Occupational hygiene in two combined-drum-and-tunnel composting plants managing source separated biowaste and sludge.
Occupational hygiene was investigated in two Finnish combined-drum-and-tunnel composting plants, Plant A (composting sewage sludge) and Plant B (composting source-separated biowaste), in 1998-2000. The concentrations of viable mesophilic and thermophilic microbes (fungi, bacteria, and actinomycetes), the total number of microbes (viable + dead), endotoxin concentrations, and noise level were determined for each plant. In addition, dust concentrations were investigated in Plant B. In Plant A, working areas were aired before the measurements were taken. Differences in microbe concentrations between the plants were statistically significant. There were more problems with microbes in Plant B, where the working areas were not aired, Also, endotoxins were a problem in Plant B; the threshold value of 200 endotoxin units per cubic meter was exceeded in several measurements.
Tolvanen
Outi K
OK
University of Jyväskylä, Department of Biological and Environmental Sciences, Finland. outi.tolvanen@iss.fi
Hänninen
Kari I
KI
D001419:Bacteria / Q000302:isolation & purification; D004731:Endotoxins / Q000302:isolation & purification; D005387:Finland; D005658:Fungi / Q000302:isolation & purification; D006920:Hygiene; D007221:Industry; D017744:Medical Waste Disposal / Q000379:methods*; D016272:Occupational Health; D012722:Sewage; D012987:Soil
D004731:Endotoxins; D017744:Medical Waste Disposal; D012722:Sewage; D012987:Soil