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Small scale bioreactor

To design equipment for organic waste recycling which is designed for small farms and food processing companies.

The project idea lies in the possibility and suitability of co-digestion of different phytogenous and animal organic wastes. The project foresees the development of technology and equipment for organic waste neutralisation from small farms and food processing companies. The well known technology of biochemical disintegration of organic substance in anaerobic conditions is known technology for organic waste fermentation in mesofilic (35-42 C) conditions in specially equipped reactors called digesters. The produced gas mixture (biogas) consists of 50-65% methane and has LHV 20-27 MJ/m3. Organic animal origin wastes in UKRAINE and LITHUANIA (cattle, pig and poultry manure) after the continuous period of occurrence in pits (about year) are put onto fields as organic fertilisers. As a result of such waste handling, methane and nitrogen monoxide, which are strong greenhouse gases, are emitted into the atmosphere. Methane has 21 times more harmful environmental effect than carbon dioxide, and nitrogen monoxide - 310 times more. In addition, the inorganic compound in such wastes often influences soil micro-flora, thus decreasing its fertility. Undigested waste is of high risk for human and animal diseases. The dangerous nitrogenous compounds can also penetrate underground water, thus impairing its quality. Using unprocessed waste as fertiliser often leads to high weed seed germination. Phytogenous wastes (leaves, grass, vegetables and fruits, etc.) are often not utilised usefully. However, such wastes have considerable potential for biogas production, and also can improve the composition of digested mixtures thus stabilising and optimising the biochemical process of organic substance degrading. It is known that digestion can decrease the harmful influence of organic wastes on atmosphere, underground water and soils. This way it allows for destroying pathogenic micro-flora to an acceptable level and stipulates fully decreasing weed seed germination. In general, such technology allows for improving the level of waste handling and overall sanitation. The tasks of the project are: 1. Gain new knowledge about biogas quantity and composition, and the suitability of digestate used as organic fertiliser when different organic substances are digested in small scale bioreactors: 1.1. Estimate quantity of biogas produced from different organic wastes and their mixes; 1.2. Estimate content of biogas produced from different organic wastes and their mixes; 1.3. Set optimal parameters of bioreactors; 1.4. Set optimal composition of mix of organic waste; 1.5. Investigate possibility of digested organic waste used as fertiliser. 2. Assure spread of results of essentially based bioreactor design; 3. Design experimental examples of bioreactor. Upgrading and applying small facilities which treat organic waste producing biogas to run with various organic waste compositions or mixes will decrease the problems mentioned about waste utilisation, and increase alternative energy use in LITHUANIA, UKRAINE and other European countries. However, biogas production from different organic wastes is not the same. By mixing them, more effective biogas production is expected. That is why important to seek mixes for effective biogas production. Also, further application of digested biomass is important. Digested organic wastes become valuable homogenous fertilisers, which could be used for improving soil conditions, thus increasing crop capacity.
Acronym: 
Bioreactor
Project ID: 
4 528
Start date: 
01-10-2008
Project Duration: 
46months
Project costs: 
1 700 000.00€
Technological Area: 
Biotreatment / Compost / Bioconversion
Market Area: 
Industrial Equipment and Machinery

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.