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A kind of biological regeneration method of adsorbent

A biological regeneration and adsorbent technology, applied in the biological field, can solve the problems such as failure to recycle phosphorus resources, easy blockage of adsorbent pores, affecting regeneration effect, etc., and achieve the effects of low cost, easy separation and high regeneration efficiency.

Active Publication Date: 2021-01-08
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorbents are mostly regenerated by physical and chemical methods, and the cost of regeneration is high. Improper disposal of regeneration solution can easily lead to secondary pollution, and phosphorus resources have not been recycled. Biological regeneration technology is expected to solve the problem of secondary pollution caused by physical and chemical regeneration.
However, the bacteria used in traditional biological regeneration need to provide organic carbon during the regeneration process, which is costly, and organic matter and bacteria are easy to block the pores of the adsorbent, thus affecting the regeneration effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First filter out and dry the strongly basic anion exchange resin D201-P that is saturated with phosphorus-containing wastewater and wait for regeneration;

[0018] Add Chlorella that reached the logarithmic growth phase after cultivating for 5 days in the f / 2 culture medium, and the algae cell concentration was 10 8 cell / L, the algal suspension obtained by centrifugation;

[0019] Add the above-mentioned algae suspension to the f / 2 culture solution, adjust the pH value to 7, the salinity to 0mol / L (calculated as NaCl) by using a small amount of NaOH and HCl, and supplement the exogenous substance N to reach a concentration of 7.5%, so as to obtain the regenerated algae liquid;

[0020] Add 0.2g of the above-mentioned D201-P exchange resin to 50mL of regenerated algae liquid, and after 5 days of regeneration, take out the regenerated exchange resin, wash and dry it, and put it into 100mL of 400mg / L KH 2 PO 4 Phosphorus is reabsorbed in the solution, and the regenerati...

Embodiment 2

[0022] First filter out the weakly basic anion exchange resin D301-P which is saturated with adsorption and saturation in phosphorus-containing wastewater, and then filter out and dry to be regenerated;

[0023] Add Chlorella that reached the logarithmic growth phase after cultivating for 5 days in the f / 2 culture medium, and the algae cell concentration was 10 8 cell / L, the algal suspension obtained by centrifugation;

[0024] Add the above-mentioned algae suspension to the f / 2 culture medium, adjust the pH value to 7, the salinity to 0.6mol / L (calculated as NaCl) by using a small amount of NaOH and HCl, and supplement the exogenous substance N to reach a concentration of 7.5%, so as to obtain regeneration algae liquid;

[0025] Add 0.2g of the above-mentioned D301-P exchange resin to 50mL of regenerated algae liquid, and after 5 days of regeneration, take out the regenerated exchange resin, wash and dry it, and put it into 100mL of 400mg / L KH 2 PO 4 Phosphorus is reabsorb...

Embodiment 3

[0027] First filter out and dry the strongly basic anion exchange resin D201-P that is saturated with phosphorus-containing wastewater and wait for regeneration;

[0028] Add Chlorella that reached the logarithmic growth phase after culturing for 6 days in the f / 2 culture medium, and the concentration of algae cells was 10 8 cell / L, the algal suspension obtained by centrifugation;

[0029] Add the above-mentioned algal suspension to the f / 2 culture medium, adjust the pH value to 8, the salinity to 0.1mol / L (calculated as NaCl) with a small amount of NaOH and HCl, and supplement the exogenous substance N to a concentration of 2.5%, to obtain regeneration algae liquid;

[0030] Add 0.2g of the above-mentioned D201-P exchange resin to 1000mL of regenerated algae liquid. After regeneration for 3 days, take out the regenerated exchange resin, wash and dry it, and then put it into 100mL of 400mg / L KH 2 PO 4 Phosphorus is reabsorbed in the solution, and the regeneration efficiency...

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PUM

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Abstract

The invention discloses a biological regeneration method of an adsorbent. The biological regeneration method mainly comprises the following steps of firstly filtering out phosphorus-containing wastewater treating adsorption-saturated strongly basic anion exchange resin D201-P and weakly basic anion exchange resin D301-P respectively, and oven-drying for later regeneration; culturing a chlorella byusing an f / 2 culture solution, and centrifuging to obtain chlorella suspension liquid after reaching a logarithmic growth period; adding the chlorella suspension liquid into the f / 2 culture solution,regulating a pH (potential of Hydrogen) value to 6.5 to 8.5 and salinity to 0mol / L to 0.6mol / L (metered by NaCl) and supplementing an exogenous substance N whose final concentration is 2.5 to 12.5 percent, so as to obtain regeneration chlorella liquid; according to a proportion that 0.1g of the exchange resin is thrown into the regeneration chlorella liquid per 25mL to 500mL, putting the exchangeresin D201-P and D301-P into the regeneration chlorella liquid, regenerating for 3 to 5 days, then taking out the well regenerated exchange resin, cleanly washing and oven-drying for later recycling.The biological regeneration method is simple in process, lower in cost and high in regeneration efficiency, and has no secondary pollution, and phosphorus can be biologically utilized while the absorbent is regenerated.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a biological regeneration method of an adsorbent. Background technique [0002] At present, the adsorption method is widely used in phosphorus removal because of its high efficiency and stability, but the regeneration technology of the adsorbent has become a scientific problem restricting its application. Adsorbents are mostly regenerated by physical and chemical methods, and the cost of regeneration is high. Improper disposal of regeneration solution can easily lead to secondary pollution, and phosphorus resources have not been recycled. Biological regeneration technology is expected to solve the problem of secondary pollution caused by physical and chemical regeneration. . However, the bacteria used in traditional biological regeneration need to provide organic carbon during the regeneration process, which is costly, and organic matter and bacteria are easy to block th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J49/57
CPCB01J49/57
Inventor 王素凤王鑫付明伟刘珊珊邵光杰
Owner YANSHAN UNIV
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