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Sludge treatment device based on electrolysis and pressure filtration technologies and method thereof

A technology for sludge treatment and technology, which is applied in the field of sludge treatment devices based on electrolysis and filter press technology, can solve the problems of long treatment cycle, high operating cost, and large investment, and achieve enhanced biodegradability and reduced sludge volume , the effect of improving the working environment

Inactive Publication Date: 2012-07-25
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems existing in the existing sludge treatment technology, and provide a method that can overcome the high moisture content of the sludge in the existing sludge treatment technology, containing toxic and harmful substances such as pathogenic bacteria and heavy metals, long treatment period, and large investment. Sludge treatment device based on electrolysis and filter press technology to achieve harmless and reduced sludge due to defects such as large floor area, high operating cost, and odor generation

Method used

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  • Sludge treatment device based on electrolysis and pressure filtration technologies and method thereof
  • Sludge treatment device based on electrolysis and pressure filtration technologies and method thereof
  • Sludge treatment device based on electrolysis and pressure filtration technologies and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A 50,000-ton / day sewage treatment plant produces 500 tons of sludge with a moisture content of 99% per day, and its sludge treatment design is as follows:

[0034] (1) Two primary sludge pumps (one for use and one for standby), model: 100WL100-15-7.5 vertical sewage pump, Q=100m3 / h, H=15m;

[0035] (2) Flocculation reaction tank 1: steel concrete tank, specification: 5×5×3m, effective volume 50m 3 , with a designed sludge retention time of 2 hours and a 3 m 3 One ferric chloride dosing device;

[0036] (3) Two secondary sludge pumps (one for use and one for standby), model: 80WL50-25-7.5, vertical sewage pump, Q=50m3 / h, H=25m;

[0037] (4) 7 nano-catalytic electrolysis machines (5 for use and 2 for standby), model: BYDW-I [produced by Boying (Xiamen) Technology Co., Ltd.], the sludge treatment capacity of a single machine is 5 m 3 / h;

[0038] (5) 2 middle pools: steel concrete pool, specification: 10×6×3.5m, effective volume 150m 3 , the design sludge retention ti...

Embodiment 2

[0055] A 10,000-ton / day sewage treatment plant produces 100 tons of sludge with a moisture content of 99% per day. The sludge treatment includes the following steps:

[0056] Step 1, flocculation and sedimentation

[0057] The sludge in the secondary sedimentation tank in the sewage treatment plant enters the flocculation reaction tank 1 through the pipeline and the first-level sludge pump 11, and the ferric chloride solution is added to the flocculation reaction tank 1 through the dosing device 1, and the dosage is 80kg / ton Dry the sludge, stir for 3-5 minutes, and pump it into the electrolysis machine 2 through the secondary sludge pump 21 after the reaction is complete.

[0058] The above ferric chloride is a flocculant. The flocculant can be one or any combination of two or more of aluminum salts, iron salts, polyaluminum, polyiron, organic polymer flocculants or microbial flocculants, the aluminum salt being aluminum sulfate, aluminum chloride or both The combination of...

Embodiment 3

[0068] A 30,000-ton / day sewage treatment plant produces 600 tons of sludge with a moisture content of 98% per day. The sludge treatment includes the following steps:

[0069] Step 1, flocculation and sedimentation

[0070] The sludge in the secondary sedimentation tank in the sewage treatment plant enters the flocculation reaction tank 1 through the pipeline and the first-level sludge pump 11, and the ferric chloride solution is added to the flocculation reaction tank 1 through the dosing device 1, and the dosage is 200kg / ton Dry the sludge, stir for 3-5 minutes, and pump it into the electrolysis machine 2 through the secondary sludge pump 21 after the reaction is complete.

[0071] The above ferric chloride is a flocculant. The flocculant can be one or any combination of two or more of aluminum salts, iron salts, polyaluminum, polyiron, organic polymer flocculants or microbial flocculants, the aluminum salt being aluminum sulfate, aluminum chloride or both The combination o...

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Abstract

The invention relates to a sludge treatment device based on electrolysis and pressure filtration technologies. The sludge treatment device is characterized in that the sludge treatment device is provided with a first-stage sludge pump, a flocculation reaction tank, a second-stage sludge pump, an electrolysis machine, an intermediate tank, a third-stage sludge pump, a sewage pump and a pressure filter, wherein an inlet of the flocculation reaction tank is linked with sludge outlets of the first-stage sludge pump and a secondary sedimentation tank of a sewage treatment plant through pipelines, an outlet of the flocculation reaction tank is linked with the inlet of electrolysis machine via the second-stage sludge pump, the outlet of the electrolysis machine is connected with the inlet of the intermediate tank, one line of the outlet of the intermediate tank is connected with the inlet of the pressure filter via the third-stage sludge pump, the other line of the outlet of the intermediate tank is connected with a water inlet of the secondary sedimentation tank via the sludge pump, and outlet water of the pressure filter is linked with the water inlet of the secondary sedimentation tank through the pipeline. A corresponding sludge treatment method comprises the steps of flocculation, sedimentation, electrolysis, settling separation and pressure filtration. The sludge treatment device and the corresponding sludge treatment method, disclosed by the invention, adopt electrolysis as pretreatment and further have the following prominent effects: (1) inhibiting and killing microorganisms and viruses in sludge; (2) deodorizing; (3) decomposing a large number of organic matters in the sludge; (4) decoloring; and (5) reducing the dosage of chemical agents in the follow-up sludge reduction process and reducing the sludge quantity by 30-45%.

Description

technical field [0001] The invention relates to a sludge treatment device and a method thereof, in particular to a sludge treatment device and a method based on electrolysis and filter press technology. Background technique [0002] With the development of the economy, the amount of wastewater discharge and sewage treatment facilities (sewage treatment plants) are increasing. In the sewage plant, 0.5-2% sludge will be produced along with the sewage treatment, and the sludge treatment and disposal methods have gradually become the focus of attention at home and abroad. According to the data of the Ministry of Housing and Urban-Rural Development, by the end of 2009, the national urban sewage treatment volume reached 28 billion cubic meters per year, and the production of wet sludge (with a moisture content of 80%) exceeded 20 million tons per year. Moreover, in the process of sewage treatment, bacteria and most of the parasitic organisms remain in the sludge, and viruses can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 张世文李丹
Owner BOYING XIAMEN SCI & TECH
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