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Environment-friendly treatment method for papermaking deinking wastewater

A technology for deinking wastewater and environmental protection treatment, applied in the direction of processing wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of ecological environment damage, high content of suspended solids, waste of water resources, etc., to achieve The effect of saving operating costs, fast flocculation reaction speed, and fast settlement speed

Inactive Publication Date: 2020-04-14
李洪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of waste water will be generated during the recycling of waste paper, which mainly contains hemicellulose, lignin, inorganic salts, fine fibers, ink, dyes and other pollutants, as well as sodium silicate, Surfactants, etc., the suspended solids content (SS), COD, turbidity and other indicators of wastewater are high, direct discharge will bring water pollution and serious damage to the ecological environment, and also cause a great waste of water resources

Method used

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  • Environment-friendly treatment method for papermaking deinking wastewater
  • Environment-friendly treatment method for papermaking deinking wastewater
  • Environment-friendly treatment method for papermaking deinking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The environmental protection treatment method of papermaking deinking wastewater comprises the following steps:

[0043] (1) Add natural polymer flocculant in the amount of 70 mg / L to the papermaking deinking wastewater, stir and flocculate at 300 rpm for 2 hours, let it settle for 90 minutes, and collect the liquid after solid-liquid separation;

[0044] (2) add shell powder adsorbent to the liquid obtained in step (1) according to the addition amount of 110 mg / L, and stir and absorb with 300 rpm for 3 hours to realize solid-liquid separation;

[0045] The shell powder adsorbent is obtained by calcining shell powder at 600° C. for 2 hours in an air atmosphere, and then crushing through a 300-mesh sieve.

[0046] Described natural macromolecule flocculant comprises following raw material by mass percent: 20wt% starch graft copolymer, 5wt% diatomite, 10wt% chitosan, 15wt% magnesium lignosulfonate graft copolymerization matter, and the balance is guar gum.

[0047] All ...

Embodiment 2～5

[0051] The environmental protection treatment method of papermaking deinking wastewater comprises the following steps:

[0052] (1) Add natural polymer flocculant in the amount of 70 mg / L to the papermaking deinking wastewater, stir and flocculate at 300 rpm for 2 hours, let it settle for 90 minutes, and collect the liquid after solid-liquid separation;

[0053] (2) add shell powder adsorbent to the liquid obtained in step (1) according to the addition amount of 110 mg / L, and stir and absorb with 300 rpm for 3 hours to realize solid-liquid separation;

[0054] The shell powder adsorbent is obtained by calcining shell powder at 600° C. for 2 hours in an air atmosphere, and then crushing through a 300-mesh sieve.

[0055] Described natural macromolecule flocculant comprises following raw material by mass percent: 20wt% starch graft copolymer, 5wt% diatomite, 10wt% chitosan, 15wt% magnesium lignosulfonate graft copolymerization substance, and the balance is cationic guar gum.

...

Embodiment 2

[0062] The difference between Examples 2 to 5 is that the ionic liquids used are different. The ionic liquid used in Example 2 is chlorinated 1-allyl-3-methylimidazolium ionic liquid, and the ionic liquid used in Example 3 is chlorinated 1 -Butyl-3-methylimidazole ionic liquid, the ionic liquid used in Example 4 is 1-allyl-3-methylimidazolium acetate ionic liquid, and the ionic liquid used in Example 5 is 1-butyl- 3-Methylimidazolium acetate ionic liquid.

[0063] The nitrogen content of cationic guar gum was determined by Kjeldahl method: with CuSO 4 、K 2 SO 4 As a catalyst, the cationic guar gum is cracked with concentrated sulfuric acid, alkalized and distilled to release nitrogen; the product is collected with 2% boric acid solution, titrated with hydrochloric acid standard solution, and the nitrogen content of the cationic guar gum can be obtained by calculation.

[0064] The calculation formula is as follows: X=1.401×C×(V 1 -V 0 ) / m×100%;

[0065] In the formula: X...

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Abstract

The invention discloses an environment-friendly treatment method of papermaking deinking wastewater. The method comprises the following steps: (1) adding a natural polymer flocculant into papermakingdeinking wastewater, carrying out stirring flocculating treatment for 1-2 hours, carrying out standing precipitating for 30-90 minutes, carrying out solid-liquid separation, and collecting the liquid;(2) adding a shell powder adsorbent into the liquid obtained in the step (1), and carrying out stirring adsorbing treatment for 1-4 hours to realize solid-liquid separation, wherein shell powder is calcined in an air atmosphere at 500-800 DEG C for 2-5 hours, and crushing and sieving are performed to obtain the shell powder adsorbent. According to the environment-friendly treatment method for papermaking deinking wastewater, the same treatment effect is achieved while and the dosage of the required agent is small, the flocculation reaction speed is high, the formed floc is large in size, thesettling speed is high, the adaptability to the change of water quality is high, the quality of the treated effluent is stable, the operation cost is saved, and the method is a competitive novel environment-friendly treatment method for papermaking deinking wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an environmentally friendly treatment method for papermaking deinking wastewater. Background technique [0002] With the strengthening of human awareness of natural resource protection and the emphasis on environmental pollution, people have gradually realized the importance and superiority of using waste paper to produce deinked pulp for papermaking, which has led to the increase of secondary fibers in the raw material structure of the papermaking industry. Proportion. A large amount of waste water will be generated during the recycling of waste paper, which mainly contains hemicellulose, lignin, inorganic salts, fine fibers, ink, dyes and other pollutants, as well as sodium silicate, Surfactants, etc., the suspended solids content (SS), COD, turbidity and other indicators of wastewater are high, direct discharge will bring water pollution and serious damage to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/28
CPCC02F1/5263C02F1/56C02F1/281C02F2103/28
Inventor 李洪
Owner 李洪
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