Method for preparing organic fertilizer from sugar mill mud

Abstract

The invention provides a method for preparing an organic fertilizer from sugar mill mud. The method comprises the following steps: blending a certain proportion by weight of sugar mill mud having the moisture content of 60%-80% and a certain proportion by weight of adjusting material having the moisture content of 10%-70% to obtain a mud fermentation material having the moisture content of 50%-75%; next, putting the mud fermentation material on a three-dimensional fermentation apparatus composed of 2-40 layers and 2-40 groups of belt conveyors in the horizontal direction for dynamic aerobic fermentation, and after the mud fermentation material is converted into a decomposed organic material, directly applying the mud fermentation material as an organic fertilizer or an organic raw material for producing organic fertilizer products. According to the method, the sugar mill mud and bagasse can be effectively utilized, the fermentation effect is good, the floor area is small, and meanwhile, secondary pollution generated by stink can be avoided and the purposes of high efficiency and environmental friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of fertilizer preparation, and in particular relates to a method for preparing organic fertilizers by using sugar filter mud, bagasse and other industrial and agricultural organic wastes to prepare organic fertilizers with high efficiency, energy saving and environmental protection. Background technique [0002] In the production and processing process of sugarcane sugar enterprises in southern my country, a large amount of organic waste such as bagasse and filter mud will be produced. Among them, the production of bagasse is about 20% of the sugarcane crushed amount, and the filter mud is about 3.5%. According to the data released by the relevant management departments, the annual sugarcane output in several major sugarcane producing areas such as Guangxi, Guangdong, Yunnan and Hainan in southern my country is about 90 million tons, and about 18 million tons of bagasse are produced every year after sugar ext...

AI Technical Summary

Problems solved by technology

At present, various existing technologies basically adopt the common trough type or strip stack type in the fermentation process, which have not achieved ideal results, mainly reflected in: first, it is easy to produce serious odor, resulting in serious secondary environmental pollution The problem is that it cannot meet the requirements of environmental protection; the second is that the fermentation efficiency is low and the cycle is too long, usually 50-60 days, or even 70-80 days, and the utilization rate of the site is not high; The fertilizer efficiency is not good, and the product is not recognized by the market; fourth, the production process basically needs to rely on the secondary drying process of drying, and the production cost is high; fifth, the production process needs to add a large amount of other dry materials, and these dry materials are difficult to produce. Guaranteed supply in large quantities, making production more difficult

The main reason is that the filter mud fermentation materials are piled up thicker in tank fermentation or strip-stack fermentation, generally between 1 and 2m. Due to the above-mentioned characteristics of the filter mud and the weight of the filter mud, the stockpile The air permeability inside is very poor. Because it is aerobic fermentation, the air permeability in the stockpile directly determines the state of fermentation. Therefore, only the materials within the thickness range of 200-300mm on the surface are in a good aerobic fermentation state in the stockpile. , and the lower the aerobic fermentation state is, the worse it is. The anaerobic fermentation is basically carried out, so the fermentation process produces serious odor, and the fermentation cycle is very long. In order to obtain a certain yield, the fermentation can only be completed when the fermentation is not completed. Fermentation is artificially terminated when the maturity of the material is still relatively low and the moisture content is still high, the nutrient conversion is not sufficient, and it needs to rely on secondary drying