In the implementation of biofertilizer project
, the choice of raw materials can be all kinds of livestock manure and all kinds of wastes. The basic formula of bio organic fertilizer production varies with different types and equipment.
Chicken manure, duck manure, goose manure, pig manure, cattle and sheep manure, etc.; straw, especially the straw of legume crops; filter mud, bagasse, beet dregs, etc. of sugar industry; beer mud, distiller's grains, etc. of breweries; various kinds of cake: bean cake, cottonseed cake, rapeseed cake, etc.; grass (mud) carbon; edible mushroom dregs.
The ingredient methods vary with the source of raw materials, fermentation methods, microbial species and equipment. The general principles of the ingredients for the production process of bio organic fertilizer are as follows: the content of organic matter in the total material should be higher than 30%, preferably 50% - 70%; the ratio of carbon to nitrogen should be 30-35:1, 15-20:1 after ripening; the pH value should be 6-7.5; the content of water should be 30% - 70%.
The production process of bio organic fertilizer generally includes the following aspects: pretreatment of raw materials, inoculation of microorganisms, fermentation, drying, grinding, screening, packaging, metering, etc., which vary according to the raw materials and treatment methods.
- 1. Biological fertilizer fermentation
According to the basic formula or self selected formula, mix all ingredients after crushing, adjust the water content of the material, evenly spray the bacteria on the mixture, when the material temperature reaches 50 ° to 60 ° C, ventilate and supply oxygen with the windrow turner
for several days, so as to thoroughly kill the bacteria and eggs. If only ordinary organic fertilizer is needed to maintain aerobic fermentation until the fermentation is completed, it is suggested to further achieve bio organic fertilizer, which will be changed to anaerobic fermentation after the completion of pest control and sterilization, and the stack temperature is controlled at 35 degrees, which will gradually produce distiller's yeast flavor. After the fermentation is completed, the quality index completely conforms to the national standard, and the added value will be greatly improved.
- 2. Post treatment of fermentation materials
Most enterprises add functional bacteria for compounding and shaping, and the product dosage form is mainly powder. In addition, 1 / 3 of the products are pelletized in the post-treatment process, most of them are rotary drum granulator
, but some of them are pelletized by disc or extrusion. Particle products overcome the disadvantages of poor appearance and low level of powder products, improve the commodity of products, but also improve the production cost of enterprises, and have a certain impact on the survival of effective bacteria.