In situ regeneration method for filler saturated in adsorbing phosphorus in artificial wetland

A technology of artificial wetland filling and in-situ regeneration, which is applied in the direction of chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problems of secondary pollution, damage, etc., and achieve simple operation, system regeneration and short function recovery period Effect

Inactive Publication Date: 2009-10-14
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose an in-situ regeneration method for phosphorus adsorption and saturation of artificial wetland fillers, without replacing the fillers, and solve the problem of phosphorus adsorption and saturation of artificial wetland fillers through the in-situ regeneration method, which can completely solve the artificial wetland Filler phosphorus adsorption saturation problem, and can overcome the damage and secondary pollution of the organisms formed in the constructed wetland system, especially the microbial system, by the existing replacement filler method

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] According to the method of the invention, the phosphorus adsorption function is regenerated by adopting the in-situ stripping method in the constructed wetland.

[0025] In the wetland system where the matrix (ceramsite) of the constructed wetland has reached the saturation of phosphorus adsorption, because it is a filler containing more Al and Fe, the dilute sodium hydroxide solution with a pH of 10 is selected and prepared as the eluent, and the prepared The eluent enters the wetland through the wetland water inlet system, operates according to the original operation mode (intermittent flow) of the wetland system, and performs in-situ eluting regeneration. The residence time of the eluent is 3 days, that is, the eluent is added to the constructed wetland and submerged Fill the surface, after staying for 24 hours, drain the eluting agent out of the wetland through the wetland drainage system, add new eluting agent and repeat the above operation twice. The constructed w...

Embodiment 2

[0028] According to the method of the invention, the phosphorus adsorption function is regenerated by adopting the in-situ stripping method in the constructed wetland.

[0029] In the wetland system where the matrix (gravel) of the constructed wetland has reached the saturation of phosphorus adsorption, because it is a filler containing more calcium oxides, a dilute hydrochloric acid solution with a pH of 4 is selected and prepared as the eluent, and the prepared eluent is passed through The wetland water inlet system enters the wetland, and operates the load according to the original operation mode (continuous flow) of the wetland system and performs in-situ dissolution and regeneration. The residence time of the eluent is 48 hours, and the eluent after operation is discharged from the wetland through the wetland drainage system. The constructed wetland after stripping treatment is washed 2-3 times with tap water until the pH value of the effluent from the constructed wetland ...

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PUM

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Abstract

The invention relates to an in situ regeneration method for filler saturated in adsorbing phosphorus in artificial wetland, which directly adopts desolvente to process the filler which is saturated in absorbing phosphorus by in situ solubilization regeneration, so as to lead the phosphorus adsorbed on the filler to be desorbed and discharged out of the system along with the desolvente, ensure the phosphorus of the filler to have regenerated adsorption function and restore the treatment efficiency of the artificial wetland for the phosphorus. The method of the invention comprises the steps of selection and preparation of the desolvente, in situ solubilization, post treatment, etc. The simple method is adopted to solve the problem of the adsorbed and saturated phosphorus in the artificial wetland, leads to the function of the absorbing phosphorus to be regenerated without replacing the filler, does not affect the absorption of stroma for the phosphorus, and improves the processing efficiency of the artificial wetland.

Description

technical field [0001] The present invention relates to a regeneration method suitable for phosphorus adsorption and saturation of artificial wetland fillers, in particular to a solvent eluting agent that directly performs in-situ elution to desorb the phosphorus adsorbed on the filler, thereby regenerating the filler's ability to adsorb phosphorus The method belongs to the technical field of resource and environment protection. Background technique [0002] Due to its advantages of low energy consumption and easy management, constructed wetland technology has been widely used in various sewage treatment fields, including domestic sewage, industrial wastewater, storm runoff, etc., and is currently being tried to control eutrophication of water bodies. [0003] The removal of phosphorus in constructed wetlands mainly includes the following methods: filler adsorption, microbial action, plant and algae absorption, etc. Among them, the adsorption of phosphorus by fillers is cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/04B01J20/08C02F1/28C02F1/58
Inventor 朱伟赵联芳华国芬董婵黄靖宇
Owner HOHAI UNIV
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