Preparation method and application of magnetic reduction microbial flocculant

A microbial flocculant and flocculant technology, applied in chemical instruments and methods, reduced water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low efficiency of reducing heavy metals, and achieve simple and rapid separation and recovery, flocculation High efficiency and easy recycling

Active Publication Date: 2020-04-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of low heavy metal reduction efficiency of existing microbial flocculants, the present invention proposes a preparation method and application of magnetically reduced microbial flocculants

Method used

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  • Preparation method and application of magnetic reduction microbial flocculant
  • Preparation method and application of magnetic reduction microbial flocculant

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Experimental program
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specific Embodiment approach 1

[0030] Embodiment 1: The preparation method of the magnetic reduction microbial flocculant in this embodiment is carried out according to the following steps:

[0031] 1. Preparation of Fe 3 o 4 Particles:

[0032] FeCl 3 ·6H 2 O and FeSO 4 ·7H 2 Dissolve O in distilled water 1, heat in a water bath to 85°C-95°C, then add ammonia water and distilled water 2 with a mass fraction of 25% in sequence, stir and react at a temperature of 85°C-95°C for 20min-40min, and then naturally cool to room temperature , centrifuged to collect the black precipitate; use distilled water to wash the black precipitate until the washing solution is neutral to obtain the magnetic Fe 3 o 4 particles;

[0033] 2. Preparation of microbial flocculant MFX solution:

[0034] Dissolve the dry powder of microbial flocculant MFX in distilled water, and then place it on a magnetic stirrer to stir evenly to obtain a microbial flocculant MFX solution with a concentration of 1.5g / L-2.5g / L;

[0035] 3. ...

specific Embodiment approach 2

[0043] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is:

[0044] FeCl as described in step 1 3 ·6H 2 The mass ratio of O to distilled water 1 is (6g~7g):100mL;

[0045] FeSO as described in step one 4 ·7H 2 The volume ratio of the mass of O to distilled water 1 is (4g~5g):100mL;

[0046] The volume ratio of ammonia water with a mass fraction of 25% and distilled water 2 described in step 1 is (18-20):100, and the volume ratio of distilled water 2 and distilled water 1 is (40-60):100. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0047] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the specific preparation method of the microbial flocculant MFX dry powder described in step two is carried out according to the following steps:

[0048] (1) Take 15mL of fresh activated sludge from Taiping Sewage Treatment Plant in Harbin and add it to a 100mL LYP liquid basal medium conical flask, place it in a shaker with a temperature of 30°C and a rotation speed of 150r / min for 18-48h to obtain Enriched bacteria liquid;

[0049] (2), take 15mL of the enriched bacteria liquid and add it to a 100mL LYP liquid basal medium conical flask, repeat the culture conditions of step (1) for 3 to 4 times to obtain the domesticated bacteria liquid;

[0050] (3) Gradual dilution of the domesticated bacterial solution, the dilution gradients are 10-1, 10-2, 10-3, 10-4, 10-5, 10-6, respectively, take 100 μL of the domesticated bacterial solution and add it to the YP solid basa...

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Abstract

The invention discloses a preparation method and application of a magnetic reduction microbial flocculant, and relates to a preparation method and application of a microbial flocculant. The inventionaims to solve the problem of low heavy metal reduction efficiency of a microbial flocculant. The preparation method comprises the steps: 1, preparing Fe3O4 particles; 2, preparing a microbial flocculant MFX solution; 3, preparing a magnetic microbial flocculant; and 4, loading generated zero-valent iron on the magnetic microbial flocculant by adopting a liquid phase reduction method to obtain themagnetic reduction microbial flocculant. The flocculant has the advantages of high efficiency, suitability for treating low-concentration heavy metal wastewater and the like, has the characteristics of magnetic separation and high reduction adsorption, is easy to separate and recover, has high flocculation efficiency and high reduction adsorption efficiency, and avoids secondary pollution; and thepreparation process is simple, easy to recycle and easy to amplify, and the flocculation usage amount is reduced. The method is suitable for flocculant preparation and heavy metal removal.

Description

technical field [0001] The invention relates to a preparation method and application of a microbial flocculant. Background technique [0002] The rapid development of industry and agriculture in recent years has led to an increase in heavy metal emissions from more and more industries such as smelting, electroplating, chemical industry, and tanning. The increased use of pesticides and fertilizers has also led to frequent occurrence of heavy metal pollution incidents. Heavy metals cannot be biodegraded, and are easily accumulated in large quantities in organisms. Trace amounts of heavy metals in environmental media can be enriched hundreds of times or even hundreds of thousands of times in organisms, and then poison the human body through the food chain. Therefore, how to effectively control heavy metal pollution has become one of the problems to be solved in the field of environmental protection. [0003] There are many conventional methods for treating heavy metals, mainly...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/48C02F1/52C02F1/70C02F101/20
CPCC02F1/281C02F1/488C02F1/5236C02F1/705C02F2001/007C02F2101/20
Inventor 李昂周璐杨基先汤爱琪皮姗姗马放
Owner HARBIN INST OF TECH
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