Abstract: Process for the biological treatment of effluents from wine cellars by transferring the yeasts contained in the effluents to a medium into which oxygen or air is continuously supplied so that these yeasts, placed under aerobic conditions, consume the carbon substrates of these effluents in which they develop, thus ensuring the treatment thereof.

Abstract: A process for the treatment, using anaerobic fermentation, of effluents, with a view to the removal of the organic matter and of the sulfates which they contain, carried out by means of a single reactor into which is introduced, within the biomass which it contains, a neutral gas intended to displace the H.sub.2 S formed, in which the reactor employed is a free-culture, infinitely mixed reactor.

Abstract: This invention relates to a process for the regulation and automatic control of a device for the removal of pollutants from waste water by methane fermentation, which consists of simultaneously measuring, in the gaseous phase in the digesters of a fermentation reactor, the following three parameters: output of gas emanating from the conversion of the organic matter during fermentation, the ratio of the percentages of methane and carbon dioxide and the gaseous hydrogen content, and in then processing in real time the data thus collected in order to obtain signals reflecting the instantaneous state of the ecosystem of the pollutant removal device.