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Nitrogen and phosphorus removal composite adsorption material and preparation method thereof

A composite adsorption material and a technology for denitrification and phosphorus removal, which are applied in the field of composite adsorption materials for denitrification and phosphorus removal and the field of preparation thereof, can solve problems such as large energy consumption, and achieve reduced carbon pollution, good removal effect and low preparation cost. Effect

Inactive Publication Date: 2019-04-19
河南永泽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although water supply sludge is currently classified as non-polluting solid waste, its huge output still poses challenges and energy consumption for subsequent treatment and disposal
At present, landfilling after concentration and dehydration is the general treatment and disposal method for water supply sludge. This process often consumes a large part of energy, and the increasingly stringent disposal standards are a huge challenge for water supply plants.

Method used

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  • Nitrogen and phosphorus removal composite adsorption material and preparation method thereof
  • Nitrogen and phosphorus removal composite adsorption material and preparation method thereof
  • Nitrogen and phosphorus removal composite adsorption material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The invention provides a composite adsorption material for denitrification and phosphorus removal. The composite adsorption material is prepared from pomelo peel, iron rust, waste hydrochloric acid and aluminum sludge.

[0030] A preparation method for a composite adsorption material for nitrogen and phosphorus removal, comprising the steps of:

[0031] (1) Aluminum sludge pretreatment: dehydrate the aluminum sludge, air-dry it to reduce the moisture content to below 40wt%, and then place it in an oven at 105°C for further drying for 8 hours, grind it into fine powder, and sieve through a 100-mesh sieve.

[0032] (2) Pretreatment of grapefruit peel: air-dry grapefruit peel, crush it into a ceramic crucible, compact it lightly, cover it, put it in a muffle furnace, keep it at 400°C for 3.5 hours, and wait for the muffle Cool in the furnace to room temperature, take out the carbonized pomelo peel, grind and sieve to 100 mesh, set aside.

[0033] (3) Preparation of modifi...

Embodiment 2

[0038] The difference between this embodiment and Example 1 is that the carbonized pomelo peel, iron rust, waste hydrochloric acid and deionized water are mixed in a ratio of 1kg: 1.2g: 6g: 20L, and Fe in the iron rust 2 o 3 The content of HCl is 91%, the content of HCl in waste hydrochloric acid is 19%, and the mass fraction of aluminum element in aluminum sludge is 11%.

[0039] The same test method as in Example 1 was used to measure the total phosphorus removal rate of the composite adsorbent material prepared in this example to be 97%, the total nitrogen removal rate to be 78%, and the ammonia nitrogen removal rate to be 90%.

Embodiment 3

[0041] The carbonized pomelo peel, iron rust, waste hydrochloric acid and deionized water are mixed in the ratio of 1kg: 1.5g: 7g: 20L, and Fe in the iron rust 2 o 3 The content of HCl is 92.5%, the content of HCl in waste hydrochloric acid is 23%, and the mass fraction of aluminum element in aluminum sludge is 12%.

[0042] The same test method as in Example 1 was used to measure the removal rate of total phosphorus, 78% of total nitrogen and 88% of ammonia nitrogen of the composite adsorbent material prepared in this example.

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Abstract

The invention discloses a nitrogen and phosphorus removal load adsorption material and a preparation method thereof, and belongs to the technical field of water treatment. The preparation method comprises the following steps that waste grapefruit peel obtained after eating or processing of grapefruits is pretreated, the pretreated grapefruit peel is modified by using iron rust in an iron and steelplant and an industrial by-product, namely waste hydrochloric acid, and modified biochar is prepared; aluminum sludge in a coagulation tank of a tap water plant is pretreated, and the aluminum sludgeand the modified biochar are prepared into a composite adsorbent through a hydrothermal synthesis method. The grapefruit peel, the iron rust, the waste hydrochloric acid and the aluminum sludge are prepared into the composite adsorption material, the waste is turned into wealth, the production process is simple, the operation is easy, the production cost is low, no harmful substance is generated,the surface of the prepared composite adsorption material is loose and porous, pollutants such as nitrogen and phosphorus in water can be removed, and the material has good large-scale production andapplication prospects.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite adsorption material for nitrogen and phosphorus removal and a preparation method thereof. Background technique [0002] Both nitrogen and phosphorus are essential elements for the growth of animals and plants, and one of the constituent elements of protein, which is of great significance to human beings. However, excessive nitrogen and phosphorus elements will have a negative impact on the growth of animals and plants. For example, if the content of nitrogen and phosphorus in the water is too high, it will cause eutrophication of the water body, causing pollution phenomena such as "red tide" or "water bloom". In order to effectively curb the trend of water eutrophication, many countries and regions have introduced strict nitrogen and phosphorus discharge standards. [0003] Grapefruit is one of the main fruits in southern my country, with an annual output o...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/10C02F101/16
CPCB01J20/02B01J20/0248B01J20/06B01J20/20C02F1/281C02F1/283C02F2101/105C02F2101/16
Inventor 朱丽莎王彦堂刘畅
Owner 河南永泽环境科技有限公司
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