A true JPS5471858A (en) 1979-06-08
JPS6015400B2 JPS6015400B2 (en) 1985-04-19

Family

ID=15252264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13974077A Expired JPS6015400B2 (en) 1977-11-21 1977-11-21 Biological denitrification method for ammonia-containing wastewater

Country Status (1)

Country Link
JP (1) JPS6015400B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04222378A (en) * 1990-06-21 1992-08-12 Mitsubishi Electric Corp Box body for refrigerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04222378A (en) * 1990-06-21 1992-08-12 Mitsubishi Electric Corp Box body for refrigerator

Also Published As

Publication number Publication date
JPS6015400B2 (en) 1985-04-19

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