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The presented article deals with a comparison of the structural and technical condition of sewerage systems operated by water companies and owners of water management infrastructures in the Czech Republic. The owners and operators of the sewerage systems in the Czech Republic include some municipalities with less than 2,000 PE who operate the sewerage themselves (the so-called "self-operators"). The Water Supply and Sewerage Act No. 274/2001 Sb. specifies an obligation for the operators to generate reserve funds f...

The most common method of wastewater treatment employs biological treatment. This publication focuses on aerobic biological wastewater treatment. There are two basic events - nitrification and denitrification, which most often take place in one or more activation reactors. These processes decompose organic matter in wastewater. All processes mainly take place thanks to the presence of micro-organisms, which are undoubtedly susceptible to a number of external influences. The paper describes, for example, the effect...

The concept of greywater reuse has been gaining importance recently. These systems are also becoming a must in Europe, where there has not been such a pressure exercised on greywater (shower and bath water) reuse to date. The situation is dynamically changing, some countries in southern Europe start facing a lack of drinking water and new water resources must be searched for. Recycling some of the water is also encouraged by the fact that these systems are cheaper that sea water treatment. The main reason for grey...

The aim of this paper is to introduce a small wastewater treatment plant in the Czech Republic with a capacity of 8,311 population equivalent, which was constructed in 2004. The wastewater treatment plant is designed as a mechanical-biological treatment plant with nitrification, denitrification and aerobic sludge stabilization. The activation reactors are controlled by a dissolved oxygen concentration probe. For the time being, the ammonia nitrogen and nitrate probe is only used for current concentration overview....

The presented paper deals with the determination of the efficiency of wastewater treatment plants, concentration limits and values of permissible pollution of surface water and wastewater, requirements for permitting discharges of wastewater into surface water and into sewerage in sensitive areas. The objective of this paper is to define the provisions of European Community legislation on surface water protection. These findings are applied in selected wastewater treatment plants in the Czech Republic where the mo...