Processing method of organic water discharge by membrane separation activated sludge device

A treatment method and activated sludge technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the problem of unstable filtration treatment and insufficient decomposition ability of BOD components And other issues

Inactive Publication Date: 2012-10-17
KURITA WATER INDUSTRIES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In this membrane separation activated sludge treatment method, if the sludge concentration (MLSS) is less than 2000 mg / L, the decomposition ability of the BOD component becomes insufficient, and a large amount of BOD components are adsorbed on the membrane surface of the separation membrane module, which cannot stably Filter

Method used

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  • Processing method of organic water discharge by membrane separation activated sludge device
  • Processing method of organic water discharge by membrane separation activated sludge device
  • Processing method of organic water discharge by membrane separation activated sludge device

Examples

Experimental program
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Embodiment

[0036] Next, examples and comparative examples will be described. The raw water used in the following examples and comparative examples is as follows, and the following aeration tank and membrane separation tank are adopted. figure 1 The device shown is processed.

[0037] [raw water]

[0038] Simulated drainage of liquid crystal manufacturing plants (raw water supplied for the first 30 days, including MEA80mg / L, DMSO40mg / L, and nutrient inorganic salts. BOD concentration 100mg / L.)

[0039] Raw water supply 4m 3 / d

[0040] [Aeration tank and membrane separation tank]

[0041] Aeration tank 2m 3 . It is configured to supply sludge to the membrane separation tank at a predetermined flow rate, and return the sludge overflowing from the membrane separation tank to the aeration tank.

[0042] Membrane separation tank 0.4m 3 . Impregnation of Mitsubishi Rayon (Mitsubishi Rayon) MF membrane (membrane area 6m 2 ), according to the cycle of 7 minutes of filtration / 1 minute o...

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Abstract

The invention aims to provide a processing method of organic water discharge, which can conduct stable operation and maintain high sludge concentration even in terms of water discharge of low molecular and organic compounds in a semiconductor-producing factory. The processing method adopts an aeration tank (1) with organic discharging water flowing in and a membrane separation tank (3) which enables sludge in the aeration tank (1) to circulate while conducting solid-liquid separation through a separation membrane (4). According to the organic load amount of raw water, the circulating amount of sludge to the membrane separation tank (3) is set to be 1.5-10 times of the raw water amount.

Description

technical field [0001] The invention relates to a treatment method for biologically treating organic drainage through an aeration tank and performing solid-liquid separation through a membrane. Background technique [0002] According to the treatment method of organic waste water using a membrane separation activated sludge plant (MBR) comprising an aeration tank into which the organic waste water flows and a membrane separation tank for solid-liquid separation through a membrane while circulating the sludge in the aeration tank ( For example, in Patent Documents 1 and 2), by using a membrane, the water quality of the treated water can be maintained well. In addition, the MLSS concentration in the aeration tank can be maintained high, making high-load treatment possible, and since no sedimentation tank is required, it can be used The device becomes smaller. [0003] In this membrane separation activated sludge treatment method, if the sludge concentration (MLSS) is less tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F1/44
CPCY02W10/10C02F1/44C02F3/12C02F3/14C02F3/22
Inventor 小松和也
Owner KURITA WATER INDUSTRIES LTD
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