METHOD AND APPARATUS FOR TREATING WASTE WATER

Japanese Patent JP3667254

B2

PROBLEM TO BE SOLVED: To remove or suppress the generation excessive sludge to the utmost and to perform sludge treatment without occurrence of odor.
SOLUTION: Raw waste water is let to flow into an inflow tank 2, electron acceptor adjusting water 11 for micro-organisms is mixed from an electron acceptor adjusting water storage tank 1 to the inflow tank 2 and the raw waste water is aerated under a condition that the amount of dissolved oxygen is substantially 1 mg/L or less. Subsequently, the aerated treated water is sent to a reaction tank 3 and is aerated under a condition that the amount of dissolved oxygen is substancially 1 mg/L or less. Subsequently, the treated water is treated in such a manner that the sludge is settled and separated in a sedimentation tank 4 and the supernatant water is discharged. Subsequently, the settled sludge is sent to a sludge digesting tank 5 and is aerated under a condition that the amount of dissolved oxygen is substancially 1 mg/L or less. The supernatant water of the aerated water is returned to the electron acceptor adjusting water storage tank 1 as the electron acceptor adjusting water 11.

WO/1986/007617	METHOD AT WATER SUPPLY AND SEWERAGE SYSTEM AND SYSTEM FOR WATER SUPPLY AND SEWERAGE
JP5103796	Wastewater biological treatment accelerator and wastewater biological treatment method using it

Teika Tamiko

JP2001175094A

July 06, 2005

June 11, 2001

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Wakao Electric Co., Ltd.
Teika Tamiko
Kiichi Wakao

C02F3/12; C02F3/34; C02F11/02; (IPC1-7): C02F3/12; C02F3/34; C02F11/02

JP6182377A
JP10323685A
JP4061999A
JP5115897A

安、大道智孝、常田 聡、平田 彰,栄養塩類除去プロセスにおける脱窒性リン蓄積細菌の影響因子と分子生物学的検出,第35回日本水環境学会年会講演集2001,日本,社団法人日本水環境学会,2001年 3月14日,p79,講演番号 1-G-10-4

Shigemi Nishino

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