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Coal base biological soil for replacing topsoil

A coal-based, biological technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as lack of topsoil coverage, lack of nutrients, poor water retention capacity, etc.

Active Publication Date: 2005-09-21
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main measures to control desertified land include: "five belts in one" sand-fixing technology, wind-proof sand-fixing forest construction technology, aerial seeding afforestation technology, etc., but the difficulties in implementing these technologies are the lack of topsoil, poor water retention capacity and lack of nutrition in desertified land, which make plants survive. The rate is low, the effect is not obvious
For the land damaged by mines, filling and non-filling reclamation technologies are mainly used. Most of the current excavation deep pad shallow non-filling reclamation technologies fail to consider the problem of reasonable soil reconstruction, resulting in the reversal of the reclaimed soil layers or the reclaimed soil conditions. Poor, low productivity of reclaimed land
Filling and reclamation techniques using filling materials such as fly ash and coal gangue often lack fertile topsoil coverage, making it difficult to restore vegetation

Method used

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  • Coal base biological soil for replacing topsoil
  • Coal base biological soil for replacing topsoil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Use coal-based bio-soil A formula, the content of each component is: 35% of weathered coal, 40% of fly ash, 14% of coal gangue, 10% of bentonite, 0.2% of water retaining agent, and 0.8% of soil stabilizer. Using this embodiment as a substrate to plant alfalfa, compared with the western desertified soil, the plant biomass increased by 20%.

Embodiment 2

[0021] Embodiment 2: Use coal-based bio-soil A formula, the content of each component is: weathered coal 55%, fly ash 8%, coal gangue 35%, bentonite 1%, water retaining agent 0.9%, soil stabilizer 0.1%. Using this embodiment as a substrate to plant alfalfa, compared with the western desertified soil, the plant biomass increased by 25%.

Embodiment 3

[0022] Example 3: Coal-based bio-soil B formula is used, the content of each component is: weathered coal 35%, fly ash 35%, peat 28%, bentonite 1%, water retaining agent 0.9%, soil stabilizer 0.1%. Using this embodiment as a substrate to plant alfalfa, compared with the western soil, the plant biomass can be increased by 35%.

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Abstract

The invention relates to coal base biological soil for replacing topsoil which comprises (by weight percentage) wind-blown coal 30-60%, coal gangue 10-40%, coal ash 10-40%, alta-mud 1-10%, turfy soil 10-30%, water-loss reducer 0.1-1%, soil stabilizer 0.1-1%.

Description

technical field [0001] The invention belongs to the technical field of land reclamation and ecological restoration and the field of ecological environment materials, and in particular relates to a substitute material for topsoil in land reclamation and ecological restoration. Background technique [0002] Man-made activities such as mining and natural disasters have destroyed a large amount of land and regional environments, and are the main causes of land desertification and agricultural land reduction. On the one hand, the exploitation of mineral resources has played a huge role in promoting the economic development of our country. On the other hand, it will inevitably cause damage to the land and the environment, turning plains into uneven subsidence land, and fertile farmland into low-yield slopes. Swamps or reedy lakes, dense grasslands degenerate or become sandy land, and at the same time, the accumulation of coal gangue and other mine solid waste not only occupies lan...

Claims

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Application Information

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IPC IPC(8): C04B14/04C04B18/04C04B18/24
CPCY02W30/91
Inventor 胡振琪高爱林杨秀红
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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