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Preparation method of suspension gradient biological film

A biofilm and biofilm reactor technology, applied in the field of water treatment, can solve the problems of incapable of hierarchically treating micro-polluted wastewater and low biofilm efficiency, and achieve the effect of improving biocompatibility and interface compatibility

Inactive Publication Date: 2018-11-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a suspended cascaded biofilm in view of the low efficiency of the current biofilm and the inability to treat micro-polluted wastewater in a hierarchical manner

Method used

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  • Preparation method of suspension gradient biological film
  • Preparation method of suspension gradient biological film
  • Preparation method of suspension gradient biological film

Examples

Experimental program
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preparation example Construction

[0026] A method for preparing a suspended step biofilm, comprising the steps of:

[0027] (1) According to the mass ratio of 1:2~5:10~15, take auxiliary materials, nano-titanium dioxide, and polypropylene, mix them, put them into a twin-screw extruder, and carry out melt mixing at a head temperature of 200~250°C and a screw speed of 2~5r / min. 10 to 20 minutes to obtain a premix, add polypropylene and additives to the premix at a mass ratio of 4:2 to 4:0.1 to 0.4, melt and mix for 15 to 25 minutes, and cool the extruded strip to room temperature in a water tank. Introduce granulator to granulate to get TiO 2 / PP particles, spare;

[0028] (2) In a water bath at 45-60°C, mix polyethylene glycol, water, and starch at a mass ratio of 5-7:4:3, and stir at 400-550r / min for 30-50min to obtain a mixture. Mass ratio 4: 0.5-1.2: 0.01 Add octyllin and gum arabic to mix, shear and disperse at 1000-1500r / min for 15-30min to obtain a coating emulsion;

[0029] (3) Take the spare TiO in s...

Embodiment 1

[0032] Auxiliary: Mix potassium chloride, sodium chloride, and dichloromethane at a mass ratio of 1:1:7 to obtain the auxiliary.

[0033] Excipients: Mix 12-hydroxystearic acid, stannous chloride, and xylene at a mass ratio of 10:1:7, heat and reflux at 160°C for 20 hours, distill under reduced pressure to obtain a paste, take the paste and add to the paste Xylene mixed with 0.8 times the weight of the solid, added to reflux at 130°C for 3 hours to obtain auxiliary materials.

[0034] Dopamine liquid: Take dopamine and NaHCO according to the mass ratio of 4:1:1:15 3 、Na 2 CO 3 , water, and ultrasonically disperse for 10 minutes to obtain the dopamine solution.

[0035] Nutritious water: in parts by mass, take 10 parts of NH 4 Cl, 3 parts of glucose, 3 parts of KH 2 PO 4 , 2 parts of CaCl 2 ·H 2 O, 2 parts of MgSO 4 ·7H 2 O, 0.3 parts of CuSO 4 ·5H 2 O, 1 part of MnCl 2 4H 2 O, 0.4 parts of FeCl 2 4H 2 O, 0.3 parts of ZnSO 4 ·7H 2 O, 0.1 part of CoCl 2 ·6H 2...

Embodiment 2

[0042] Auxiliary: Mix potassium chloride, sodium chloride, and dichloromethane at a mass ratio of 1:2:10 to obtain the auxiliary.

[0043] Excipients: Mix 12-hydroxystearic acid, stannous chloride, and xylene at a mass ratio of 13:1:8, heat and reflux at 165°C for 22 hours, distill under reduced pressure to obtain a paste, take the paste and add to the paste Xylene mixed with 1.1 times the weight of the solids, added to reflux reaction at 137 ° C for 4 hours, to obtain auxiliary materials.

[0044] Dopamine liquid: Take dopamine and NaHCO according to the mass ratio of 4:1:1:17 3 、Na 2 CO 3 , water, and ultrasonically disperse for 13 minutes, that is, the dopamine solution.

[0045] Nutritious water: in parts by mass, take 13 parts of NH 4 Cl, 5 parts of glucose, 5 parts of KH 2 PO 4 , 4 parts of CaCl 2 ·H 2 O, 4 parts of MgSO 4 ·7H 2 O, 0.5 part of CuSO 4 ·5H 2 O, 3 parts of MnCl 2 4H 2 O, 0.6 parts of FeCl 2 4H 2 O, 0.5 parts of ZnSO 4 ·7H 2 O, 0.3 part of ...

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Abstract

The invention discloses a preparation method of a suspension gradient biological film, and belongs to the field of water treatment. According to the preparation method disclosed by the invention, TiO2 / PP (Polypropylene) particles can be prepared through a dispersion effect of accessories by taking PP as a carrier of TiO2, the TiO2 / PP particles are light in weight and can suspend in water; a hydrolysable coat is prepared by taking starch, polyethylene glycol and the like as raw materials, pretreatment suspension filler is prepared, gradient coating is carried out, the pretreatment suspension filler in different coating areas is obtained, and the mass of the pretreatment suspension filler is in gradient relation, so that the suspension filler can be distributed in a reactor in a gradient way; along with proceeding of biofilm formation, the hydrolysable coat is gradually hydrolyzed, and reduced gravity of a biofilm system is far greater than reduction of buoyancy caused by volume reduction of the biofilm system due to coat hydrolysis, so that the biofilm system can float upwards, and a suspension gradient biofilm effect can be more obviously displayed; according to the preparation method disclosed by the invention, the problems that the micro-polluted wasterwater can not be hierarchically treated are solved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for preparing a suspended cascade biofilm. Background technique [0002] Slightly polluted water bodies generally refer to water bodies that contain many types of pollutants and complex properties, but relatively low concentrations. With the rapid development of industry and agriculture in our country, the pollutants discharged by people in the process of life and production pollute the source water quality more and more seriously, and the safety of drinking water supply has been widely valued. At present, water plants in most countries in the world use conventional flocculation, sedimentation, filtration, disinfection and other treatment processes, and conventional treatment processes mainly remove suspended solids, colloidal substances and bacteria in water. The removal efficiency of ammonia nitrogen and nitrate nitrogen is low. Therefore, the treatment tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCC02F1/725C02F3/1268C02F2305/10Y02W10/10
Inventor 郭迎庆
Owner CHANGZHOU UNIV