Applied sciences

Archives of Environmental Protection

Content

Archives of Environmental Protection | 2005 | vol. 31 | No 2

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Abstract

550 individual odour intensity (S) assessments of 62 samples of air polluted with 2-propanol were collected (concentration c = 46-2 1000 mg/m3). The data were used to establish odour detection threshold of 2-propanol by extrapolation to S = 0 in the coordinate system of S-log c. The obtained values were compared with triangular tests results and data published in the literature. A reason for apparent positive deviations from Weber-Fechner law within a range of low odour intensities was indicated,
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Authors and Affiliations

Joanna Kośmider
Beata Krajewska
Monika Sosialuk
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Abstract

Anaerobic digested sludge supernatant is rich in phosphates and ammonia nitrogen. Phosphates can be almost completely removed in the process of struvite precipitation. Simultaneously, if only magnesium is supplied, usually only a minor part of ammonia equivalent to phosphates will be removed. Increase in pH to about 8.5 or above leads to the presence of free ammonia which affects the struvite crystals form. The possibility of additional ammonia removal with an external or internal source of phosphates was also accounted for. The final product (precipitate) could be considered as a "biofertilizer" or "biosoil" in connection to the technology applied.
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Authors and Affiliations

Jan Suschka
Sebastian Popławski
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Abstract

This paper presents the results of a sanitary and bacteriological study of Lake Hańcza and its influents and an outflow. The study was conducted from April to October in the years 1998-2000, at 9 sites situated on the lake (pelagic zone, near-shore waters, ecotonal zone), 4 sites situated on the influents (the Czarna Hańcza and Stara Hańcza Rivers, the Spod Przełomki stream and the stream flowing from Lake Boczniel) and one situated on the Czarna Hańcza River, which flows out of Lake Hańcza. Total Viable Count at 20°C (TYC 20°C) and Total Viable Count at 37°C (TYC 37°C) were used as indicators of pollution, while Total Coli (TC), Faecal (therrnotolerant) Coli (FC) and Faecal Streptococcus - Enterococcus (FS) - as indicators of the sanitary state. The indicator bacteria number in the waters of Lake Hańcza and in the outflowing waters were usually typical of clean surface waters (purity class I). The bacteria number in the water inflowing to Lake Hańcza was much higher than that measured in the water of the lake and was usually similar to the values typical of slightly polluted (purity class II) and heavily polluted waters (purity class III). Throughout the study period, higher indicator bacteria numbers were measured in summer months; in other periods a higher number was found only sporadically. Its increase in subsequent years of study in the water at the established sites may be an indication of the increasing effect of allochtonie factors on the waters of Lake Hańcza.
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Authors and Affiliations

Anna Gotkowska-Plachta
Ewa Korzeniewska
Stanisław Niewolak
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Abstract

Studies were carried out in the summer seasons of l 995-1999 (from June to September) on the quantitative and qualitative composition of Enterobacteriaceae bacteria (including Escherichia coli and Salmonella sp.), and potentially pathogenic bacteria Aeromonas hydrophila, Pseudomonas aeruginosa and Staphylococcus sp. in the water of 8 bathing sites of the Lake Wigry. Aeromonas hydrophila occurred in the all samples of studied water and was the most numerous in water sampled from sites of increased trophic levels. Irrespective of the site and time of sampling Pseudomonas aeruginosa was rarely isolated. In the total of 160 samples of water analysed Salmonella sp.. Escherichia coli and Staphyloccocus aureus were determined in 32 (22.6%), 68 (42.4%) and 90 (55%) samples, respectively. Pathogenic bacteria of the genus Salmonella sp. and potentially pathogenic Staphylococcus aureus and Aeromonas hydrophila identified in the analysed offshore waters (also when Escherichia coli were absent) suggest that the use of the Lake Wigry waters for swimming, falling into account faecal bacterial counts, may not be sufficient to fully reflect safety conditions for bathers. The results of the research suggest that the evaluation of the Lake Wigry surface waters for recreational use should include the frequency of the occurrence of Salmonella sp., Staphylococcus aureus, Aeromonas hydrophila and Pseudomonas aeruginosa. These three species, which arc not directly linked to faecal contamination, can cause various diseases of the skin, nasal and oral cavities, eyes, internal car and other problems in people swimming in contaminated water.
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Authors and Affiliations

Ewa Korzeniewska
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Abstract

The research was carried out on a small (52.8 ha) and shallow (4 m) Lake Track in Olsztyn, exposed to a considerably intense anthropogenic pressure. In the middle 1800s this reservoir was dried out and most of the contiguous land was designated for agricultural purposes. The lake was restored in the mid 1900s. At present, the drainage basin of Lake Track is 216 ha. Urban land comprises the largest portion of this area, i.e. 49.3%, barren land 41.4% and forests 6. I%. The lake receives storm waters but for years it had also received sanitary sewage. The results of this research allowed classifying the lake as nutrient-rich, with fairly advanced eutrophication processes. The waters were characteristic of very high nutrients content, up to 0.75 mg P/dm3 and 3.87 mg N/dm3. The high fertility of Lake Track was additionally confirmed by high BOD, values, i.e. up to 9.5 mg 0/dm3, high chlorophyll content, usually from 30 to 40 mg/m3 but reaching 123 mg/m3, and low water transparency, oscillating between 0.6 and 0.9 m. The reason for the lake's high trophic level was no doubt the excessive loading from the drainage basin. The actual nutrient runoff from the drainage basin to the lake exceeded the critical loads, as defined by Vollenweider. Low quality of the lake's waters and the parallel high external loading indicate that preventive measures should be taken, aimed at reducing the external loading.
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Authors and Affiliations

Jolanta Grochowska
Helena Gawrońska
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Abstract

This study presents the results of investigations, carried out on the Czamiawka River from December 2003 to June 2004. The results indicate the changes of physicochemical parameters of water quality. High concentration of ammonium nitrogen, COD and orthophosphates are probably caused by discharge of municipal waste-water. A drop of ammonium nitrogen, nitrite nitrogen, nitrate nitrogen concentration along the river course is probably caused by inflow of water without these components. High salinity and very high concentration of suspended solids below the "Makoszowy" coal-mine is caused by discharge of coalmine water and carbon dust from coal washer. All of the discussed parameters of water quality (except for pH-index and nitrate nitrogen) are beyond official classification. In comparison to previous analyses a slight improvement of water quality can be observed, especially in the top length. In the estuary water quality deteriorates. Although the Czarniawka River is small, it is one of the most important Kłodnica River contamination sources. Improvement of the existing situation will be possible only if firm waste-water management action will be taken, especially in the "Makoszowy" coal-mine area.
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Authors and Affiliations

Witold Nocoń
ORCID: ORCID
Maciej Kostecki
ORCID: ORCID
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Abstract

In this work the effectiveness of the biotransformation of phosphogypsum in the cultures of sulphatereducing bacteria (SRB) was studied. SRB were isolated from soil contaminated with automobile fuel. The microorganisms were grown by two methods: the enrichment of the cultures and microcosms in: Postgate, minimal medium (with phenol, acetate or lactate) and Emerson medium. All media contained phosphogypsum as electron acceptors. The isolated microorganisms were passage in medium containing different carbon compounds: ethanol, lactate, phenol, acetate casein or lactose to test the effectiveness of biotransformation of phosphogypsum depending on the source of carbon used. In cultures in Postgate medium with lactate or casein there were found the maximal H2S concentration (654 and 540 mg HS-/dm3) and maximal decrease of phosphogypsum 84% and 64%, respectively. The isolated microorganisms utilised alcohol, sugar, protein and phenol.
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