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Method of immobilized sludge to remove nitrogen, phosphor in eutrophication water body

A technology of eutrophication and sludge, which is applied in the direction of fixing on/in organic carriers, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of shortening the time required for treatment, and achieve The effect of easy solid-liquid separation, excellent effluent quality, and fast biochemical reaction rate

Inactive Publication Date: 2008-04-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It fixes microorganisms on the carrier to make them highly dense and maintain their biological activity. This technology is applied to environmental governance, which helps to increase the biomass in the bioreactor, facilitates the solid-liquid separation after the reaction, and shortens the processing time. Pollutants can be effectively removed, but there is no report on the application of this technology to the removal of nitrogen and phosphorus in eutrophic water bodies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The activated sludge is cultivated and domesticated in an SBR reactor using an anaerobic-aerobic alternating process;

[0031] (2) Concentrate the domesticated activated sludge to dehydrate the activated sludge as much as possible; then mix the concentrated sludge with sodium alginate solution to form a mixed solution with a sodium alginate concentration of 3.0%, and pass the mixed solution through a peristaltic pump Evenly drop 10.0% concentration of CaCl 2 In the solution, the immobilization time is 48 hours, and calcium alginate immobilized sludge pellets are obtained after calcification; the calcium alginate immobilized sludge pellets are taken out, rinsed, and refrigerated for later use;

[0032] (3) The prepared calcium alginate immobilized sludge pellets were pretreated in an anaerobic reactor for 8 hours, so that the activated sludge embedded in the pellets was denitrified and denitrified and released phosphate;

[0033] (4) Transfer the pretreated calcium ...

Embodiment 2

[0038] (1) The activated sludge is cultivated and domesticated in an SBR reactor using an anaerobic-aerobic alternating process;

[0039] (2) Concentrate the domesticated activated sludge to dehydrate the activated sludge as much as possible; then mix the concentrated sludge with sodium alginate solution to form a mixed solution with a sodium alginate concentration of 2.0%, and pass the mixed solution through a peristaltic pump Evenly drop 5.0% concentration of CaCl2 In the solution, the immobilization time is 24 hours, and calcium alginate immobilized sludge pellets are obtained after calcification; the calcium alginate immobilized sludge pellets are taken out, rinsed, and refrigerated for later use;

[0040] (3) The prepared calcium alginate immobilized sludge pellets were pretreated in an anaerobic reactor for 4 hours, so that the activated sludge embedded in the pellets was denitrified and denitrified and released phosphate;

[0041] (4) Transfer the pretreated calcium alg...

Embodiment 3

[0046] (1) The activated sludge is cultivated and domesticated in an SBR reactor using an anaerobic-aerobic alternating process;

[0047] (2) Concentrate the domesticated activated sludge to dehydrate the activated sludge as much as possible; then mix the concentrated sludge with sodium alginate solution to form a mixed solution with a sodium alginate concentration of 1.0%, and pass the mixed solution through a peristaltic pump Evenly drop 3.0% concentration of CaCl 2 In the solution, the immobilization time is 8 hours, and calcium alginate-immobilized sludge pellets are obtained after calcification; the calcium alginate-immobilized sludge pellets are taken out, rinsed, and refrigerated for later use;

[0048] (3) The prepared calcium alginate immobilized sludge pellets were pretreated in an anaerobic reactor for 2 hours, so that the activated sludge embedded in the pellets was denitrified and denitrified and released phosphate;

[0049] (4) Transfer the pretreated calcium al...

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Abstract

This invention discloses a method for removing N and P from nutrition-rich water body by fixed sludge. The method comprises: embedding and fixing acclimated sludge on a carrier by fixation technique to obtain spheres of acclimated sludge, performing pre-anaerobic treatment on the spheres, and removing N and P from nutrition-rich water body by the fixed sludge. The carrier is sodium alginate, and the embedded sludge is self- acclimated sludge with high N and P removing efficiency. The method has good N and P removing effects when treating nutrition-rich water body, and the solid-liquid separation is easy. Besides, P in the water can be recovered.

Description

1. Technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for treating nitrogen and phosphorus in eutrophic water bodies with immobilized sludge. 2. Background technology [0002] Nutrients such as nitrogen and phosphorus are the main pollutants that cause eutrophication in lakes, reservoirs and other water bodies. Lay plastics on the surface of the bottom mud, etc.), chemical methods (adding chemical agents to coagulate and settle phosphate and use chemical agents to kill algae), biological measures (using aquatic organisms to absorb and utilize nitrogen and phosphorus elements for metabolic activities to remove nitrogen in water bodies, Phosphorus nutrient method), etc. But sediment dredging is costly and cannot effectively control water eutrophication (Pu Peimin, Wang Guoxiang, Hu Chunhua, etc. Can sediment dredging control lake eutrophication. Lake Science, 2000, 12(3): 269~279) ; The maintenance tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N11/04C02F3/30C02F3/12
CPCY02W10/10
Inventor 聂荣翟建平李琴张文艺蒋鑫焱王明媚
Owner NANJING UNIV
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