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Preparation method and application of porous carbon reinforced microbial biofilm culturing carrier material

A film-hanging carrier and porous carbon technology, which is 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 difficult recovery operations. and other problems, to achieve the effect of enriching charged atoms, promoting homogeneous nucleation and granulation, improving adsorption and mechanical strength

Active Publication Date: 2020-11-06
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method and application of porous carbon reinforced microbial biofilm culturing carrier material
  • Preparation method and application of porous carbon reinforced microbial biofilm culturing carrier material
  • Preparation method and application of porous carbon reinforced microbial biofilm culturing carrier material

Examples

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Embodiment 1

[0042] The preparation of embodiment 1 porous carbon

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

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

[0045] 3) Add 0.3mol of FeCl 3 ·6H 2 O, 0.1mol of CaCl 2 , 0.2mol of LaCl 3 ·7H 2 O is diluted with 110g of solvent water and sprayed onto the surface of 100g of the premixed material, 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°C, 6MPa, stirring speed 100r / min), carry out surface functional modification for 3 hours, and obtain surface-modified biochar;

...

Embodiment 2

[0049] The preparation of embodiment 2 porous charcoal microorganism hanging film carrier material

[0050] Add film-hanging carrier materials (the test group FPB obtained in Example 1, the control group PB) in the reactors whose tops are not closed, and the input amount accounts for 4 / 5 of the total volume of the reactor, and the activated sludge (this example The medium activated sludge comes from the aerobic pool of Zhenjiang Jingkou District Sewage Treatment Plant, and the MLSS of activated sludge is 5500mg / L. In specific implementation, aerobic activated sludge from other sources can also be used).

[0051] The dosage is 15g of 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 passed through the pressure The water pump is circulated...

Embodiment 3

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

[0060]Take aquaculture wastewater as test sewage, take 100 mL of aquaculture wastewater solution (ammonia nitrogen content is 20 mg / L, TP content is 10 mg / L), put it in a 150 mL Erlenmeyer flask, add 0.2 g of M -FPB (membrane-hanging 36h), acclimatization at room temperature for 14 days, adding 100mL solution of the same solute concentration to the system on the 2nd, 4th, 8th, and 14th day respectively, and measuring the changes of ammonia nitrogen and TP content in the system solution at 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 the conventional construction of anaerobic-aerobic alternating environment (see the literature "Li Wei, Sun Huizhi, Wei Wei, etc. 2019, the domesticati...

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Abstract

The invention discloses a preparation method of a porous carbon reinforced microbial biofilm culturing carrier material. The preparation method specifically comprises the following steps: mixing acidified biomass charcoal, a nano inorganic material, polyacrylamide and an amino starch adhesive, spraying a reaction medium, carrying out surface functional modification granulation, and carbonizing toobtain porous carbon; immersing porous carbon in activated sludge, and carrying out biofilm formation by adopting a continuous cyclic activated sludge supply method to obtain the microbial biofilm formation carrier material which can be applied to removal of nitrogen and phosphorus in a water body. Reaction media such as iron, calcium, lanthanum salt and the like permeate into premixed material molecules through high-temperature and high-pressure impregnation; metal colloid nanometer oxide is generated and loaded on the inner surface and the outer surface of the calcined and carbonized porouscarbon so that the adsorption active sites of the porous carbon and the adsorption capacity of nitrogen and phosphorus pollutants are enhanced, the requirement of biological coating on the surface ofthe carrier can be met within 36-48h in cooperation with the porous structure on the surface of the biochar, and the domestication time of subsequent active microorganisms is shortened.

Description

technical field [0001] The invention belongs to the technical field of environmental restoration functional adsorption materials and the related field of application of microbial film-hanging materials, and in particular relates to a preparation method and application of a porous carbon-enhanced microbial film-hanging carrier material. Background technique [0002] The deep nitrogen 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 been developed in recent years due to its strong impact load resistance and stable operation. fast. [0003] Microbial carrier filler is the core of biofilm technology, and its performance affects the effect of microorganisms on the film, the biomass in the re...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/10
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 ACADEMY OF AGRICULTURAL SCIENCES
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