Preparation method of compound flocculating agent for adsorbing metal ions

A technology of metal ions and flocculants, applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, separation of microorganisms, etc., can solve the problems of low activity, poor adsorption, and low utilization rate of flocculants, and achieve high-efficiency flocculation, The effect of improving utilization and activity

Inactive Publication Date: 2018-02-13
张芸
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems of low utilization rate, poor adsorption and lo

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  • Preparation method of compound flocculating agent for adsorbing metal ions

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Example Embodiment

[0029] A preparation method of a composite adsorbing metal ion flocculant includes the following steps:

[0030] (1) Take the sludge and add it to a beaker containing deionized water at a mass ratio of 1:5, place it on a magnetic stirrer and stir for 10 minutes, let it stand for 1~2 hours, centrifuge, collect the supernatant, and take the supernatant by mass Four equal parts were respectively inoculated into No. 1 bacterial liquid medium, No. 2 mold liquid medium, No. 3 actinomycete liquid medium, No. 4 fungus liquid medium at a mass ratio of 2:9, and cultivated at 25~33℃. ~5 days, according to the same inoculation amount and the same culture conditions, repeat the enrichment culture twice to obtain the enrichment culture solution No. 1, No. 2, No. 3, and No. 4. Use 0.9% normal saline to mix one No. 2, No. 2, No. 3, and No. 4 enriched culture medium were diluted to 10 -6 Dilution degree, after dilution, No. 1, No. 2, No. 3, No. 4 enriched culture solution, streaked and inoculated...

Example Embodiment

[0034] Example 1

[0035] Flocculant extraction raw material: take the sludge from the river water and store it at 4℃.

[0036] Bacterial solid culture medium No. 1: Take 3 parts of beef extract, 6 parts of peptone, 15 parts of agar, 2 parts of NaCl, 1000 parts of water, pH7, and sterilize at 121°C for 20 minutes.

[0037] No. 2 mold solid medium: take 20 parts of sucrose, NaNO 3 1 serving, K 2 HPO 4 0.5 part, MgSO 4 0.2 part, FeSO 4 0.01 parts, 13 parts agar, 1000 parts water, pH 7, sterilized at 115°C for 20 minutes.

[0038] Solid medium for Actinomycetes No. 3: Take 18 parts of soluble starch, KNO 3 0.6 copies, K 2 HPO 4 0.3 parts, MgSO 4 ·7H 2 O0.2 parts, FeSO 4 ·7H 2 0.02 parts of O, 0.4 parts of NaCl, 15 parts of agar, 1000 parts of water, pH 7, sterilized at 121°C for 20 minutes.

[0039] No. 4 fungal solid medium: Take 180 parts of potato, 20 parts of sucrose, 18 parts of agar, 1000 parts of water, natural pH, and sterilize at 121°C for 20 minutes by mass.

[0040] One, two, thr...

Example Embodiment

[0048] Example 2

[0049] Flocculant extraction raw material: take the sludge from the river water and store it at 4℃.

[0050] No. 1 bacterial solid medium: Take 5 parts of beef extract, 10 parts of peptone, 20 parts of agar, 3 parts of NaCl, 1000 parts of water, pH 7.4, and sterilize at 121°C for 20 minutes.

[0051] No. 2 mold solid medium: Take 25 parts of sucrose, NaNO 3 2 servings, K 2 HPO 4 0.8 parts, MgSO 4 0.3 parts, FeSO 4 0.03 parts, 15 parts agar, 1000 parts water, pH 7.2, sterilized at 115°C for 20 minutes.

[0052] Solid culture medium for Actinomycetes No. 3: Take 20 parts of soluble starch, KNO 3 1 serving, K 2 HPO 4 0.6 part, MgSO 4 ·7H 2 O0.5 part, FeSO 4 ·7H 2 0.03 parts of O, 0.7 parts of NaCl, 20 parts of agar, 1000 parts of water, pH 7.4, sterilized at 121°C for 20 minutes.

[0053] No. 4 fungal solid medium: Take 200 parts of potato, 22 parts of sucrose, 20 parts of agar, 1000 parts of water, natural pH, and sterilize at 121°C for 20 minutes by mass.

[0054] One, ...

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Abstract

The invention discloses a preparation method of a composite flocculant for adsorbing metal ions, and belongs to the technical field of flocculants. The present invention separates and screens four microbial flocculant-producing bacteria with the highest flocculation activity from river sludge, mixes and ferments to obtain microbial flocculants, and produces high molecular compounds such as glycoproteins, mucopolysaccharides, proteins, cellulose, and nucleic acids. After soaking in water, the fine particles and natural colloidal particles in the water can be condensed into large flocs, which can be removed from the water. They have high-efficiency flocculation and improve the utilization rate and activity of the flocculant. Using α-ketoglutaric acid to modify chitosan, synthesize chitosan derivatives with higher adsorption capacity, introduce -NH2 to react with carbonyl groups, and introduce carboxyl groups to form stable five-membered ring chelation with metal ions It can effectively absorb heavy metal ions in wastewater. The invention solves the problems of low utilization rate, poor adsorption and low activity of the current flocculant for sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a preparation method of a composite flocculant for adsorbing metal ions. Background technique [0002] With the development of modern industry and frequent human activities, heavy metal pollution in the ecological environment is becoming more and more serious. In recent years, the frequent occurrence of blood lead and cadmium rice incidents once again shows that heavy metal pollutants can pass through media such as air, water or soil directly or indirectly. Therefore, it has become the focus of our government's work to actively carry out research on the pollution behavior of heavy metals and its prevention and control. [0003] The direct discharge of heavy metal sewage will not only cause serious pollution to the environment, but also directly affect the healthy life of human beings. Among them, the heavy metal cadmium has the characteristics of high toxicity an...

Claims

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Application Information

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IPC IPC(8): C02F3/34C12N1/20C12N1/14C12N1/02C12P21/00C12P19/04C12P19/34C02F101/20
CPCC02F3/34C02F1/56C02F2101/20C12N1/02C12N1/14C12N1/20C12P19/04C12P19/34C12P21/00
Inventor 张芸李璐刘沁
Owner 张芸
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