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Wyświetlanie 1-15 z 23
Tytuł:
Monitoring particle size distribution for water treatment processes
Autorzy:
Zielina, M.
Powiązania:
https://bibliotekanauki.pl/articles/206916.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
light transmission
particle size analysis
water treatment
filtration
przepuszczalność światła
analiza rokładu wielkości cząstek
uzdatnianie wody
Opis:
Efficiencies of unit processes such as flocculation, sedimentation and filtration were analyzed based on particle size distribution in one of the several water treatment plants supplying Cracow (Poland). The predicted efficiencies determined based on concentration of volumetric suspension, nephelometric turbidity and absorbance were compared with each other. Interpretation of the results was proposed based on the Mie scattering theory. The results of theoretical analysis suggested much stronger influence of finer particles on absorbance and nephelometric turbidity than that of larger particles. The experimental results confirmed this suggestion. Hence, the more efficient removal of larger particles during the process resulted in a higher efficiency of the process based on the concentration of volumetric suspension than those predicted based on the nephelometric turbidity or absorbance. For a rapid filtration process, which is strongly dynamic, relation was analyzed for various filter run times.
Źródło:
Environment Protection Engineering; 2016, 42, 3; 167-177
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of UV irradiation on biodegradability of natural organic matter
Autorzy:
Wolska, M.
Powiązania:
https://bibliotekanauki.pl/articles/207943.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
organic carbon
UV irradiation
water treatment
natural organic matters
węgiel organiczny
promieniowanie UV
uzdatnianie wody
naturalne substancje organiczne
Opis:
Changes in concentration of total organic carbon in natural organic matter during UV irradiation have been examined, and especially its biodegradable fraction. The studies have shown better effectiveness of elimination of organic substances for highly contaminated water than that obtained for pre-Treated water. UV irradiation assured the decrease of all fractions of total organic carbon, which indicates the domination of mineralization over the transformation of multi-molecular substances into simpler ones. This means that organic substances were mineralised during UV irradiation. The effective elimination of non-biodegradable dissolved organic substances absorbing UV radiation ensures a very large decrease in potential of disinfection of by-products.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 239-246
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the most effective operating conditions of membrane bioreactor used to industrial wastewater treatment
Autorzy:
Świerczyńska, A.
Bohdziewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/208164.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wastewater treatment
activated sludge process
bioconversion
bioreactors
industrial water treatment
landfill
leachate treatment
water treatment
activated sludge
dairy wastewater
industrial wastewater treatment
membrane bioreactor
municipal landfills
oczyszczalnia ścieków
proces osadu czynnego
biokonwersja
bioreaktory
uzdatnianie wody przemysłowej
uzdatnianie wody
osad czynny
ścieki mleczarskie
oczyszczanie ścieków przemysłowych
bioreaktor membranowy
składowiska odpadów komunalnych
Opis:
The effectiveness of co-treatment of leachates from an old site of municipal landfill with a dairy industry wastewater in a membrane bioreactor has been investigated. The subjects of the study were leachates collected at the municipal landfill in Tychy and dairy wastewaters from Dairy Plant in Bieruń. The determination of the most effective technological parameters of the process, i.e. activated sludge load and its concentration and types of COD fractions in the reactor influent was made. It was shown that the activated sludge load at the level of 0.06 g COD/(gDM·d) was the highest permissible one among all the investigated loads and the process run effectively within the whole investigated range of concentrations of activated sludge in a bioreactor. It was found that in the treated wastewater, the fraction of easily degradable organic compounds was the dominant one.
Źródło:
Environment Protection Engineering; 2015, 41, 1; 41-51
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency of heavy metals removal during roof runoff infiltration through vegetated soil
Autorzy:
Sakson, G.
Powiązania:
https://bibliotekanauki.pl/articles/208054.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
water treatment
cooper
groundwater
heavy metals
infiltration
soil
uzdatnianie wody
miedź
wody gruntowe
metale ciężkie
infiltracja
gleba
Opis:
Stormwater discharged from urban areas can contain significant amounts of heavy metals, especially zinc and copper. Roof runoff is very often directed into the soil and may pose a risk for groundwater quality. Lysimeter research has shown that zinc and copper contained in stormwater may be effectively removed by passing through vegetated soil. The average removal efficiency was greater than 90% and did not depend on the metal concentration in the influent, and the concentrations in the effluent met the limits for drinking water. Infiltration may be a reliable treatment method for roof runoff and may make stormwater safe for groundwater recharge.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 143-154
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of natural organic matter removed from water along with its treatment
Autorzy:
Urbanowska, A.
Kabsch-Korbutowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/206888.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biogeochemistry
biological materials
chemical water treatment
Mokry Dwór
WTP
biogeochemia
materiały biologiczne
chemiczne uzdatnianie wody
Opis:
The object of this study was to examine the nature of natural organic matter (NOM) removed on each stage of water treatment train used in the “Mokry Dwór” Wrocław Water Treatment Plant (WTP) and to compare obtained results with water treatment efficiencies achieved with the use of membrane ultrafiltration, ion-exchange and UF/ion-exchange integrated processes. In the experiments fractional analysis with the use of polymeric resins (DAX-8, XAD-4 and IRA-958) was used. Obtained results have shown that most (56%) of the raw water NOM was found in fraction characterized by presence of humic and fulvic acids (VHA and SHA fractions). VHA fraction made the most of DOC removed in examined water treatment train and coagulation was mainly responsible for this effect. Integrated process consisting of MIEX®DOC ion exchange and PES 10 kDa ultrafiltration turned out to be very effective at high molecular weight hydrophobic compounds removal from water being much less efficient with hydrophilic compounds.
Źródło:
Environment Protection Engineering; 2016, 42, 2; 183-195
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing coagulant choice for treatment technology of surface water for human consumption
Autorzy:
Wolska, M.
Mołczan, M.
Urbańska-Kozłowska, H.
Solipiwko-Pieścik, A.
Powiązania:
https://bibliotekanauki.pl/articles/208212.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
surface treatment
water treatment
coagulation
uzdatnianie wody
koagulacja
uzdatnianie powierzchni
Opis:
Coagulation is a process commonly used in water treatment, especially for surface water. This process aims to effectively remove organic matter [1, 2] especially precursors of oxidation and disinfection by-products [3–5], whose creation potential is related to absorption values at 254 nm (UV254) [6] Due to a very large variability in surface water composition over the course of the year and different contamination levels dependent on water source location, it is important to optimally choose coagulant type and dosage. Such optimization is difficult due to the presence of a large number of coagulants on the market. Świderska-Bróż and Rak [7] and Lee et al. [8] have shown that prehydrolyzed coagulants are less sensitive to changes in temperature and pH of the input water than classic ones. Lin et al. [9] suggest however that the effectiveness of coagulation mainly depends on the type and structure of organic matters present in waters, and to a much lesser degree on pH and temperature.
Źródło:
Environment Protection Engineering; 2018, 44, 4; 131-141
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Denitrifying phosphorus accumulating organisms enrichment and their characteristics in a denitrifying enhanced biological phosphorus removal system
Autorzy:
Zou, H.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/206936.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biological water treatment
wastewater treatment
nitrogen
phosphorus
biologiczne uzdatnianie wody
oczyszczanie ścieków
azot
fosfor
Opis:
Denitrifying phosphorus accumulating organisms (DPAOs) play an important role in simultane-ous removal denitrifying nitrogen (N) and phosphorus (P). Their enrichment and characteristics were investigated. A denitrifying EBPR reactor, performing continuous anaerobic/anoxic conditions, was used to enrich DPAOs in this study. Through 60 days operation, DPAOs was successfully cultivated in the denitrifying EBPR system and P concentration in the effluent was stable and low with less than 0.5 mg/dm3. Energy dispersive spectroscopy (EDS) analysis showed that P content in anoxic end sludge gradually increased with enrichment operation, which accounted for 2.9, 4.7, 6.2, and 7.9 wt. % in sludge samples at day 0 (i.e., seed sludge), and days 20, 40 and 60, respectively. Based on the batch test, a significant positive correlation was found between COD consumption and P release in anaerobic conditions and between nitrogen removal and phosphorus uptake in anoxic conditions. Furthermore, in anaerobic conditions, the P release rate was 4.2 mg P/(g MLSSh) being higher than the P uptake rate (2.8 mg P/(g MLSS h)) in anoxic conditions. Despite this, total anaerobic P release (8.5 mg P/(g MLSS)) was lower than anoxic P uptake total amount (11.2 mg P/(g MLSS)), implying an excess P uptake in anoxic environment. One whole cycle displayed the obviously denitrifying simultaneous nitrogen and phosphorus removal with more than 95% removal efficiencies in the denitrifying EBPR system.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 225-237
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the type of membrane-forming polymer on the membrane fouling
Autorzy:
Świerczyńska, A.
Bohdziewicz, J.
Kamińska, G.
Wojciechowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/208179.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
deionized water
industrial water treatment
water filtration
woda dejonizowana
przemysłowe uzdatnianie wody
obróbka odcieków
filtracja wody
Opis:
The effect of the membrane-forming polymer (PES, PAN and PVDF) on the fouling phenomenon has been investigated occurring on the surface of the ultrafiltration membranes used for the polishing of industrial wastewater pre-treated by biological methods. The activated sludge method in SBR reactor was used to treat dairy wastewater mixed with 10 vol. % of landfill leachate. The susceptibility assessment of polymeric membranes to the fouling phenomenon was carried out using the plate-and-frame membrane module SEPA CF-NP produced by GE Osmonics. The following properties of the mem-brane were determined: the dependence of the volumetric flux of the permeate on the process duration, the transport properties of deionized water, the relative permeability of the membrane for the flux of deionized water and for the wastewater flux, as well as the contact angle of the membranes. It can be concluded that the kind of membrane-forming polymer had an influence on the fouling phenomenon occurring on the ultrafiltration membranes used for the polishing of industrial wastewater treated in a SBR reactor.
Źródło:
Environment Protection Engineering; 2016, 42, 2; 197-210
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of polyaluminium chlorides overdosage on effectiveness of coagulation and filtration
Autorzy:
Gumińska, J.
Kłos, M.
Powiązania:
https://bibliotekanauki.pl/articles/207707.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chemical water treatment
chlorine compounds
coagulation
manganese
manganese removal
water treatment
chemiczne oczyszczanie wody
związki chloru
koagulacja
mangan
usuwanie manganu
uzdatnianie wody
Opis:
PACls overdosage has negative impact on the operation and the effectiveness of coagulation and separation of post-coagulation suspensions. The results of the pilot study revealed that a sharp increase of fine particles was observed at reaching and exceeding the isoelectric point. Based on the full-scale research with PACl_1 (B = 2, 4) it was stated that these particles did not cause deterioration of standard quality parameters (turbidity, absorbance UV254, colour, TOC, CODMn) of water purified in conventional treatment. However, the particles not retained in sedimentation tanks supplied rapid filters and caused their overloading, and hence shortening of filtration cycles.
Źródło:
Environment Protection Engineering; 2015, 41, 1; 5-14
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential of pumice modified with iron(III) for copper removal from aqueous solutions
Autorzy:
Guler, U. A.
Cebeci, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/207939.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption capacities
copper concentration
ion exchange
iron oxides
water treatment
zdolność adsorpcji
stężenie miedzi
wymiana jonowa
tlenki żelaza
uzdatnianie wody
Opis:
Iron-modified pumice (Fe-P) was prepared by the ion-exchange method using natural pumice from Kayseri, Turkey at room temperature without calcination. SEM, FTIR, XRD, and S-BET measurement were used to investigate the copper removal mechanism. The results show that the SBET of the pumice increased from 11.88 m2/g to 21.01 m2/g after iron modification. The effects of pH, contact time, initial copper concentration, temperature, and various cations (Na+, K+, Ca2+, Mg2+ and Al3+) at various pH were investigated in batch experiments. More than 92% of Cu(II) was removed after 180 min. Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models were applied to the equilibrium data at 298, 308 and 318 K. The maximum adsorption capacity at 298, 308 and 318 K was found to be 21.52, 19.48, and 19.67 mg/g, respectively. The kinetics of copper on Fe-P was best described by the pseudo-second order kinetic model. The negative values of free energy change and enthalpy change indicated that the adsorption process was feasible, spontaneous and exothermic.
Źródło:
Environment Protection Engineering; 2017, 43, 3; 165-180
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of nitrates from wastewater using pond bottom soil
Autorzy:
Erbanová, E.
Palarčík, J.
Slezák, M.
Mikulášek, P.
Powiązania:
https://bibliotekanauki.pl/articles/207872.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
denitrification
dissolved oxygen
lakes
nitrate level
water treatment
biological methods
organic substrate
denitryfikacja
rozpuszczony tlen
jeziora
azotany
uzdatnianie wody
metody biologiczne
podłoże organiczne
Opis:
The possibility of the final treatment of mine water from chemical leaching has been investigated. Despite water purification, high nitrate levels remain in these waters and must be removed. The main requirements are the lowest economic, operating and staffing levels. These requirements are best achieved by the removal of nitrates using biological methods, in our case using the pond bottom soil. Experiments were carried out in a batch mode. The effect of the environment on the denitrification process, the influence of the type and amount of the organic substrate and basic parameters of the denitrification such as redox potential, pH and dissolved oxygen were studied.
Źródło:
Environment Protection Engineering; 2016, 42, 2; 145-154
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the possibility of replacing the rapid filtration process with ultrafiltration in surface water treatment systems
Autorzy:
Wolska, Małgorzata
Wisniewski, Jacek A.
Ferenc, Zbigniew
Adamski, Wojciech
Mołczan, Marek
Pawłowska, Magdalena
Szerzyna, Slawomir
Powiązania:
https://bibliotekanauki.pl/articles/2032923.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
water treatment
coagulation
sedimentation
filtration
uzdatnianie wody
koagulacja
sedymentacja
filtracja
Opis:
The presented study aimed to compare the effectiveness of ultrafiltration and filtration through a sand bed during the water treatment process after the coagulation and sedimentation. The study was conducted in two flow-type water treatment systems: the reference and the test system. Both systems functioned continuously with a throughput of 1 m3/h. The research has shown that both processes ensured a very effective removal of post-coagulation suspensions, however, ultrafiltration was more effective. The filtration process allowed a slightly higher removal of organic substances as compared to ultrafiltration. The effectiveness of the removal of organic substances was determined by the biological activity of sand beds, which is not allowed in the ultrafiltration process. Besides, during the filtration process, aluminum remaining after coagulation was more effectively removed. In turn, the ultrafiltration process ensured an almost 100% effectiveness in reducing the total microorganism cell count, while the effectiveness of the filtration process was approximately half of that. In the end, the possibility of replacing the filtration process with the ultrafiltration process is determined by the costs of both processes.
Źródło:
Environment Protection Engineering; 2021, 47, 2; 83-92
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
The role of compost properties in sorption of heavy metals
Autorzy:
Martinho, J.
Campos, B.
Brás, I.
Silva, E.
Powiązania:
https://bibliotekanauki.pl/articles/207347.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chemicals removal
water treatment
composting
copper
heavy metals
municipal solid waste
sewage
poultry manure
sorption
usuwanie chemikaliów
uzdatnianie wody
kompostowanie
miedź
metale ciężkie
stałe odpady komunalne
ścieki
odchody drobiu
sorpcja
Opis:
The feasibility of various composts to operate as sorbents for heavy metals (Cu and Zn) removal from wastewater has been evaluated. Three commercial composts obtained from municipal solid wastes (MWS), sludge sewage (SS) and poultry manure (PM) were selected as potential sorbents. Kinetic and equilibrium tests were conducted in order to assess the equilibrium conditions to remove metals from aqueous samples. For all composts, the maximum time necessary to reach the equilibrium was 240 min. The Freundlich and Langmuir isotherm models were found to fit the sorption data. The SS compost proved to be the one with highest removal capability for both assessed metals, while MWS compost showed to be the less suitable for this purpose. These results can be explained in terms of the compost surface properties, namely, with the cation exchange capacity.
Źródło:
Environment Protection Engineering; 2015, 41, 2; 57-65
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potato waste treatment by microbial fuel cell. Evaluation based on electricity generation, organic matter removal and microbial structure
Autorzy:
Du, H.
Li, F.
Huang, K.
Li, W.
Feng, C.
Powiązania:
https://bibliotekanauki.pl/articles/206898.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
water treatment
performance
technology
bacterial
recovery
sludge
carbon
microbial fuel cell
COD
potato waste
uzdatnianie wody
ChZT
węgiel
odpady ziemniaczane
Opis:
The performance of microbial fuel cell (MFC) in treating potato waste was evaluated using a two-chamber MFC supplied with potato liquid after mastication of market available fresh potato. Evaluation was conducted based on electricity generation, organic matter removal (CODCr, DOC and volatile fatty acids (VFAs)), and microbial structure on the anode and in the anodic solution of the reactor. Current density exhibited a trend that followed the concentration changes of organic matter in the solution, with its highest value being observed as 208 mA/m2. Effective removal of organic matter was also observed. By the end of the experiment, the removal for total COD reached about 84%. Bacterial structure analysis based on PCR, DGGE and sequencing indicated that more species were developed in the anodic solution than on the anode, with Proteobacteria, Firmicutes and Bacteroides being dominant. Geobacter, a well reported exoelectrogenic species, was found more predominant on the anode than in the anodic solution. The results thus indicated that simultaneous stabilization and electricity generation could be achieved when potato waste is treated in MFC.
Źródło:
Environment Protection Engineering; 2017, 43, 1; 5-18
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 23

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