|Bioconversion of Organic Residues for Rural Communities (UNU, 1979)|
|Perspectives on bioconversion of organic residues for rural communities|
For proper application of bioconversion systems, a detailed study of the optimum use that can be made of the biomass produced is necessary.
Only 5 per cent of the annual production of nutrients on land is used directly as food by man. Bioconversion systems making use of micro-organisms for SCP production can help the remaining 95 per cent to be utilized.
In most cases, food-producing farms are essential for making acceptable food for man from SCP. It is advisable to concentrate efforts, to a large extent, on the rural areas while making use of low-key technology that does not require large investments.
For the application of bioconversion, the development of stable village-scale fermentation technology and adequate evaluation of nutritional and toxicological aspects of the biomass produced form major obstacles.
A concentration on resources that are, in terms of quantity and allocation, particularly suitable for bioconversion seems advisable in order to avoid a dilution of efforts.
Of the cellulose-rich materials, straw is the most important. Among the starchy materials, the upgrading of cassava and its by-products to a protein-rich material shows good potential. Farm animal manure is considered a third major raw material that deserves high priority for upgrading.