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Method for treating coal gas wastewater by adding functional magnetic microspheres and utilizing MBR (membrane bioreactor)

A magnetic microsphere and wastewater treatment technology, which is applied in natural water treatment, water treatment parameter control, chemical instruments and methods, etc., can solve problems such as reducing the treatment effect of MBR technology, increasing membrane flux and effluent quality, and clogging membrane channels. , to achieve the effects of prolonging the membrane cleaning cycle, shortening the sludge domestication cycle, and efficient recovery

Inactive Publication Date: 2018-11-06
北京北控工业环境科技有限公司 +1
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because on the one hand, the refractory organic matter in the coal gas wastewater has an inhibitory effect on the activated sludge, which greatly reduces the treatment effect of the MBR technology on this type of wastewater; on the other hand, the treatment of pollutants and microbial metabolites in the mixed liquid not only It will be adsorbed on the surface of the membrane, and will block the membrane pores. The occurrence of these phenomena will aggravate the reduction of membrane flux and effluent quality.

Method used

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  • Method for treating coal gas wastewater by adding functional magnetic microspheres and utilizing MBR (membrane bioreactor)
  • Method for treating coal gas wastewater by adding functional magnetic microspheres and utilizing MBR (membrane bioreactor)

Examples

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preparation example Construction

[0050] The preparation method of the above-mentioned functionalized magnetic microspheres comprises the following steps:

[0051] (1) Under the protection of nitrogen, in the FeCl-containing 2 and FeCl 3 Add ammonia water to the solution, stir and react to get Fe 3 o 4 particles;

[0052] (2) Fe 3 o 4 Particles are used as functionalized magnetic microsphere units, which are prepared by adding tetrahydrofuran aqueous solution under ultrasonic vibration 3 o 4 ferrofluid;

[0053] (3) adding the organic polymer film material and surface functionalized organic matter into the organic solvent to make the organic phase;

[0054] (4) Fe 3 o 4 The ferrofluid is added into the organic phase for ultrasonic emulsification to form a composite liquid C1;

[0055] (5) Adding deionized water to the compound liquid C1 to emulsify again to form the compound liquid C2;

[0056] (6) Add deionized water to the composite solution C2, stir and solidify at room temperature, and wash wit...

Embodiment 1

[0065] Embodiment 1: Preparation of functionalized magnetic microspheres

[0066] Choose chemically pure FeCl 2 and FeCl 3 The masses were 12.8g and 32.4g respectively, and were added into a three-necked flask filled with 500mL of deionized water at a molar ratio of 1:2. 300r / min, stir (after 30min, obtain nanoscale Fe 3 o 4 Microparticles, after cooling to room temperature, washed Fe with deionized water 3 o 4 Microparticles 3 times to obtain Fe with an average particle size range of 5-10nm 3 o 4 Granules, dry for later use.

[0067] The above average particle size of Fe 3 o 4 Nanoparticles are prepared by adding 1% tetrahydrofuran aqueous solution in an ultrasonic vibration environment to make nano-Fe 3 o 4 Ferrofluid, the concentration is 150mg / L.

[0068] Add poly(lactic acid-ethylene glycol) microspherical membrane materials with a molecular weight of 30,000-50,000 and poly-N-isopropylacrylamide to ethyl acetate at a mass ratio of 100:1 to make a concentration...

Embodiment 2

[0072] Example 2: Adding functionalized magnetic microspheres and using MBR to treat coal-gas wastewater

[0073] The MBR device used in this embodiment is as figure 1 As shown, and this embodiment adopts 4 sets of parallel MBR devices to carry out the test.

[0074] The main pollutants of the coal-to-gas wastewater injected into the MBR unit are as follows:

[0075] COD: 3215mg / L;

[0076] NH 3 -N: 183.1mg / L;

[0077] Total phenols (TPh): 575.4mg / L.

[0078] Add activated sludge to the 4 sets of MBR pools respectively until the activated sludge concentration (MLSS) is 5000mg / L. In addition, the functionalized magnetic microspheres (average particle size 10 μm) prepared in Example 1 were added to the 4 sets of MBR respectively, and the dosing concentrations were 0 mg / L, 100 mg / L, 200 mg / L and 500 mg / L. Turn on the aeration system 6 to carry out biochemical cultivation of the sludge. After 10-15 days of cultivation, the MLSS is increased to 10000mg / L. When the membrane i...

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Abstract

The invention belongs to the technical field of sewage treatment and relates to a method for treating coal gas wastewater by adding functional magnetic microspheres and utilizing an MBR (membrane bioreactor). The method comprises the following steps: adding the functional magnetic microspheres and activated sludge to the MBR, and performing biochemical treatment on the coal gas wastewater under the condition that gas-liquid turbulence on the membrane surface is enhanced. According to the method for treating the coal gas wastewater by adding the functional magnetic microspheres and utilizing the MBR, when the MBR technique is used for treating the coal gas wastewater, membrane pollution can be reduced and alleviated while the treatment capacity and effect are improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to a method for treating coal gas waste water by adding functionalized magnetic microspheres and using MBR. Background technique [0002] Coal plays a dominant role in my country's energy structure, accounting for about 70% of the primary energy structure. Therefore, the coal industry is an important basic industry related to the country's economic lifeline and energy security. [0003] Coal-to-gas can not only solve the transportation constraints caused by the uneven geographical distribution and consumption space of coal in my country, but also can be used as clean energy for chemical synthesis processes, thereby promoting the industrial upgrading of my country's coal resources to clean energy. Therefore, coal-to-gas technology, as an advanced technology for clean and efficient use of coal, is a hot technology in the field of energy research and a key technology in developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F103/34
CPCC02F3/1215C02F3/1268C02F2103/34C02F2209/10Y02W10/10
Inventor 高放刘洋邢林林马宁平张志刚姚庆覃军刘广海曹春雷
Owner 北京北控工业环境科技有限公司
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