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Processing method of organic wastewater and wastewater processing unit

A technology for organic waste water and waste water treatment, which is applied in the fields of food industry waste water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of large dosage of chemicals, high cost, and insufficient oxygen supply in the treatment tank stirring speed. And other issues

Inactive Publication Date: 2011-07-06
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, the method of using an anti-foaming agent or anti-foaming agent has a problem of extremely high cost due to the large amount of chemical used and the need for additional equipment for supplying the chemical.
[0017] In addition, the method of weakening aeration or reducing the stirring speed of the treatment tank has the problem of insufficient oxygen supply required for biological treatment.

Method used

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  • Processing method of organic wastewater and wastewater processing unit
  • Processing method of organic wastewater and wastewater processing unit
  • Processing method of organic wastewater and wastewater processing unit

Examples

Experimental program
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Effect test

Embodiment

[0123] Specific examples and comparative examples compared thereto will be given below and described in detail.

[0124] [Example]

[0125] use figure 1 The waste water treatment plant carries out the treatment of organic waste water.

[0126] This wastewater treatment device has a first biological treatment tank 1 (capacity 6L), a second biological treatment tank 2 (capacity 6L / section×3 sections=total 18L) and a membrane separation tank 4 (capacity 6L) connected in order of description. constitute.

[0127] As organic wastewater, 30 L / day of skim milk aqueous solution (BOD 500-1500 mg / L) was flowed in, and activated sludge treatment was performed.

[0128] Membrane module 6 (hollow fiber made of PVDF (polyvinylidene fluoride), aperture 0.1 μm) is set in the membrane separation tank 4, and the activated sludge separated from the membrane separation tank 4 passes through a predetermined liquid delivery pump (not shown). The sludge return pipe 7 is returned to the front sta...

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Abstract

The invention provides a processing method of an organic wastewater and a wastewater processing unit. The method uses the wastewater processing unit at least provided with a first biologic treatment trough and a second biologic treatment trough at an upstream side where the organic wastewater flows. The method comprises a first biologic treatment process, that is, aeration treatment in the first biologic treatment trough, and changing organic substance in the organic wastewater into a scattered thalli; a second biologic treatment process, that is, conveying the scattered thalli to the second biologic treatment trough, and then flocculating to obtain sludge with microbe animalcule; a sludge feedback process, evaluating frothing volume in the first biologic treatment trough, when the frothing volume exceeding a preset benchmark value, conveying a part of the sludge obtained in the second biologic treatment process to the first biologic treatment trough. The feedback quantity in the sludge feedback process is controlled according to at least any one of parameters of the frothing volume in the first biologic treatment trough and the frothing volume in each unit time.

Description

technical field [0001] The present invention relates to a method for treating organic waste water (hereinafter referred to as organic waste water) containing organic filthy components by means of activated sludge, and particularly relates to a method capable of preventing the occurrence of microorganisms in its microbial treatment tank at low cost. A method for treating organic wastewater and a wastewater treatment device for adverse effects caused by bubbles. Background technique [0002] The activated sludge method for biological treatment of organic wastewater has the advantages of good water quality and easy maintenance of the device, so it has been widely used in sewage treatment, industrial wastewater treatment, etc. [0003] However, the BOD (Biological Oxygen Demand: Biochemical Oxygen Demand) volume load in the activated sludge process is a low load condition, which is 0.5 to 0.8kgBOD / m 3 / d (day) or so, so there is a problem that it requires a large floor space. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/12C02F1/44C02F103/32
CPCY02W10/10
Inventor 浪间哲夫古田喜丈
Owner ASAHI KASEI KK