Method and device of processing excess sludge

A technology for excess sludge and treatment methods, applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high-priced ozone generators and expensive treatment equipment, and achieve the goal of simple equipment Effect

Inactive Publication Date: 2007-10-03
株式会社阿卡迈托
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In addition, since an expensive ozone generator is required to supply ozone, there is also a problem that the processing equipment is expensive

Method used

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  • Method and device of processing excess sludge
  • Method and device of processing excess sludge
  • Method and device of processing excess sludge

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Embodiment Construction

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0026] FIG. 1 is a system diagram showing an embodiment of an excess sludge treatment apparatus of the present invention.

[0027] The excess sludge treatment apparatus in FIG. 1 includes an activated sludge tank 1 , a sedimentation tank 2 , and an excess sludge tank 3 , and solubilizes and circulates excess sludge extracted from the sedimentation tank 2 .

[0028] In this activated sludge treatment facility, raw water (organic drainage) is treated with activated sludge in the activated sludge tank 1, solid-liquid is separated in the sedimentation tank 2, and the separated liquid is discharged out of the system as treated wastewater. On the other hand, in order to adjust the sludge concentration of the activated sludge tank 1 to an appropriate concentration of, for example, 2000 to 5000 mg / L, a part of the separated sludge is returned to the activated sludge t...

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Abstract

In an activated sludge treatment of organic waste water, excess sludge from the activated sludge aeration vessel is processed with hypochlorous acid in place of ozone without set up of aeration vessels and blowers to improve volume reduction cost of sludge without deterioration of water quality. The hypochlorous acid process is carried out by using an acidulous sodium hypochlorite aqueous solution which is prepared by mixing sodium hypochlorite aqueous solution with a dilute hydrochloric acid and diluting the resulting mixture with water of available chlorine concentration at a pH zone of more than 4 to less than 7.

Description

technical field [0001] The invention relates to a circulating excess sludge treatment system for continuously treating excess sludge, in particular to the process of continuously extracting excess sludge generated in an active aeration tank in the activated sludge treatment of organic drainage and treating it. A recycling type excess sludge treatment method and equipment thereof returned to an activated sludge tank. Background technique [0002] In the activated sludge aeration tank of the activated sludge treatment equipment with organic drainage, a large amount of excess sludge will be produced. Traditionally, after dewatering the generated excess sludge, the dewatered sludge is discarded at a disposal site or incinerated. However, due to problems such as insufficient treatment plants and high treatment costs, it is necessary to develop technologies for reducing the volume of excess sludge. [0003] Recently, a volume reduction system for excess sludge has been proposed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 立川二男立川浩史立川英夫
Owner 株式会社阿卡迈托
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