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Sludge dewatering method

A sludge dewatering and sludge technology, applied in water/sludge/sewage treatment, sludge treatment, oxidation treatment of sludge, etc., can solve the problem of low dehydration efficiency

Pending Publication Date: 2022-01-07
深圳市中金岭南有色金属股份有限公司凡口铅锌矿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sludge dehydration method, aiming to solve the technical problem that the dehydration efficiency is not high when the existing zero-valent iron combined oxidant is used for sludge dehydration

Method used

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  • Sludge dewatering method

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Effect test

Embodiment 1

[0046] This embodiment provides a sludge dehydration method, the steps are as follows:

[0047] (11) Mix the nano-raw zero-coastal iron with 0.05 m of dilute sulfuric acid solution was mixed at a solid-liquid ratio of 1: 9, and treated at 60 ° C for 10 min. After filtering, the obtained solid was vacuum freeze drying 24h at -60 ° C. , Get the modified zero-valence iron;

[0048] (12) The moisture content of 96% was added to the concentrated sludge of 1 mg / g of sludge, and 0.4 mg / g sludge dry weight, mixed, mixed, stirred at 100 rpm for 5 min;

[0049] (13) 10 min was filled with 5 MPa ultra-high pressure, resulting in a water content of 45%.

Embodiment 2

[0051] This embodiment provides a sludge dehydration method, the steps are as follows:

[0052] (21) Mix the nano-raw zero-coil iron and 0.05 m dilute sulfuric acid solution was mixed according to the solid-liquid ratio of 1: 9, and treated at 60 ° C for 10 min. After filtration, the obtained solid was vacuum freeze drying 24h at -60 ° C. , Get the modified zero-valence iron;

[0053] (22) EtOAc EtOAc EtOAc EtOAc (EtOAc)

[0054] (23) 10min was filled with 4 MPa ultra-high pressure, resulting in a water content of 47%.

Embodiment 3

[0056] This embodiment provides a sludge dehydration method, the steps are as follows:

[0057] (31) Mix the nano-raw zizici iron and 0.05 m dilute sulfuric acid solution was mixed according to the solid - liquid ratio of 1: 9, and treated at 60 ° C for 10 min, filtered, and the obtained solid was vacuum freeze drying 24h at -60 ° C. , Get the modified zero-valence iron;

[0058] (32) EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc EtOAc.

[0059] (33) was filled with 5 MPa ultra-high pressure filtration, resulting in a water content of 42%.

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Abstract

The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge dewatering method. The original zero-valent iron and the acid solution are mixed and heated, so that the dehydration performance of the sludge can be improved, the sludge dehydration efficiency of the zero-valent iron and the oxidant can be improved, and deep dehydration of the sludge can be realized.

Description

Technical field [0001] The present invention belongs to the field of sludge treatment, and specific relates to a sludge dehydration method. Background technique [0002] Sludge dewater refers to a sludge treatment method that converts the fluid, concentrated sludge removal moisture, converts into a semi-solid or solid mud piece. Due to the characteristics of moisture and sludge particles, the mechanical method is used to remove the mechanical method, which can only be obtained by 20-30% of the solid sludge, which still has fluidity, difficulty, and cost. [0003] The use of zero-coil combined oxidants for sludge dehydration is one of the new methods, which is conducive to destroying the structure of the sludge, thereby achieving the effect of dehydration. However, the dehydration efficiency of this method remains to be improved. Inventive content [0004] It is an object of the present invention to provide a sludge dehydration method, which is intended to solve the technical pro...

Claims

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Application Information

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IPC IPC(8): C02F11/143C02F11/06
CPCC02F11/143C02F11/06C02F2305/026
Inventor 欧阳仕元陈卫东刘威王俊欧阳钰丰张幼权车维维刘粱金
Owner 深圳市中金岭南有色金属股份有限公司凡口铅锌矿
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