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Printing and dyeing wastewater treatment method and preparation method of compound biological flocculant

A biological flocculant and treatment method technology, applied in the field of wastewater treatment, can solve problems such as threats to life and health, secondary pollution of drainage, insufficient stability, etc., and achieve the effects of good removal effect, low production cost, and easy production

Active Publication Date: 2016-03-23
威海汉邦生物环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal rate of this kind of flocculant to wastewater COD and chroma is low and not stable enough, and the effluent cannot fully meet the discharge or reuse standards
In addition, the unavoidable residues of aluminum ions and PAM monomer - acrylamide, have secondary pollution to drainage, and enter the human body or other animals and plants through various channels, which will pose a serious threat to life and health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Take 500mL of a certain biochemical printing and dyeing wastewater (COD about 142mg / L, T-P about 0.8mg / L, chroma about 100) in a beaker and place it on a magnetic stirrer;

[0034] (2) Turn on the agitator, add 0.5ml of composite biological flocculant solution, add biological flocculant (concentration 10mg / L) after about 30s, the dosage is 0.1ml, continue to stir for 30s;

[0035] (3) After the coagulation reaction, the beaker was left to stand for about 5 minutes, and the supernatant was taken to measure the COD of 64 mg / L, T-P of 0.25 mg / L, and chromaticity of 40.

Embodiment 2

[0037] (1) Take 500mL of a certain biochemical printing and dyeing wastewater (COD about 142mg / L, T-P about 0.8mg / L, chroma about 100) in a beaker and place it on a magnetic stirrer;

[0038] (2) Turn on the agitator, add 0.625ml of composite biological flocculant solution, add biological flocculant (concentration 10mg / L) after about 30s, the dosage is 0.1ml, continue to stir for 30s;

[0039] (3) After the coagulation reaction, the beaker was left to stand for about 5 minutes, and the supernatant was taken to measure the COD of 54 mg / L, T-P of 0.15 mg / L, and chromaticity of 30.

Embodiment 3

[0041] (1) The rice straw is added into the sodium hydroxide solution with a mass fraction of 1% according to the solid-to-liquid ratio of 1:8, reacted for later use, and the high-efficiency cellulose-degrading bacteria are inserted into the prepared material to complete the saccharification.

[0042] (2) Take 1000ml of straw saccharification solution, K 2 HPO 4 5g, KH 2 PO 4 2g, adjust the pH value to 7.5, and prepare the culture medium;

[0043] (3) Insert the floc-producing flora EM into the culture medium at a ratio of 1:10, put it into a constant temperature water bath shaker, set the temperature at 30°C, and cultivate for 3 days;

[0044] (4) centrifuging the obtained culture solution to separate the bacterial cells and the bacterial liquid. Collect the supernatant, concentrate the supernatant to 1 / 2 of the original volume, add 3 times the volume of 4°C absolute ethanol to the concentrated supernatant, and cool it for 24 hours. Pour off the liquid, retain the precip...

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Abstract

The invention provides a printing and dyeing wastewater treatment method and a preparation method of a compound biological flocculant. The printing and dyeing wastewater treatment method comprises the steps that 1, anaerobic acidification treatment is performed on the wastewater, and macromolecular substances are degraded through the action of two biotic populations of suspended activated sludge and attached biological films; 2, aerobic biochemical treatment is performed on the wastewater to remove chromaticity, odor and viscous substances in the wastewater; 3, sludge-water separation is performed on the wastewater; 4, the compound biological flocculant and a biological flocculant are added through a pipeline or in a stirring and mixing mode; 5, microfiltration is performed on precipitation yielding water to remove a small amount of residual suspended matter in the wastewater, and then the yielding water is drained or reused. According to the printing and dyeing wastewater treatment method and the preparation method of the compound biological flocculant, the anaerobic biochemical treatment and the aerobic biochemical treatment are sequentially adopted to perform pretreatment on the wastewater, the compound biological flocculant and the biological flocculant are adopted for flocculation and sedimentation, the chromaticity and COD removing effects are good, and secondary pollution cannot be caused; the compound biological flocculant is low in production cost and easy to produce.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating printing and dyeing wastewater, and also relates to a method for preparing a composite biological flocculant. Background technique [0002] China is a big country in textile printing and dyeing production, and the discharge of printing and dyeing wastewater is huge. Printing and dyeing wastewater usually refers to the comprehensive wastewater discharged from various printing and dyeing processes such as desizing wastewater, boiling wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater, printing wastewater, soap wastewater and finishing wastewater. Due to different production materials and production processes, the water quality of printing and dyeing wastewater in various enterprises is quite different, and the water quality parameters fluctuate within the following data ranges: pH is about 6-10, COD400-1000mg / L, BOD 5 100...

Claims

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Application Information

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IPC IPC(8): C02F9/14C12P1/00C02F103/30
Inventor 庄茅胡阳倪小朋谭伟龙王晓东管涛陈亚红
Owner 威海汉邦生物环保科技股份有限公司
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