Beneduce Luciano, Gatta Giuseppe, Bevilacqua Antonio, Libutti Angela, Tarantino Emanuele, Bellucci Micol, Troiano Eleonora, Spano Giuseppe
Department of the Science of Agriculture, Food and Environment, University of Foggia, via Napoli 25, 71122 Foggia, Italy.
Department of the Science of Agriculture, Food and Environment, University of Foggia, via Napoli 25, 71122 Foggia, Italy.
Int J Food Microbiol. 2017 Nov 2;260:51-58. doi: 10.1016/j.ijfoodmicro.2017.08.009. Epub 2017 Aug 16.
In order to evaluate if the reuse of food industry treated wastewater is compatible for irrigation of food crops, without increased health risk, in the present study a cropping system, in which ground water and treated wastewater were used for irrigation of tomato and broccoli, during consecutive crop seasons was monitored. Water, crop environment and final products were monitored for microbial indicators and pathogenic bacteria, by conventional and molecular methods. The microbial quality of the irrigation waters influenced sporadically the presence of microbial indicators in soil. No water sample was found positive for pathogenic bacteria, independently from the source. Salmonella spp. and Listeria monocytogenes were detected in soil samples, independently from the irrigation water source. No pathogen was found to contaminate tomato plants, while Listeria monocytogenes and E. coli O157:H7 were detected on broccoli plant, but when final produce were harvested, no pathogen was detected on edible part. The level of microbial indicators and detection of pathogenic bacteria in field and plant was not dependent upon wastewater used. Our results, suggest that reuse of food industry wastewater for irrigation of agricultural crop can be applied without significant increase of potential health risk related to microbial quality.
为了评估食品工业处理后的废水再利用是否适合用于粮食作物灌溉且不会增加健康风险，在本研究中，对一个种植系统进行了监测，该系统在连续的作物季节中使用地下水和处理后的废水灌溉番茄和西兰花。通过传统方法和分子方法对水、作物生长环境及最终产品进行微生物指标和病原菌监测。灌溉水的微生物质量偶尔会影响土壤中微生物指标的存在情况。无论水源如何，均未发现水样中病原菌呈阳性。在土壤样本中检测到了沙门氏菌属和单核细胞增生李斯特菌，与灌溉水源无关。未发现病原菌污染番茄植株，而在西兰花植株上检测到了单核细胞增生李斯特菌和大肠杆菌O157:H7，但在收获最终产品时，未在可食用部分检测到病原菌。田间和植株中微生物指标水平及病原菌检测情况与所使用的废水无关。我们的结果表明，食品工业废水再利用于农作物灌溉时，不会显著增加与微生物质量相关的潜在健康风险。
