Arbetsmiljoen vid hantering av traedbraensle och torv foer energiproduktion. (Work environment at thermal power plants using biofuel and peat. Presence and concentrations of airborne micro-organisms, endotoxins and dust and proposals to control measures).

摘要

In the present study the concentration of airborne micro-organisms (fungi, bacteria), endotoxins and dust have been measured at three thermal power plants. Two of the plants used wood fuel and one used peat. The measurements were carried out as stationary measurements at different positions along the handling of biofuel at delivery, transportation and storage. Personal samples were taken in the reception hall when fuel from trucks were tipped and when the plant was rounded. The levels of bacteria, fungi, endotoxins and dust varied between different positions in the plants and between the three plants. The concentration varied according to type of fuel, fuel quality, the construction of the plants and the way in which the fuel was handled. The stationary samples showed higher concentrations of bacteria and fungi at the plant using peat. Enhanced concentrations were measured when old stored peat was used. The concentration of endotoxins was low in all three plants. The highest concentration of endotoxins was found during unloading of old stored wood fuel. Respiratory symptoms have been observed among the personnel at the plant using peat. A review has been made of the literature about health hazards after exposure to micro-organisms, endotoxins and dust from biofuel (wood and peat). Recommendations for improvement of the work environment are included in the report. (25 refs., 11 figs., 4 apps.).