Vliv vybraných pracích a čisticích prostředků na inhibici aktivačního kalu

Abstract

The thesis evaluates the influence of different types of detergents and cleaning products on the respiratory inhibition of the sludge in the activation process of a small domestic wastewater treatment plants. These wastewater treatment plants are greatly affected by inhibition, because the sufficient dilution of concentrations of the substances does not occur. This results in distortion of the metabolism of microorganisms, reducing the respiration rate and the production of energy, thus reducing bacterial growth. This decreases the ability of the oxidation of organic pollution and reduces the efficiency of the wastewater treatment plant. By measuring respiratory inhibition, we are able to determine the extent to which the substances in the wastewater are toxic. The research evaluated the impact of so called "environmental“ and commonly used detergents and cleaning agents. The thesis also examines which toxic substances are contained in different types of household cleaners and their effect on microorganisms in activated sludge. Measurements were carried out by using respirometer from company Strathox which is a subsidiary of Strathkelvin Instruments. The acquired data are afterwards evaluated