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A kind of nitrogen and phosphorus removal ecological permeable material and preparation method thereof

A technology for permeable material, nitrogen and phosphorus removal, applied in chemical instruments and methods, biological water/sewage treatment, ceramic products, etc., can solve problems such as hardening and blockage, avoid hardening, enhance material exchange capacity, and enhance medium exchange capacity. Effect

Active Publication Date: 2022-03-08
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of hardening and clogging that occurs when pyrite is directly used as a filler, the present invention provides an ecological permeable material for nitrogen and phosphorus removal and a preparation method thereof

Method used

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  • A kind of nitrogen and phosphorus removal ecological permeable material and preparation method thereof
  • A kind of nitrogen and phosphorus removal ecological permeable material and preparation method thereof
  • A kind of nitrogen and phosphorus removal ecological permeable material and preparation method thereof

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preparation example Construction

[0042] The preparation method of a kind of denitrification and dephosphorization ecological permeable material of the present invention comprises the aggregate of 0-50 parts by weight, the pyrite of 30-80 parts, the cohesive material of 10-25 parts, 0.15 - 0.5 parts of fiber reinforcement and 4-10 parts of water are raw materials, among which the particle size range of pyrite and aggregate particles is 5-30mm, both of which are coarse particles, between the coated particles It can not only adhere to each other to form a stable skeleton structure, but also form gaps between particles as water-permeable pores; the cohesive material includes the following mass fractions: silicate cohesive material 60-90%, silica fume 5-20% , diatomite 5-20% (based on the total mass of the coagulated material as 100%); through the sequential batch method of adding raw materials, the coagulated material and fiber reinforcement can more fully and evenly wrap the aggregate and sulfur iron ore, the sp...

Embodiment 1

[0045] The mass fraction ratio of raw materials is: 40% sandstone with a particle size of 10mm-20mm, 40% pyrite with a particle size of 10mm-20mm, 10.75% cement, 2.5% silica fume, 2.5% diatomaceous earth, 4% water and 0.25% glass fiber length 3mm-10mm. Mix and stir sand, pyrite, and 1 / 2 of the total mass of the above water at a stirring speed of 60r / min and a stirring time of 60s to obtain a wet mixture; mix cement, silica fume, diatomaceous earth, and glass fiber To obtain dry powder mortar evenly, add 1 / 2 of the total amount of the above dry powder mortar into the wet mixture and stir at a stirring speed of 100r / min for 120s; mix 1 / 2 of the remaining total amount of water with the remaining 1 / 2 2 dry powder mortar is alternately added to the above mixture and stirred evenly to obtain a slow-release slurry, the stirring speed is 100r / min, and the stirring time is 200s; after the stirred slow-release slurry is poured into a module of the required size and shape, remove Mold m...

Embodiment 2

[0047] The mass fraction ratio of raw materials is: 38% sandstone with a particle size of 10mm-20mm, 38% pyrite with a particle size of 10mm-20mm, 13.75% cement, 3% silica fume, 3% diatomaceous earth, 4% water and 0.25% glass fiber length 3mm-10mm. Mix and stir sand, pyrite, and 1 / 2 of the total mass of the above water at a stirring speed of 60r / min and a stirring time of 60s to obtain a wet mixture; mix cement, silica fume, diatomaceous earth, and glass fiber To obtain dry powder mortar evenly, add 1 / 2 of the total amount of the above dry powder mortar into the wet mixture and stir at a stirring speed of 100r / min for 120s; mix 1 / 2 of the remaining total amount of water with the remaining 1 / 2 Add the dry powder mortar of 2 alternately to the above mixture and stir evenly to obtain a slow-release slurry, the stirring speed is 60r / min, and the stirring time is 200s; after the stirred slurry is poured into the module of the required size and shape, demoulding and curing Forming ...

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Abstract

The invention discloses an ecological permeable material for nitrogen and phosphorus removal and a preparation method thereof, belonging to the fields of environmental functional materials and water body purification. The ecological water-permeable material of the present invention includes a slow-release skeleton structure and water-permeable holes; the slow-release skeleton structure is composed of pyrite particles coated with a mixture of cohesive material and fiber reinforcement on the surface, and optionally includes a surface coated with The skeleton formed by the aggregate particles of the mixture of the coagulation material and the fiber reinforced ribs, the permeable holes are evenly distributed inside the slow-release skeleton structure, and the holes make the water permeability coefficient of the ecological permeable material not less than 10mm / s. The nitrogen and phosphorus removal ecological permeable material of the present invention has the characteristics of good water permeability, high molding degree, high specific surface area, high strength, and easy microbial film formation, etc., and can slowly release calcium ions and iron ions to remove phosphorus and realize autotrophic nitrogen removal. It has a good purification effect on pollutants in water bodies, especially total nitrogen and total phosphorus.

Description

technical field [0001] The invention relates to the fields of environmental functional materials and polluted water treatment, in particular to an ecological water-permeable material for nitrogen and phosphorus removal and a preparation method thereof. Background technique [0002] With the continuous acceleration of the urbanization process in our country, the pollution of water environment is becoming more and more serious. The continuous accumulation of nitrogen and phosphorus in water bodies aggravates the degree of eutrophication of water bodies and poses a great threat to the water ecosystem. Scholars at home and abroad are also constantly studying the purification technology of natural water bodies, which can be roughly divided into three types: physical method, biological method and chemical method, among which biological method is the most widely used. The absorption and degradation of plants can effectively and safely degrade nitrogen and phosphorus in water bodies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/00E02B3/12E02B3/06C02F3/34
CPCC04B28/04E02B3/12E02B3/06C02F3/34C02F2103/007C04B2111/00284C04B18/146C04B14/08C04B14/42C04B14/02C04B14/36C04B38/0038
Inventor 王万忠李冬梅李睿华
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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