ODOUR CONTROL OF WASTEWATER CANAL SYSTEM

The subject of the invention is an arrangement to regulate the nitrate-dosage odour control of wastewater canal system, which comprises at least one measuring unit (2) and one nitrate dosing unit (3), and in given cases other auxiliary equipment(s), installed on a wastewater collecting canal system, divided into canal sections (5) by lifting stations (1) and joining to a wastewater treatment plant or wastewater receiving unit, wherein the measuring unit(s), nitrate dosing unit(s) (3) and additional equipment are connected to a control centre (4) by data transferring connection and control signal lines. The arrangement according to the invention is characterised by, that the measuring unit(s) /2/ are controllable measuring instrument(s), preferably automatic electroche­mical instrument(s) providing the measurement results in the form of electric output signals to the control centre /4/, and it is (they are) capable of measuring at least hydrogen sulphide quantity; furthermore the nitrate dosing unit(s) /3/ contain a chemical storage tank /31/ equipped with a dosing means /32/ controlled from the control centre /4/; and finally the control centre /4/ consists of data processing- /41 /, arithmetical- /43/, memory- /45/ and operative units /44/, where the data processing unit /41/ is developed is capable of analysing the data according to measuring units /2/ and seasons, the arithmetical unit /43/ is developed is capable of determining the standard nitrate­quantity to be dosed based on the measurement data, while the memory unit /45/ is capable of storing the actual and archived data and the events, and the operative unit /44/ is capable of coordinating the control processes.