It is an outline on the various intensification possibilities offered by wastewater treatment technologies and it is highlighted the practical applications based on concrete examples

The soda-water invented by Anyos Jedlik has an important tradition in Hungary. This popular - especially in the county - carbonated water filled in special siphon-bottles is produced by several hundreds of smaller and bigger soda-water works in Hungary. In this beautifully illustrated article the authors outline the history of this "hungaricum".

The aims of the investigations were to estimate the biomass and the production of the macrozoobenthos and to know their season dynamics. Investigations were supported by Fishery's Foundation. Sediment chemical analysis showed that the macrozoobenthos biomass was determined by the quantity of the phosporus. Chironomid larvae formed the 70-90 per cent of benthos biomass in Keszthely basin.

The monkey goby originating from the Ponto-Caspian area, has appeared in increasingly wide-spread areas of Hungary. In the Tisza-to water reservoir in North-Eastern Hungary along the Tisza River, 83 first summer samples of the fish were collected in the vicinity of Tiszafured on October 21st, 2000. The average length of the fish, not including the caudal fins, was 50,4 mm, the average weight was 2.1 g. Their alimentari canals contained mostly gnats (Chironomidae), but also the relative amount of the taxons Copepoda, Ephemeroptera, Ostracoda and Odonata was notable.

Report on the activity of the "Natural Mineral Water Working Committee" of the FAO/WHO Codex Alimentarius Hungarian National Committee. The working committee has been functioning since 1972. The European Regional Standard (108-1981) was perpared in 1981. On its 19 Session the Codex Alimentarius Commission adopted a resolution according to which - with regard to the importance of mineral waters - the European Standard had to be redrafted to a world standard and an other standard had to be elaborated for the packaged (bottled) waters other than natural mineral waters as well. The new standard prepared in Thun Switzerland in 1996 and it was adopted on the 22 Session of the C.A.C. The elaboration of the world standard for packaged (bottled) waters other than mineral waters started in Bern, in 1998