Helminth attaching biological bed for deweighting city sewage sludge

A technology for sludge reduction and urban sewage, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. Low-level problems, to achieve the effect of strong working ability, reduced impact force, efficient and stable sludge reduction effect

Active Publication Date: 2008-04-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a worm-attached biological bed for urban sewage sludge reduction treatment, to overcome the defects of the prior art, such as small worm attachment, unstable population, low working ability, and low ability to resist water flow impact

Method used

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  • Helminth attaching biological bed for deweighting city sewage sludge
  • Helminth attaching biological bed for deweighting city sewage sludge
  • Helminth attaching biological bed for deweighting city sewage sludge

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The present embodiment will be specifically described below with reference to FIGS. 1 to 3 . This embodiment is composed of a container 8, a plurality of deflectors 7, an aeration device 6 and a plurality of worm attachment plates 9, the front end of the container 8 is provided with an inlet 8-1, and the rear end of the container 8 is provided with an outlet 8-1 2. A plurality of deflectors 7 are distributed sequentially from the inlet 8-1 to the outlet 8-2 in the container 8, and the plurality of deflectors 7 are arranged alternately up and down in order to make the fluid entering the container 8 deflect up and down and flow out, aerating The device 6 is arranged at the bottom of the container 8, and between the upright baffles 7 and between the baffles 7 and the side walls of the container 8 is the flow channel 8-3, and the worm attachment plate 9 is along the flow channel 8-3. Wherein, the length direction of the worm attachment plate 9 is comp...

specific Embodiment approach 2

[0017] Specific Embodiment 2: The present embodiment will be specifically described below with reference to FIG. 1 . The difference between this embodiment and the first embodiment is that it also includes a regulating tank 4, a sludge pump 3, a gate valve 2 and a liquid level controller 5, the liquid level controller 5 is arranged on the inner wall of the container 8, and the sludge pump 3 The outlet of the regulating pool 4 is connected to the outlet of the regulating pool 4, and the outlet of the regulating pool 4 is connected to the inlet 8-1 of the container 8 through the gate valve 2. With such arrangement, the flow and water level in the container 8 can be adjusted. The specific operation method of this embodiment is as follows: according to the sludge load generated by the front-end sewage treatment system, use a sludge pump to transport the remaining sludge mixture discharged from the front-end sewage treatment system to the regulating tank, and alleviate the organic ...

specific Embodiment approach 3

[0020] Specific Embodiment Three: The present embodiment will be specifically described below with reference to FIG. 1 . The difference between this embodiment and Embodiment 1 is that the installation position of the worm attachment plate 9 is located in the middle of the container 8 in the height direction, and in the middle of the flow channel 8-3 in the horizontal direction, which is located in the middle of the flow channel 8-3. The filling ratio inside is 40% to 60%, which not only ensures the normal flow rate of the sludge mixture, but also realizes the full contact between the sludge and the worms.

[0021] Application effect of the present invention:

[0022] Sludge index

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Abstract

A worm attaching type biological bed for sludge decrement treatment of city sewage is disclosed. The invention belongs to the technical field of sludge treatment with biological technology and overcomes the shortcomings of low attaching worm quantity, unstable population, low working capacity and low water-impact resisting ability of the prior art. The bed comprises a container, a plurality of baffles and an aerating device, wherein, the baffles can baffle the water entered the container before flowing out; the spaces among vertically baffles as well as between the baffles and the lateral wall of the container are used as overflowing passages. The bed also comprises a plurality of worm attaching plates, which are arranged in the overflowing passages along the length direction thereof. The worm attaching plates consist of metal lattice screens and filling membranes, wherein, the metal lattice screens are made into wave shapes along the length direction; the filling membranes are elastic panels made by crisscrossing and rolling polypropylene fiber bundles and polyethylene fiber bundles with orifices or clearances left between, and the diameter and the width of the orifices or clearances is 0.1-0.5 mm; the surfaces of the filling membranes have attaching polyethylene fiber bundles or polyethylene cilia.

Description

technical field [0001] The invention belongs to the technical field of using biological technology to treat sludge, in particular to a worm-attached biological bed urban sewage sludge reduction system. Background technique [0002] Sewage sludge, as an inevitable product in the process of sewage treatment, has brought about increasingly serious environmental pollution problems. Municipal domestic sewage is generally treated by the ordinary activated sludge method and the AB method. 48% and 58% of the influent BOD of these two methods will be converted into sludge, and the oxidative decomposition of BOD in the true sense only accounts for 42% and 34%. This determines that the sludge production accounts for about 0.5-1.0% of the total treated water. Therefore, for most wastewater treatment, influent pollutants will be transformed into nature in the form of sewage sludge. [0003] my country's sewage treatment rate has increased from 33.15% in 2000 to 56% at the end of 2006. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/32
CPCY02W10/10
Inventor 田禹左薇卢耀斌
Owner HARBIN INST OF TECH
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