The composting process depends on many different stages and criteria. In general, there are three stages to the composting process.

Active or Thermophilic phase - This is the phase in which the fastest breakdown of materials occurs. After the materials are mixed and the heap is formed, the temperature rises (above 45°C) and decomposition occurs by aerobic, thermophilic organisms such as bacteria, actinomycetes, fungi and protozoa.

Microorganisms use oxygen to consume raw materials and breathe carbon dioxide. Temperature and humidity beyond the optimum ranges (40-60°C, 50-60% humidity) or low oxygen levels will reduce biological activity. High humidity levels reduce oxygen. Low humidity levels can cause temperatures to get too high.

The time required for the active phase will depend on the materials, ambient air temperatures and the composting method. Rotary and ventilated onboard systems can offer the shortest times. A compost pile with frequent turns can have an active phase as short as 1-4 months, or up to 4-8 months with less turns and 6-24 months for passive composting without returns and active aeration.

Curing or Mesophilic stage - After the main thermophilic stage, most materials degrade and cannot be recognized from their original form. Temperatures are more stable (usually below 40°C) even after the heap is rotated. At this stage there is a shift in populations of organisms towards those that prefer lower temperatures. Turning is not necessary but the compost should remain aerobic. 

In the curing phase, the compost is not yet mature. Immature compost can have higher levels of organic acids, high C:N ratios, extreme pH values, or high salt content that can damage or kill plants. The curing time can vary up to a year, but is usually less than 3 months.

maturation - Compost needs time in storage to mature. Maturity is an indication of the degree of humification or the conversion of organic compounds into humic substances that are resistant to microbial degradation. There are several tests for compost maturity. 

Lab tests can be used, or germination tests can be used using lettuce or cress seeds. Immature compost can damage the germinating seeds and the plants will not survive. During the ripening phase, batch size is less critical than during the active or curing phases. The material can move from storage to use when appropriate, but should be used as soon as possible.

Our organization provides very different certification services for businesses in various sectors and carries out the necessary testing, analysis, control and evaluation activities within this framework. In these works, it always follows domestic and foreign standards, applicable legal regulations and generally accepted practices. Our organization has a trained and experienced staff and advanced technological facilities. In this framework, it also provides compost certification and C-Label (Compost Labeling) compost labeling services to businesses that request it.