- Anaerobic digestion is a collection of processes by which microorganisms break down biodegradable material in the absence of oxygen.
The process is used for industrial or domestic purposes to manage waste and or to produce fuels such as
Bio Gas that is then harnessed and used to produce elictricity.
Much of the fermentation used industrially to produce food and drink products, as well as home
fermentation, uses anaerobic digestion. Silage is produced by anaerobic digestion.
The digestion process begins with bacterial hydrolysis of the input materials. Insoluble organic polymers, such as carbohydrates, are broken down to soluble derivatives that become available for other bacteria. Acidogenic bacteria then convert the sugars and amino acids into carbon dioxide, hydrogen, ammonia, and organic acids. These bacteria convert these resulting organic acids into acetic acid, along with additional ammonia, hydrogen, and carbon dioxide. Finally, methanogens convert these products to methane and carbon dioxide. The methanogenic archaea populations play an indispensable role in anaerobic wastewater treatments.
The key process stages of anaerobic digestion
Many microorganisms affect anaerobic digestion, including acetic acid-forming bacteria (acetogens) and methane-forming archaea (methanogens). These organisms promote a number of chemical processes in converting the biomass to biogas
Gaseous oxygen is excluded from the reactions by physical containment. Anaerobe utilize electron acceptors from sources other than oxygen gas. These acceptors can be the organic material itself or may be supplied by inorganic oxides from within the input material. When the oxygen source in an anaerobic system is derived from the organic material itself, the 'intermediate' end products are primarily alcohols, aldehydes, and organic acids, plus carbon dioxide. In the presence of specialised methanogens, the intermediates are converted to the 'final' end products of methane, carbon dioxide, and trace levels of hydrogen sulfide. In an anaerobic system, the majority of the chemical energy contained within the starting material is released by methanogenic bacteria as methane
Each EnergyBIA anaerobic digestion plant is custom tailored to the customers own unique demands and specifications
Bio Gas Production
Agricultural Biogas Plants that harness energy from anaerobic digestion
When planned optimally, agricultural biogas plants perfectly fit into farming and soil nutrition cycles. The anaerobic digestion of agricultural byproducts and energy crops not only provides electricity and usable heat it also produces a high quality organic fertilizer and soil conditioner.
The nutrients contained in the substrate are broken down during the biogas conversion thereby increase the fertilizer quality of the digested product on the arable land. Plants can access the nutirents in digestate much easier than in untreated manure.
At EnergyBIA we have developed a complete anaerobic digestion process that produces high value raw materials such as Gas, Heat, Electricity, Fertiliser and organically grown fruits and vegetables
Our model is based on self sufficiency, sustainability and flexibility so that the cycle of waste producing energy, energy producing food is complete and self feeding.