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A kind of preparation method and application of porous carbon reinforced microbial hanging film carrier material

A film-hanging carrier and porous carbon technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of poor mechanical strength of immobilized particles, long time for microbial film-hanging, and low microbial fixation rate and other problems, to achieve the effects of metabolic activity, strong film resistance to impact load, rich charged atoms, and improved adsorption and mechanical strength.

Active Publication Date: 2022-07-19
JIANGSU ACAD OF AGRI SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the immobilized particles formed by traditional biochar have poor mechanical strength, difficult recycling operations, and low regeneration utilization rate; and because the raw materials for preparing biochar are mostly plant straws, acidic substances are continuously decomposed during pyrolysis and calcination, and inorganic mineral components The increase of content makes the pH value of pyrolyzed biomass charcoal slightly alkaline, and the cell surface of microorganisms is negatively charged in a neutral and alkaline environment, which eventually leads to a low microbial fixation rate on the surface of biochar (Ahmad et al., 2014, Biochar asa sorbent for pollutant management in soil and water: a review.Chemosphere), resulting in a longer time for microorganisms to hang on the film (about 30d)

Method used

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  • A kind of preparation method and application of porous carbon reinforced microbial hanging film carrier material
  • A kind of preparation method and application of porous carbon reinforced microbial hanging film carrier material
  • A kind of preparation method and application of porous carbon reinforced microbial hanging film carrier material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Example 1 Preparation of Porous Carbon

[0043] 1) Put 1kg of rice straw biochar (10-20 mesh) into 10L hydrochloric acid solution of 0.1 mol / L, wash at 75℃ for 60min, wash until the eluate is neutral, and dry (drying temperature 103 ±2℃, time 4h) to obtain acidified rice straw biochar;

[0044] 2) Mix 1kg of acidified rice straw biochar, 100g of nano-montmorillonite, 100g of hydrated silicate, 50g of polyacrylamide and 300g of amino starch binder to obtain a premix;

[0045] 3) Put 0.3mol FeCl 3 ·6H 2 O, 0.1mol CaCl 2 , 0.2mol LaCl 3 ·7H 2 O is diluted with 110g solvent water and sprayed onto the surface of 100g premix, then the moisture content of the material system is adjusted to 45±2%, and then the material is transferred to the HTLAB high temperature and high pressure reactor (150℃, 6MPa, stirring speed 100r / min), carry out surface functional modification for 3 h, and obtain the surface-modified biomass charcoal;

[0046] 4) The surface-modified biomass car...

Embodiment 2

[0049] Example 2 Preparation of porous carbon microbial hanging film carrier material

[0050] In the reactors whose tops are not closed, the hanging film carrier materials (the FPB of the test group and the PB of the control group obtained in Example 1) were respectively added, and the input amount accounted for 4 / 5 of the total volume of the reactor, and activated sludge (this example) was inoculated. The medium activated sludge comes from the aerobic tank of the sewage treatment plant in Jingkou District, Zhenjiang, and the MLSS of the activated sludge is 5500 mg / L. In the specific implementation, aerobic activated sludge from other sources can also be used).

[0051] The dosage is 15g dry weight sludge per liter of porous carbon material. The porous carbon material is immersed in the activated sludge, injected into the reactor from the top through the nozzle, and the remaining activated sludge flowing out from the bottom is collected, introduced into the recovery tank, and ...

Embodiment 3

[0059] Example 3 Porous carbon hanging film carrier material acclimation of phosphorus-accumulating bacteria and nitrogen and phosphorus removal test in water

[0060]Take aquaculture wastewater as the test sewage, take 100 mL of aquaculture wastewater solution (ammonia nitrogen content is 20 mg / L, TP content is 10 mg / L), placed in a 150 mL conical flask, and 0.2 g of M obtained in Example 3 was added. -FPB (film hanging for 36h), acclimated for 14d at room temperature, 100mL solution of the same solute concentration was added to the system on the 2nd, 4th, 8th and 14th day, respectively, and the changes of ammonia nitrogen and TP content in the system solution were measured for different days. The test results are as follows Figure 4 shown.

[0061] The domestication refers to the enrichment and domestication of phosphorus-accumulating bacteria by using a conventional anaerobic-aerobic alternating environment (see the literature "Li Wei, Sun Huizhi, Wei Wei, et al. 2019, Dom...

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Abstract

The invention discloses a method for preparing a porous carbon-strengthened microbial film-hanging carrier material, which specifically comprises the following steps: after mixing acidified biomass carbon, nano-inorganic materials, polyacrylamide and amino starch binder, spraying a reaction medium to perform surface function Modified granulation and carbonization to obtain porous carbon; the porous carbon is immersed in activated sludge, and the method of continuous circulating supply of activated sludge is used to form a film, that is, a carrier material for microbial film hanging is obtained, which can be applied to nitrogen in water. Removal of phosphorus; In this application, the reaction medium iron, calcium, lanthanum salts, etc. are penetrated into the molecules of the premixed material through high temperature and high pressure impregnation, and the inner and outer surfaces of the porous carbon after calcination and carbonization are formed and loaded with metal colloidal nano-oxides, which strengthens the porous carbon. The adsorption active sites and the adsorption capacity of nitrogen and phosphorus pollutants, in conjunction with the porous structure of the biochar itself, can complete the biofilm requirements on the surface of the carrier within 36-48 hours, and accelerate the subsequent acclimation time of active microorganisms.

Description

technical field [0001] The invention belongs to the technical field of environmental remediation functional adsorption materials and the related fields of application of microbial film hanging materials, and in particular relates to a preparation method and application of a porous carbon reinforced microbial film hanging carrier material. Background technique [0002] The deep denitrification and phosphorus removal of sewage has become one of the important ways to curb the eutrophication of water bodies. At present, the biological method is still the core of sewage treatment. The mature biological sewage treatment processes at home and abroad mainly include activated sludge and biofilm method. Among them, the biofilm method has developed in recent years due to its advantages of strong shock load resistance and stable operation. fast. [0003] The microbial carrier filler is the core of the biofilm process, and its performance affects the film-forming effect of microorganism...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C02F3/34
CPCC02F3/34C02F3/105C02F3/109C02F3/104Y02W10/10
Inventor 孙恩惠成亮黄红英张晶曲萍雍宬徐跃定
Owner JIANGSU ACAD OF AGRI SCI
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