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Badania skuteczności funkcjonowania korytowego systemu podczyszczającego zastosowanego na rzece Młynówka (województwo lubuskie)

Bonisławska M., Rybczyk A., Nędzarek A., Czerniejewski P., Tórz A., Łopata M.

Inżynieria Ekologiczna

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2018

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Vol. 19, nr 3

52--61

PL

Przeprowadzono roczną ocenę funkcjonowania systemu filtrów wypełnionych kształtkami z polipropylenu i keramzytem, usytuowanych w korycie rzeki, których zadaniem była redukcja zawiesin ogólnych oraz biogenów w wodzie przed jej odprowadzeniem do śródmiejskiego jeziora. Wykazano, że z powodu złej konserwacji i małej ilości zabiegów czyszczących, skuteczność systemu znacznie spadła w stosunku do okresu prawidłowej eksploatacji. Dotyczyło to przede wszystkim wyczerpania możliwości zatrzymywania głównego pierwiastka biogennego – fosforu. W okresie monitorowania obiekt utrzymał zdolność do redukcji zanieczyszczeń organicznych, zawiesin i azotu.

EN

An annual assessment pertaining to the functioning of the filter systems filled with polypropylene and gravelite profiles, located in the river bed, to reduce total suspensions and biogenic compounds in the water before it was directed to the city lake, was carried out. It has been shown that due to poor maintenance and a small number of cleaning operations, the efficiency of the system has decreased considerably, comparing to the period of correct operation. This was mainly related to the exhaustion of the ability to retain the main biogenic element – phosphorus. Througout the monitoring period, the facility retained the ability to reduce organic pollutants, suspended solids and nitrogen.

2

Bottom Deposits of Stratified, Seepage, Urban Lake (On the Example of Tyrsko Lake, Poland) as a Factor Potentially Shaping Lake Water Quality

Augustyniak R., Neugebauer M., Kowalska J., Szymański D., Wiśniewski G., Filipkowska Z., Grochowska J., Łopata M., Parszuto K., Tandyrak R.

Journal of Ecological Engineering

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2017

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Vol. 18, nr 5

55--62

EN

The object of the study was Tyrsko Lake (area 18.6 ha, max. depth 30.4 m), located in the western part of Olsztyn (Olsztyn Lakeland). This lake is one of the clear water lakes in Olsztyn, but the progressive deterioration of water quality has been observed during recent years. The phosphorus concentration in the water-sediment interface, phosphorus fractions quantity and the amount of components which can bind this element was investigated in the upper (0–5 cm) layer of deposits. The aim of study was to analyze the potential influence of bottom sediment on the lake water quality. The obtained results revealed that the bottom sediment of Tyrsko Lake can be classified as mixed, silica-organic type, with a relatively high content of iron (over 4% Fe in d.w.). The total phosphorus content was ca. 3.5 mg P g,-1 d.w. on average. Phosphorus in the bottom sediment was bound mainly with organic matter (NaOH-nrP fraction), which had over 50% share in TP. Highly mobile fractions (NH4-Cl-P and BD-P) together only included ca. 5% to 7% TP. The obtained results show that the bottom sediment of Tyrsko Lake can bind phosphorus quite effectively. The calculated internal mineral phosphorus loading during summer stagnation period was 10.9 kg and it was lower that the assessed annual external phosphorus load (22.6 kg). The assessed annual phosphorus loading from both sources was still lower than the critical load according to Vollenweider criteria. However, due to the fact that the internal loading phenomenon is occurring in the lake, it should be taken into consideration that the lake water quality can deteriorate gradually during the longer time perspective. These findings should be accounted for in the future if the potential protection and restoration procedures will be developed.

3

Influence of restoration methods on the longevity of changes in the thermal and oxygen dynamics of a degraded lake

Grochowska J., Brzozowska R., Łopata M., Dunalska J.

Oceanological and Hydrobiological Studies

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2015

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Vol. 44, No. 1

19--27

EN

The study was conducted on Lake Długie, located in the city of Olsztyn, which for 20 years received raw domestic sewage (400 m3 per day). After preliminary conservation operations, the lake was restored by artificial circulation and phosphorus inactivation methods. During artificial circulation, water temperature in the whole lake volume was equalized. The disconnection of the compressor stimulated the return to typical thermal parameters in the lake. Phosphorus inactivation did not affect the thermal regime in the lake. Artificial circulation caused an increase in the oxygen content in the whole lake, lowered the oxygen-depletion rate during stagnation, and shortened the duration of anaerobic conditions in the near-bottom waters. Phosphorus inactivation did not directly affect the content of oxygen. However, after the coagulant was added to the lake, the oxygenation of the water was further improved owing to the depressed photosynthesis caused by drastically reduced availability of phosphate for primary producers.

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Możliwości rekultywacji jezior o różnych cechach morfometrycznych za pomocą koagulantów glinowych i żelazowych

Łopata M., Gawrońska H.

Technologia Wody

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2012

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Nr 4 (18)

44-45

PL

Michał Łopata 1 Ą fiatach 2001-2012 Katedra Inżynierii Ochrony Środowiska UWM w Olsztynie przygotowała i prze- Helena Gawrońska prowadziła pięć projektów rekultywacji jezior metodą inaktywacji fosforu. Zabiegom poddano jeziora o różnych typach hydrologicznych i zróżnicowanej morfometrii (tab. 1). Jako czynnika wiążącego fosfor we wszystkich przypadkach użyto chlorku poliglinu PAX 18 i w dwóch przypadkach siarczanu żelaza PIX 113. Na całość doświadczeń złożyło się czternaście aplikacji w pełnej skali technicznej.

5

Changes in the phytoplankton community of a lake restored with phosphorus inactivation (Lake Głęboczek, northern Poland)

Jaworska B., Gawrońska H., Łopata M.

Oceanological and Hydrobiological Studies

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2009

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Vol. 38, No.1

93-101

EN

The study applied qualitative and quantitative phytoplankton analysis as a tool for determining algal community characteristics and identifying the directions and general trends of changes caused by the restoration of Lake Głęboczek through phosphorous inactivation before and during its application. The method applied in the studied lake aimed at reducing phosphorous availability through the chemical precipitation of its excess mineral forms in the water body and limiting their mobility in the bottom sediments. Restoration efforts led to shifts in the phytoplankton domination structure followed by the inhibition of blue-green algae development. In consequence, a significant decrease was recorded in the growth rate of the phytoplankton community.

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Trwałość odnowy Jeziora Długiego metodą inaktywacji fosforu ( Pojezierze Mazurskie)

Gawrońska H., Łopata M.

Gaz, Woda i Technika Sanitarna

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2009

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Nr 9

21-22

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Phosphorus immobilization in Lake Głęboczek following treatment with polyaluminum chloride

Łopata M., Gawrońska H.

Oceanological and Hydrobiological Studies

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2008

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Vol. 37, No.2

99-105

EN

In 2001-2003, a survey was conducted of the effectiveness of restoration in the heavily eutrophic polymictic Lake Głęboczek, located in Tuchola. The application of the phosphorus inactivation method with polyaluminum chloride PAX 18 resulted in the complete removal of phosphates, and in a considerable (up to 50-60%) reduction of total phosphorus in the lake water. The sorptive capacity of the bottom sediments was enhanced after the restoration, particularly in the top layer (0-5 cm). An increase of the aluminum content and of mineral forms of phosphorus was observed, mainly the aluminum-bound fraction (at its greatest, by over 330%). The amount of mobile phosphorus in the sediments decreased by 40%. The evidence of the durable immobilization of phosphorus in the aquatic ecosystem was the limited phosphorus release from the bottom sediments. This was confirmed by a significant decrease of total phosphorus in the interstitial waters (from 4-6 mg dm-3 to 2-3 mg dm-3), and by a practically complete removal of phosphates from the near-bottom waters.

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Rekultywacja Jeziora Wolsztyńskiego metodą inaktywacji fosforu

Gawrońska H., Lossow K., Łopata M., Brzozowska R., Jaworska B.

Przegląd Komunalny

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2007

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nr 6

75-78

PL

Główną przyczyną degradacji Jeziora Wolsztyńskiego byty wpływające przez wiele lat nieoczyszczone ścieki bytowe oraz zanieczyszczenia obszarowe. Mimo odcięcia ich dopływu i ograniczenia ładunków zanieczyszczeń wprowadzanych do jeziora jakość jego wód nie uległa większym zmianom. Wskazuje to na istotną rolę zasilania wewnętrznego, a to z kolei na potrzebę rekultywacji zbiornika.

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Wpływ zlewni na stan troficzny Jeziora Luteckiego

Gawrońska H., Lossow K., Łopata M.

Inżynieria Ekologiczna

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2005

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Nr 13

62-63