Pre-treatment solutions

Pre-treatment of feedstock

Pre-treatment equipment for the biogas plant feedstock to separate the different waste streams and reduce the feed piece size.

Biogas plant: feed pre-treatment equipment.

Pre-treatment and feeding equipment for feeding the biogas reactor

We offer pre-treatment and feed solutions for most feedstock used in biogas plants. These solutions are always based on the feedstock characteristics and the required capacity, and are therefore selected for each project on a case-by-case basis, in accordance with the best proven technologies in the industry.

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Pre-treatment solutions

Biowaste almost invariably requires pre-treatment equipment

Whether municipal bio-waste is obtained from mixed waste separation, separate collection or from expired food products in shops, it almost invariably contains plastics and other contaminants. These contaminants can cause long-term challenges in the biogas reactor and reduce the fertiliser value of the treatment residue, so it is recommended that they are separated out before the gasification process.

There are several options for the pre-treatment of biowaste, and the equipment is typically selected according to the amount of contaminants, the type of biogas reactor and the quality requirements of the treatment residue. Options include:

A hammer mill with hammer-like ”blades” rotating around an axis that press the material to be pre-processed against a sieve. The hammer mill effectively separates organic material from plastics.
A hydromechanical pulper that separates organic, buoyant and heavy materials by the action of water and by various types of flushing and pumping. The pulper is suitable as a pre-treatment solution for wet sedimentation plants.
A drum screen that separates the pre-crushed waste fractions by a rotating motion that propels the waste fractions forward.

The need for pre-treatment of agricultural masses is determined by the input

For the microbial process in a biogas plant to work optimally, the feed must meet certain criteria:

For plant-based feeds, such as grass or spoiled root crops, crushing the feed is typically sufficient to reduce the chunk size. In its simplest form, this can mean crushing blades integrated into the conveyor screws.
In addition, the fermentation process of challenging feeds such as straw can be enhanced with enzymes or other chemicals, if necessary.
Manure often requires no pre-treatment at all, but in some cases it makes sense, for example, to separate the manure before the process.
At the end of pre-treatment, recycled liquid from the end of the process is often mixed with the feed material, which homogenises the feed mass and effectively starts the fermentation process.

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Reliable feed equipment is the cornerstone of a biogas plant

A feeding installation is a silo and conveyor system that transfers the feeds after reception and possible pre-treatment. biogas process. The supply system can be built above or below ground, as required, and can be located outdoors or inside a building. The feeders can be sized at the tender stage to meet the possible expansion needs of the plant.

There are several options for equipment choices for silos and conveyors, including: