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Advanced treating method of biochemical tail water based on magnetic resin

A magnetic resin, advanced treatment technology, applied in chemical instruments and methods, flotation water/sewage treatment, adsorption water/sewage treatment, etc. The effect of high degree of automation and convenient operation

Inactive Publication Date: 2010-12-08
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the shortcomings of conventional large-particle resin (generally 0.3-1.2mm in diameter) fixed-bed adsorption process is difficult to regenerate and operation is complicated, the present invention provides a method for the advanced treatment of biochemical tail water based on magnetic resin, which makes full use of the performance of magnetic resin , while ensuring the adsorption efficiency, a continuous chemical and biochemical tail water advanced treatment combined method with magnetic small particle resin (diameter<0.2mm) adsorption as the core has been developed to improve resin adsorption, regeneration and recovery efficiency and reduce residence time. Simplify operation and stabilize effluent water quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Biochemical tail water (COD~100mg / L, SS~20mg / L, chromaticity~30 times) of a nitrobenzene chemical company, with 20m 3 The flow rate of / h evenly flows into 10m 3 Stirred reactor (pre-added 1m 3 Magnetic resin Magnetic styrene-based strong base anion exchange microsphere resin (the performance and preparation method of the resin can be found in the content of patent application 200910264445.X), developed by Nanjing University, the same below), and at the same time from the fresh resin tank with 0.1m 3 The flow rate of / h is pumped into the mixture of resin and water, and the adsorption reaction is carried out in the reactor. The mixture of resin and reacted effluent flows into the sedimentation tank equipped with inclined pipes, and the separation of resin and water is realized in it, and the upper part of the effluent can be discharged. 3 The flow rate per hour is discharged into the buffer tank, 80% of which is pumped into the reactor for reuse, and the remaining 20%...

Embodiment 2

[0025] The biochemical tail water (COD~150mg / L, SS~60mg / L, chroma~30 times) of the coking sewage treatment plant of a steel complex was treated with air flotation with chemicals, and was treated with 3000m 3 The flow of / d evenly flows into 80m 3 In the adsorption reaction pool (pre-added 6m 3 MIEX magnetic resin, the product of ORICA company in Australia, equipped with submersible stirring), at the same time from the fresh resin tank with 1.5m 3 The flow rate of / h is pumped into the mixture of resin and water, and the adsorption reaction is carried out in the reactor. The mixture of resin and reacted effluent flows into the sedimentation tank equipped with inclined pipes, and the separation of resin and water is realized in it. The upper part of the effluent can be discharged, and 80% of the mixed solution with high resin content precipitated at the bottom is pumped into the reactor. Reuse, and the remaining 20% ​​is sent to the regeneration tank. In the regeneration tank...

Embodiment 3

[0027] Biochemical tail water (COD~110mg / L, SS~50mg / L, chromaticity~40 times) of a sewage treatment plant of a large petrochemical enterprise, with 12000m 3 The flow of / d evenly flows into 300m 3 Adsorption reaction tank (pre-added 20m 3 Magnetic resin Magnetic acrylic acid series strong base anion exchange microsphere resin (M213 resin, the performance and preparation method of the resin can be found in the content of patent application 201010017687.1), developed by Nanjing University, the same below, equipped with aeration and stirring), at the same time from the fresh resin tank at 5m 3 The flow rate of / h is pumped into the mixture of resin and water, and the adsorption reaction is carried out in the reaction pool. The resin and the reacted effluent mixture flow into the sedimentation tower (with electromagnetic function) and realize the separation of resin and water in the tower. 85% of the precipitated resin is returned to the reaction tank, and 15% is pumped into the...

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Abstract

The invention relates to an advanced treating method of biochemical tail water based on magnetic resin, which belongs to the technical field of treatment of chemical waste water. The advanced treating method comprises the steps of: adding magnetic resin in a reactor; introducing biochemical tail water to flow through the reactor, and pumping a mixed liquid of resin and clean water to the reactor from a fresh resin pot; precipitating the treated mixed water in a magnetic or natural mode; returning a part of the precipitated resin to the reactor, and delivering the other part to a regeneration tank; adding a regeneration agent in the regeneration tank to regenerate the resin, and purifying for recycling or disposing the used regeneration agent; delivering the regenerated resin to a fresh resin storage tank for standby use, and recycling the resin in the reactor as required. By utilizing the advantages that the magnetic resin is easily to be separated and regenerated by magnetism and the like, and by combining the traditional processes of coagulation, air flotation and the like, the invention realizes advanced treatment to biochemical tail water rapidly, conveniently, economically and efficiently. The quality of the output water is stable and meets the requirements for advanced treatment or recycling, and the loss rate of the resin is 1 / 1,000,000 lower than that of the water being treated.

Description

technical field [0001] The invention relates to a method for advanced treatment of chemical and biochemical tail water, in particular to a method for advanced treatment of biochemical tail water with magnetic resin adsorption as the core. Background technique [0002] Biochemical technology is an important means of wastewater treatment in petrochemical, coal chemical, chemical intermediate, fine chemical, coking and other enterprises and chemical parks. In chemical and biochemical tail waters, there are usually refractory toxic organic pollutants that have not been biodegraded (such as halogenated Hydrocarbons, heterocyclic organics, nitrobenzene organics, etc.), there are also humic organic pollutants with larger molecules produced in the process of biological decomposition and metabolism. Although the chemical and biochemical tail water has reached or approached the requirements of the relevant standards, the remaining above-mentioned substances still have biological toxic...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/28C02F1/52C02F1/24C02F101/30
Inventor 李爱民陆朝阳姜笔存双陈东周友东范俊周庆韩宪平凌洪吉王津南刘福强
Owner NANJING UNIV
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