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Socio-ecological biotechnology concepts for developing countries

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Conclusions

The two socio-ecological concepts described will work, of course, also with other microorganisms.Zymomonas mobilis can be replaced by yeast,Rhizopus could be replaced byAspergillus. However, both microorganisms which are presently used can produce by-products that are unsafe for human or animal consumption. It is therefore a microbiological challenge to find further microorganisms to expand the product formation.

It should also be realized that the largest renewable resource, cellulose, has not been mentioned in the context of either concept. It is well known that cellulose must eventually be included if research and development can find ways and means to separate lignin from cellulose and convert cellulose to glucose in a similar and as easy a manner as starch (Doelle 1984).

In order to be successful, fermentation processes have to be fast and efficient with a low energy input (Doelle 1986a, b; Doelle & Jones 1986). This excludes the traditional microbiological sterilization of substrates, excessive substrate or product inhibitions in any of these processes.

A further omission of socio-ecological concepts lies in the fermented food production. It is encouraging to see the realization that fermented foods are mixedculture processes and that it is time to start detailed and extensive investigations into the functioning of such cultures (Doelle 1985; Steinkraus 1987; Okagbu 1988; Odunfa 1988). It is the suggestion of the author to encourage a review on mixed culture with particular emphasis on fermented food production and its waste disposal.

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Doelle, H.W. Socio-ecological biotechnology concepts for developing countries. World J Microbiol Biotechnol 5, 391–410 (1989). https://doi.org/10.1007/BF01741818

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