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Dephosphorization agent and its preparation method and application

A phosphorus removal agent and red brick technology, applied in the field of construction waste resource utilization, can solve the problems of phosphorus removal agent biochemical system toxicity, high cost, limited phosphorus removal effect, etc., achieve environmental protection benefits, reduce treatment costs, excellent removal The effect of phosphorus effect

Active Publication Date: 2021-04-30
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially for the technical problems of the existing large-tonnage domestic sewage with limited dephosphorization effect, high cost, and the dephosphorization agent is highly toxic to the biochemical system, and provides a dephosphorization Phosphorus removal agent with good effect, can greatly reduce phosphorus removal cost, can effectively utilize waste resource construction waste and save energy, is friendly to the ecological environment, and has a relatively simple preparation process, and its preparation method and application

Method used

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  • Dephosphorization agent and its preparation method and application
  • Dephosphorization agent and its preparation method and application

Examples

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Embodiment 1

[0041] A kind of dephosphorization agent of the present invention, mainly with construction waste as raw material, is prepared by acid modification, high-temperature calcination activation and adding soluble sodium salt stirring, and construction waste is cement waste and red brick waste, and the temperature of high-temperature calcination activation is 900°C.

[0042] In this embodiment, the mass ratio of red brick dust to cement dust is 1:2.

[0043] A kind of preparation method of the phosphorus removal agent of above-mentioned present embodiment, comprises the following steps:

[0044] (1) Pretreatment of the base material: respectively air-dry the construction waste red brick waste and cement waste, grind them with a ball mill, and pass through a 200-mesh sieve to obtain red brick ash and cement ash.

[0045] (2) Batching: Red brick ash and cement ash are batched and mixed according to the mass ratio of 1:2 to obtain the material to be treated, that is, the mixed materia...

Embodiment 2

[0065] A preparation method of the phosphorus removal agent of the present invention is basically the same as that of Example 1, except that in step (4), the calcination temperature is 700° C. and the calcination time is 10 min.

[0066] 0.08mL / L phosphorus removal agent prepared in this embodiment is dropped into 500mL with KH 2 PO 4 In the simulated phosphorus-containing wastewater with an initial phosphorus concentration of 5mg / L (in terms of P mass concentration), stir and react at a stirring rate of 120r / min for 10min at room temperature, add a flocculant to precipitate for 30min, and conduct phosphorus in the water. The phosphorus element in the treated water was detected, and the results showed that the phosphorus removal efficiency was 97.89%.

Embodiment 3

[0068] A preparation method of the dephosphorization agent of the present invention is basically the same as in Example 1, the only difference being: in step (1), the mass ratio of red brick ash and cement ash is 2: 1; in step (3), stirring The temperature was 108°C.

[0069] 0.08mL / L phosphorus removal agent prepared in this embodiment is dropped into 500mL with KH 2 PO 4 The configured initial phosphorus concentration is 5mg / L (in terms of P mass concentration) in the phosphorus-containing wastewater simulation liquid, stirred and reacted at a stirring rate of 120r / min at room temperature for 10 minutes, and added flocculant for precipitation for 30 minutes to remove phosphorus in the water body , the phosphorus element in the treated water was detected, and the results showed that the phosphorus removal efficiency was 99.25%.

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Abstract

The invention discloses a dephosphorization agent and its preparation method and application. The dephosphorization agent is mainly prepared from red brick waste and / or cement waste through acid modification, high-temperature calcination activation and sodium salt stirring. The temperature for high-temperature calcination activation is 700°C to 1000°C. The preparation method includes pretreatment, batching, acid modification, calcining and stirring with sodium salt. The phosphorus removal agent has good phosphorus removal effect, can utilize construction waste as resources, and has a simple preparation process. The phosphorus removal agent of the present invention is mainly used for advanced treatment of large-tonnage domestic sewage, can greatly reduce the cost, is friendly to the ecological environment, can effectively save energy, and has important economic benefits and social significance.

Description

technical field [0001] The invention belongs to the technical field of utilization of construction waste resources, and relates to a phosphorus removal agent and its preparation method and application, in particular to a construction waste-based phosphorus removal agent, its preparation method and its application for advanced treatment of large-tonnage domestic sewage. Background technique [0002] With the acceleration of industrialization and urbanization in China, the construction industry has also been promoted. While the construction industry provides work and rest space for production and living, it produces a lot of construction waste. Judging from the current status quo, more than one-third of urban waste is construction waste, and the proportion of occupied space is increasing. If the construction waste is not effectively disposed of after the completion of the project, not only will more land be wasted, but also unpredictable pollution will be brought to the city....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/54C02F1/52C02F101/10
CPCC02F1/5236C02F1/54C02F1/58C02F2101/105
Inventor 王劲曦蒋晓云谷季凌胡兵李明亮
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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