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agricultural waste disposal

Agricultural waste is plant residues from agriculture. These waste streams originate from arable land and horticulture. Agricultural waste is all parts of crops that are not used for human or animal food. Crop residues consist mainly of stems, branches (in pruning), and leaves. It is estimated that, on average, 80% of the plant of such crops consists of agricultural waste.

The four most commonly grown crops worldwide are sugarcane, maize, cereals, and rice. The total weight of all these crops is more than 16,500 billion kilograms per year. Since 80% of this consists of agricultural waste, many tens of thousands of billions of kilograms of agricultural waste remain worldwide. Some 700 million tonnes of agricultural waste is produced annually by the EU.

Agricultural organic fertilizer raw materials

Several types of agricultural waste can be disposed of for organic fertilizer production due to their organic nature and nutrient content. Here are some common types of agricultural waste suitable for organic fertilizer production:

  • Animal manure: chicken manure, cow dung, sheep manure, horse dung, rabbit dung, etc.
  • Domestic waste: kitchen waste.
  • Industrial waste: vinasse, vinegar residue, cassava dregs, sugar residue, furfural residue, etc.
  • Agricultural residues: crop straws, bean pulp, cottonseed meal, etc.
  • Municipal sludge: river sludge, sewage sludge.

These agricultural waste materials, when properly disposed of, can be processed into organic fertilizers through composting, fermentation, or other suitable methods. Recycling agricultural waste for organic fertilizer production contributes to sustainable agriculture by enhancing soil fertility and reducing the environmental impact of waste disposal.

agricultural waste disposal methods:

Common agricultural waste disposal methods include incineration, dumping, landfill, random stacking, etc. All of these methods can cause pollution and waste resources. The above-mentioned agricultural organic waste contains a variety of nutrients, such as nitrogen, phosphorus, potassium, etc., and can be made into organic fertilizer. At the same time, organic fertilizer can be used again in agricultural production.

 Therefore, composting is an economical and environmentally friendly option. In addition, to produce high-quality organic fertilizer, the introduction of an organic fertilizer production line can be considered.

Agricultural waste disposal—Composting
fermentation-tank & compost-turner

Organic waste composting is a sustainable method that transforms agricultural waste into nutrient-rich compost, enhancing soil quality and supporting plant growth. The disposal process involves the following steps:

1. Collect diverse organic wastes, including crop residues, livestock and poultry manure, kitchen waste, and plant materials, to provide essential nutrients like nitrogen, phosphorus, potassium, and organic matter.

2. Mix the organic wastes, ensuring the right carbon-to-nitrogen ratio. Adjust the moisture content to approximately 55%, avoiding excessive or insufficient water, which can hinder composting.

3. Place the mixed wastes in closed fermenters or long rows, depending on the production scale and available resources.

4. Microorganisms initiate decomposition, generating heat that helps eliminate pathogens and weed seeds. Regular turning of the compost pile promotes oxygen supply and microbial activity.

5. Complete the composting process, with the organic fertilizer fermentation tank processing Time only 7 days and the compost turner needs at least 15-30 days. This results in nutrient-rich organic fertilizer, contributing to sustainable agriculture and waste disposal.

Agricultural waste disposal—Organic fertilizer production line
chicken manure organic fertilizer production line

You can apply the fermented organic waste to your farmland or sell it to others. For the latter, you need to further process the fermented organic waste. There are two production options, namely powdered organic fertilizer and granular organic fertilizer production.

When producing powdered organic fertilizer, the fermented organic fertilizer needs to be crushed and screened. Through this process, a fine, pure fertilizer powder can be produced. Finally, bagged organic fertilizer can be made through an automatic packaging machine.

Another type of commercial organic fertilizer is granular fertilizer. In addition to crushing and screening, organic waste also needs to be granulated. Powdered organic waste is converted into granules with the assistance of water and a rotary drum granulator. Since wet granulation increases the moisture content of the fertilizer granules, excess moisture needs to be removed through a drying and cooling process before final packaging. Screen the organic fertilizer again to ensure uniform particle size and beautiful appearance before packaging.

How to turn agricultural waste into fertilizer?

The application of agricultural compost equipment can save labor and shorten the fermentation process. The main function of the composter is to improve composting conditions, such as moisture content, oxygen content, temperature, etc., by turning and stirring. ABC Machinery offers you two types of compost machines.


Granulating of agricultural waste fertilizer pellets

The utilization of a fertilizer granulator machine is indispensable for organic fertilizer plants. Drawing on extensive expertise in fertilizer machinery, we not only provide suitable wet granulation equipment but also devise customized solutions for dry granulation based on your specific requirements. Elevate your fertilizer production by integrating our top-notch machines, designed to meet a variety of granulation needs and supported by years of industry knowledge.

Our range includes various types of fertilizer granulator machines, such as Rotary Drum Granulators, Disc Granulators, Flat Die Pellet Mills, and Ring Die Pellet Mills, each meticulously tailored to meet distinct production requirements. Whether opting for wet or dry granulation methods, discover the ideal solution to optimize your organic fertilizer production process and achieve outstanding results.

flat die pellet mill
agricultural waste disposal success cases:

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Appropriate moisture content is crucial for compost aeration and fermentation efficiency. It is recommended to maintain the moisture content of compost between 50% and 60%. For agricultural waste with high moisture content, consider using a solid-liquid separator to reduce moisture or add the necessary amount of water when required.

Temperature is a critical factor during the composting process. Regularly monitor the temperature of the compost heap. If the fermentation temperature is consistently too high or too low for several days, take timely measures such as turning the compost or checking moisture content to adjust the temperature.

After composting, avoid directly applying organic waste to the soil, as unstable compost may harm the soil and plants. It is recommended to let the composted organic waste sit for a few days to ensure stability before considering appropriate utilization methods.

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