Wyniki wyszukiwania - Biblioteka Nauki

1

The heat exchange character methods of analysis

100%

Piotrowska E. , Skowronski P.

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nr 68

2

The Effect of Bioaugmentation Strategy on the SBR Performance Treating Reject Water and Municipal Wastewater Under Various Temperature Conditions

100%

Szaja A. , Szulżyk-Cieplak J.

Journal of Ecological Engineering

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2021

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tom Vol. 22, nr 7

46--56

EN

In this study, the effect of bioaugmentation on the sequencing batch reactor (SBR) performance while treating municipal wastewater and reject water under various temperature conditions was examined. Two lab-scale SBRs, each with the active volume of 8 L were used to perform this research. For bioaugmentation, a mixture of wildliving Bacteria and Archaea in a dose 0.25 mL was added to SBR A, while SBR B was a control one. Both reactors were fed with a mixture of wastewater and 13% v/v reject water. During the experiment, 5 phases with different temperature range were distinguished, each one lasted 14 d. The temperatures were investigated in 5°C increments, i.e. 20, 25, 30, 25 and 20°C. The obtained results indicated that in the bioaugmented reactor (SBR A), lower concentrations of NH4+–N, TSS, NO2-–N in effluent were observed as compared to control (SBR B). While for NH4+–N, regardless the temperature, the observed differences were statistically significant. Importantly, in both SBRs, the process was carried out in a stable way.

3

Zmiany wielkości wycieku rozmrażalniczego mrożonych warzyw

86%

Palich P. , Pukszta T.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2004

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tom nr 52

42-47

PL

Wskaźnikiem odwracalności procesu zamrażalniczego produktów o budowie tkankowej jest wielkość wycieku. Fluktuacja temperatury jest zjawiskiem występującym we wszystkich ogniwach łańcucha chłodniczego, wpływającym na jakość żywności. Celem podjętych badań była ocena wpływu wahań temperatury na wielkość wycieku rozmrażalniczego. Badania wykazały wpływ fluktuacji temperatury na proces rekrystalizacji, powodujący zmiany struktury komórkowej a tym samym zwiększenie wycieku rozmrażalniczego.

EN

A magnitude of outflow is a reversal rate for a freezing process of tissue construction products. Temperature fluctuation is phenomenon occurrencing in all cells of a cooling chain and influencing on quality of food. Estimation of temperature fluctuation influence on the magnitude of defrosting outflow was a target for undertaken researches. Researches showed the influence of temperature fluctuation on a re-crystallization process causing changes of a cellular structure and thereby enlargement of defrosting outflow.

4

Analysis of water temperature fluctuations in Lake Jamno

72%

Ptak M. , Sojka M. , Choinski A.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2018

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tom 22

EN

The paper presents the analysis of thermal conditions of coastal Lake Jamno. The long observation series (1971-2013) for the course of surface water temperature suggests its considerable warming (0.28°C∙dec-1). In the monthly cycle, an increase in surface water temperature is observed in all cases except for the winter period (December, January, February). Water was heated the fastest in April (0.58°C∙dec-1) as well as May and September (0.46°C∙dec-1). Mean annual air temperature increased at a similar rate (0.27°C∙dec-1), but the coefficient of correlation of both media equalled 0.40. This suggests that other factors could contribute to the change in surface water temperature. One of such factors could be marine water intrusions. The strongest positive correlations of water temperature in Jamno and water level in the Baltic Sea occurred in the cold half-year, and negative in the warm half-year. From 2013, on the canal connecting Lake Jamno with the Baltic Sea, a storm gate was constructed that altered many processes and phenomena occurring in the lake so far. The paper covers the natural (quasi-natural) period of functioning of the lake, and provides a point of reference for future research on its thermal regime considering among others the effect of human pressure in the form of hydrotechnical infrastructure.

PL

W pracy dokonano analizy warunków termicznych przymorskiego jeziora Jamno. Długoterminowy (1971-2013) przebieg temperatury wody wskazuje, że podlegała ona znacznemu ociepleniu (0,28°C∙dek-1). W układzie miesięcznym wzrost temperatury wody notowany jest we wszystkich przypadkach poza okresem zimy (grudzień, styczeń, luty). Najszybciej woda ogrzewała się w kwietniu (0,58°C∙dek-1) oraz maju i wrześniu (0,46°C∙dek-1). W podobnym tempie ogrzewała się średnia roczna temperatura powietrza (0,27°C∙dek-1), lecz współczynnik korelacji obu ośrodków wynosił 0,40, co sugeruje, że inne czynniki mogły wpływać na rozkład temperatury wody. Temperatura wody w Jamnie oraz poziom wody w Bałtyku najsilniejsze pozytywne związki przybierały w półroczu zimowym oraz ujemne w półroczu ciepłym. Od roku 2013 na kanale łączącym jezioro Jamno z Morzem Bałtyckim zostały uruchomione wrota przeciwsztormowe, które zmieniły wiele dotychczasowych procesów i zjawisk odbywających się w tym akwenie. Praca obejmuje swym zakresem naturalny (quasi-naturalny) okres funkcjonowania tego jeziora i stanowi punkt odniesienia dla przyszłych badań nad jego termiką uwzględniającą m.in. wpływ antropopresji w postaci zabudowy hydrotechnicznej.

5

Soil fauna community dynamics during soil thawing period in the subalpine and Alpine forests of Western China

72%

Tan B. , Wu F. , Yang W. , Wang A. , Yang Y.

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nr 4

EN

The frequently changed temperature could have great effects on soil fauna community during soil thawing period in cold areas. Therefore, soil faunas were investigated in both the soil organic layer (OL) and mineral soil layer (ML) in the primary fir (Abies faxoniana) forest (PF), fir and birch (Betula albosinensis) mixed forest (MF) and secondary fir forest (SF) in the eastern Qinghai–Tibet Plateau every ten days between March 5 and April 25, 2009. Soil macrofauna was picked up by hand in the fields. Mesofauna was collected and separated from the soil samples by Baermann and Tullgren methods, respectively. The dominated species of macrofauna belongedto Coleoptera and Diptera at the early stage of soil thawing, and to Coleoptera, Diptera, Araneae and Hymenoptera at the later stage. However, the dominated species of mesofauna belonged to Nematode, Collembola, and Acari in the whole soil thawing. The density, number of taxa, and diversity index of soil fauna showed significant change with temperature fluctuations and reached an obvious peak when soil temperatures rising above 0°C. The density and number of taxa of macrofauna in both the OL and ML were the lowest on March 5 in the three forests, but the density of mesofauna in both the OL and ML was the highest on March 25, except for the ML in the PF. These results implied that soil fauna community was sensitive to temperature fluctuations, which is important in understanding the ecological processes in the winter–spring transitional period.

6

Influence of high temperature in breeding rooms on some physiological indices in chinchillas [Chinchilla lanigera]

58%

Barabasz B. , Szeleszczuk O. , Sechman A.

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nr 1