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Tytuł:
Application of advanced oxidation process (H2O2/UV) for removal of organic materials from pharmaceutical industry effluent
Autorzy:
Azizi, E.
Fazlzadeh, M.
Ghayebzadeh, M.
Hemati, L.
Beikmohammadi, M.
Ghaffari, H. R.
Zakeri, H. R.
Sharafi, K.
Powiązania:
https://bibliotekanauki.pl/articles/207937.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
oksydacja
ścieki farmaceutyczne
substancje organiczne
odpady farmaceutyczne
ChzT
bioreaktor
amoxicillin
UV/H2O2
COD
przemysł farmaceutyczny
waste water
membrane bioreactor
UV/H2O2 process
reactor
mineralization
pharmaceutical industry effluent
Opis:
Pharmaceutical wastewater is one of the major complex and toxic industrial effluents containing little or no biodegradable organic matters. In this study, H2O2/UV based advanced oxidation process (AOP) was used to remove organic materials from pharmaceutical industry effluent. For the chemical oxygen demand (COD) removal radiation of medium pressure mercury vapor UV lamp was used in the presence of hydrogen peroxide (H2O2/UV). Results indicated that the efficiency of COD removal depends on the initial concentration H2O2, oxidation time and pH. The efficiency of COD removal at low H2O2con-centration was very low even coupled with UV light, which can be attributed to the low generation of hydroxyl radicals (OH). At high concentration of H2O2 (500 mg/dm3) and optimum pH (pH = 4), 87.6% removal efficiency could be achieved during 70 min oxidation. For high concentration of H2O2 (500 mg/dm3) at pH 3 and 7, the maximum COD removal efficiency was 28.5% and 15.2% respectively, indicating significant roles of pH and H2O2concentration in the process of COD removal.
Źródło:
Environment Protection Engineering; 2017, 43, 1; 183-191
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany ekotoksyczności roztworów zawierających sulfonamidy w trakcie procesu zaawansowanego utleniania
Changes in ecotoxicity of sulfonamides solutions during the advanced oxidation process
Autorzy:
Baran, W.
Adamek, E.
Ziemiańska, J.
Makowski, A.
Sobczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/125796.pdf
Data publikacji:
2012
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
sulfonamidy
ekotoksyczność
procesy zaawansowanego utleniania
sulfonamides
ecotoxicity
advanced oxidation processes
Opis:
Procesy zaawansowanego utleniania (AOP) są często wykorzystywane do degradacji zanieczyszczeń odpornych na biodegradację i silnie toksycznych. Przykładem takich substancji są sulfonamidy zaliczane do syntetycznych chemioterapeutyków o działaniu bakteriostatycznym. Aby zastosowanie procesów AOP było uzasadnione, ważne jest, by ich produkty charakteryzowały się niższą ekotoksycznością niż substraty. Celem pracy była ocena ekotoksyczności sulfanilamidu i sulfametoksazolu oraz produktów reakcji ich utleniania za pomocą rodników hydroksylowych (HO•). Źródłem rodników była reakcja fotokatalityczna prowadzona w obecności TiO2. Ocenę ekotoksyczności wykonywano, wykorzystując standaryzowany test MARA® i procedury jego producenta. Test ten wykorzystuje jako bioindykatory dziesięć wyizolowanych szczepów bakteryjnych i drożdże. Stwierdzono, że większość bioindykatorów była praktycznie niewrażliwa na badane sulfonamidy do stężenia 500 μmol dm–3. Mikroorganizmami wrażliwymi w znacznie większym stopniu od pozostałych były szczepy Microbacterium spp. oraz Citrobacter freudii. Minimalne stężenia hamujące wyznaczone względem tych szczepów dla sulfanilamidu i sulfametoksazolu wynosiły odpowiednio 15 μmol dm–3 (Microbacterium spp.) i 19 μmol dm–3 (C. freudii). Stwierdzono również, że wypadkowy efekt inhibicyjny badanych próbek malał w trakcie trwania AOP, jednak znacznie wolniej niż towarzysząca mu degradacja sulfonamidów. Najsilniej efekt ten obserwowany był u mikroorganizmów bardziej wrażliwych na sulfonamidy. Jednak w pojedynczych przypadkach w trakcie AOP obserwowano również wzrost inhibicji w badanych roztworach.
Advanced oxidation processes (AOP) are often used to degrade of organic pollutants that are resistant to biodegradation and highly toxic. Examples of such substances are sulfonamides classified as synthetic chemotherapeutics agents having a bacteriostatic effect. However, the application of AOP is useful and proper only when the resulting products will be less ecotoxic than substrates. The purpose of our study was to compare the ecotoxicity of sulfanilamide and sulfamethoxazole and products of their oxidation by hydroxyl radicals (HO•). These radicals were generated during the photocatalytic reaction carried out in the presence of TiO2. Ecotoxicological assessment was determined using a standardized MARA® toxicity test kit and procedures recommended by the test manufacturer. In MARA® test, eleven genetically diverse microorganisms (ten strains of bacteria and one yeast) are used as bioindicators. It was found, that the most of bioindicators was practically insensitive to sulfonamides investigated at concentrations to 500 μmol dm–3. Microbacterium spp. and Citrobacter freudii were much more sensitive microorganisms than the others. The minimum inhibitory concentrations (MTC) determined against these strains to sulfanilamide and sulfamethoxazole were 15 μmol dm–3 (Microbacterium spp.) and 19 μmol dm–3 (C. freudii), respectively. Additionally, it was found that the resultant inhibitory effect on the growth of tested microorganisms decreased during the AOP, but it was much slower than accompanying degradation of sulfonamides. The strongest effect was observed with microorganisms more sensitive to sulfonamides. However, in a few cases it was observed the increase in the inhibition during the AOP.
Źródło:
Proceedings of ECOpole; 2012, 6, 1; 313-318
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of catalytic processes for biodiesel production wastewater treatment
Autorzy:
Borralho, Teresa
Coelho, Solange
Estrelo, Andreia
Powiązania:
https://bibliotekanauki.pl/articles/205024.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cobalt
chemical oxygen demand
Fenton process
biodiesel production wastewater
catalytic advanced oxidation process
potassium monopersulphate
Opis:
The study of the possibility of removing organic compounds from wastewater originating from the biodiesel purification stage by two catalytic processes, HSO5-/transition metal and Fenton method has been presented. The source of the ion HSO5-is potassium monopersulphate (2KHSO5∙KHSO4∙K5SO4) (Oxone) that may be decomposed into radicals (OH., SO4-., SO5-.) by means of transition metal as Co(II). Different concentrations were used for both compounds and the combination ([Co2+] = 1.00μM/[HSO5-] = 5.00·10-2 M) achieved the highest COD removal (60%) and complete decomposition of the oxidant was verified for contact times of 45 min. This process has some advantages comparing to the conventional Fenton method such as the absence of the costly pH adjustment and the Fe(III) hydroxide sludge which characterize this treatment process. The Fenton process showed that the combination of [H2O2] = 2.00M/[Fe2+] = 0.70 M was the best and archived COD removal of 80%. The treatments studied in this research have achieved high COD removal, but the wastewater from the biodiesel purification stage presents very high parametric values of Chemical Oxygen Demand (667,000 mgO2/L), so the final COD concentration reached is still above the emission limit of discharge in surface water, according the Portuguese Law (Decree-Law 236/98). However, both treatments have proved to be feasible techniques for the pre-oxidation of the wastewater under study and can be considered as a suitable pre-treatment for this type of wastewaters. A rough economic analysis of both processes was, also, made.
Źródło:
Archives of Environmental Protection; 2019, 45, 2; 66-72
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the central composite design to optimization of petroleum hydrocarbons removal from oilfield water using advanced oxidation process
Autorzy:
Farzadkia, M.
Ghorbanian, M.
Biglari, H.
Gholami, M.
Mehrizi, E. A.
Powiązania:
https://bibliotekanauki.pl/articles/204881.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
advanced oxidation processes
optimizing
total oil hydrocarbons
central composite design
Opis:
In the last few years, RSM method has been used widely to analyze, optimize and evaluate the interaction of independent factors for chemical, biochemical, and environmental processes. This study examined and evaluated the applicability of this method to manage Oilfield Produced Water to prevent marine environment due to the presence of hard degradable compounds by ozonation process. In this study simulated oil-water sample and a homogenizer reactor was used. The main reactor used in this study was impeinger equipped with sintered glass filter through which the treated oil-water was entered to reactor in the form of discontinuous flow. After ozonation and at the end of the reaction time (60 min), the concentration of oil hydrocarbons was determined by a gas chromatography device equipped with a flame ionization detector. The performance of the central composite design (CCD) approach was evaluated by the F-Value, P-Value, R2, lack of fit test and Adequate Precision parameters to determine the influence of effective factors, including ozonation time, pH, ozone dose, and TPH concentration on the TPH removal efficiency. The mean TPH efficiency obtained from the design of the 30-step experiment resulting from surface-response method was 49.903%, with a standard deviation of 12.47. This study showed the high power of model adopted from the central composite design to predict the hydrocarbons removal from oilfield water using advanced oxidation process, and it was proved that this model can be used alone to determine the design space nature.
Źródło:
Archives of Environmental Protection; 2018, 44, 4; 22-30
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batch and Continuous Photo-Fenton Oxidation of Reactive-Red Dye from Wastewater
Autorzy:
Hassan, Ali A.
AlJaberi, Forat Yasir
Al-Khateeb, Raid T.
Powiązania:
https://bibliotekanauki.pl/articles/2025725.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
dye
wastewater treatment
advanced oxidation process
central composite design
optimization
Opis:
This paper aims to investigate the ability of photo-Fenton technology to remove Reactive Red dye (RR-dye) from wastewater using batch and continuous operating modes. The batch mode of photo-Fenton removal of organic content was conducted under the influence of solution pH (3–10), hydrogen peroxide (25–100 ppm), irradiation time (20–90 min), ferrous sulphate (5–20 ppm), and temperature (25–60 °C). For comparison, the continuous treatment was conducted under the influence of the flow rate of the contaminated solution (10, 20, 30, 40, and 50 mL/min). The results revealed that the treatability of the batch mode was more effective compared to the continuous mode. In the batch process, the organic contaminant was completely removed compared to that of 82% obtained when the continuous system was performed. The optimization process showed that the optimal values of the operating variables in the case of the batch removal of RR-dye were 3, 78 ppm, 90 min, 20 ppm, and 60 °C for pH, hydrogen peroxide, irradiation time, ferrous sulphate, and temperature, respectively. Moreover, the reversion F-value was 21.69, the probability P value was less than 0.001, and the correlation coefficient was (R2 = 0.9455), which illustrative the significance of the model obtained for the batch process.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 14-23
2299-8993
Pojawia się w:
Journal of Ecological Engineering
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.
Powiązania:
https://bibliotekanauki.pl/articles/207333.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper(III)
Fenton process
sewage treatment plant
toxicity
pharmaceuticals
reakcja Fentona
miedź(III)
farmaceutyki
toksyczność
oczyszczalnia ścieków
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.
Źródło:
Environment Protection Engineering; 2017, 43, 1; 31-47
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Non-Thermal Plasma-Based Advanced Oxidation Process for Removal of Organic Contaminants In Azo Dyes Solution
Autorzy:
Kasih, T. P.
Powiązania:
https://bibliotekanauki.pl/articles/123355.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
plasma-AOPs
organic waste treatment
submerged plasma channels
dye decoloration
Opis:
The present study deals with the development of non-thermal plasma-based AOPs for removal of organic contaminants in wastewater treatment. The plasma itself is generated based on point-to-point geometry under organic solution and can generate hydroxyl radicals, ozone, peroxide and other radicals as the basic species to destruct organic contaminants. Electrical diagnostic in a form of voltage and current waveform was investigated through the variation of time during the formation of plasma channeling. The evolutions of plasma channeling with its physical phenomena were also discussed. The relationship between the electrodes distance towards applied voltage to sustain the plasma were also studied. It was found that the mineralization occurred during plasma treatment to transform the harmful functional group in organic dye solution into harmless species. Simultaneously, the decoloration process by using this submerged plasma treatment system is able to change the orange color of methyl orange solution into clearly transparent water in 30 minutes. The present findings may provide the plasma-based advanced oxidation process as a promising chemical-free and cost competitive AOP process application on specially the waste water treatment in textile industry.
Źródło:
Journal of Ecological Engineering; 2017, 18, 2; 1-6
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Treatment of Petroleum Refinery Wastewater by Graphite–Graphite Electro Fenton System Using Batch Recirculation Electrochemical Reactor
Autorzy:
Kassob, Ali Nadhum
Abbar, Ali Hussein
Powiązania:
https://bibliotekanauki.pl/articles/2202176.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
advanced oxidation process
COD removal
electro-Fenton
porous graphite
response surface methodology
Opis:
Water pollution and the lack of access to clean water are general global problems that result from the expansion of industrial and agricultural activities. Petroleum refinery wastewaters are considered as a major challenge to the environment and their treatment is mandatory. The present work investigated the removal of chemical oxygen demand (COD) from petroleum refinery effluents generated from the Al-Dewaniya petroleum refinery plant located in Iraq by utilizing a novel graphite–graphite electro-Fenton (EF) system. The electrochemical reactor was a tubular type with a cylindrical cathode made from porous graphite and concentric porous graphite rode acts as an anode. By adopting the response surface methodology (RSM), the impacts of different operating variables on the COD removal were investigated. The optimal conditions were a current density of 25 mA/cm2, FeSO4 concentration of 1.4 mM, and electrolysis time of 90 minutes, which resulted in the COD removal efficiency (RE%) of 99% at a specific energy consumption (SEC) of 10.34 kWh/kg COD. The results indicated that both current density and concentration of FeSO4 have a major impact on the elimination of COD, while time has a minor effect. The adequacy of the model equation was demonstrated by its high R2 value (0.987). The present work demonstrated that the graphite–graphite EF system could be considered as an effective approach for removing of COD from petroleum refinery wastewaters.
Źródło:
Journal of Ecological Engineering; 2022, 23, 10; 291--303
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Nitramine Explosives in Aqueous Solution by UV-Mediated Advanced Oxidation Process in Near-Neutral Conditions
Autorzy:
Khue, Do Ngoc
Bach, Vu Quang
Binh, Nguyen Thanh
Minh, Do Binh
Nam, Pham Thi
Loi, Vu Duc
Nguyen, Hoa Thanh
Powiązania:
https://bibliotekanauki.pl/articles/1838360.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hexogen
octogen
tetryl
UV
photo-Fenton
electrooxidation
near neutral
Opis:
Explosive compounds are hazardous to the environment, posing a serious risk to human and animal health and the ecosystem. The primary goal of research was to compare the efficiency of UV/H2O2, photo-Fenton, electro (EO)/ UV/H2O2 processes at near-neutral pH (pH=6) on the degradation of nitramine explosives (NAs), such as hexogen (RDX), octogen (HMX), and tetryl (TET), in an aqueous solution. The effect of operational conditions, likely pH of the solution, initial H2O2 concentration, initial Fe2+ concentration, and solution temperature, was observed. The removal kinetics fit with first-order kinetics and were in the order: photo-Fenton >EO/UV/ H2O2 > UV/ H2O2. The results showed higher rate constant values for TET, RDX and HMX removal by UV/ H2O2 (k = 0.07778, 0.03791 and 0.03786 min-1), EO/UV/ H2O2 (k = 0.16599, 0.1475 and 0.08674 min-1) and photo-Fenton (k = 0.18018, 0.1501 and 0.09336 min-1) processes. Furthermore, TET, RDX and HMX were mineralized at 59.7%, 45.1%, and 25.1 %, respectively, under optimum conditions after 60 min of the photo-Fenton process. From the economic perspective, photo-Fenton only requires 2.132–4.113 kWh m-3 to completely reduce NAs. Finally, acute toxicity towards Vibrio fischeri was defeated after usage of near-neutral photo-Fenton. Thus, photo-Fenton at circum-neutral is promising for low-cost, eco-friendly and efficient processes for treating nitramine explosives in aqueous solutions.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 232-243
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Nitramine Explosives in Aqueous Solution by UV-Mediated Advanced Oxidation Process in Near-Neutral Conditions
Autorzy:
Khue, Do Ngoc
Bach, Vu Quang
Binh, Nguyen Thanh
Minh, Do Binh
Nam, Pham Thi
Loi, Vu Duc
Nguyen, Hoa Thanh
Powiązania:
https://bibliotekanauki.pl/articles/1838333.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hexogen
octogen
tetryl
UV
photo-Fenton
electrooxidation
near neutral
Opis:
Explosive compounds are hazardous to the environment, posing a serious risk to human and animal health and the ecosystem. The primary goal of research was to compare the efficiency of UV/H2O2, photo-Fenton, electro (EO)/ UV/H2O2 processes at near-neutral pH (pH=6) on the degradation of nitramine explosives (NAs), such as hexogen (RDX), octogen (HMX), and tetryl (TET), in an aqueous solution. The effect of operational conditions, likely pH of the solution, initial H2O2 concentration, initial Fe2+ concentration, and solution temperature, was observed. The removal kinetics fit with first-order kinetics and were in the order: photo-Fenton >EO/UV/ H2O2 > UV/ H2O2. The results showed higher rate constant values for TET, RDX and HMX removal by UV/ H2O2 (k = 0.07778, 0.03791 and 0.03786 min-1), EO/UV/ H2O2 (k = 0.16599, 0.1475 and 0.08674 min-1) and photo-Fenton (k = 0.18018, 0.1501 and 0.09336 min-1) processes. Furthermore, TET, RDX and HMX were mineralized at 59.7%, 45.1%, and 25.1 %, respectively, under optimum conditions after 60 min of the photo-Fenton process. From the economic perspective, photo-Fenton only requires 2.132–4.113 kWh m-3 to completely reduce NAs. Finally, acute toxicity towards Vibrio fischeri was defeated after usage of near-neutral photo-Fenton. Thus, photo-Fenton at circum-neutral is promising for low-cost, eco-friendly and efficient processes for treating nitramine explosives in aqueous solutions.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 232-243
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja warunków procesu pogłębionego utleniania odcieków składowiskowych odczynnikiem Fentona
Optimization of advanced oxidation process of the municipal landfill leachate by Fenton’s reagent
Autorzy:
Koc-Jurczyk, J.
Jurczyk, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/357266.pdf
Data publikacji:
2015
Wydawca:
Politechnika Śląska
Tematy:
odcieki składowiskowe
odczynnik Fentona
temperatura
landfill leachate
Fenton's reagent
temperature
Opis:
W badaniach analizowano wpływ temperatury i proporcji reagentów chemicznych (Fe2+ i H2O2) na efektywność usuwania ChZT i zmiany proporcji BZT5/ChZT w odciekach składowiskowych pochodzących z 21-letniego składowiska odpadów komunalnych (Polska, województwo podkarpackie). Przetestowano cztery temperatury prowadzenia procesu: 30, 40, 50 i 60˚C. Badania prowadzono przy stałej dawce H2O2 – 1 g/dm3 i zmieniającej się proporcji Fe2+:H2O2: 1:3, 1:2 i 1:1. Stwierdzono, że najniższa efektywność oczyszczania odcieków zachodziła w temperaturze 40˚C niezależnie od zastosowanej proporcji reagentów chemicznych. Najbardziej efektywną okazała się proporcja Fe2+:H2O2 1:1 i temperatura 30˚C.
In this paper the influence of temperature and proportions of chemical reactants (Fe2+ i H2O2) on efficiency of COD removal and changes of BOD/COD ratios in leachate form 21 years old municipal landfill have been analyzed (Poland, Podkarpackie province). Four temperature variants: 30, 40, 50 i 60˚C. The process was conducted in constant H2O2 dose of 1 g/dm3, and variable proportions of Fe2+/H2O2: 1:3, 1:2 i 1:1. It was stated that in temperature of 40˚C treatment was most ineffective regardless of reactant doses. The most efficient conditions for examined wastewater was dose 1:1 at the temperature of 30˚C.
Źródło:
Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2015, 17, 3; 1-8
1733-4381
Pojawia się w:
Archiwum Gospodarki Odpadami i Ochrony Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zużycie energii w procesie oczyszczania ścieków z wykorzystaniem metody pogłębionego utleniania
The energy consumption in the process of waste water treatment with usage of advanced oxidation processes
Autorzy:
Kowalczyk, R.
Bąbała, J.
Powiązania:
https://bibliotekanauki.pl/articles/227935.pdf
Data publikacji:
2010
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
metoda pogłębionego utleniania
zużycie energii
oczyszczanie ścieków
sewage purification
wastewater treatment
oxidation process
Opis:
Badano zużycie energii w procesie oczyszczania ścieków z wykorzystaniem metody pogłębionego utlenienia w podczyszczalni jednego z większych zakładów drobiarskich. Stwierdzono, że w procesie tym zużywa się 2-3 krotnie mniej energii niż w tradycyjnych technologiach oczyszczania w innych porównywalnych zakładach przemysłu spożywczego.
The energy consumption in the process of sewage purification with usage of Advanced Oxidation Processes in treatment plant of waste water ofthe one of bigger poultry-breeding plant was investigated. It was found that in above mentioned process the energy consumption is 2-3 times lower then in traditional technologies of sewage purification in other food industry plants.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2010, 2; 61-63
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical pretreatment of formaldehyde wastewater by selected Advanced Oxidation Processes (AOPs)
Autorzy:
Kowalik, P.
Powiązania:
https://bibliotekanauki.pl/articles/115614.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
advanced oxidation processes
catalytic ozonation
Fenton process
Opis:
Chemical oxidation processes: Fenton process and catalytic ozonation with Mn2+ ions were investigated for effectiveness of formaldehyde (FA) oxidation. The influence of operational variables — O3, H2O2, Mn2+ and Fe2+ concentrations and reaction time were investigated. Researches were carried out on aqueous solution of FA, which concentration was 500 mg/l. Fenton process was investigated at pH 3 and catalytic ozonation at pH 7, 10 and 12. Results revealed that Fenton process was much more effective in FA degradation than catalytic ozonation with Mn2+ as a catalyst. The optimal H2O2/Fe2+ dosage for a Fenton process was 2000/1000 mg/l. COD and FA concentrations were reduced 59,6% and 79,5%. In case of catalytic ozonation with Mn2+ the eff ectiveness was much less and it was the biggest at pH 12 and Mn2+ dosage 25 mg/l where COD and FA concentration were reduced 14% and 38%. Therefore, Fenton process can be promising technology for FA wastewater pretreatment.
Źródło:
Challenges of Modern Technology; 2011, 2, 4; 42-48
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced oxidation processes for food industrial wastewater decontamination
Autorzy:
Krzemińska, D.
Neczaj, E.
Borowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/123725.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
advanced oxidation process
wastewater
food industry
Opis:
High organic matter content is a basic problem in food industry wastewaters. Typically, the amount and composition of the effluent varies considerably. In the article four groups of advanced processes and their combination of food industry wastewater treatment have been reviewed: electrochemical oxidation (EC), Fenton’s process, ozonation of water and photocatalytic processes. All advanced oxidation processes (AOP`s) are characterized by a common chemical feature: the capability of exploiting high reactivity of HO radicals in driving oxidation processes which are suitable for achieving decolonization and odour reduction, and the complete mineralization or increase of bioavailability of recalcitrant organic pollutants.
Źródło:
Journal of Ecological Engineering; 2015, 16, 2; 61-71
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pretreatment of Stabilized Landfill Leachate Using Ozone
Autorzy:
Kwarciak-Kozłowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/124499.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
landfill leachate
ozonation
hydrogen peroxide
ultrasonic field
advanced oxidation process
Opis:
The paper presents the possibility of using the ozonation process in landfill leachate pretreatment. The study was conducted in three stages. In the first stage, the landfill leachate was subjected only to the ozone, with the dose varying from 10 mg/dm3 to 40 mg/dm3. As part of this stage of research, the effect of changes in the pH of wastewater undergoing the process of ozonation on the efficiency of TOC removal was examined. For all the tested pH values (pH = 3.5, pH = 7 pH = 8.5 pH = 10), the TOC removal rate constant (kRowo) during ozonization was determined. In the second stage of the study, the ozonation process was facilitated by UV radiation. Additionally in this stage, the rate of generation of OH• radicals was accelerated by the addition of hydrogen peroxide to the reactor. The COD: H2O2 ratio by weight was 1:2.5, 1:5 and 1:10 and 1:20. In the last stage of the study, we attempted to assist the ozonation process using ultrasonic field. The employed vibration amplitude amounted to 25μm and sonication time equalled 300 seconds. It was found that the ozonation process is the most effective at alkaline pH (8.5). The TOC removal efficiency was 37% (346 mg/dm3) after 60 minutes of ozonation. The best results of pollutants oxidation measured as COD and TOC removal were observed when the dose of ozone was 20 mg/dm3. The combination of sonication and ozonation has resulted in a reduction of COD and TOC values by 370 mg/dm3 and 126 mg/3, respectively, in comparison to the ozonation process alone. It was found that the most effective process in landfill leachate treatment is the combination of ozonation with hydrogen peroxide addition (COD:H2O2=1:10). The COD, TOC and BOD values were 65%, 62% and 36% lower, respectively, in comparison to ozonation process conducted alone.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 186-193
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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