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Water supply plant sludge-based phosphorus removal particle adsorbent preparation method

A technology for sludge and granular adsorbents in water supply plants, applied in the field of water treatment, can solve problems such as affecting the adsorption effect of sludge in water supply plants, difficulty in recycling and restricting the widespread use of sludge in water supply plants, etc. The effect of waste recycling, economical and fast

Inactive Publication Date: 2017-03-29
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sludge from water supply plants is usually used as a phosphorus removal adsorbent in the form of powder or ceramsite, which is difficult to recycle; and ceramsite sludge is mixed with a large amount of auxiliary materials during the granulation process. To a certain extent, it affects the adsorption effect of sludge in water supply plants
These shortcomings limit the widespread use of sludge from water supply plants. Therefore, the preparation of high-efficiency phosphorus removal sludge particles from water supply plants will become an inevitable trend of sludge utilization in the future.

Method used

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  • Water supply plant sludge-based phosphorus removal particle adsorbent preparation method
  • Water supply plant sludge-based phosphorus removal particle adsorbent preparation method
  • Water supply plant sludge-based phosphorus removal particle adsorbent preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Using feedwater sludge to prepare phosphorus removal adsorption particles includes the following steps:

[0033] (1) The sludge from the water supply plant is naturally dried, crushed and sieved to make the particle size ≤125μm;

[0034] (2) Prepare 100 mL of 0.5% sodium alginate solution and 250 mL of 4% calcium chloride solution respectively;

[0035] (3) Add 10g of sludge from the water supply plant to the 0.5% sodium alginate solution and mix well;

[0036] (4) Use a dropper to drop the mixture in step (3) dropwise into the calcium chloride solution in step (2) to obtain feedwater sludge gel pellets, which are allowed to stand and solidify at 25°C for 8 hours;

[0037] (5) Filter out the solidified feedwater sludge gel ball, rinse repeatedly with deionized water, and bake at 85°C for 24h to obtain feedwater sludge particles. Example 2:

Embodiment 2

[0038] Using feedwater sludge to prepare phosphorus removal adsorption particles includes the following steps:

[0039] (1) The sludge from the water supply plant is naturally dried, crushed and sieved to make the particle size ≤125μm;

[0040] (2) Prepare 100 mL of 1% sodium alginate solution and 250 mL of 4% calcium chloride solution respectively;

[0041] (3) Add 10g of sludge from the water supply plant to the 1% sodium alginate solution and mix well;

[0042] (4) Use a dropper to drop the mixture in step (3) dropwise into the calcium chloride solution in step (2) to obtain feedwater sludge gel pellets, which are allowed to stand and solidify at 25°C for 8 hours;

[0043] (5) Filter out the solidified feedwater sludge gel ball, rinse repeatedly with deionized water, and bake at 85°C for 24h to obtain feedwater sludge particles. Example 3:

Embodiment 3

[0044] Using feedwater sludge to prepare phosphorus removal adsorption particles includes the following steps:

[0045] (1) The sludge from the water supply plant is naturally dried, crushed and sieved to make the particle size ≤125μm;

[0046] (2) Prepare 100 mL of 2% sodium alginate solution and 250 mL of 5% calcium chloride solution respectively;

[0047] (3) Add 10g of sludge from the water supply plant to the 2% sodium alginate solution and mix well;

[0048] (4) Use a dropper to drop the mixture in step (3) dropwise into the calcium chloride solution in step (2) to obtain feedwater sludge gel pellets, which are allowed to stand and solidify at 25°C for 8 hours;

[0049] (5) Filter out the solidified feedwater sludge gel ball, rinse repeatedly with deionized water, and bake at 85°C for 24h to obtain feedwater sludge particles. Example 4:

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Abstract

The present invention belongs to the field of water treatment, and particularly relates to a water supply plant sludge-based phosphorus removal particle adsorbent preparation method, which specifically comprises: drying water supply plant sludge, breaking, screening, uniformly mixing the screened sludge and a sodium alginate solution, adding to a calcium chloride solution in a dropwise manner to form small balls, and carrying out curing drying to form the water supply plant sludge particles, wherein the phosphorus in wastewater can be effectively removed by using the water supply plant sludge particles in phosphorus-containing wastewater treatment, and the adsorption capacity is up to 44 mg / g. According to the present invention, the water supply plant sludge adsorption capacity is maintained while the water supply plant sludge particles having the good performance are produced, such that the resource of the waste is achieved, and the good economic and environmental benefits are provided.

Description

Technical field [0001] The invention belongs to the field of water treatment, and specifically relates to a preparation method of a sludge-based phosphorus removal granular adsorbent for water supply plants. Background technique [0002] In recent years, the eutrophication of water bodies has become increasingly serious. More than half of the lakes in my country are in a state of eutrophication, and some of them have reached a state of severe eutrophication. The comprehensive sewage discharge standard (GB8978-1996) stipulates that the phosphorus content in discharged sewage should be less than 0.3mg / L, and the effective removal of phosphorus in water bodies has become an urgent problem to be solved. At present, commonly used methods for phosphorus removal include chemical, biological and adsorption methods. The chemical method is highly efficient, but the addition of chemical agents may cause secondary pollution and greatly increase investment costs. Biological method has low c...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F1/58
CPCB01J20/08B01J20/28019C02F1/281
Inventor 裴元生李秀青
Owner BEIJING NORMAL UNIVERSITY
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