To process biogas residue into compost fertilizer residue, we can summarize the whole treatment technology as:Dehydration (separated solids - 15% can be used as fertilizer compost) → composting (composting a large amount of biogas residues into high-quality fertilizers) → granulation (making composted biogas residues into granules for easy sales and storage) → packaging, our company is professional organic fertilizer machine manufacturers, here is a brief introduction.
Dehydration of the digestate is essential because the transport distances are often too great. Producers can use solid-liquid separators to separate biogas residues into liquid (typically 1-6% dry matter) and fiber fractions (typically 20-40% dry matter)
2. Biogas plant biogas residue solid phase
Composting During composting, biogas residues are decomposed under the action of atmospheric oxygen. Composting of modern biogas waste is a multi-step, closely monitored process with measured inputs of water, air and carbon- and nitrogen-rich materials (making C:N ratios equal to values of 15–25:1).
The compost turning machine widely used in developing countries such as India, China, Nepal, etc. The whole process is assisted by crushing the digestate to size, keeping the oxygen concentration in the air above 15%, adding water and regularly ensuring proper aeration.
3. Granulation process
The granulation stage of biogas residue composting occurs after the compost crushing and screening process. The granulator is the key equipment in the production of biogas residue organic fertilizer, which directly determines the quality and appearance of the finished product. Common organic fertilizer granulators include: double-roll extrusion granulator, rotary drum granulator, disc granulator machine, new organic fertilizer granulator, new two-in-one organic fertilizer granulator, flat die granulator machine, ring die granulator, each granulator has its own production characteristics, and the fertilizer granulator machine price varies.
The automatic packaging machine is a fully automatic packaging machine with functions of automatic weighing, automatic bagging, automatic filling, automatic bag delivery and automatic sealing.