Cow dung is a very efficient organic fertilizer and also allows dairy farmers to monetize what they would otherwise have to dispose of as waste. For effective utilization of cow dung it is best if it is composted. During this process of composting microorganisms in the cow dung break down the dung into organic matter. Heat is also released during this, and helps to kill seeds, eggs, pathogens, and weed.
The steps for making cow dung into compost requires are:
1. Collecting the cow manure from the farm
2. Dewatering it or allowing it to dry out
3. Mixing it with other organic waste
4. Fermenting and composting
5. Crushing and granulating
6. Drying and packing
The initial steps for making compost from cow dung requires managing of its water content, which can be as high as 80% to start with and has to be brought down to between 50 and 60%. This can be done naturally through air drying, or by using dewatering machines to do so.
Air drying though cheaper, would render the surroundings unhealthy as the odor will persist. Space can also be a problem. Dewatering machines separate the liquid from the manure mechanically or use screens to separate the water from the cow dung. This water can further be used as liquid fertilizer or for converting into biogas as separate activities.
The water separation allows the cow dung to be converted into cake form, which helps in the making of compost. Straw, rice hull, and saw dust are also added for adjusting the water content and this raw material needs to be of the right size, a task easily performed by machines.
During the process of composting the microorganisms consume oxygen and water, and lead to the release of heat. This heat increase of 50-60 degrees Centigrade can lead to the reduction in the oxygen content of the cow dung, which can slow down the activity of the microorganisms. The manure pile then needs to be turned over two to four times a day initially, and once every two days till the odor disappears.
This turning over can be facilitated through the use of machines of various kinds. Once the odor disappears, the cow dung is now compost that is loose, fine and black. The powdery fertilizer from cow dung can then be bagged after it is crushed and screened. This process can also be done automatically in machines.
Machines can be set up in a production line to deal with the entire process of composting and bagging the organic fertilizer
These production lines can be set up for various capacities and can range in capacities from 800 to 1000 cubic meters per hour. Most of these machines can also be used to turning other manure from chickens, sheep, pigs, and other animals, besides farm waste, into organic fertilizer. The composting process can also be helped if the raw cow dug is allowed to go through a process of fermentation; a process that can be built into the production line of machines used for making compost from cow dung.
More detailed info on cow dung composting, welcome go to https://manuretofertilizer.com/how-to-make-cow-dung-compost/