Temat: oxygen aeration efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Accurate oxygen transfer efficiency measurements by off-gas method - tank coverage dilemma
Pomiar sprawności transferu tlenu metodą off-gas - problem stopnia pokrycia reaktora
Autorzy:: Muszyński-Huhajło, M.
Janiak, K.
Powiązania:: https://bibliotekanauki.pl/articles/126006.pdf
Data publikacji:: 2017
Wydawca:: Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:: wastewater treatment
aeration
oxygen transfer efficiency
off-gas method
oczyszczanie ścieków
napowietrzanie
stopień wykorzystania tlenu
metoda off-gas
Opis:: The off-gas method is one of two primary aeration efficiency examination methods. In off-gas method, exhaust air from aeration tank is collected by a floating hood and conveyed to a measurement module. In this part of the installation, gas flow is measured, collected air is dried, stripped of CO2 and subsequently oxygen concentration is measured. The hood area is usually few square meters or even less and is a very small part of the aeration tank area. The main advantage of the off-gas method is that it offers measurement without disturbances to reactor routine work, which are necessary in the case of alternative, absorption method. Thereby, the off-gas method can be used in any circumstances and is free from uncertainty about the influence of reactor disturbances on the obtained results. However, a question remains about the number of measurement points required to obtain representative results for the whole reactor. According to The Environmental Protection Agency (EPA) guidelines, coverage of 2% of the tank area is sufficient, but this number seems insufficient. This article presents an analysis of the influence of tank coverage on the obtained oxygen transfer efficiency values. The presented analysis is based on real data.
Pomiary off-gas są jedną z dwóch dostępnych metod określenia stopnia wykorzystania tlenu w systemach napowietrzania oczyszczalni ścieków. Największą zaletą prezentowanej metody jest możliwość prowadzenia pomiarów w warunkach procesowych bez ingerencji w funkcjonowanie układu oczyszczania ścieków. Na podstawie danych zebranych podczas pomiarów wykonanych na jednej z komunalnych oczyszczalni ścieków w Polsce przeprowadzono analizę wpływu ilości punktów pomiarowych na uzyskiwane wartości stopnia wykorzystania tlenu. Analizę przeprowadzono, wykorzystując wyniki uzyskane z pomiarów zapewniających dużo wyższe pokrycie powierzchni reaktora (odpowiednio 12 i 8,8%) względem wytycznych literaturowych mówiących o 2% stopniu pokrycia reaktora.
Źródło:: Proceedings of ECOpole; 2017, 11, 1; 45-53
1898-617X
2084-4557
Pojawia się w:: Proceedings of ECOpole
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Environmental Quality Management through Parshall Flume Aeration Efficiency Modelling
Autorzy:: Hamed, Mohamed Ahmed Reda
Powiązania:: https://bibliotekanauki.pl/articles/2202322.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: aeration efficiency
dissolved oxygen
environmental life sustainability
Parshall flume
water quality
Opis:: The dissolved oxygen content in surface waters is one of the vital indicators for human water quality usage as well as the aquatic plant and animal environmental life sustainability. Parshall flumes are one of the important ejector devices that are successfully used for oxygen requirement satisfying in various irrigation, wastewater, and ecosystems. However, the present study aimed to manage and improve various waterworks aeration efficiency through integrated modeling of experimental and analytical analysis as well as their operation conditional parameters for the Parshall flumes configuration. On the basis of the experiment work data sets run results, the principal component regression (PCR), partial least squares (PLS), and ridge regression (RR) techniques are used to develop the required aeration efficiency prediction models for such aerators by interrelating the impact of Parshall flumes characteristics and configurations, as well as various water flow rates on aeration efficiency. The predictive models developed in the study were statistically compared to the experimental data. The comparison confirms a good reliability and high accuracy. Considering the proposed aeration models, the optimum design of the new Parshall flumes can be successfully facilitated.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 124--130
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Predictive models for estimation of labyrinth weir aeration efficiency
Autorzy:: Aradhana, Aradhana
Singh, B.
Sihag, P.
Powiązania:: https://bibliotekanauki.pl/articles/1818800.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: labyrinth weir
oxygen aeration efficiency
artificial neural network
ANN
fuzzy logic
ANFIS
efektywność napowietrzania
napowietrzanie
sztuczne sieci neuronowe
logika rozmyta
Opis:: Purpose: The purpose of the study is to estimate the aeration efficiency (E20) of Labyrinth weir using artificial intelligent (AI)-based models. Design/methodology/approach: The aeration efficiency (E20) was collected by using the nine models of Labyrinth weir with different shapes and dimensions. A total of 180 observations were used out of which 126 used to train the AI-based models and the remaining used to test the model. This observation consists of input variables such as Fraud number (Fr), Reynolds number (Re), numbers of keys (N), the ratio of head to the width of the channel (H/W), the ratio of crest length to width of the channel (L/W), the ratio of drop height to width of the channel (D/W) and shape factor (SF) and E20 as the output variables. The AI-based models used were Fuzzy Logic, multi-linear regression (MLR), adaptive neuro fuzzy interface system (ANFIS), and artificial neural network (ANN). Findings: The main findings of this investigation are that ANN is the best AI-based model that can estimate the E20 accurately than MLR, ANFIS, and Fuzzy Logic. Sensitivity analysis depicts that drop height at labyrinth weir is the essential factors for the estimation of E20; further, parametric studies have also been performed. Research limitations/implications: The proposed AI-based models can be used in the estimation of E20 with different shapes of labyrinth weir but still it needs improvement for the different dimensions. Practical implications: The best AI-based model can be used to calculate the E20 with the different values of input variables. Originality/value: There are no such AI-based models such as ANN, ANFIS, and Fuzzy Logic, available in the literature which can estimate the values of E20 accurately.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2021, 105, 1; 18--32
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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