Biological treatment method and biological treatment device for organic waste water

A biological treatment and organic technology, applied in the direction of sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of not being able to fully improve the sludge settling property and effectively treat the organic matter Time-consuming problems such as drainage and settling processes, etc., to achieve the effects of improving settling performance, reducing equipment, and easy operation

Pending Publication Date: 2016-10-26
KURITA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of Patent Document 1 is difficult to achieve stable granulation, and cannot sufficiently improve the

Method used

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  • Biological treatment method and biological treatment device for organic waste water
  • Biological treatment method and biological treatment device for organic waste water
  • Biological treatment method and biological treatment device for organic waste water

Examples

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[0119] [Example 1]

[0120] use Figure 1a The biological treatment device shown, for COD Cr Biological treatment of raw water with 1250mg / L and BOD800mg / L. And as Figure 1b The second biological treatment tank 2 is filled with a fixed bed carrier as shown. The specifications and processing conditions of the first biological treatment tank 1 and the second biological treatment tank 2 are as follows.

[0121]

[0122] Effective capacity: 60L

[0123] DO: 0.5mg / L

[0124] COD Cr Volume load: 7.5kg-COD Cr / m 3 / day

[0125] HRT: 4 hours

[0126] pH: 7

[0127]

[0128] Effective capacity: 120L (height 800 × width 300 × 500mm)

[0129] DO: 2~3mg / L

[0130] Carrier: Polyurethane foam type fixed bed carrier (560×120×10mm plate shape)

[0131] Carrier filling rate: 0.5%

[0132] HRT: 8 hours

[0133] SRT: 30 days

[0134] Dissolved BOD sludge load: 0.05kg-BOD / kg-MLSS / day

[0135] pH: 6.5

[0136] COD in the whole device Cr Volume load is 2.5kg-COD Cr / m 3 / Day, the HRT in the entire device is 12 hours...

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Abstract

In a batch type activated sludge method, to efficiently perform a treatment by improving sedimentation properties of the sludge. In a biological treatment device provided with a first biological treatment tank and a second biological treatment tank, said biological treatment tanks being disposed in two stages in series, a batch type operation is performed by repeating the following steps (1) to (6): (1) introducing organic waste water into the first biological treatment tank; (2) stopping the introduction, aerating the inside of the first biological treatment tank, and converting organic matters into dispersed bacteria through a biological treatment by bacteria; (3) stopping the aeration and introducing first biologically treated water containing the dispersed bacteria into the second biological treatment tank; (4) stopping the introduction, aerating the inside of the second biological treatment tank, and allowing animalcules to prey the dispersed bacteria; (5) stopping the aeration and sedimenting sludge in the second biological treatment tank; and (6) discharging the supernatant.

Description

technical field [0001] The present invention relates to a biological treatment method and a biological treatment device for organic drainage that can be used for the treatment of organic drainage in a wide range of wastewater concentration represented by domestic drainage, sewage, food mills or pulp mills. In particular, the present invention relates to a biological treatment method and a biological treatment device for organic drainage that can improve treatment efficiency and reduce excess sludge generation without deteriorating the quality of treated water. Background technique [0002] The batch-type activated sludge method is well known as a biological treatment method that can simplify equipment and operation by omitting the settling tank or sludge return pipeline in the subsequent stage of the biological treatment tank. The batch-type activated sludge method is a kind of four continuous processes of inputting raw water, aeration, standing (sedimentation), and discharg...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCC02F3/12Y02W10/10
Inventor 藤岛繁树
Owner KURITA INDUSTRIAL CO LTD
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