Phosphorous-removing lytag as well as preparation method and application thereof

A technology for fly ash ceramsite and fly ash, which can be used in applications, other household appliances, chemical instruments and methods, etc., can solve the problems of limited improvement of removal effect, reduce the use of natural minerals, reduce operation and maintenance costs, Small secondary pollution effect

Active Publication Date: 2012-07-18
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic sewage treatment effluent standards have been improved, and the requirements for denitrification and phosphorus removal of wastewate...

Method used

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  • Phosphorous-removing lytag as well as preparation method and application thereof
  • Phosphorous-removing lytag as well as preparation method and application thereof
  • Phosphorous-removing lytag as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: figure 1 It is a flow chart of the preparation steps of phosphorus removal fly ash ceramsite, and the specific process of preparing phosphorus removal fly ash ceramsite according to this process is as follows:

[0025] (1) Mixing: according to the fineness of 200 mesh fly ash (Nanhai Power Plant, Foshan City, Guangdong Province) is 50%, bentonite (provided by Guangzhou Xinxin Chemical Operation Department) is 35%, slaked lime is 10%, and tap water is 5%. Proportion by mass percentage After weighing the raw materials respectively, mix and stir evenly to obtain the mixed raw materials.

[0026] (2) Granulation: Add the mixed raw materials into the disc granulator (Pingxiang Jinfeng Industrial Co., Ltd.) in stages. The rotating speed of the disc granulator is 30rpm during granulation. Use a sprayer to spray atomized tap water (50ml each time) and granulate, and then add material and water for the next time after an interval of 5-10 minutes until the granulation...

Embodiment 2

[0032] Example 2: Phosphorus removal effect when fly ash ceramsite is used as phosphate remover

[0033] With the phosphorus-removing fly ash ceramsite and water treatment ceramsite commodity (with the water treatment ceramsite commodity in embodiment 1, the same below) prepared by embodiment 1, carry out phosphate depletion respectively in self-prepared rich phosphate waste water Remove experiments. The experimental process is as follows:

[0034]Dissolve potassium dihydrogen phosphate in deionized water to prepare a stock solution with a concentration of 50mg / L. Take a certain amount and dilute it to 10mg / L for use in the experiment. Take 50mL and pour it into a 100mL Erlenmeyer flask. The pH is the natural value (about 7.0) , Weigh 1.00g of phosphorus removal fly ash ceramsite or water treatment ceramsite, put it into the bottle, plug the lid tightly and put it into a constant temperature oscillator. Set the oscillation conditions as follows: temperature 25°C, oscillation ...

Embodiment 3

[0036] Example 3: Experimental research on using the phosphorus removal fly ash ceramsite prepared in Example 1 to strengthen phosphorus removal in constructed wetlands

[0037] Construction of constructed wetlands for phosphorus removal Experimental research on the use of fly ash ceramsite to strengthen phosphorus removal in constructed wetlands. Constructed wetland is a vertical flow crushed stone bed constructed wetland. The purpose is to carry out advanced treatment of the effluent discharge water quality after secondary treatment, and improve the effluent water quality to the first-level A standard, that is, the total phosphorus concentration is 0.5mg / L, and the ammonia nitrogen concentration is 0.5mg / L. 5mg / L or less.

[0038] The overall dimension of the constructed wetland is: 2700×1000×700 (mm). Separate it with a waterproof partition (PVC board, the thickness can be ignored), and divide it into two grids. The size of each grid is: 2700×500×700 (mm), and the water di...

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Abstract

The invention belongs to the technical field of water pollution control and discloses phosphorous-removing lytag as well as a preparation method and application thereof. The phosphorous-removing lytag is composed of the following components in percentage by mass: 50% of fly ash, 35% of bentonite, 10% of slaked lime and 5% of tap water. The preparation method comprises the following steps of: (1) mixing raw materials; (2) granulating; (3) drying; and (4) sintering in a high-temperature muffle furnace. According to the preparation method, fly ash which is power plant solid waste is used as a main raw material so that the use of natural minerals such as clay and shale is greatly reduced, and a new way is provided for properly treating solid waste; and the phosphorous-removing lytag has a good phosphorous-removing effect; the bulk density is 877 kg/m<3>, the bulk density is 1509 kg/m<3>, the air porosity is 41.9%, the cylinder pressure strength is 6.94 MPa and the hydrochloric acid solubility is 2.3%; and the phosphorous-removing lytag has obvious practical applicability and performance advantages.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a novel high-efficiency and high-strength dephosphorization fly ash ceramsite and its preparation method and application. Background technique [0002] Water treatment ceramsite is a kind of environmental functional material that is more and more widely used in sewage treatment. At present, it is mainly used as filler in wastewater treatment projects such as biological aerated filters, artificial wetlands and water treatment dams. It is the above-mentioned wastewater treatment The core material of engineering. Most of the appearance characteristics of ceramsite are round or elliptical spheres. The particle size of ceramsite used for water pollution control is generally 5-20mm. It has the basic characteristics of rough surface, high strength, light weight and porous inner and outer surfaces. It can withstand long-term high-load hydraulic impact, and ca...

Claims

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Application Information

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IPC IPC(8): C04B33/13C02F3/00
Inventor 谌建宇罗隽罗沛聪骆其金庞志华
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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