The town of Nyborg is situated on the Great Belt Coast in Denmark. A tar destillation company called TARCO-NORD A/S is located close to the town and its potentially obnoxious odours can affect a considerable amount of people.
For this reason, the company has developed an optical air monitoring system together with a Swedish company called OPSIS. The system is based on two rays of white light from which a computer analyses the light absorption by certain molecules. The measurings of one ray are used as background values, while the other is the entire contribution by the plant.
The OPSIS system is capable of measuring benzene, toluene, m-xylene, p-xylene, O3, SO2 and NO2. After modifications, the system has also been practical in measuring naphtalene. In addition, the system has an alarm function connected to the control room of the plant. Every minute, the current measuring data is monitored, and controlled and if it exceeds the limit value an alarm is transmitted via a modem to the control room, making the necessary action possible.
The OPSIS system can also be used in municipalities for registration and documentation of general pollution levels as well as the influences of vehicular city traffic.
For more information, please contact Mr Henning Andersen in Nyborg Municipality, fax. +45 65 312 617.
