Antonín SlejškaAntonín Slejška at cs.wikipedia, CC BY-SA 3.0 , via Wikimedia Commons

Compost Process Optimization

When creating or modifying a composting project, the decisions affect the entire process and have economic implications.
The amount of raw materials and the process time affect the space and infrastructure requirements, which have a significant impact on the economics of the project.
Compost facility types vary from static heaps to turned open heap composting to static aerated heaps, in-vessel-composting, or combinations thereof, but the basic compost parameters are the same in all facilities.

The quantity of raw materials is determined by the project itself and cannot be changed. The type of composting facility is a decision based on available space, site-specific regulations, and the economics of the project.

The optimization of the composting process begins with the preparation of the raw materials. This has a direct impact on process time and plant parameters such as space and infrastructure, as well as energy consumption.

Composting is the controlled aerobic decay of organic matter!

Composting is a controlled aerobic process to decay organic matter in a natural way. The composting process starts with the mesophilic stage, where compost bacteria is built up.
This stage needs a correct balance of carbon and nitrogen (C/N Ratio), humidity and oxygen.
In correct conditions in the mesophilic phase the microorganism start to break down the organics, grow and reproduce themselves. This process stage takes a few days in correct conditions and have impact on the following phases.

Process Environment

Composting is a controlled aerobic process that breaks down organic matter naturally. The composting process begins with the mesophilic stage, where compost bacteria grow.
This phase requires a correct balance of carbon and nitrogen (C/N ratio), moisture and oxygen.
Under the right conditions in the mesophilic phase, the microorganisms grow and multiply and begin to break down the organic matter. Under the right conditions, this process step takes a few days and has a positive effect on the subsequent phases.
The right parameters for the mesophilic stage have a positive effect on the further process. The optimization of the mesophilic process will lead to a reduced process time, minimizing energy consumption and investments in infrastructure.
Creating this process environment requires special attention to nutrient balance, particle size, and moisture content to rapidly build up the mesophilic phase.

Homogenous feedstock

Compost Mix

Proper preparation of the compost raw materials contributes to an efficient composting process and could significantly reduce the time frame required.
The challenge is to process the raw materials with different physical properties, which can range from wet to dry, solid, fibrous, pasty and/or granular.
Depending on the input material, it may be necessary to pre-crush coarse ingredients and defibrate others. Single or twin shaft slow rotation grinders will do the job when crushing coarse material, other inputs may require high speed hammer mills. Bio-Mix shredders are an all-in-one solution for creating a homogeneous mix that meets all parameters for composting.
The comminution of the ingredients by chopping, shredding, grinding, or shredding increases the particle surface and offers microorganisms ideal conditions to decompose them.

A homogeneous mixture with the required parameters is a guarantee for successful composting!

Related Publications