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Preparation method and application of wet plant fiber filler for strengthening artificial wetland denitrification

A plant fiber, constructed wetland technology, applied in chemical instruments and methods, biological water/sewage treatment, other chemical processes, etc., can solve the problems of effluent SS exceeding the standard, COD exceeding the standard, loss and other problems, achieving a simple preparation method and improving denitrification. The effect of efficiency

Active Publication Date: 2021-08-20
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to supplement the carbon source of the constructed wetland, natural, cellulose-rich solid substances can be used as matrix materials, such as wood chips, rice husks, cattails, reed poles, etc.; the invention patent with the publication number CN101525184A discloses a constructed wetland The supplementary method of organic carbon source is to add organic carbon source directly to the constructed wetland by chopping one or several kinds of branches, wood chips or plant stalks into the size of filler particles, although this method can improve the quality of constructed wetland to a certain extent. However, since the plant fiber powder directly buried in the constructed wetland will flow out with the water, on the one hand, the loss of the carbon source supplemented by the constructed wetland will lead to poor denitrification efficiency, and on the other hand, it will cause the SS in the effluent to exceed the standard , in addition, the concentrated degradation of the directly buried plant fiber powder in the later stage will also cause the COD in the effluent to exceed the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of wet plant fiber filler for strengthening artificial wetland denitrification, comprising the following steps:

[0028] (1) Take the wet plant canna harvested in the artificial wetland, wash it, dry it at 60° C., and pass it through a 100-mesh sieve after pulverizing with a pulverizer to obtain canna fiber powder;

[0029] (2) After mixing the canna fiber powder and sodium alginate at a mass ratio of 1:0.5, add 0.05L of distilled water per gram of the mixture, then heat in a water bath at 60°C and stir evenly to form alginic acid containing canna fiber Sodium solution; then the solution is dropped into the calcium chloride solution of 1% by mass fraction at a speed of 30 drops / min, and the prepared water-containing fiber microspheres are freeze-dried to obtain dry porous canna fiber fillers;

[0030] (3) Put the porous canna fiber filler prepared in step (2) into fresh activated sludge mixture, add glucose, ammonium chloride, dihydrogen phosphate b...

Embodiment 2

[0033] A preparation method of wet plant fiber filler for strengthening artificial wetland denitrification, comprising the following steps:

[0034] (1) Take the wet plant reed harvested in the artificial wetland, wash it, dry it at 60° C., crush it with a pulverizer and pass it through a 100-mesh sieve to obtain a reed fiber powder;

[0035] (2) After mixing the reed fiber powder and sodium alginate uniformly at a mass ratio of 1:0.5, add 0.05L of distilled water per gram of the mixture, then heat in a water bath at 60°C and stir evenly to form sodium alginate containing reed fibers solution; then drop the solution into a calcium chloride solution with a mass fraction of 1% at a rate of 30 drops / min, and freeze-dry the prepared water-containing fiber microspheres to obtain dry and porous reed fiber fillers;

[0036] (3) Put the porous reed fiber filler prepared in step (2) into fresh activated sludge mixed solution, add glucose, ammonium chloride, dihydrogen phosphate by C:N:...

Embodiment 3

[0039] A preparation method of wet plant fiber filler for strengthening artificial wetland denitrification, comprising the following steps:

[0040] (1) Take the wet plant Acorus calamus harvested in the artificial wetland, wash it, dry it at 60° C., and pass it through a 300-mesh sieve after pulverizing with a pulverizer to obtain calamus fiber powder;

[0041] (2) After mixing calamus fiber powder and sodium alginate at a mass ratio of 1:0.1, add 0.1L of distilled water per gram of the mixture, then heat in a water bath at 30°C and stir evenly to form sodium alginate containing calamus fiber solution; then the solution is dripped into the calcium chloride solution with a mass fraction of 3% at a speed of 25 drops / min, and the prepared water-containing fiber microspheres are freeze-dried to obtain dry and porous calamus fiber fillers;

[0042] (3) Put the porous calamus fiber filler prepared in step (2) into the fresh activated sludge mixture, add glucose, ammonium chloride, ...

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Abstract

The invention belongs to the technical field of sewage treatment. At present, most constructed wetlands have the problem of low denitrification efficiency. Aiming at the problems in the prior art, the present invention discloses a preparation method of wet plant fiber filler that strengthens the denitrification of constructed wetlands. The discarded wetland plants are used as The raw material is pulverized and then microsphered to obtain porous wet plant fiber filler, and then the microorganisms are loaded on the wet plant fiber filler by hanging film culture. The preparation method is simple, and the wet plant fiber filler prepared by the preparation method can continuously and slowly release carbon sources, greatly enhance the denitrification ability of the constructed wetland, improve the denitrification efficiency of the constructed wetland, and there will be no effluent SS exceeding the standard or The problem of COD exceeding the standard.

Description

technical field [0001] The invention relates to a preparation method and application of a wet plant fiber filler, in particular to a preparation method and application of a wet plant fiber filler for strengthening artificial wetland denitrification, and belongs to the technical field of sewage treatment. Background technique [0002] Constructed wetland is a kind of sewage ecological treatment process developed in the 1970s. It is constructed and controlled by man-made. The sewage is distributed to the artificially constructed wetland in a controlled manner. During the process of sewage flowing in a certain direction, Relying on the physical, chemical and biological triple synergy of soil or artificial media, plants and microorganisms to treat sewage. Constructed wetland has the advantages of good treatment effect, wide application, low investment, and low operation and management costs. At present, it has been widely used in sewage treatment such as domestic sewage, industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/22C02F3/32C02F3/34C02F3/28
CPCC02F3/2806C02F3/32C02F3/34
Inventor 陶敏吕继良刘浩廖泽远张丽莉肖文胜张家泉
Owner HUBEI POLYTECHNIC UNIV
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