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A method for preparing porous micro-electrolytic particles using iron carbon or Fenton sludge in wastewater treatment process

An iron-carbon micro-electrolysis and wastewater treatment technology, which is applied in water/sewage treatment equipment, water/sewage treatment, adsorbed water/sewage treatment, etc. Specific surface area, the effect of improving the reaction efficiency

Active Publication Date: 2021-02-19
上海明奥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, both the iron-carbon micro-electrolysis process and the Fenton process have the problem of producing a large amount of iron-containing sludge. These sludges must be treated harmlessly, otherwise they will cause pollution and damage to the environment, and the disposal of these sludges is difficult. Big, demanding, and expensive, which greatly increases the cost of enterprise sewage treatment, which has also become a common pain point in enterprise sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031]In the preparation method of the porous micro-electrolytic particles, the mixing and granulation methods are divided into wet granulation and dry granulation. Among them, wet granulation is to mix iron-containing sludge with one or more of lignin, lignosulfonate, and modified bamboo wood powder, and then add an appropriate amount of water to make the water content of the mixed powder reach 50% to 80%, and then use wet granulation equipment such as drum granulator, swing granulator, rotary granulator, disc granulator, high-speed mixing granulator to produce water-containing granules with a diameter of 3-20mm, and then Drying yields granules of suitable strength. And dry granulation is to mix iron-containing sludge with one or more of lignin, lignosulfonate, and modified bamboo wood powder, and ensure that the moisture content of the mixed powder reaches below 30% by pre-drying. Then use equipment such as a tablet press and a double-roller to directly compress to obtain g...

Embodiment 1

[0035] Preparation of Example 1 Porous Micro-electrolytic Particles

[0036] Mix the iron-containing sludge and lignin produced in the iron-carbon micro-electrolysis process or the Fenton process at a mass ratio of 75:25, add an appropriate amount of water to make the water content of the mixture reach 80%, and use wet granulation equipment to make the mixture The water-containing particles with a diameter of 3-20mm are then dried at 105°C, and the dried particles are sintered at a constant temperature of 1000°C for 2 hours under the condition of nitrogen protection and oxygen barrier, and then naturally cooled to room temperature and taken out to prepare porous micro-electrolytic particles. After testing, its specific surface area is 50m 2 / g, the iron content is 50%.

Embodiment 2

[0037] Preparation of Example 2 Porous Micro-electrolytic Particles

[0038] Mix the iron-containing sludge produced in the iron-carbon micro-electrolysis process or the Fenton process with lignin, lignosulfonate, and modified bamboo wood powder in a mass ratio of 70:20:7:3, and then Drying, after the moisture content of the dry powder reaches below 30%, use dry granulation equipment to directly compress to obtain granules with a diameter of 3-20mm and have a suitable strength, and then place the granules under the condition of oxygen isolation under nitrogen protection, at a constant temperature of 800°C After sintering for 2 hours, take it out after naturally cooling to room temperature, and make porous micro-electrolytic particles. After testing, its specific surface area can reach 56m 2 / g, the iron content reaches 61%.

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Abstract

The invention discloses a method for preparing porous micro-electrolysis particles by using iron-carbon or Fenton sludge in a wastewater treatment process, comprising: combining iron-containing sludge produced in an iron-carbon micro-electrolysis process or a Fenton process in wastewater treatment with lignin, One or more of lignosulfonate and modified bamboo wood powder are mixed and granulated, and the granulation diameter ranges from 3 to 20 mm, and then put into a sintering furnace for high-temperature sintering to prepare porous micro-electrolytic particles. The invention provides a method for harmless disposal of iron-containing sludge produced by iron-carbon or Fenton processes in organic wastewater treatment. The prepared porous micro-electrolytic particles can continue to be used in wastewater treatment to form a resource cycle in the field of sewage treatment and become Waste to treasure, especially suitable for chemical, pharmaceutical, pesticide, dyestuff and other industries that often use iron carbon and Fenton process for organic wastewater pretreatment.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste and preparation of sewage treatment materials, and in particular relates to a method for preparing porous micro-electrolytic particles by utilizing iron carbon or Fenton sludge in a waste water treatment process. Background technique [0002] In chemical, pharmaceutical, pesticide, dye and other high-concentration and highly toxic organic wastewater treatment processes, the iron-carbon micro-electrolysis process and the Fenton process are simple to operate, have a high removal rate of organic matter, and can greatly improve the biodegradability of wastewater, so often It will be used for pre-biochemical pretreatment to ensure the stable operation of the subsequent biochemical process; in some cases, the iron-carbon process and micro-electrolysis process will also be used as the process choice for further advanced treatment at the end of the biochemical process, so the application range ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/28B01J20/20B01J20/30
CPCB01J20/06B01J20/20B01J2220/4806B01J2220/4825B01J2220/4837C02F1/281C02F1/283C02F1/46104C02F2201/46105
Inventor 甘琦
Owner 上海明奥环保科技有限公司
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