Autor: Scalize, Paulo - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Reuse of alum sludge for reducing flocculant addition in water treatment plants
Autorzy:: Scalize, Paulo S.
Souza, Leonora M. D.
Albuquerque, Antonio
Powiązania:: https://bibliotekanauki.pl/articles/207340.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: aluminum sulfate
chemicals removal
water treatment
coagulation
flocculation
potable water
sulfur compounds
siarczan glinu
usuwanie chemikaliów
uzdatnianie wody
koagulacja
flokulacja
woda pitna
związki siarki
Opis:: The recycling of water treatment residues (WTR) inside drinking water treatment plants (DWTP) to be a good option for reusing this type of waste, as well as for reducing the costs with its disposal off and with the acquisition of treatment chemicals. Therefore, a WTR was reused for auxiliary of the coagulation-flocculation processes for reducing the use of aluminium sulfate (coagulant) in a DWTP. Three series of experiments have been conducted involving three water samples with different turbidity and colour, different WTR samples with different total suspended solids (TSS) concentrations and different aluminium sulfate concentrations. The results showed that WTR can efficiently be used for the removal of turbidity between 21 NTU and 218 NTU and colour between 194 HU and 1509 HU for TSS concentration between 1635 mg/dm³ and 5420 mg/dm³, with better results in the range between 1635 mg/dm³ and 2678 mg/dm³. For higher TSS concentrations, the removal of both parameters decrease because there are excess of organics released to water, which demands the use of more coagulant.
Źródło:: Environment Protection Engineering; 2019, 45, 1; 57-70
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Identification of Homogeneous Regions of Specific Minimum Flows in the State of Goiás, Brazil
Autorzy:: Basso, Raviel
Santana, Kássia
Honório, Michelle
Costa, Isabella
Leitão, Sanderson
Albuquerque, Antonio
Scalize, Paulo
Powiązania:: https://bibliotekanauki.pl/articles/24201732.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: reference flow
permanence curve
K-means method
flow regionalisation
water management
Opis:: Hydrological information is essential for adequate water resources management as well as for water supply, energy supply, water allocation, among other services. However, this information does not always exist in quantity and quality to be used in hydrological or water management studies, and alternative methods are required to estimate minimum flows. Estimation based on homogeneous regions enables to transfer observation data from a known location to a location without data, but in the same region. Since the fluviometric stations in the state of Goiás (Brazil) are not uniformly distributed, the present work aimed at delimiting homogeneous regions of minimum flows, using the cluster grouping method with the K-means algorithm.Thus, 71 fluviometric stations with at least 5 years of continuous data were selected, obtained from the HIDROWEB system. In addition to the observed data, other variables were considered, such as drainage area, perimeter, specific minimum flows Q7,10, Q90, Q95 and average slope. The use of all these variables together with the observed data made it possible to determine,with great accuracy, 5 homogeneous regions of minimum flows based on the cluster analysis, enabling to obtain the minimum flows of reference for each region.In the selected homogeneous regions, it was possible to observe that the regions with the highest values of average slope presented smaller minimum flows, and the same could be observed under inverse conditions, i.e., lower values of average slope had higher minimum flows.It is also noteworthy that river monitoring is deficient in the center-south and center-north parts of the state of Goiás, making water resources management difficult. This fact indicates, therefore, the need to expand the river monitoring system throughout the state, especially in its southern and northern regions.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 357--367
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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