Preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus

A modified zeolite and advanced treatment technology, which is applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of no removal of nitrate nitrogen and phosphate, and achieve the purpose of improving adsorption capacity and expanding The effect of using a wide range of capabilities and resources

Active Publication Date: 2018-05-29
广州市创景市政工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that natural zeolite has almost no removal effect on nitrate nitrogen and phosphate, and to provide a method for preparing a modified zeolite for synchronous advanced treatment of nitrogen and phosphorus. By modifying the zeolite, the The removal rate of nitrogen and phosphorus

Method used

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  • Preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus
  • Preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus
  • Preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus

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specific Embodiment approach 1

[0026] Specific embodiment 1: This embodiment records a method for preparing a modified zeolite for synchronous advanced treatment of nitrogen and phosphorus. The method includes the following steps:

[0027] Step 1: Prepare the mixed solution A of zeolite and lanthanum chloride and sodium chloride, pulverize the zeolite into powder, and filter and wash with a vacuum pump. The solvent used for washing is water, wherein the mixed solution A of lanthanum chloride and sodium chloride The mass ratio of lanthanum chloride and sodium chloride in the medium is 50:1;

[0028] Step 2: Under alkaline conditions, immerse and shake the zeolite treated in Step 1 in a mixed solution A of lanthanum chloride and sodium chloride;

[0029] Step 3: Take out the zeolite, wash it, filter it with suction and dry it. The drying temperature is 105°C and the drying time is 1 h;

[0030] Step 4: Prepare a mixed solution B of lanthanum chloride and sodium chloride. Under alkaline conditions, put the ze...

specific Embodiment approach 2

[0036] Specific embodiment two: the preparation method of a kind of modified zeolite that is used for the synchronous deep treatment of nitrogen and phosphorus described in specific embodiment one, in step one, the mixed solution A concentration of described lanthanum chloride and sodium chloride is 5g / L.

specific Embodiment approach 3

[0037] Specific embodiment three: the preparation method of a kind of modified zeolite that is used for the synchronous advanced treatment of nitrogen and phosphorus described in specific embodiment one, in step 2, described alkaline condition is pH value=9~11, by NaOH and NaCO 3 Co-adjustment; the soaking temperature is 10-20°C, the soaking time is 12 hours, the rotating speed of the oscillation is 150rpm, and the ratio of zeolite to the mixed solution A of lanthanum chloride and sodium chloride is 1g:50mL.

[0038] Specific embodiment four: the preparation method of a kind of modified zeolite that is used for the synchronous advanced treatment of nitrogen and phosphorus described in specific embodiment one, in step four, the mixed solution B concentration of described lanthanum chloride and sodium chloride is 10g / L.

[0039] Specific embodiment five: a kind of preparation method of the modified zeolite that is used for the synchronous advanced treatment of nitrogen and pho...

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Abstract

The invention discloses a preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus, and belongs to the field of the deep treatment of sewage. The methodcomprises the following steps: preparing zeolite, lanthanum chloride and sodium chloride solution; smashing the zeolite, carrying out suction filtration, and washing; putting the zeolite into the lanthanum chloride and sodium chloride solution under an alkaline condition to be dipped and oscillated; cleaning the zeolite, carrying out the suction filtration on the zeolite, and drying at the temperature of 105 DEG C; preparing the lanthanum chloride and sodium chloride solution; putting the zeolite into the lanthanum chloride and sodium chloride solution under the alkaline condition to be dipped and oscillated; cleaning the zeolite, carrying out the suction filtration on the zeolite, and drying at the temperature of 105 DEG C; preparing the lanthanum chloride and sodium chloride solution; putting the zeolite into the lanthanum chloride and sodium chloride solution under the alkaline condition to be dipped and oscillated; moving the zeolite out of the solution, and carrying out thermal treatment on the zeolite at the temperature of 250-300 DEG C; preparing hexadecylpyridinium bromide solution; dipping and oscillating the zeolite in CPB (Bromohexadecyl Pyridine) solution; removing thezeolite out of the solution, and carrying out thermal treatment on the zeolite at the temperature of 100-200 DEG C. According to the modified zeolite disclosed by the invention, efficiency for removing nitrogen and phosphorus in water can be obviously improved.

Description

technical field [0001] The invention belongs to the field of advanced sewage treatment, and in particular relates to a preparation method of modified zeolite for synchronous advanced treatment of nitrogen and phosphorus. Background technique [0002] The secondary treatment of sewage plants generally adopts biological nitrogen and phosphorus removal processes, but it is difficult to meet the primary discharge standards and reuse standards of effluent phosphorus content less than 0.5mg / L and ammonia nitrogen content less than 5mg / L. If a second-level biological nitrogen and phosphorus removal process is added on the second-level basis, the infrastructure investment will be large, the treatment stability will be poor, and the cost will be high. At the same time, there are also problems in the coagulation and sedimentation phosphorus removal method frequently used in sewage plants. Coagulation-sedimentation method can remove phosphorus to meet the reuse standard, but consumes ...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F1/42C02F101/10C02F101/16
CPCB01J20/165C02F1/281C02F1/42C02F2101/105C02F2101/163
Inventor 王广智张璐王维业赵倩张宁陈志强赵庆良
Owner 广州市创景市政工程设计有限公司
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