Method for using industrial and agricultural waste residue to improve phosphogypsum for vegetation recovery

A technology of vegetation restoration and phosphogypsum, applied in the fields of botanical equipment and methods, agriculture, land preparation methods, etc., can solve the problems of high cost, low utilization rate of phosphogypsum, and shortage of customer and soil sources, and achieves low cost and improved ground temperature. Water retention capacity, strengthen the effect of cold resistance and overwintering

Inactive Publication Date: 2012-07-18
WENGFU (GRP) CO LTD +1
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the current low utilization rate of phosphogypsum, the environmental problems caused by long-term open-air stockpiling, the high cost of the traditional method of covering soil and vegetation restoration, and the shortage of guest soil sources. , use solid waste to improve phosphogypsum, and carry out the optimal formula and suitable grass species for soilless vegetation restoration

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
  • Method for using industrial and agricultural waste residue to improve phosphogypsum for vegetation recovery
  • Method for using industrial and agricultural waste residue to improve phosphogypsum for vegetation recovery
  • Method for using industrial and agricultural waste residue to improve phosphogypsum for vegetation recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Referring to accompanying drawing, the method for utilizing industrial and agricultural waste residues to improve phosphogypsum for vegetation restoration comprises the following steps:

[0021] (1) Use modifiers (red mud, fly ash and sludge) to improve phosphogypsum, and the ratio of the improved matrix is: phosphogypsum: red mud: fly ash: sludge=81:2:2:15 ( According to the volume ratio), the thickness of the improved matrix is ​​10~14cm.

[0022] (2) The selected grass species and seeding rate are: white clover 12g / m 2 , tall fescue 30g / m 2 , ryegrass 20g / m 2 , Bermudagrass 15g / m 2 , alfalfa 15g / m 2 , Paspalum broadleaf 20g / m 2 Wait.

[0023] The different stages of plant growth measure its height and root system length and see Table 1 and Table 2:

[0024] Range and mean of grass plant height and root length measured 30 days and 80 days after sowing, respectively.

[0025] Table 1 The maximum and average values ​​of plant height and root length at 30 days (u...

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

No PUM Login to view more

Abstract

The invention discloses a method for using industrial and agricultural waste residue to improve phosphogypsum for vegetation recovery, which includes: according to physical and chemical characteristics of phosphogypsum and comparison of the phosphogypsum with soil constituents, using sludge generated from sewage treatment plants, coal ash generated from power plants, and red mud generated from aluminum manufacturers to improve the phosphogypsum; successfully planting lawn grass; and according to the requirements of grass grown, covering the pure phosphogypsum with an improved substrate layer 10-14cm thick, and sowing seeds on the substrate layer according to the seeding amount of common lawn grass. Grass seeds suitable for growing include seeds of tall fescue, broadleaf paspalum, alfalfa, ryegrass, trifolium repens, Bermuda grass and the like. Turfs of tall fescue, Agrostis, Bermuda grass and the like can grow normally on the improved substrate. According to the principle of 'waste control by waste', the phosphogypsum is subjected to soilless vegetation recovery, so that the cost of vegetation recovery by phosphogypsum is lowered greatly, and great economic benefit and environmental benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a method for restoring vegetation by using industrial and agricultural waste residues to improve phosphogypsum. Background technique [0002] Phosphogypsum is the waste residue discharged during the production of phosphoric acid. Usually, every 1t (P 2 o 5 ) of wet-process phosphoric acid, producing 4.5-5.5t phosphogypsum. The generated phosphogypsum is a moist fine powder, 95% of the gypsum particles are smaller than 0.2mm, the free water content is about 20% to 30%, and contains a small amount of harmful impurities such as phosphorus, fluorine, organic matter and silicon dioxide. Generally below 4.5. The State Environmental Protection Administration first classified phosphogypsum slag as hazardous solid waste at the phosphate fertilizer and sulfuric acid industry promotion circular economy work conference held in Shenyang on July 14-16, 2006. Accor...

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): A01G1/00A01B79/00
Inventor 李金娟杨丽萍刘晏含解田刘方
Owner WENGFU (GRP) CO LTD
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