aerobic.
anaerobic.
aerobic.
innovative.
sustainable.
international.
3A biogas process
Fermentation of solid substances - an innovative, sustainable and international concept
The process of 3A biogas production through the fermentation of solid substances takes place in three phases: the first one is aerobic (requires oxygen), the second one is anaerobic (does not require oxygen) and the third one is aerobic again. The name "3A biogas" comes from the shift between the aerobic and anaerobic phases.
1st phase – aerobic:
In the first phase, the substance is aerated, which leads to an increase in temperature. Easily biodegradable organic matter decomposes. Depending on the reactivity of the substrate, this phase takes up to 3 days and the temperature reaches up to 50°C.
2nd phase – anaerobic:
The second phase takes place under anaerobic conditions and starts when all the oxygen has been consumed. This is when the methane fermentation occurs, and biogas production takes place. The second phase takes from approximately 21 to 35 days, the volume of the substrate is reduced.
3rd phase – aerobic:
The third phase of the process begins with controlled aeration of the substrate. Due to the oxygen supply, the temperature rises to 60°C, thereby enabling hygienisation. In this phase the substrate is stabilized. In order to obtain compost with a higher degree of maturity, it is recommended to perform post-rotting on a suitable rotting area.
Examples of input materials:
Kitchen waste, organic and garden waste from commercial, private households and industry
Green waste (agricultural & municipal) and solid manure
Organic fractions from residual waste
INPUT
organic &
garden waste
green waste & solid manure
organic fractions in residual waste
process
aerobic
anaerobic
aerobic
OUTPUT
electricity
biogas
heat
compost
The process in detail
Producing biogas using the 3A dry fermentation method - simple
In the 3A process, various solid organic wastes can be fermented without prior time-consuming pre-treatment of the fermentation substance. When air is no longer supplied, the biowaste ferments in the presence of bacteria and the methane production begins. The process results in the formation of high-quality biogas and compost.
Filling the fermenter – uncomplicated
The collected input material is filled into garage-shaped concrete boxes (fermenters) using a wheel loader. Earlier, the fresh material is mixed with already fermented material. The process water that flows out during the fermentation process is collected and reused in order to optimally moisten the digestate. The substrate temperature is regulated by using a floor heater. After filling, the fermenter is closed with a gas-tight gate and the natural process of biomass fermentation begins.
Generation of power and heat from biogas - efficient
The biogas is usually used in a combined heat and power plant (CHP) to generate power and heat. The waste heat obtained is only required to a small extent for the company's own system operation, a large part of the heat is available for external use, for example for feeding into a local or district heating network or for drying materials. The electricity generated can also be used for your own needs or fed into the power grid.
INPUT
OUTPUT
analysis
location analysis
substrate analysis
profitability analysis
planning &
Construction
permit planning
execution planning
construction
Installation
Why with us?
We have 30 years of experience in the execution of various international projects that allowed us to gain extensive knowledge in the field of processing, recovery and recycling of waste. Natural closed cycles form the base for the 3A biogas production process and the implementation of this type of technology. We cooperate with various national and international standardization committees, plan and renovate sewage systems, and coordinate fertilization of agricultural areas with sewage sludge. We are heavily involved in circular economy, and we believe that 3A biogas is the optimal solution in this sense.
