Biological treatment plants
There are two types of sewage treatment plants. The first type, a drainage system consisting of a settling tank and a drainage system, and its main task is to retain the load of wastewater supplied in an uneven manner and to averaging its composition. The second type is a biological treatment plant based on the method of activated sludge and portioned activated sludge. The fluidised bed used in the plants enables to achieve a higher stability of the plant’s operation in comparison to typical solutions based on activated sludge. The second subtype uses the technology of batch treatment of sewage from activated sludge. Its main advantage is the lack of gravitational flow through the treatment and dosing of sewage into the biological chamber, which significantly increases the efficiency of the system.