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    Wyświetlanie 1-9 z 9
    Tytuł:
    Composting and anaerobic digestion technologies as methods for reduction of virus transmission in the environment
    Autorzy:
    Ligocka, A.
    Paluszak, Z.
    Gut, W.
    Tematy:
    viruses
    waste treatment
    anaerobic digestion technology
    thermophilic fermentation
    virus transmission
    waste treatment process
    produkty uboczne fermentacji
    wirusy
    unieszkodliwianie odpadów
    technologia beztlenowa fermentacja
    kompostowanie
    proces fermentacji
    transmisja wirusa
    proces obróbki odpadów
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/208162.pdf  Link otwiera się w nowym oknie
    Opis:
    Survival of bovine enterovirus was studied in animal by-products subjected to sanitization processes. Composting technology and anaerobic digestion under mesophilic (37 °C) and thermophilic (55 °C) conditions were tested in terms of their effectiveness. Viruses were introduced into the biomass in the course of waste treatment processes and virus titres were determined at appropriate time intervals. Technology which allowed the most effective virus elimination, after 2 h, was thermophilic fermentation. During composting, bovine enterovirus survival ranged from 12 to 17 days, whereas the survival time for mesophilic fermentation was 28 days.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of internal recycle ratio on the denitrification process and nirS-containing bacteria of an anaerobic/anoxic/oxic (A2/O) wastewater treatment process
    Autorzy:
    Yan, Xu
    Zheng, Jiaxi
    Han, Yunping
    Liu, Jianwei
    Sun, Jianhui
    Tematy:
    COD
    wastewater treatment
    denitrification process
    internal recycle
    ChzT
    oczyszczanie ścieków
    proces denitryfikacji
    recykling wewnętrzny
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207970.pdf  Link otwiera się w nowym oknie
    Opis:
    Internal recycle (IR) ratio is an important operation parameter for the anaerobic/anoxic/oxic (A2O) wastewater treatment process. Three laboratory-scale A2O wastewater treatment processes with IR ratios 100%, 200%, and 300% were set up to study its influence on the denitrification process and nirS gene-containing bacteria. Results showed theremoval rate of chemical oxygen demand (COD), ammonia nitrogen (NH4 +-N), total nitrogen (TN) and total phosphorus (TP) increased at different levels as the IR rate augmented from 100% to 300%. NirS gene numbers were increased from 1.8×108 to 3.2×108 copies/g MLSS, which was positively correlated with the denitrification rate in anoxic areas. Moreover, similarities were observed in the community structures of denitrifying bacteria that contained the nirS gene under different operation modes. These results indicated that increasing the IR rate in the A2O treatment process could benefit nirS gene-containing bacteria and improve denitrification ability observably while maintaining the stability of the community structure of the system.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of the pistachio processing wastewater using Fenton’s, ultrasound with Fenton’s, and coagulation processes
    Autorzy:
    Demir, O.
    Rastgeldi, B.
    Tematy:
    Fenton process
    ultrasound irradiation
    wastewater treatment
    pistachio processing
    proces Fentona
    napromieniowanie ultradźwiękowe
    oczyszczanie ścieków
    przetwarzanie pistacji
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207507.pdf  Link otwiera się w nowym oknie
    Opis:
    Pistachio processing wastewater was characterized and the treatability of wastewater using Fenton’s process, the combination of Fenton’s process with ultrasonic irradiation and coagulation processes was investigated. [Fe2+] = 27.6 mg/dm3, [H2O,sub>2]= 30 mg/dm3 and 75 min of reaction time were determined as the optimum conditions for Fenton’s process. Then, the combined treatment (ultrasound with Fenton’s process, was applied to the pistachio processing wastewater and 45% of COD removal efficiency was obtained. For the coagulation process, the optimum removal efficiencies of 60% and 45% were achieved for FeCl3 dosage of 2000 mg/dm3 and Al2(SO4)3 dosage of 3000 mg/dm3, respectively. The results demonstrate that higher COD removal efficiencies could be obtained from the combined ultrasound and Fenton’s process with respect to Fenton’s process alone. Besides, applying the coagulation process using FeCl3and Al2(SO4)3 also presents high COD removal efficiencies.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advanced oxidation treatment of pentoxifylline in aqueous solutions
    Autorzy:
    Kamińska, B.
    Skwierawska, A.
    Kozłowska-Tylingo, K.
    Tomczak-Wandzel, R.
    Pazik, A.
    Majewska, K.
    Tematy:
    copper(III)
    Fenton process
    sewage treatment plant
    toxicity
    pharmaceuticals
    reakcja Fentona
    miedź(III)
    farmaceutyki
    toksyczność
    oczyszczalnia ścieków
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207333.pdf  Link otwiera się w nowym oknie
    Opis:
    The degradation of pentoxifylline (PTX) using H2O2, UV, H2O2/UV, Fenton and photo-Fenton processes has been examined in aqueous solutions. The influence of oxidation agent and initial PTX concentration, on H2O2, H2O2/UV, Fenton and photo-Fenton reactions was investigated. The addition of inorganic ions (Cl–, NO3–, SO42– and CO32–) on the degradation efficiency of PTX was tested for H2O2/UV, Fenton and photo-Fenton processeses. The results indicate that the photo-Fenton reaction is the most sufficient for PTX removal. The complete pharmaceutics decomposition is achieved after 5 min under optimized concentration of FeSO4,·7 H2O2 and H2O2. The degradation of PTX is inhibited in the presence of inorganic matter in H2O2/UV and Fenton reaction. In the photo-Fenton process addition of above compounds does not affect the reaction rate. Structures of ten products of photo-Fenton reaction have been proposed.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Failure of the side-stream deammonification process. Risk of violation of the WWTP effluent quality
    Autorzy:
    Janiak, J.
    Miodoński, S.
    Muszyński-Huhajło, M.
    Tematy:
    activated sludge process
    effluents
    wastewater treatment
    water quality
    proces osadu czynnego
    ścieki
    oczyszczanie ścieków
    jakość wody
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207349.pdf  Link otwiera się w nowym oknie
    Opis:
    Stable and efficient nitrogen removal is one of main goals of wastewater treatment. Applying deammonification, beyond many advantages, results in the risk of the WWTP effluent quality violation in case of the failure of the process. Then nitrogen load to activated sludge is increasing rapidly which could therefore lead to quality violation in activated sludge effluent. Simulation studies have been presented on the effect of deammonification failure on nitrogen removal performance in the case of a typical, medium sized WWTP (ca. 115 000 PE). The studies were based on the calibrated ASMI model of real WWTP and a fictional scenario of implementing deammonification and subsequent failure. Implementing deammonification enables SR T optimization of the sludge retention time (SRT) in its main line thanks to lower nitrogen load. Two scenarios have been shown, considering or not optimization of the SRT in WWTP. The results show that SRT optimization leads to decrease in nitrifier mass and raises difficult issues in appropriate nitrogen concentration in the effluent.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of ultrafiltration and nanofiltration processes for the elimination of three selected emerging contaminants: amitriptyline hydrochloride, methyl salicylate and 2-phenoxyethanol
    Autorzy:
    Benítez, F. J.
    Real, F. J.
    Acero, J. L.
    Casas, F.
    Tematy:
    COD
    municipal wastewater treatment plants
    water quality
    filtration process
    ChzT
    miejskie oczyszczalnie ścieków
    jakość wody
    proces filtracji
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207379.pdf  Link otwiera się w nowym oknie
    Opis:
    Three emerging contaminants: amitriptyline hydrochloride (AH), methyl salicylate (MS) and 2-phenoxyethanol (PE) were treated by means of filtration processes for their elimination from ultrapure (UP) water in a first stage, and from three water matrices (surface water from a reservoir, and two effluents from two municipal wastewater treatment plants) in a second stage. For this purpose, ultrafiltration and nanofiltration membranes were used in a cross-flow laboratory equipment. The permeate fluxes at the steady state were determined, and the resistances to the permeate flux were established. It was found that the inherent resistance of the clean membranes provided a much larger resistance than the fouling resistance. The retention coefficients for each individual contaminant were evaluated, as well as the retention coefficients referred to three water quality parameters: absorbance at 254 nm, COD and TOC. These parameters provide the effectiveness of the filtration processes for the elimination of the organic matter present in the selected water matrices.
    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.
    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
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/208164.pdf  Link otwiera się w nowym oknie
    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.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The new concept of MIEX® resin dose categories. Swelling effect, reactor steady-state balance, and NOM removal process control
    Autorzy:
    Mołczan, Marek
    Tematy:
    ion exchange resin
    process control
    purification
    river
    water treatment
    demineralized water
    magnetic adsorbents
    Ion exchange
    żywica jonowymienna
    kontrola procesu
    oczyszczanie
    rzeka
    uzdatnianie wody
    woda demineralizowana
    adsorbenty magnetyczne
    wymiana jonowa
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/58971810.pdf  Link otwiera się w nowym oknie
    Opis:
    The use of powdered adsorbents for water purification has many advantages and one major drawback – lack of regeneration due to difficulty in separating powdered particles. This weakness is attempted to be broken by powdered magnetic adsorbents, in particular magnetic ion exchange resins, used to remove natural organic matter (NOM) from water. In this water treatment process, NOM removal is controlled by the adsorbent content in the reactor (adsorbent dose) and the degree of its saturation. The control over the dose and saturation is done by mutual relations between the regenerated resin stream directed to the reactor and the saturated resin stream received from the reactor. An obstacle in balancing these streams is a variable volume of the adsorbent resulting from its varied swelling, depending on the features of the solution and saturation of the adsorbent. For this reason, it was proposed to distinguish new resin dose and content categories adequate to these changes, the use of which allows full control of both streams. Thus, the reactor feed stream was associated with relative fresh resin content (RRC) and relative fresh resin dose (RRD), which indicate the volume occupied by the regenerated adsorbent in the solution of water during purification. However, the stream received from the reactor was associated with saturated resin content (SRC) and saturated resin dose (SRD), which indicate the volume occupied by saturated adsorbent in the solution of water under treatment. In turn, these two categories of contents/doses are related to the swelling degree (ηSR). Another role was assigned to the third dose category, which is absolute fresh resin dose (ARD), referring to the volume occupied by the regenerated adsorbent in the solution of demineralized water. Thanks to two key features with reference properties (demineralized water, regenerated adsorbent), ARD allows one to transfer laboratory results to practice and to compare the results of various research. The resin loss factor described by the ηLS indicator was also included in this structure.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of pesticides and inorganic pollutants by reverse osmosis
    Autorzy:
    Šír, M.
    Podhola, M.
    Patočka, T.
    Honzajková, Z.
    Kocurek, P.
    Bystrianský, M.
    Vurm, R.
    Kubal, M.
    Tematy:
    groundwater
    groundwater pollution
    pesticides
    reverse osmosis
    water treatment
    batch process
    chlorinated pesticides
    inorganic pollutants
    polyamide membranes
    wody gruntowe
    zanieczyszczenie wód gruntowych
    pestycydy
    odwrócona osmoza
    uzdatnianie wody
    proces wsadowy
    chlorowane pestycydy
    zanieczyszczenia nieorganiczne
    membrany poliamidowe
    Pokaż więcej
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Powiązania:
    https://bibliotekanauki.pl/articles/207770.pdf  Link otwiera się w nowym oknie
    Opis:
    Contamination of soil and groundwater with pesticides is mainly caused by old ecological burdens. This study focuses on the treatment of groundwater contaminated with chlorinated pesticides. The contaminants mainly include α-HCH, β-HCH, γ-HCH, HCB, DDE, DDD and DDT. Reverse osmosis technology using RO98pHt polyamide membranes was used to remove the pollutants under batch process conditions. The observed rate of removal ranged from 98.4% to 99.7%. Total dissolved content solids decreased from 1.35 g/dm3 to below 0.05 g/dm3.
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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