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Treatment apparatus for organic wastewater

A treatment device, an organic technology, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of insufficient flow, increased aeration power, and reduced biological activity To reduce the quality of biological metabolites, reduce the frequency of resin regeneration, and improve the quality of treated water

Active Publication Date: 2008-10-01
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Due to the precipitation of metal salts in the sludge, the specific gravity of the sludge increases, thereby increasing the power required for aeration and other stirring
In particular, in a fluidized bed type biological treatment tank with a carrier, the specific gravity of the carrier increases, so the carrier accumulates in the lower part of the tank and cannot flow sufficiently.
[0012] Moreover, the precipitation of metal salts in the diffuser pipes leads to insufficient dissolved oxygen due to the decrease of aeration volume, or increases the aeration power due to the increase of differential pressure.
[0013] Most of the organic coagulants are biologically refractory, and when the organic coagulants flow into the second-stage biological treatment tank, they will adhere to the surface of the carrier, which will hinder oxygen transmission or reduce biological activity

Method used

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  • Treatment apparatus for organic wastewater
  • Treatment apparatus for organic wastewater
  • Treatment apparatus for organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] In the device shown in FIG. 1( a ), factory effluent of the following water quality whose main component is tetramethylammonium hydroxide (TMAH) is used as raw water, and the treated water volume is 2000 L / day. In addition, since the amount of phosphorus was presumed to be insufficient in the biological treatment of this raw water, phosphoric acid was added to raw water so that TOC:P=100:3, and it treated. In addition, potassium oleate was used as a flotation aid.

[0117]

[0118] S-TOC: 328mg / L

[0119] Kj-N: 76mg / L

[0120] PO 4 -P: 0.8mg / L

[0121] Table 1 shows the specifications and processing conditions of the equipment used.

[0122] In addition, Table 2 shows the water quality of each part, and Table 3 shows the specific gravity of the carrier added to the first and second biological treatment reaction tanks.

Embodiment 2

[0124] In the device shown in Fig. 1(b), the same as the treatment in Example 1, the factory effluent was used as raw water and treated with a treatment water volume of 2000 L / day. In addition, since the amount of phosphorus was presumed to be insufficient in the biological treatment of the raw water, phosphoric acid was added to the raw water so that TOC:P=100:3, and the treatment was performed. As a flotation aid, potassium oleate was used in the same manner as in Example 1.

[0125] Table 1 shows the specifications and processing conditions of the equipment used.

[0126] In addition, Table 2 shows the water quality of each part, and Table 3 shows the specific gravity of the carrier added to the first biological treatment reaction tank.

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Abstract

A processing device of an organic drainage of the invention processes the organic drainage biologically in a first biological processing reaction tank 1 and processes a flotation separation for the biological processing water without agglutination in a first flotation tank 2. After processing biologically the biological processing water in the first flotation tank 2 in a second biological processing reaction tank 3, 8, a solid-liquid separation is processed. Even if processing the solid-liquid separation for micro-organisms in the processing water in the first biological processing reaction tank 1 without agglutination, if the flotation separation is adopted, the micro-organisms can be adequately removed and separated. Because of no use of agglutinant, problems that load of the organism in the biological processing reaction tank is added and the agglutinant is separated out are avoided and a device setting area and an aeration amount are reduced.

Description

technical field [0001] The present invention relates to a treatment device for organic waste water containing dissolved organic matter, and more particularly to a treatment device for organic waste water containing dissolved organic matter in a two-stage biological treatment reaction tank. When wastewater is subjected to biological treatment, not only the water quality of the treated water can be maintained and the load of biological treatment can be reduced, but also the installation area of ​​the device can be reduced. Background technique [0002] In the treatment of organic wastewater, biological treatment is generally carried out, specifically, activated sludge process and biofilm process are used. In such biological treatment, in recent years, treated water that has been further highly treated has been required for the purpose of reducing environmental load or saving water by recycling water. [0003] In order to improve the water quality of biologically treated water...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/12
CPCY02A20/212Y02W10/10
Inventor 安池友时山田聪田中伦明
Owner KURITA WATER INDUSTRIES LTD
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