A kind of soil conditioner for preventing and controlling tobacco bacterial wilt and its application

Abstract

The invention discloses a soil conditioner for preventing and treating tobacco bacterial wilt and an application thereof. The soil conditioner is prepared by the following processes: 1) drying residual activated sludge and then crushing the residual activated sludge by a screen, so as to obtain fine powder; and 2) compressing and pelletizing the fine powder obtained in the step 1), carrying out pyrolysis on the fine powder under an anoxic condition, and then cooling the fine powder, so as to obtain the soil conditioner. The soil conditioner for preventing and treating the tobacco bacterial wilt disclosed by the invention contains abundant activated carbon and mineral substances, the content of an organic matter of the soil can be replenished, the moisture and nutrients are effectively stored, the soil fertility is improved, the physical and chemical properties of the soil are improved by virtue of the soil conditioner, the fertilizer and nitrogen can be protected, crop growth is promoted, soil-borne diseases can be effectively prevented and treated, particularly, the tobacco bacterial wilt can be significantly prevented and treated, heavy metals can be passivated, plant nutrients can be replenished, the continuous cropping obstacle can be removed, the micro-ecological environment of the soil is regulated, the disease resistance of the crop can be improved, the problem of disposal of the residual activated sludge is solved, waste is changed into treasures, and the sludge resource is utilized to the maximal extent.

Description

technical field [0001] The invention belongs to the technical field of soil conditioners, in particular to a soil conditioner for preventing and treating tobacco bacterial wilt, and also relates to the application of the soil conditioner for preventing and treating tobacco bacterial wilt in the preparation of environmentally friendly adsorption materials. Background technique [0002] Activated sludge method is the basic method of sewage treatment. It has the advantages of low operating cost, low treatment cost and good sewage treatment effect. It is suitable for large water volume and high load sewage treatment, so it has been widely used, especially in urban sewage treatment. The activated sludge method is widely used. [0003] Activated sludge is composed of aerobic microorganisms that have the ability to adsorb and decompose organic pollutants in sewage, showing biochemical activity. When the activated sludge method treats sewage, these biological flocs are suspended in...

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Problems solved by technology

[0004] Excess activated sludge is a resource that has been misplaced. If it is not handled properly, it will cause serious secondary pollution. Therefore, the treatment and disposal of excess activated sludge has become a major problem affecting the ecological environment.

At present, the disposal of surplus activated sludge mainly includes several methods such as landfill, composting and incineration, but these methods have disadvantages: landfilling sludge needs to occupy a large amount of agricultural land, resulting in waste of land resources, and it is easy to damage the soil. and groundwater pollution; biocomposting equipment has a large investment and high cost, which is not suitable for popularization and application; incineration not only has high investment and high operating costs, but also causes waste of resources, and also causes serious pollution to the atmospheric environment

However, the existing soil conditioners mainly focus on improving the physical and chemical properties of the soil and increasing the fertility of the soil, and the effect of preventing and controlling soil-borne diseases cannot meet the needs of people.

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