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EN
Bioaerosol forms microbes, their toxins and fragments of microorganisms suspended as small droplets or solid particles. The group particularly exposed are workers of sewage treatment plants and local residents. Literature reports stress the role of the fecal bacteria from the Enterobacteriaceae family and yeasts, which create a real risk of air pollution near the waste water treatment plants Emission of pathogenic microbes prevails in the neighbourhood of of sedimentation tanks, sludge drying beds. Research shows that the extent of bioaerosol influence reaches the distance of 3 km away from any waster water treatment plant.. The most frequent symptoms reported by workers from waste water treatment plants and local residents are respiratory disorders. There are also gastrointestinal and skin problems and general disorders, that can be explained by exposure to endotoxins in bioaerosol.
PL
Aerozol biologiczny tworzą drobnoustroje, ich toksyny oraz fragmenty mikroorganizmów zawieszone w postaci drobnych kropel lub cząstek stałych. Szczególnie eksponowani na jego działanie są pracownicy oczyszczalni ścieków oraz okoliczni mieszkańcy. Doniesienia literaturowe zwracają uwagę na rolę bakterii kałowych z rodziny Enterobacteriaceae oraz drożdży, które stwarzają rzeczywiste zagrożenie czystości sanitarnej powietrza przy oczyszczalniach. Emisja drobnoustrojów chorobotwórczych przeważa w sąsiedztwie obiektów związanych z osadami (zbiorniki gromadzenia osadu, poletka osadowe). Badania naukowe wskazują, że zasięg oddziaływania bioaerozolu sięga do 3 km poza teren oczyszczalni. Do najczęściej zgłaszanych objawów przez pracowników oczyszczalni ścieków oraz mieszkańców terenów przyległych, należą dolegliwości związane z układem oddechowym. Pojawiają się również zaburzenia gastryczne, skórne oraz objawy ogólne, których występowanie można tłumaczyć ekspozycją na endotoksyny obecne w bioaerozolu.
EN
In 2010 electrofishing was conducted at four sites located in the Ner River section flowing across the City of Łódź. Two species co-dominated in abundance: perch (36.1%) and roach (34.2%). The site downstream from the Stefańskiego Ponds was most abundant in fish. Among 13 species represented by almost 3 thousand specimens captured there perch and roach (36.9% and 32.6%, respectively) were dominants, while ruffe (16.5%) was a subdominant. The most human-impacted site was located downstream from the Dobrzynka Stream inflow, where no fish were caught. A comparison of the present state of fish fauna with that of monitoring studies carried out during the recent decade in the river’s section flowing across the City of Łódź indicated no significant changes in fish assemblage structure. The species composition and assemblage structure of the section is positively influenced by the recreational ponds, which feed their adjacent reaches of the river with fish. Unfortunately, in two of the sampling sites the situation of fish remains critical, which is testified to by almost total lack of them. The reason of this situation is low water quality and isolation (chemical barrier) of the upper Ner River system from the Warta River.
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