02893nas a2200289   4500008004600000245010500046210006900151260003300220300001200253490000800265520203000273653002102303653001002324653001202334653001402346653002402360653003202384653003302416653001602449653001702465653001902482653000902501100001302510700001602523700001402539856005002553       Submitted                   eng d     00aFactors related to the attraction of flies at a biosolids composting facility (Bariloche, Argentina)0 aFactors related to the attraction of flies at a biosolids compos  bCopyright 2004 Elsevier B.V.  a33 - 400 v3283 aThe composting process is used to treat biosolids from the Wastewater Treatment Plant of Bariloche (NW Patagonia, Argentina). Since 1998, an odourless, innocuous and stable organic amendment has been produced at the Biosolids Composting Plant of Bariloche. However, volatile compounds produced during this process, attract different vectors, mainly insects belonging to the Order Diptera, particularly in summer. To evaluate factors associated with the attraction of Diptera to composting windrows, volatile compounds, wind velocity, ambient and windrow temperatures were measured and their relationships with the taxa of flies found were determined. Sampling was conducted several months on newly formed windrows during 3 weeks of the thermophilic composting period. Composite samples from each windrow were taken on the first day of each sampling week, from November 1999 to March 2000 to analyze volatile compounds using an 'electronic nose'. Windrow and ambient temperatures and wind velocity were recorded on three consecutive days of each week, from January to March 2000; also the capture of flies was performed in this period. A weekly mean value was calculated for each environmental variable. Canonical Correspondence Analysis was employed to determine relationships between taxa of flies and the studied factors. The electronic nose discriminated among odours emitted, differentiating windrows by the bulking agent employed and by week of the thermophilic composting period. Ambient temperatures increased slightly during the sampling weeks; the highest values of wind velocity were registered during the second sampling week while windrow temperatures were sustained approximately 60 degrees C. Canonical Correspondence Analysis showed that attraction of flies to composting windrows was related to minimum and maximum ambient temperatures and volatile compounds for Muscina stabulans, Fannia sp. and Acaliptratae and to wind velocity for Ophyra sp., Sarcophaga sp., Cochliomyia macellaria and Phaenicia sericata.10a*Refuse Disposal10a*Soil10aAnimals10aArgentina10aDiptera/*physiology10aOrganic Chemicals/*analysis10aPrincipal Component Analysis10aTemperature10aTime Factors10aVolatilization10aWind1 aLaos, F.1 aSemenas, L.1 aLabud, V.  uhttps://sarcophagidae.myspecies.info/node/767