Method for preparing organic fertilizer by combining red mud anaerobic fermentation

Abstract

The invention provides a method for preparing an organic fertilizer by combining red mud anaerobic fermentation, which comprises the following steps: 1, pulverizing red mud to prepare small solid particles; 2, uniformly mixing the small red mud solid particles serving as an additive with livestock and poultry excrement, adding an obtained mixture into an anaerobic fermentation reactor, inoculatinganaerobic fermentation microorganisms, and performing anaerobic fermentation culture; 3, after gas production is finished, taking out the red mud and livestock and poultry manure mixture from the anaerobic fermentation reactor, and carrying out dehydration treatment to reduce the water content of the red mud and livestock and poultry manure mixture; and 4, naturally air-drying the dehydrated redmud and livestock and poultry manure mixture, and carrying out crushing treatment to obtain the red mud and livestock and poultry manure mixed organic fertilizer. After the technical scheme is adopted, the organic fertilizer has the beneficial effects that the livestock and poultry manure is used as a substrate, and the red mud anaerobic fermentation is combined to prepare the mixed organic fertilizer, so that the functionality of the livestock and poultry manure as the organic fertilizer is improved, and the red mud is effectively utilized.

Description

Technical field [0001] The invention relates to the technical field of organic fertilizer manufacturing and waste resource utilization, in particular to a method for manufacturing organic fertilizer by combining red mud anaerobic fermentation. Background technique [0002] With the continuous expansion of the scale of agricultural intensive breeding, breeding waste from the breeding production process has increasingly become an important issue in the process of rural development, and the largest amount of livestock and poultry manure is generated. At present, in addition to composting, anaerobic digestion to produce biogas is an effective disposal method commonly used. The biogas produced by anaerobic digestion can obtain biogas residue while obtaining biogas energy. Biogas residue is a good organic fertilizer rich in nitrogen, phosphorus and potassium, but there is a problem of easy loss of nutrients in the process of applying it to land. In particular, the biogas residue obta...

AI Technical Summary

Problems solved by technology

At present, the main application field of red mud is the manufacture of construction and roadbed materials. It also has some applications in environmental pollution control, such as as an adsorbent for waste water and waste gas pollutants and as an improver for acidic soil. However, various problems limit its use in the environmental field. scope of application

Red mud is rich in calcium, magnesium, iron and other nutrients needed by the soil, but its alkalinity is strong, and it is also rich in unfavorable factors such as a large amount of sodium and aluminum, which can affect the formation of soil aggregates and produce phytotoxicity