Ocena efektywności biopreparatów w beztlenowym oczyszczaniu ścieków bytowo-gospodarczych

The results of laboratory and field investigations concerning the influence of biocatalyticadditions on anaerobic digestion of wastewater in septic tanks are presented. Commerciallyprepared bacterial cultures (Bio-7, Digest) and mixtures of bacterial cultures with enzymes (Bioenzyclar, Enzybac) were applied. It was concluded that biocatalytic additions to septic tanksinfluenced the secondary chemical and bacteriological pollution of the mixed liquor over theprimary sludge. The particular commercial biocatalysts did not improve the odour of wastewater.The effluent from septic tanks with biocatalytic additions did not meet the standards for wastewater to be drained off to the soil or to natural waters.