Temat: ammonia - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Potential of Neptunia oleracea L. as a Phytoremediation Agent for Petroleum Liquid Waste
Autorzy:: Hardestyariki, Dwi
Fitria, Syarifa
Powiązania:: https://bibliotekanauki.pl/articles/24201771.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sulfides
ammonia
phytoremediation
Neptunia oleracea
Opis:: This present study to determine the potential of Neptunia oleracea as a phytoremediation agent for petroleum liquid waste in terms of various parameters such as physical temperature, and chemical parameters, namely pH, sulfide, and ammonia. Crude oil liquid waste is a hazardous waste if discharged directly into the environment, especially water. In this research, a method of biological treatment of petroleum liquid waste was used by utilizing aquatic plants, namely Neptunia oleracea. Phytoremediation is a way to treat waste that still contains contaminants thus levels can be minimized and even accumulated by various types of plants. This phytoremediation technique uses a simple bioreactor with various concentrations of petroleum liquid waste, namely control (0% waste), 10% waste, 20% waste, and 30% waste. The results of this study can be seen that the Neptunia oleracea plant is able to survive in petroleum liquid waste with a treatment time of approximately 3 weeks. In testing the levels of ammonia and sulfide after treatment showed fluctuating results from week to week. This is a response from Neptunia oleracea which uses these compounds in its metabolic processes. The ability of Neptunia oleracea to reduce sulfide and ammonia levels indicates that this plant can be used as a phytoremediation agent for petroleum liquid waste.
Źródło:: Journal of Ecological Engineering; 2023, 24, 5; 88--94
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dynamics of Nitrogen and Phosphorus Forms Content in Dojlidy Retention Reservoir
Autorzy:: Oszczapińska, K.
Skoczko, I.
Szczykowska, J.
Powiązania:: https://bibliotekanauki.pl/articles/123705.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water pollution
nitrate nitrogen
ammonia nitrogen
phosphates
Opis:: The Dojlidy Ponds, which include Dojlidy water dam, are located within Bialystok city limits in Podlasie area, Poland. The reservoir with a water surface of 34 ha and average depth of 1.75 m was constructed in 1962 as a result of Biala River damming. The researches were conducted in July, October and December 2014 as well as in March 2015. Each time five test samples were collected from spots located along the reservoir. Water samples were tested for the presence of ammonia nitrogen, nitrite nitrogen, organic nitrogen, phosphates and organic phosphorus. The values of nutrient indicators exhibited high variability during the study period. The highest concentration of nitrite and nitrate nitrogen were observed in July, while the lowest in October – nitrite nitrogen, and in December – nitrate nitrogen. Different situation was observed after the analysis of phosphorus forms – the highest concentrations of organic phosphorus and phosphates were observed in December and the lowest in July. Relatively high concentrations of nitrogen and phosphorus forms identified in water samples were most likely caused by tributaries, due to the pollution from the reservoir catchment. Technical parameters of the object and location of the reservoir have undoubtedly an impact on the tested parameters contents.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 147-153
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Indonesias Natural Zeolite as an Adsorbent for Toxic Gases in Shrimp Ponds
Autorzy:: Anggoro, Didi Dwi
Sumantri, Indro
Buchori, Luqman
Powiązania:: https://bibliotekanauki.pl/articles/1838361.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: shrimp pond water
adsorption
zeolite
ammonia
hydrogen sulphide
Opis:: The objective of this research was to produce safe water for shrimp by using zeolite as adsorbent to absorb unwanted substances (NH3 and H2S). In particular, this study also aimed to design the shrimp pond water treatment equipment, effect of flow rate on zeolite ability to absorb toxic gases (NH3 and H2S), and rate of absorption (K) and reaction (k). The adsorbent is zeolite which has adsorption properties, high surface area and pores suitable for water (3Å). Then, the concentration of ammonia, hydrogen sulfide was analyzed using Ammonia Test Kit and Hydrogen Sulphide of Hach Hydrogen Sulfide Test Kit. The materials used in this study were zeolite of Malang (East Java, Indonesia) and shrimp pond water. The best result of NH3 and H2S adsorption obtained at a flow rate of 3 L•min-1. The best adsorption constant value (K) achieved by a flow rate of 3 L•min-1. On the basis of the best value of R2, NH3 and H2S adsorption, it can be classified in the first-order kinetic model with R2 of 0.9763 and a k value of 0.0007 hours-1 with a flow rate of 6 L•min-1. From the data above, it can be calculated that the adsorbent needed in the adsorption of NH3 and H2S in a scale shrimp pond requires 18 kg of Malang zeolite with a column height of 3.62 m of adsorbent, a diameter of 2.07 m, and a column volume of 12.21 m3.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 202-208
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Adaptation of the Activated Sludge to the Digestate Liquors During the Nitrification and Denitrification Processes
Autorzy:: Majtacz, J.
Kowal, P.
Lu, X.
Al-Hazmi, H.
Mąkinia, J.
Powiązania:: https://bibliotekanauki.pl/articles/123185.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: digestate liquors
activated sludge
free ammonia
adaptation
inhibition
Opis:: The activated sludge process of the digestate liquors after chemical separation was conducted using a 10 L lab-scale sequencing batch reactor (SBR) and a 0.50 m³ pilot-scale SBR independently (with pH control). Due to the relatively high concentration of free ammonia (FA), clear inhibitory effects of the digestate liquors on the nitrifying bacteria were observed. The adaptation of the activated sludge to the toxicity was evaluated with the trends of ammonia uptake rate (AUR) and nitrate utilization rate (NUR). The lab-scale AUR values decreased from 5.3 to 2.6 g N/(kg VSS·h) over time after the addition of digestate liquors (5–10% of the reactor working volume), indicating an apparent FA inhibition on the nitrification process in the FA concentration range of 0.3–0.5 mg N/L. The pilot-scale AUR values increased from 1.8 to 3.6 g N/ (kg VSS·h) in the first two weeks and then decreased to 2.4 g N/(kg VSS·h), showing a lag of the inhibition on the nitrifying bacteria at the FA concentration ≈ 0.15 mg N/L. The lab-scale NURs increased from 2.6 to 10.4 g N/(kg VSS·h) over time, and the pilot-scale NURs increased from 1.0 to 4.0 g N/(kg VSS·h) in a similar pattern. The clear dependence of both the lab- and pilot-scale NURs on time indicated the adaptation of the heterotrophic biomass to the digestate liquors. Ethanol – used instead of fusel oil – was found to be a more efficient external carbon source for better adaptation of the activated sludge under unfavorable conditions.
Źródło:: Journal of Ecological Engineering; 2017, 18, 5; 104-109
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Determination of the Air Purification Efficiency when Using a Biofilter
Autorzy:: Krivolapov, Ivan
Astapov, Andrej
Akishin, Dmitrij
Korotkov, Artemij
Shcherbakov, Sergej
Powiązania:: https://bibliotekanauki.pl/articles/123306.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biofiltration
ammonia
hydrogen sulfide
purification efficiency
filtering material
Opis:: The work presents the results of experimental studies on the air purification efficiency after accelerated composting of a mixture of cattle manure and straw in a chamber-type biofermenter. The operation of an experimental plant that simulates this process was described. A process optimization criterion was established, its values were determined for each of the pollutants – ammonia and hydrogen sulfide. The maximum purification efficiency for ammonia was 92%, achieved at 47% moisture content of the filtering material and 58% compost weight parts at 30 °C. For hydrogen sulfide, the maximum purification efficiency was 95%, achieved at 50% moisture content of the filtering material and 52% compost weight part at 28 °C.
Źródło:: Journal of Ecological Engineering; 2019, 20, 11; 232-239
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Indonesias Natural Zeolite as an Adsorbent for Toxic Gases in Shrimp Ponds
Autorzy:: Anggoro, Didi Dwi
Sumantri, Indro
Buchori, Luqman
Powiązania:: https://bibliotekanauki.pl/articles/1838278.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: shrimp pond water
adsorption
zeolite
ammonia
hydrogen sulphide
Opis:: The objective of this research was to produce safe water for shrimp by using zeolite as adsorbent to absorb unwanted substances (NH3 and H2S). In particular, this study also aimed to design the shrimp pond water treatment equipment, effect of flow rate on zeolite ability to absorb toxic gases (NH3 and H2S), and rate of absorption (K) and reaction (k). The adsorbent is zeolite which has adsorption properties, high surface area and pores suitable for water (3Å). Then, the concentration of ammonia, hydrogen sulfide was analyzed using Ammonia Test Kit and Hydrogen Sulphide of Hach Hydrogen Sulfide Test Kit. The materials used in this study were zeolite of Malang (East Java, Indonesia) and shrimp pond water. The best result of NH3 and H2S adsorption obtained at a flow rate of 3 L•min-1. The best adsorption constant value (K) achieved by a flow rate of 3 L•min-1. On the basis of the best value of R2, NH3 and H2S adsorption, it can be classified in the first-order kinetic model with R2 of 0.9763 and a k value of 0.0007 hours-1 with a flow rate of 6 L•min-1. From the data above, it can be calculated that the adsorbent needed in the adsorption of NH3 and H2S in a scale shrimp pond requires 18 kg of Malang zeolite with a column height of 3.62 m of adsorbent, a diameter of 2.07 m, and a column volume of 12.21 m3.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 202-208
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Estimation of the Efficiency of Ammonia Oxidation in Anolyte of Two-Chamber Electrolyzer
Autorzy:: Gomelya, Mykola
Shabliy, Tetyana
Radovenchyk, Iaroslav
Overchenko, Tetyana
Halysh, Vita
Powiązania:: https://bibliotekanauki.pl/articles/123631.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonia
electrolysis
anolyte
catholyte
anion exchange membrane MA-41
Opis:: In this study, the processes of electrochemical oxidation of ammonia in a two-chamber electrolyzer with anion exchange membrane MA-41 were investigated. An estimation of the efficiency of the process of oxidation of ammonia, depending on the chemical composition of the initial solution of anolyte and catholyte, current density and time of electrolysis was carried out. It was shown that the oxidation of ammonia in the anode chamber passes quickly and is accompanied by a significant decrease in pH due to the formation of nitrogen dioxide and nitrates. At the same time, the current output and the electrical conductivity of the dilute solutions was rather low. The effect of chlorides on the process of electrolysis was investigated. It was shown that the presence of chlorides in the anolyte catalyzes the processes of oxidation of ammonia. An increase in the concentration of chlorides in the anolyte increases output and reduces electricity consumption. The presence of chlorides in the catholyte does not accelerate oxidation. The presence of sulfates, both in the anolyte and in the catholyte, slows down the process of oxidation of ammonia as a result of the oxidation of sulfates to persulfates, which are quite passive to ammonium ions. At the same time, electricity consumption increases.
Źródło:: Journal of Ecological Engineering; 2019, 20, 5; 121-129
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The Impact of Pond on Water Quality in the Čermná Stream
Autorzy:: Hubačíková, V.
Oppeltová, P.
Powiązania:: https://bibliotekanauki.pl/articles/952354.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonia nitrogen
nitrate nitrogen
nitrite nitrogen
concentration
waste water
Opis:: The aim of this study is to demonstrate the positive impact of ponds on water quality in a small stream Čermná. Four sites were sampled regularly every month for one year. Simultaneously, pH and temperature were measured continuously. The concentration of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen were determined by subsequent analysis of the water samples. The results were classified in compliance with Government Decree (GD) No. 401/2015 Coll., as amended, and Czech standard ČSN 75 7221. High concentrations of ammonia nitrogen that were detected during the whole period are the result of the discharge of all wastewater from the village of Dolní Čermná to flow Čermná. Although the results showed a positive effect pond Čermenský, during the growing season the concentration of ammonia nitrogen at SP No. 2 placed under the pond increased mainly due to fertilizing pond by manure to increase nutrients for the fish population in the pond.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 42-47
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of Different Plant Monocultures on Nitrogen Removal Performance in Wetland Microcosms
Autorzy:: Wang, Rujun
Quan, Ying
Zheng, ShaoKui
Zhang, Xueyu
Powiązania:: https://bibliotekanauki.pl/articles/2173379.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ammonia
constructed wetland
free-water surface
nitrate
optimization mechanism
Opis:: This study investigated the nitrogen removal performance in wetland microcosms individually planted with different plant monocultures, including emergent, free-floating and submerged plants during ammonia removals, or large- and small-leaf free-floating plants during nitrate removal. For ammonia-dominated wastewater, both emergent (common reed) and free-floating (water hyacinth) plants in wetland microcosms achieved higher total nitrogen removals than a submerged plant (eelgrass) that significantly improved the microbial nitrifying performance. For nitrate-dominated wastewater, efficient nitrate removals in wetland microcosms planted with free-floating plant were achieved by both a full cover of water surface and the concentration of organic oxygen-consuming substances, which resulted in low dissolved oxygen levels and boosted microbial denitrification in wetland microcosms. FWS-CW developers and managers should thus pay close attention to the selection of wetland plant types and optimize their design to achieve optimum nitrogen removal performance.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 241--249
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effects of Yucca Shidigera Extract on the Reduction of Ammonia Concentration in Lake Koumoundourou
Autorzy:: Yu, X.
Dimitriou, E.
Konstantinos, S.
Markogianni, V.
Politi, D.
Powiązania:: https://bibliotekanauki.pl/articles/123486.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Yucca shidigera extract
ammonia reduction
lake restoration
water quality
eutrophication
Opis:: Nitrogen related water pollution in aquatic systems is one of the most common problems encountered worldwide nowadays. Different restoration practices have been tested to eliminate the impacts from eutrophication but no widely applicable methodology has been found until now. Extract of Yucca shidigera has been proved effective in reducing ammonia in livestock industry and aquaculture but have not been yet tested in freshwater ecosystems. In this study, the effects of yucca extract on the reduction of ammonia in Lake Koumoundourou have been investigated. Yucca extract was added at various concentrations to experimental tanks containing lake water and sediment. The results show that yucca extract significantly reduced the concentration of ammonia while other water quality parameters were relatively stable during the experiment, except from dissolved oxygen. The study indicates that yucca extract as a restoration method can be promising but larger scale experiments should be conducted to validate this outcome.
Źródło:: Journal of Ecological Engineering; 2015, 16, 4; 1-7
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Efficiency of Pre-Treatment of Leachate from Municipal Waste Dumps by Gaseous Desorption (Stripping) of Ammonia
Autorzy:: Koc-Jurczyk, J.
Jurczyk, Ł.
Olszówka, K.
Powiązania:: https://bibliotekanauki.pl/articles/123391.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: landfill leachate
gaseous desorption of ammonia
retardation of adverse environmental effect
Opis:: The paper studies the efficiency of pre-treatment of landfill leachate by gaseous desorption of ammonia. The research was done on a municipal non-hazardous waste dump in Krosno (Sub-Carpathian Province, Poland). The pretreatment provided a favorable BOD₅/COD ratio in leachate. Also concentrations of 16 PAHs and heavy metals did not exceed the legal limits. However, gaseous desorption of ammonia was insufficiently efficient in recovering ammonia nitrogen from leachate.
Źródło:: Journal of Ecological Engineering; 2017, 18, 3; 125-132
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Modeling of Organic Substances and Ammonia Nitrogen Removal in Vertical Flow Constructed Wetlands
Autorzy:: Malinowski, Paweł
Dąbrowski, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/124762.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: treatment modeling
vertical flow constructed wetlands
reject water
organic substances
ammonia nitrogen
Opis:: The aim of the research was to determine the possibility of using and adapting regression models for a description of constructed wetland systems treating reject water from aerobic sewage sludge stabilization. The P-k-C* model was investigated along with related models. The research was carried out using reject water from aerobic sewage sludge stabilization in dairy wastewater treatment plant (WWTP) belonging to Mlekovita in Wysokie Mazowieckie. The main components of the research installation were two vertical flow constructed wetland beds with passive aeration operating at 0.1 m/d hydraulic load. The following parameters were used for modeling: BOD₅, COD, N-NH₄⁺ and temperature. Air temperature was also monitored.
Źródło:: Journal of Ecological Engineering; 2020, 21, 1; 231-237
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Zawartość związków azotowych i fosforanów w wodach powierzchniowych przeznaczonych do zaopatrzenia ludności w wodę do spożycia
The content of nitrogen compounds and phosphates in surface water intended for supply in drinking water
Autorzy:: Kaniuczak, J.
Augustyn, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/401764.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: azot organiczny
amoniak, azotany (V)
fosforany (V)
organic nitrogen
ammonia
nitrates
nitrites
phosphate
Opis:: Związki azotu i fosforu są powszechnie występującymi związkami w wodach powierzchniowych, których ilość waha się w zależności od różnych czynników. Jak wynika z analiz przeprowadzonych w ciągu minionych kilkunastu lat (1997-2010), zawartość azotanów (V), azotanów (III) i fosforanów (V) w wodach powierzchniowych Wisłoki, na wysokości miasta Mielca, wykazywała tendencję malejącą, a azotu organicznego i amoniaku rosnącą. Występowała także zależność pomiędzy zawartością związków azotowych i fosforanów (V), a porą roku i pH wody. Na ogół ich zawartość wzrastała wraz ze zwiększaniem się pH wody, a największe zawartości stwierdzano latem lub jesienią, najniższe zaś wiosną.
Nitrogen and phosphorus compounds are common in surface waters, whose quantity varies depending on various factors. As it comes from studies conducted over the past several years (1997-2010), content of nitrates, nitrites and phosphates in the surface waters of Wisloka, at the height of the town Mielec, showed a downward trend and organic nitrogen and ammonia nitrogen the upward trend. There was a relationship between the content of nitrogen compounds and phosphates and the season and pH of the water. In general, their content increased with increasing of the pH in the water and the greatest contents was found in summer or autumn and the lowest in spring.
Źródło:: Inżynieria Ekologiczna; 2011, 27; 46-59
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: The Biomethanization Gas Purification of Using Chlorophyll-Synthesizing Microalgae
Autorzy:: Dyachok, Vasil
Venher, Liubov
Huhlych, Sergij
Powiązania:: https://bibliotekanauki.pl/articles/2173378.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: microalgae
Chlorella vulgaris
biogas
carbon dioxide
hydrogen sulfide
ammonia
nitrogen oxide
sulfur dioxide
Opis:: The paper shows the possibility of using chlorophyll-synthesizing microalgae of Chlorella vulgaris to purify biogas from carbon dioxide (CO2), hydrogen sulfide (H2S) and ammonia (NH3). Experimental dependences of the dynamics of CO2 uptake by microalgae under the action of H2S inhibitor and NH3 activator were presented. A mathematical description of the growth of biomass of microalgae Chlorella vulgaris, depending on the concentration of hydrogen sulfide and ammonia, was obtained. The optimal values of hydrogen sulfide and ammonia concentration for the efficient process of carbon dioxide uptake by chlorophyll-synthesizing microalgae Chlorella vulgaris from biomethanization gas were established.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 259--264
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Nowe trendy w usuwaniu azotu amonowego ze ścieków: nitrytacja – anammox w niskiej temperaturze
new trends in ammonia nitrogen removal from wastewater: nitritation – anammox at low temperature
Autorzy:: Tomaszewski, M.
Cema, G.
Ziembińska-Buczyńska, A.
Powiązania:: https://bibliotekanauki.pl/articles/400316.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: nitrytacja–anammox
usuwanie azotu amonowego
oczyszczanie ścieków
nitritation–anammox
ammonia nitrogen removal
wastewater treatment
Opis:: Proces częściowej nitryfikacji (nitrytacji) – anammox (beztlenowego utleniania azotu amonowego) znajduje coraz szersze zastosowanie w oczyszczaniu ścieków o wysokim ładunku azotu amonowego i wysokiej temperaturze (25–40°C). Podyktowane jest to optymalną temperaturą rozwoju bakterii anammox, która mieści się w zakresie od 30 do 40°C. Ze względu na korzyści płynące z wykorzystania procesu anammox do oczyszczania ścieków komunalnych, których temperatura znacznie odbiega od optymalnej dla procesu, coraz więcej uwagi poświęca się badaniom nad możliwościami efektywnego prowadzenia procesu nitrytacji – anammox w niższej temperaturze (10–20°C). W porównaniu do tradycyjnego systemu nitryfikacji – denitryfikacji, proces nitrytacji – anammox cechuje się niższym zapotrzebowaniem na tlen, niższym przyrostem osadu nadmiernego oraz brakiem zapotrzebowania na źródło węgla organicznego, co przekłada się na znaczne obniżenie kosztów eksploatacyjnych. W prezentowanej pracy dokonano przeglądu najnowszych badań i osiągnięć dotyczących zastosowania procesu nitrytacji – anammox w niskich temperaturach. Wykazały one, że możliwe jest skuteczne usuwanie azotu amonowego ze ścieków komunalnych w temperaturze 15°C w skali pilotażowej, a nawet 12°C w skali laboratoryjnej. Najlepsze rezultaty osiągane są dzięki zastosowaniu reaktorów sekwencyjnych i/lub ze złożem ruchomym, w których biomasa występuje w formie granul i/lub biofilmu, a także kombinacje tych technologii. Badania oparte na biologii molekularnej sugerują natomiast, że największe zdolności adaptacyjne do niskiej temperatury wykazują bakterie anammox z rodzaju Candidatus Brocadia. W dalszym ciągu wyzwaniem pozostaje jednak utrzymanie stabilnego procesu nitrytacji – anammox w temperaturze 10°C oraz sposób i czas adaptacji biomasy.
Partial nitrification (nitritation) – anammox (anaerobic ammonia oxidation) process is increasingly used to treat wastewater, characterized by a high nitrogen content and high temperature (25–40°C). It is connected with the optimal temperature of anammox bacteria, which is at the range between 30 and 40°C. Mainstream application of anammox for the municipal wastewater, characterized by lower temperature seems to be one of the most challenging, but profitable process. Thenceforth, the research performed in the field of the nitritation – anammox at low temperature (10–20°C) become more and more intense. Compared with the conventional nitrification – denitrification system, nitritation – anammox reduces oxygen demand, eliminates the need for organic carbon source and produces less excess sludge. As a result, it allows to a significant cost reduction. This paper reviews the most important and recent information in the field of nitritation – anammox process at low temperature. Effective nitrogen removal from the municipal wastewater was demonstrated at 15°C in a pilot scale and at 12°C in a laboratory scale reactor. The best performance is achieved in sequencing batch reactors and moving bed reactors with biofilm or granular biomass, as well as combinations of these technologies. Molecular biology studies shows that anammox bacteria of the genus Candidatus Brocadia may have the biggest predispositions to adapt to low temperature. However, temperature about 10°C, time and method of biomass adaptation are still the main challenges for stable and common nitritation – anammox process.
Źródło:: Inżynieria Ekologiczna; 2017, 18, 2; 175-179
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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