Site-related airborne biological hazard and seasonal variations in two wastewater treatment plants

被引:89
作者
Fracchia, L
Pietronave, S
Rinaldia, M
Martinotti, MG
机构
[1] Univ Eastern Piedmont Amedeo Avogadro, DiSCAFF, Dept Chem Food Pharmaceut & Pharmacol Sci, I-28100 Novara, Italy
[2] Univ Eastern Piedmont Amedeo Avogadro, Dept Med Sci, I-28100 Novara, Italy
关键词
bacteria; bioaerosols; health risk; pathogens; season; wastewater treatment plants;
D O I
10.1016/j.watres.2006.03.016
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Results of a study conducted to assess the degree of airborne bacterial contamination generated by two wastewater treatment plants (WWTP) with different treatment systems and evaluate the dispersion of potential pathogens, have been described. Aerosols samples were collected in summer and winter with an agar impact sampler from several plant sites. External upwind and downwind controls were also examined. Total colony-forming counts of mesophilic and thermophilic bacteria, actinomycetes and streptomycetes, Gram-negatives, coliforms and sulfite-reducers were determined. Selective media were used in order to detect pathogenic bacteria. The lowest concentrations of mesophilic and thermophilic bacteria were 8 and 28 CFU/m(3) in plants A and B respectively, the highest > 40000CFU/m(3) in both plants. Strains of Escherichia coli, Clostridium perfringens, Staphylococcus aureus and Enterococcus spp. were isolated in some sites of the two plants. Salmonella spp., Yersima enterocolitica and Legionella spp. were never detected. The activities involving nebulization and mechanical aeration of wastewaters and the sewage inflows have proved to be of greatest potential risk. in both plants, we found a statistically significant dependence of bacterial contamination on the season for many of the analyzed parameters but a clear seasonal trend could not be observed. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1985 / 1994
页数:10
相关论文
共 54 条
  • [41] Health effects among workers in sewage treatment plants
    Rylander, R
    [J]. OCCUPATIONAL AND ENVIRONMENTAL MEDICINE, 1999, 56 (05) : 354 - 357
  • [42] RYLANDER R, 1976, LANCET, V8, P478
  • [43] BACTERIAL AEROSOL EMISSION RATES FROM MUNICIPAL WASTE-WATER AERATION TANKS
    SAWYER, B
    ELENBOGEN, G
    RAO, KC
    OBRIEN, P
    ZENZ, DR
    LUEHING, C
    [J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1993, 59 (10) : 3183 - 3186
  • [44] Spiewak R, 2001, ANN AGR ENV MED, V8, P51
  • [45] EFFECT OF IMPACT STRESS ON MICROBIAL RECOVERY ON AN AGAR SURFACE
    STEWART, SL
    GRINSHPUN, SA
    WILLEKE, K
    TERZIEVA, S
    ULEVICIUS, V
    DONNELLY, J
    [J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1995, 61 (04) : 1232 - 1239
  • [46] Comparison of methods for detection and enumeration of airborne microorganisms collected by liquid impingement
    Terzieva, S
    Donnelly, J
    Ulevicius, V
    Grinshpun, SA
    Willeke, K
    Stelma, GN
    Brenner, KP
    [J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1996, 62 (07) : 2264 - 2272
  • [47] Measurement strategies for the determination of airborne bacterial endotoxin in sewage treatment plants
    Thorn, J
    Beijer, L
    Jonsson, T
    Rylander, R
    [J]. ANNALS OF OCCUPATIONAL HYGIENE, 2002, 46 (06) : 549 - 554
  • [48] Health effects among employees in sewage treatment plants: A literature survey
    Thorn, J
    Kerekes, E
    [J]. AMERICAN JOURNAL OF INDUSTRIAL MEDICINE, 2001, 40 (02) : 170 - 179
  • [49] Occupational hygiene in a Finnish drum composting plant
    Tolvanen, O
    Nykänen, J
    Nivukoski, U
    Himanen, M
    Veijanen, A
    Hänninen, K
    [J]. WASTE MANAGEMENT, 2005, 25 (04) : 427 - 433
  • [50] Occupational hygiene in biowaste composting
    Tolvanen, OK
    Hanninen, KI
    Veijanen, A
    Villberg, K
    [J]. WASTE MANAGEMENT & RESEARCH, 1998, 16 (06) : 525 - 540