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    Wyświetlanie 1-8 z 8
    Tytuł:
    The effect of products of adhesive wastewater oxidation with Fentons reagent on biological treatment in SBR
    Autorzy:
    Piaskowski, K.
    Nowak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207366.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    bioremediacja
    oczyszczanie ścieków
    procesy utleniania
    oczyszczanie biologiczne
    utlenianie chemiczne
    oczyszczanie ścieków przemysłowych
    ścieki przemysłowe
    bioremediation
    wastewater treatment
    oxidation processes
    biological purification
    biological treatment
    chemical oxidation
    industrial wastewater treatment
    industrial wastewaters
    Opis:
    The advanced oxidation process with Fenton’s reagent can be used in industrial wastewater treatment, especially for the degradation of not easily biodegradable contaminations. Chemical oxidation of industrial wastewater or other substances as a pre-treatment before biological purification is the most effective method of wastewater treatment. However the Fenton process requires low pH of wastewater and final neutralization with a big amount of iron-containing precipitate. Thes paper presents laboratory experiments dealing with the treatment of adhesive wastewater in an sequencing batch reactor following the Fenton process without final neutralization.
    Źródło:
    Environment Protection Engineering; 2013, 39, 4; 51-62
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of composition of raw wastewater on removal of nitrogen compounds in multistage treatment wetlands
    Autorzy:
    Gajewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207951.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chemicals removal
    water treatment
    biodegradation
    biological water treatment
    nitrogen
    nitrogen compounds
    nitrogen removal
    organic pollutants
    wastewater treatment
    wetlands
    biological treatment
    usuwanie chemikaliów
    uzdatnianie wody
    biodegradacja
    biologiczne oczyszczanie ścieków
    azot
    związki azotu
    usuwanie azotu
    zanieczyszczenia organiczne
    oczyszczalnia ścieków
    mokradła
    oczyszczanie biologiczne
    Opis:
    Influence of composition of raw wastewater on the efficiency of organic matter and nitrogen removal in multistage treatment wetlands has been examined. Commonly used indicators, like COD/BOD5 and BOD5/TN ratio, determining wastewater susceptibility to biodegradation in conventional treatment technologies were assessed. It was confirmed that multistage treatment wetland may be used for treatment of wastewater with high loads of organic pollutants and unfavorable composition for a biological treatment expressed by the ratio of COD/BOD5 and BOD5/TN equal to 2.7 and 0.7, respectively.
    Źródło:
    Environment Protection Engineering; 2015, 41, 3; 19-30
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fraction of heavy metals in sludges from typical coking wastewater treatment plants by modified BCR sequential extraction procedure
    Autorzy:
    Diao, C. P.
    Wei, C. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/207538.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    absorption spectroscopy
    biological water treatment
    BRC
    heavy metals
    spektroskopia absorpcyjna
    biologiczne oczyszczanie wody
    metale ciężkie
    Opis:
    Fractions of 8 heavy metals (Cd, Cr, Hg, Cu, Zn, Pb, Ni and As) in sludges from two typical coking wastewater treatment plants were determined by atomic absorption spectroscopy (AAS) using the modified the European Community Bureau of Reference sequential extraction procedure as the pretreatment technology. The sludges from biological, coagulation deposition units and the discharged sludges of two plants were sampled and the exchangeable, reducible, oxidable, residual fraction and the total content were determined. The oxidable or residual fraction was the predominant fraction in various sludges and on the contrary that the values of the exchangeable and reducible fractions were much lower. Poor biological availability and low potential environment risk of heavy metals was found in sludges from typical coking wastewater treatment plants. Further results of cluster analysis conducted by SPSS that the units with similar conditions could be classed together identified that the unit condition was one key factor affecting on the fraction of heavy metals in sludges.
    Źródło:
    Environment Protection Engineering; 2017, 43, 4; 191-207
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of highly polluted cosmetic wastewater
    Autorzy:
    Naumczyk, J.
    Marcinowski, P.
    Bogacki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/206908.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    coagulation
    cosmetic wastewater
    sedimentation
    Fenton method
    biological wastewater treatment plants
    ścieki kosmetyczne
    koagulacja
    sedymentacja
    biologiczne oczyszczanie ścieków
    metoda Fentona
    Opis:
    Three samples of cosmetic wastewater from the production of soaps and shampoos were treated by the following processes: coagulation with sedimentation (C/S), coagulation with dissolved air flotation (C/DAF), and the Fenton process (FP). The COD values of raw wastewater samples were 13 160, 13 580 and 9410 mg O2/dm3. The anionic surfactants were 3000, 4500 and 4000 mg/dm3, for samples 1, 2, and 3, respectively. All three processes were effective in highly polluted cosmetic wastewater treatment. The most effective process was coagulation. In the case of sample 1, application of FeCl3 at pH 6.0 resulted in 88.2% of COD removal and the application of aluminum based coagulants allowed for 80.1–85.3% COD removal. In the case of samples 2 and 3, the usage of Al 1019 and Al 3010 coagulants brought about a 91.6% and 82.6% decrease in COD values, respectively. C/DAF was found to be less effective than C/S. The best results with C/DAF were obtained using Al 3010 coagulant with wastewater recirculation the COD removal efficiency amounted to 82.3, 87.3 and 78.8, respectively. The lowest COD removal efficiency was observed for FP and it was equal to 64.0 and 72.7% for samples 2 and 3, respectively.
    Źródło:
    Environment Protection Engineering; 2017, 43, 2; 25-40
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological treatment of hydrogen sulfide in an airlift bioreactor with direct gas injection
    Autorzy:
    Zytoon, M. A.
    El-Shazly, A. H.
    Noweir, M. H.
    Al-Zahrani, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/206930.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydrogen sulfide
    bioreactors
    airlift bioreactor
    removal efficiency
    bioconversion
    biological treatment
    siarkowodór
    bioreaktory
    bioreaktor airlift
    bioreaktor z podnośnikiem powietrznym
    biokonwersja
    biologiczne oczyszczanie
    skuteczność usuwania
    usuwanie siarkowodoru
    Opis:
    Bioconversion of H2S into elemental sulfur has been investigated using an airlift bioreactor with direct injection of the gas into the bioreactor. Almost complete removal of H2S has been achieved at its inlet concentrations lower than 25 000 ppm. Maximum bioconversion capacity of ca 111.3 g/(m3·h) and up to 93.5% conversion of the inlet sulfide to elemental sulfur was obtained. To further improve the bioreactor performance, factors influencing mass transfer and biological activity should be investigated in future studies.
    Źródło:
    Environment Protection Engineering; 2015, 41, 4; 131-142
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the operation of the full scale wastewater treatment plant with use of a complex activated sludge model
    Autorzy:
    Liwarska-Bizukojc, E.
    Biernacki, R.
    Gendaszewska, D.
    Ledakowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/207994.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    activated sludge
    effluents
    wastewater treatment
    water treatment plants
    biological waste water treatment
    wastewater treatment plants
    osad czynny
    ścieki
    stacje uzdatniania wody
    biologiczne oczyszczanie ścieków
    oczyszczalnie ścieków
    Opis:
    A complex activated sludge model implemented in BioWin software has been implemented to assure its predictability and improve the effectiveness of biological wastewater treatment in the full-scale plant in Poland. The influence of temperature and sludge retention time (SRT) on the quality of the effluent was also studied. The calibration was successfully performed according to the Good Modelling Practice Unified (GMP) protocol. Five parameters at a steady state and ten under dynamic conditions were calibrated. It occurred that in the studied wastewater treatment plant SRT should be kept at the low level sufficient to sustain nitrification.
    Źródło:
    Environment Protection Engineering; 2013, 39, 1; 183-195
    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:
    Enrichment of PAO and DPAO responsible for phosphorus removal at low temperature
    Autorzy:
    Haiming, Z.
    Xiwu, L.
    Abualhail, S.
    Jing, S.
    Qian, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/207785.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wastewater treatment
    phosphorus removal
    bacteria
    batch reactors
    aerobic condition
    polyphosphate accumulating organisms
    PAO
    denitrifying polyphosphate accumulating organisms
    DPAO
    oczyszczanie ścieków
    usuwanie fosforu
    bakteria
    reaktory wsadowe
    warunki beztlenowe
    analiza mikrobiologiczna
    biologiczne usuwanie fosforu
    organizmy akumulujące polifosforany
    Opis:
    A new strategy of enrichment of polyphosphate accumulating organisms (PAO) and denitrifying polyphosphate accumulating organisms (DPAO) at low temperature ranging from 8 °C to 11 °C was demonstrated through two lab-scale reactors operated in sequential anaerobic-aerobic (AO) or anaerobic-anoxic (AA) conditions. It was found that the AO reactor is able to achieve a good phosphorus removal performance after 40 days of operation, while a similar stable phosphorus removal can be obtained in the AA reactor after 80 days. This result suggests that the enrichment of PAO was easier than that of DP AO at low temperature. Through switching batch tests, when DPAO is exposed to aerobic conditions, it can immediately exhibit a good phosphorus removal similar to that under anoxic conditions, while PAO can only present poor phosphorus removal when exposed to anoxic conditions, suggesting that two different types of Accumulibacter were enriched both in AA and AO reactors. Microbial analysis with fluorescence in situ hybridization (FISH) and DAPI (4',6-diamidino-2 -phenylindole) staining revealed that Accumulibacter was dominant both in the two reactors, accounting for 61.6% and 79.3% of all bacteria in AA and AO reactors, respectively. Although the different amount of Accumulibacter was enriched in the two reactors, the similar microbial morphologies were observed by using scanning electron micrograph (SEM), both presenting long-rod morphology. This kind of Accumulibacter may display affinities for sodium acetate used as the carbon sources here. This strategy proposed in this study was shown to be effective in achieving a very high enrichment of Accumulibacter at low temperature by linking chemical analysis with microbial observation.
    Źródło:
    Environment Protection Engineering; 2014, 40, 1; 67-83
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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