METHOD FOR MAINTAINING THE BIOLOGICAL ACTIVITY AND ADAPTING THE BIOZOENOSIS OF A BIOLOGICAL EXHAUST WATER PURIFICATION PLANT IN DOWNTIME

摘要

In a process for maintaining, during standstill periods, the biological activity and adaptation of the biocoenosis of a biological wet purification unit used to degrade by biological oxidation harmful substances absorbed by washing water in the purification of waste air by washing, the waste air is subjected to preliminary washing and the resultant preliminary washing liquid enriched with materials contained in the air is supplied to the biocoenosis during standstill periods. Dust particles may be separated from the liquid before it is supplied to the biocoenosis. Other nutrients may additionally be supplied to the biocoenosis as well as the said liquid.