Flocculating agent for treating printing and dyeing sewage and sewage treatment method

A technology for printing and dyeing sewage and sewage treatment, which is applied in water/sewage treatment, flocculation/sedimentation water/sewage treatment, adsorbed water/sewage treatment, etc. The effect of shortening standing and stratification time, fast settling effect and convenient use

Inactive Publication Date: 2020-05-19
YUNCHENG UNIVERISTY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the printing and dyeing factories, the cloth needs to be desized before printing and dyeing. At present, the yarn sizing mainly uses starch and other raw materials, and some also add polyvinyl alcohol. When strong alkali is used, it forms a paste; thus, the printing and dyeing slurry wastewater contains a large amount of starch, sugar, glue, PVA polymer macromolecules and other macromolecular substances that swell with water, which has great water absorption, Adhesiveness, which seriously affects the flocculation and sedimentation of sludge; prolongs the treatment time of printing and dyeing wastewater

Method used

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  • Flocculating agent for treating printing and dyeing sewage and sewage treatment method
  • Flocculating agent for treating printing and dyeing sewage and sewage treatment method
  • Flocculating agent for treating printing and dyeing sewage and sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A flocculant for treating printing and dyeing sewage, specifically comprising the following raw materials in parts by weight,

[0031]

[0032] The magnetized ceramic particles include the following raw materials in parts by weight: ceramic blank Pb 3 o 4 : 70 parts; magnetizable material SrCO 3 : 4.5 parts; magnetizable material MnO 2 : 22.5 copies;

[0033] The preparation method of the magnetized ceramic particles is:

[0034] Step 1, ball milling: firstly mix the magnetizable material and the ceramic blank, and then add deionized water according to the ratio of material to liquid of 1:30; the ball milling time is 4 hours, pass through a 50-mesh sieve, and obtain ceramic slurry A;

[0035] Step 2. Pre-firing: Dry the ceramic slurry A at 120°C, crush it, pass through a 50-mesh sieve, raise the temperature to 1100°C at a rate of 2°C / min, keep it warm for 3 hours, and cool to obtain a pre-fired material;

[0036] Step 3, ball milling again: according to the mate...

Embodiment 2

[0042] A flocculant for treating printing and dyeing sewage, specifically comprising the following raw materials in parts by weight,

[0043]

[0044] The magnetized ceramic particles include the following raw materials in parts by weight: the same as in Example 1.

[0045] The preparation method of the magnetized ceramic particles is as follows: the same as in Example 1.

[0046] A kind of method that utilizes above-mentioned flocculant to carry out sewage treatment: with embodiment 1

Embodiment 3

[0048] A flocculant for treating printing and dyeing sewage, specifically comprising the following raw materials in parts by weight,

[0049]

[0050] The magnetized ceramic particles include the following raw materials in parts by weight: the same as in Example 1.

[0051] The preparation method of the magnetized ceramic particles is as follows: the same as in Example 1.

[0052] A method for sewage treatment using the above-mentioned flocculant: same as in Example 1.

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PUM

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Abstract

The invention relates to a flocculating agent for treating printing and dyeing sewage and a sewage treatment method. The flocculating agent specifically comprises the following raw materials in partsby weight: 40-50 parts of acrylamide; 10 to 15 parts of bauxite; 0.2 to 1.0 part of active carbon; 3 to 5 parts of EDTA; and 0.5 part of a catalyst BiVO4. The sewage treatment method specifically comprises the following steps: adjusting the pH value of printing and dyeing sewage to 6.5-7.5, adding acrylamide, bauxite, activated carbon, EDTA andcatalyst BiVO4, stirring for 2-3 hours, standing for 12 hours until layering, and pumping out sludge by using a sludge pump. The sedimentation of macromolecular substances in the printing and dyeing wastewater is promoted, the separation rate of sludge and wastewater is effectively increased, the sedimentation effect is fast, the dosage is small, and the use is convenient.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a flocculant for treating printing and dyeing sewage and a sewage treatment method. Background technique [0002] China is the world's largest producer and exporter of textiles and clothing, so the printing and dyeing industry is closely related to it, and the wastewater discharge of the printing and dyeing industry is one of the key industries that cause water pollution in my country. Compared with other industries, printing and dyeing wastewater has a large amount of wastewater discharge , deep color, high content of refractory organic matter, unstable water quality and so on. [0003] For the treatment of printing and dyeing wastewater, the existing treatment technologies mainly treat printing and dyeing wastewater through physical and chemical treatment and biochemical treatment in order, so as to degrade harmful substances and meet the discharge standards. For the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/54C02F1/28C02F1/48C02F103/30C02F101/20
CPCC02F1/54C02F1/283C02F1/488C02F2103/30C02F2101/20
Inventor 张晓斌
Owner YUNCHENG UNIVERISTY
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