Mechanisation and automation of the composing of organic waste using a tedder

Mechanisation and automation of the composing of organic waste using a tedder

25 April 2023
The most important factor in conserving natural resources alongside and preserving the urban environment is the industrial recycling of organic waste and its subsequent reuse as agricultural fertiliser.

The main method of processing organic waste today is composting. This process is the controlled conversion of organic matter into fertiliser, followed by disinfection using the access to oxygen at the optimum temperature and humidity of the material. 

To speed up the composting process and at the same time aerate the biomass, a tedding method is used. The aerobic method replenishes the organic matter with atmospheric oxygen and removes the carbon dioxide from it. Also, during the stirring process, moisture is added to the biomass, which is necessary for the vital activity of microorganisms. The resulting substance is poured over with earth and placed in special stacks, or piles.

The tedding process is now as mechanised and automated as possible. The main machine used for mixing, aerating, moistening and enriching the compost mass with microbiological substances is a tedder. 

The following types of tedders are used depending on the range of application, the size of the pile to be processed, the volume of the organic biomass processed as well as some other factors: 


- Self-propelled tedders;

- Mounted tedders;

- Trailed tedders;

- Tunnel (bridge) tedders.

Self-propelled tedders are used for accelerated composting of organic waste in large poultry farms, large pig farms and landfill sites.


The self-propelled tedder has its own cab, engine and chassis with transmission. This allows it to work autonomously without the need for auxiliary vehicles.
The equipment is able to remove carbon monoxide accumulated in the piles, to mix all the waste evenly, and to aerate the biomass effectively at the same time. Many self-propelled tedders have the option of adding coagulants to the material to be processed, which speeds up the decomposition process and reduces the composting time. It is also possible to decontaminate compost and maintain its moisture content by spraying reagents.

Low fuel consumption, high mobility, and high operational efficiency are some of the advantages of this type of tedder. 

As opposed to the self-propelled one, the mounted tedders are driven by a tractor and powered by its hydraulic system. The rotating rotor of the tedder turns, crushes and oxygenates the compost mass.

The width and original shape of the crop to be tedded does not matter for the mounted tedder. It is distinguished by its high output and maximum mixing efficiency, and has the ability to form a bale without a track.
 
The Compost Tedder is used to produce high quality decontaminated compost from solid and semi-liquid animal and vegetable waste. This equipment is used in large livestock farms and municipal solid waste landfills.
 
The range of advantages of the mounted tedders include high output, maximum mixing of the processed material, possibility of forming banks without tracks, easy transportation, as well as quick mounting and dismounting of the equipment.

Trailed tedders are used both for preparation and decontamination and disposal of organic waste. This type of tedder works as a tractor unit and is powered by its PTO and hydraulic system.


The principle of operation of the trailed type tedder is not much different from other types of tedding equipment. The rotor blades mix and crush the material fragments. The raw material is then saturated with oxygen. If the temperature of the biomass is high, it is cooled. If necessary, the raw material is moistened in the tedding process through a special sprayer. Many compost tedders are equipped with a biological drying function if there is excessive moisture content.

A trailed compost tedder offers many advantages. First and foremost, the price is low. It is considerably lower than the price of self-propelled and overhead tedders. The equipment is characterised by high mobility and off-road mobility. It can be used in the field in areas where there are no specially prepared composting sites. A trailed tedder is the optimal solution for processing raw materials on small sites.

At present, the technology of tunnel composting of MSW and organic waste is actively applied in the world practice. This method makes the organic matter enter the natural cycle of the environment and is converted into compost, a valuable organic fertiliser. In the tunnels, the supply of moisture, oxygen, cooling and heating temperatures are automatically regulated.
 
The tunnel (bridge) compost tedder enriches with oxygen and splits the organic waste into fibres while mixing it at the same time, which speeds up the composting process considerably. The equipment is capable of processing animal and vegetable waste with additional plastic and foil paper inclusions.

The tedding operation is based on the principle that the tedder carriage moves across the buried composting area with its rotor blades, stirring and moving the biomass, opening it up to oxygen. Then the process of aerobic fermentation of biomass and its further processing into organic fertilizer starts. The tedder gradually mixes and moves the compost forward on the compost site from the stack formation point to the outermost boundary.

In addition to the tedding function, some tunnel tedder models also have a piling function. The pile forming process is carried out by feeding the material to the tedder's stationary belt conveyor, which transfers it via another stationary conveyor to a reversible reel conveyor which forms the pile.

The operation of the tunnel (bridge) compost tedder is automated. The machine is controlled from a local control unit, located in a separate enclosed room in the workshop. The influence of the human factor in controlling the equipment is reduced to a minimum.
 
The experts at TEHNOROS have developed a state-of-the-art composting rotary tedder with high output. 

If you are interested in purchasing a rotary compost tedder, please call us at: +7 (812) 718-82-82. Our specialists will answer all your questions and provide detailed information about our equipment.

You can also write to us at info@tehnoros.ru