Device and method for recycling sludge after sewage treatment

A sludge circulation and sewage treatment technology, applied in biological sludge treatment, fertilization equipment, invertebrate treatment, etc., can solve the problems of secondary pollution of the atmosphere, high operating costs, large floor space, etc., and achieve the elimination of germs , increase the heating area, accelerate the effect of falling speed

Active Publication Date: 2021-12-24
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's social economy and the improvement of urbanization level, the sludge output of urban sewage plants in my country has increased rapidly. It is estimated that the sludge output (80% moisture content) in my country in 2011 exceeded 30 million tons, and the disposal of sludge should follow the " According to the four principles of reduction, harmlessness, stabilization, and resource utilization, the main methods of sludge disposal at home and abroad include landfill, incineration, composting, and resource utilization, etc. Landfill technology has low treatment costs, but It occupies a large area, and the landfill gas and leachate are large and difficult to deal with
The incineration technology has a significant capacity reduction effect, and the calorific value of the sludge can be utilized, but the operating cost is high, and there is a problem of secondary air pollution

Method used

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  • Device and method for recycling sludge after sewage treatment
  • Device and method for recycling sludge after sewage treatment
  • Device and method for recycling sludge after sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 1 to Figure 7 As shown, a device for recycling sludge after sewage treatment includes a support frame 15 and an earthworm breeding bin fixed above the support frame 15. The earthworm breeding bin includes a bin body 2, a bin cover 22, a lighting assembly and a discharge Assemblies, ventilation holes 3 are evenly arranged on the sides of the warehouse body 2, and the warehouse cover 22 is covered to the top of the warehouse body 2 to provide a cool environment, which is suitable for the growth of earthworms; the lighting assembly includes a light source 4 and a light source for powering the light source 4 A controller 5, the light source 4 is fixed to the upper side of the side wall of the bin body 2;

[0038]The discharge assembly includes a metal screen 10, a vibrating motor 1 for driving the metal screen 10 to swing (the vibrating motor 1 drives the metal screen 10 to swing using the existing technology) and a discharge bottom plate 13. A gap of 10 cm...

Embodiment 2

[0041] It is basically the same as Embodiment 1, except that the two moving rods 6 on one side of the discharge bottom plate 13 are connected by a connecting rod 14 . The light source 4 is a cold light source without temperature, and the intensity of the light source 4 is adjusted by the light source controller 5 . The bin body 2 is made of light-shielding material. Described stirring paddle 18 comprises four uniformly arranged blades, and described blade comprises first segment blade 181 and second segment blade 182, and one end of described first segment blade 181 is connected to the shaft of stirring paddle 18, and the other end is connected to The second section of blade 182, the first section of blade 181 is 25 degrees to the horizontal plane, the distance between the second section of blade 182 and the first section of blade 181 is 130 degrees, and the cross sections of the first section of blade 181 and the second section of blade 182 are diamond-shaped . The height o...

Embodiment 3

[0043] According to implementation 1, a method for treating sludge with a device for recycling sludge after sewage treatment includes the following steps: placing the device in a dark environment when in use;

[0044] Step 1: Preparatory work: Position the moving rod 6 to the upper end of the waist-shaped hole on the side wall of the bin body 2, insert the cylinder 12 into the round hole of the discharge bottom plate 13, and at this time, the bottom of the bin body 2 is sealed;

[0045] Step 2: Add sludge after sewage treatment into the bin body 2, and then add earthworms, the amount of earthworms added is 10g of earthworms per kilogram of sludge, cover the bin cover 22, turn on the light source 4, and use the light source controller 5 Adjust the intensity of the light source 4, and the earthworms enter the sludge to process the sludge, and the treatment time is 15 days;

[0046] Step 3: Turn off the light source 4, pass steam into the discharge bottom plate 13 to heat the dis...

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Abstract

The invention provides a device and method for recycling sludge after sewage treatment. The device includes a support frame and an earthworm breeding bin fixed above the support frame. The earthworm breeding bin includes a bin body, a bin cover, a lighting assembly and a discharge Assemblies, the discharge assembly includes a metal screen, a vibrating motor for driving the metal screen to swing, and a discharge bottom plate. The upper surface of the metal screen is evenly arranged with nail-shaped protrusions, and the lower surface of the metal screen is evenly arranged with cylinders. Round holes for cylinder insertion are uniformly arranged on the discharge bottom plate, a steam channel is arranged in the discharge bottom plate, and a stirring device is provided below the earthworm breeding bin; the present invention utilizes the photophobia and heat-phobia characteristics of earthworms, and uses earthworms to control sludge, treat The heavy metals in the sludge are eliminated, and through the heating of the discharge bottom plate, germs are killed and odors are eliminated. After the earthworms have treated the sludge, they mix the sludge with other available wastes and use them as agricultural fertilizers to achieve sludge resources. recycling, environmental protection and low cost.

Description

technical field [0001] The invention relates to the technical field of sludge utilization, in particular to a device and method for recycling sludge after sewage treatment. Background technique [0002] With the development of my country's social economy and the improvement of urbanization level, the sludge output of urban sewage plants in my country has increased rapidly. It is estimated that the sludge output (80% moisture content) in my country in 2011 exceeded 30 million tons, and the disposal of sludge should follow the " According to the four principles of reduction, harmlessness, stabilization, and resource utilization, the main methods of sludge disposal at home and abroad include landfill, incineration, composting, and resource utilization, etc. Landfill technology has low treatment costs, but It occupies a large area, and the landfill gas and leachate are large and difficult to deal with. The incineration technology has a significant capacity reduction effect, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02A01K67/033C05F15/00
CPCA01K67/0332C02F11/02C05F3/00C05F11/02C05F17/05
Inventor 刘秉涛杨小丽魏明华范振强刘京
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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