Composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and method for preparing composite reaction medium

A technology of reaction medium and reaction grid, applied in the field of water treatment, can solve unknown problems, achieve high compressive strength, solve the effect of loose surface structure and abundant reserves

Active Publication Date: 2017-02-15
FOODSTUFF INST BEIJING
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the preparation and properties of composite media with mineral materials and / or industrial wastes as the main raw materials, especially zeolite and coal cinders, are still unknown, and the experience that can be used for reference is limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and method for preparing composite reaction medium
  • Composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and method for preparing composite reaction medium
  • Composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and method for preparing composite reaction medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Nitrogen and phosphorus removal composite reaction medium

[0054] I. Four kinds of raw materials of zeolite, bentonite, attapulgite and slag are obtained through crushing (4 meshes of particle size after sieving)-crushing (60 meshes of particle size after sieving)-ultrafine grinding (300 meshes of particle size after sieving) respectively to obtain raw material powder body.

[0055] II. According to claim zeolite: bentonite: attapulgite: coal cinder = 2: 1: 1: 2 by weighing the raw material powder and stirring.

[0056] III. Put the mixture obtained in step II into a granulator to make 3-30 mesh granules.

[0057] IV. Dry at 60°C for 10 hours.

[0058] V. Baking at 600°C for 4h.

[0059] products such as figure 1 As shown, the composite reaction medium in the initial NH 4 + -Under the conditions of N concentration 46.44±3.83mg / L and P concentration 11.76±0.44mg / L, it can remove ≥80.2% NH 4 + -N (t ≥ 0.5h) and ≥ 93.2% of P (t ≥ 0.5h), and caused an inc...

Embodiment 2

[0061] I. Four kinds of raw materials of zeolite, bentonite, attapulgite and slag are obtained through crushing (4 meshes of particle size after sieving)-crushing (60 meshes of particle size after sieving)-ultrafine grinding (300 meshes of particle size after sieving) respectively to obtain raw material powder body.

[0062] II. According to claim zeolite: bentonite: attapulgite: coal cinder=2:1:1:1 weight ratio takes raw material powder and stirs and mixes.

[0063] III. Put the mixture obtained in step II into a granulator to make 3-30 mesh granules.

[0064] IV. Dry at 60°C for 8 hours.

[0065] V. Baking at 600°C for 3h.

Embodiment 3

[0067] I. Four kinds of raw materials of zeolite, bentonite, attapulgite and slag are obtained through crushing (4 meshes of particle size after sieving)-crushing (60 meshes of particle size after sieving)-ultrafine grinding (300 meshes of particle size after sieving) respectively to obtain raw material powder body.

[0068] II. According to claim zeolite: bentonite: attapulgite: cinder = 2: 1: 1: 4 weight ratio to take raw material powder and stir.

[0069] III. Put the mixture obtained in step II into a granulator to make 3-30 mesh granules.

[0070] IV. Dry at 55°C for 10h.

[0071] V. Baking at 700°C for 3h.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
hardnessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and a method for preparing the composite reaction medium. The composite reaction medium comprises, by weight, 1.0-3.0 parts of zeolite, 0.7-1.3 parts of bentonite, 0.5-1.5 parts of attapulgite and 1.0-6.0 parts of coal cinder. The zeolite, the bentonite, the attapulgite and the coal cinder are sintered to obtain the composite reaction medium. The composite reaction medium and the method have the advantages that the nitrogen and the phosphorus can be synchronously, efficiently and quickly removed by the composite reaction medium, the composite reaction medium can be used as a biological carrier, accordingly, shortcomings of instability of biological phosphorus removal, large quantity of mud due to chemical phosphorus removal and the like can be overcome, and detour flow of water at the fronts of the barriers and the like can be prevented.

Description

technical field [0001] The invention relates to a composite reaction medium for in-situ restoration of polluted groundwater, belonging to the field of water treatment, in particular to a novel composite reaction medium used for denitrification and phosphorus removal of groundwater osmotic reaction grids and a preparation method thereof. Background technique [0002] Ammonia nitrogen and inorganic phosphorus are common pollutants in groundwater worldwide, and their pollution has attracted great attention from scholars and governments at home and abroad. According to incomplete statistics, high concentrations of ammonia nitrogen have been found in groundwater in China, the United States, Australia, the United Kingdom, and South Korea [Li Shengpin et al. Case Analysis of Ammonia Nitrogen Blocking and Removal Engineering Design of Riverside Water Source Wells. Journal of Environmental Science, 2015, 35 (8): 2471-2480; Park et al.Lab scale experiments for permeablereactive barrie...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F103/06C02F101/16
CPCC02F1/281C02F3/34C02F2101/105C02F2101/16C02F2103/06
Inventor 黄国鑫时满李佳朱百泉赵燕王守伟
Owner FOODSTUFF INST BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap