Pig manure contains much water, which is usually stored in the slurry pit. Because of unpleasant smell and its attraction to flies, the long-time stacking of pig manure will cause pollution for surrounding environment and residents. On the other hand, pig manure contains much nutrient elements, such as nitrogen, phosphorous and potassium. Therefore, it can be used as good fertilizer for soil and plants. You can convert it to organic fertilizer by composting and produce commercial pig manure fertilizer. In this way, you can dispose pig waste efficiently and decrease your own fertilizer cost or make more profits.
Pig manure management can start from composting or a small-scale compost fertilizer production line. If you just want to convert pig manure into compost for personal use, composting is enough. The small-scale compost fertilizer production is suitable for commercial pig manure compost production. And you can sell them to other people or in organic fertilizer markets. The detailed steps and machines may include:
Its production includes composting process, crushing process, screening process and packing process. Among them, compost turner and compost crusher are necessary, and you can finish other processes with workers.
Windrow composting is an easy and fast way to compost pig manure. You just need to collect pig manure and pile it in windrows with auxiliary materials (sawdust and straw powder, etc.). Because pig manure belongs to nitrogen-rich material. You need to add some carbon-rich materials (pin shaving, hay and straw from bedding) to maintain C/N ratio (25:1/30:1). Then you need to mix them evenly, so as to guarantee compost quality. Here, you can adopt windrow compost turner, whose stirring apparatus can mix these materials evenly, and turn the compost pile regularly to create favorable fermentation conditions. In the early stage of composting, you may need turn the compost 1 or 3 times per day. Two weeks later, you can turn it 1 time every two days. The turning of compost pile will redistribute moisture, move less degraded materials on the surface to inside of pile and release extra heat.
The purpose of this step is to produce uniform and fine powder. When the fermentation finishes, the water content of pig manure compost is 25% to 30%. The size of compost may be a little big, and caking may exist because of long-time stack. Therefore, you need to crush pig manure compost after fermentation, which can also provide convenience for sieving process. Both new type vertical crusher and semi-wet material crusher are available.
Sieving process is to ensure the purity and uniformity of pig manure compost. Because organic fertilizer screening machine not only can select out impurities, but also separate larger particles. Here, we recommend rotary screen machine, whose screening levels can be customized.
In packaging process, you can make bagged pig manure fertilizer. Because bagged organic fertilizer is convenient for use, storage and transportation. Here, you can fill and seal fertilizer bags manually. Or you can adopt automatic packing machine, which can pack pig manure fertilizer in different weights (25kg/50kg).
It is more complex than compost fertilizer production. The complete production process is: composting process; crushing process; screening process; granulating process—drying and cooling process, screening process; packing process. You can adopt different product combination to produce pig manure pellets production, such as compost crusher + compost screen+ pig manure fertilizer granulator+ drying and cooling equipment+ packaging machine; compost crusher + rotary drum screen + pan granulator + packaging, etc. You can freely choose any machine, according to your actual conditions (budget, space, requirements on final product).The following 2 systems are necessary for pellets fertilizer and others are same as for powder fertilizer.
There are three types organic fertilizer granulator, which is available for making pig manure fertilizer pellets, disc granulator, new type pig manure fertilizer granulator and rotary drum stirring granulator. All them adopt wet granulation, and make fertilizer pellets by mechanical force and water. Disc granulator is most common granulator, which is low cost and easy to operate. New type pig manure fertilizer granulator makes fertilizer granules by mechanical stirring force, and its granulation rate can achieve 97%. The structure and function of rotary drum stirring granulator are more compact and stronger than the former two granulators. The pellets made by it is more beautiful and have higher hardness. You can choose suitable one, according to your actual requirements
Because mentioned granulator adopts wet granulation, you need to remove extra moisture to achieve standard moisture (below 15%). Our rotary drum drying and cooling machines can help you. The drying machine take away extra moisture by heating. Then, the cooling machine will cool these pellets into ambient temperature, which is convenient for next process. Here you can build a hot blast furnace to provide heat for drying and dust collector to collect dust produced during drying and cooling. In addition, you can use agricultural waste pellet fuel, coal or gas as the fuel to provide heat.