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Method for treating water-soluble polymer containing wastewater

A technology for water-soluble polymers and waste water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of systematic research on the process parameters of water-soluble polymer waste water, Removal of low efficiency, long treatment cycle and other problems, to achieve the effect of convenient operation, pollution reduction and high treatment efficiency

Active Publication Date: 2015-09-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above existing technologies for treating wastewater containing water-soluble polymers have technical problems such as low removal efficiency, high cost and long treatment cycle.
At the same time, there are few systematic studies on the actual process parameters of water-soluble polymer wastewater.

Method used

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  • Method for treating water-soluble polymer containing wastewater
  • Method for treating water-soluble polymer containing wastewater
  • Method for treating water-soluble polymer containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1000mL of wastewater containing water-soluble HPAM, the initial concentration of HPAM is 900mg / L, and the temperature is 303K. The pH values ​​of the system were adjusted to 8.0, 9.5, 10.5, 11.5, 12.5 and 13.5 using pH regulators. The pH regulator is one of hydrochloric acid, sodium hydroxide, calcium hydroxide and ammonia water. Add MgCl to the wastewater according to the dosage of 0.01mol / L-0.3mol / L and 0.02mol / L-0.6mol / L 2 and NaOH two reactants, maintain the oscillation speed of 150 rpm, shake for 2 hours, then centrifuge for 15 minutes, collect the supernatant, and conduct water quality analysis. against MgCl2 At different pH values, different dominant groups will appear, therefore, in the range of pH = 8.0-13.5, for MgCl 2 The dominant groups were studied. The result of practice shows that pH=9.5 is the optimum pH condition. It is determined that the removal rates of pollutants HPAM-1 and HPAM-2 can reach 98.9% and 93.9% respectively at pH=9.5, and the wa...

Embodiment 2

[0028] Take 1000mL of water-soluble HPAM wastewater, the pH value is 9.5, the initial concentrations of pollutants HPAM-1 and HPAM-2 are respectively 900mg / L, the temperature is controlled at 303K, and the reactant MgCl dropped into the wastewater 2 The dosages of NaOH and NaOH are 0.01mol / L-0.3mol / L and 0.02mol / L-0.6mol / L respectively; maintain the shaking speed at 160 rpm for 5 hours, then centrifuge for 10 minutes, and collect the supernatant Liquid, for water quality analysis, in the reactant MgCl 2 When the dosage reaches 0.3mol / L, the removal rates of two kinds of HPAM with different molecular weights can reach over 99% and 94% respectively, such as Figure 4 shown.

Embodiment 3

[0030] Get 1000mL of waste water containing water-soluble HPAM, the pH value is 9.5, the initial concentration of the pollutants HPAM-1 and HPAM-2 of two different molecular weights is 900mg / L, and the reactant MgCl 2 The dosage of NaOH and NaOH is 0.1mol / L and 0.2mol / L; the reaction temperature is controlled at 293K, 303K and 313K. Maintain the oscillation speed at 180 rpm and the oscillation time for 1 hour, then centrifuge for 20 minutes, collect the supernatant, and conduct water quality analysis. It is determined that the process of adsorbing HPAM from the water body is an endothermic reaction. Elevating the temperature will help Removal of HPAM. The processing results of this embodiment are shown in Figure 5(a) and Figure 5(b).

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Abstract

The invention discloses a method for treating water-soluble polymer containing wastewater, which comprises the following steps: (1) adjusting the pH value of the water-soluble polymer containing wastewater to 8-13.5; (2) putting a reactant MgCl2 into the water-soluble polymer containing wastewater with a concentration of 0.01-0.3 mol / L, and stirring for 30-40 minutes at room temperature, wherein in the process of stirring, the MgCl2 is completely dissociated into Mg<2+> and Cl<-> ions, and the Mg<2+> and HPAM are completely mixed and dissolved; and putting a reactant NaOH into the reaction system in a concentration of 0.02-0.6 mol / L, and continuing to stir for reaction so as to gradually form flocculent aggregates; (3) oscillating the water-soluble polymer containing wastewater for 10 minutes to 6 hours at an oscillating speed of 150-180 RPM, and carrying out centrifugal sedimentation for 10-20 minutes; and (4) after the standard is reached, discharging the obtained product. The method is simple, easy to operate, suitable for large-scale treatment, and high in treatment efficiency.

Description

technical field [0001] The invention relates to a method for treating water-soluble polymer waste water, which belongs to the technical field of sewage treatment. Background technique [0002] Water-soluble polymers are a class of chemical substances with a wide variety of products. They are often added to the colloidal dispersion system as additives to improve the dispersibility, bulk viscosity, touch and rheological properties of the colloid. Water-soluble polymers consist of polar and non-polar groups. Polar groups are easily solvated in water, while non-polar groups are polymer chain segments composed of repeating monomer units, which are not easily solvated in water. Therefore, water-soluble polymers combine polar and non-polar, hydrophilic and hydrophobic properties. It is precisely because of the rich surface and interfacial chemical properties of water-soluble polymers that water-soluble polymers are used in many fields, such as paint manufacturing, flotation and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 李玉江李枫董志浩吴涛
Owner SHANDONG UNIV
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