Temat: anaerobic digestion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Anaerobic digestion and composting as methods of bio-waste management
Porównanie procesów beztlenowego i tlenowego zagospodarowania bioodpadów
Autorzy:: Czekała, Wojciech
Nowak, Mateusz
Bojarski, Wiktor
Powiązania:: https://bibliotekanauki.pl/articles/8778980.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: biomass
waste
anaerobic digestion
composting
circular economy
waste management
biomasa
fermentacja beztlenowa
kompostowanie
gospodarka cyrkularna
zarządzanie odpadami
Opis:: The management of biodegradable waste from various sectors of economy is an essential element in terms of environmental protection. The paper discusses issues related to the possibility of bio-waste treatment using anaerobic digestion technologies and composting processes, highlighting the conditions for the processes and their advantages and disadvantages. The challenges of overproduction of bio-waste faced by highly developed countries around the world are also presented. Research showed that the anaerobic digestion of this waste combines both biofuel production and a circular economy. The popularity of this method is linked, among others to a low cost of raw materials and wide range of possible uses for biogas (i.e. electricity, heat, or biomethane). In addition, an alternative bio-waste management option, compost production, was discussed. The study aimed to compare anaerobic and aerobic bio-waste management processes.
Zagospodarowanie odpadów biodegradowalnych pochodzących z różnych gałęzi gospodarki jest niezbędnym elementem w aspekcie ochrony środowiska. W artykule omówione zostały zagadnienia związane z możliwością przetwarzania bioodpadów wykorzystując technologie fermentacji metanowej i procesu kompostowania, z podkreśleniem warunków prowadzenia procesów oraz ich wad i zalet. Przedstawione zostały także wyzwania związane z nadmierną produkcją bioodpadów, przed którymi stoją państwa wysokorozwinięte na całym świecie. Prowadzone badania pokazują, że fermentacja beztlenowa omawianych odpadów łączy zarówno produkcję biopaliw oraz gospodarkę obiegu zamkniętego. Popularność omawianej metody jest związana m.in. z niskim kosztem surowców oraz szeroką możliwością wykorzystania produktu jakim jest biogaz (tj. elektryczność, ciepło lub biometan). Ponadto omówiona została tematyka związana z alternatywną możliwością zagospodarowania bioodpadów jaką jest produkcja kompostu. Celem pracy było porównanie procesów beztlenowego i tlenowego zagospodarowania bioodpadów.
Źródło:: Agricultural Engineering; 2023, 27, 1; 173--186
2083-1587
Pojawia się w:: Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of Mesophilic Bacteria Inoculation with Chicken Manure for Biogas Production Enhancement in Anaerobic Digestion (AD) Process
Autorzy:: Alkarimiah, Rosnani
Powiązania:: https://bibliotekanauki.pl/articles/27314870.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: anaerobic digestion
POME
chicken manure
methane production
bacteria
fermentacja beztlenowa
ścieki z olejarni
olej palmowy
obornik kurzy
produkcja metanu
bakterie
Opis:: The objective of this study is to investigate biogas production by anaerobic digestion using mesophilic bacteria mixed with Palm Oil Mill Effluent (POME). This project aims to determine the volume of biogas generation and volatile fatty acid (VFA) production from chicken manure via the anaerobic digestion process. Anaerobic digestion (AD) of chicken manure (CM) often faces obstacles, including high total ammonia nitrogen (TAN) concentration, inorganic soil particles, and wood chips. The digestion process was carried under batch mode conditions in Scott bottles of 1.0 L active volume. The bottles were immersed in a water bath to control their temperature at 37℃. The characteristics of total solid, volatile solid of mass fraction, pH, and temperature on the amount of biogas produced were studied. The investigation showed that biogas production can be enhanced by inoculation of another material. The optimum biogas composition in the AD system was recorded by Inoculum I, which was achieved on Day 2 at 560 mL/L. The highest cumulative methane yield was observed in the leachate with Inoculum (I), which was 8976 mL/gVS, while the CML produced 4 mL/g VS. The anaerobic digestion (AD) process augmented with inoculum demonstrated heightened efficacy in biogas generation and VFA concentration reduction during the acidogenic phase, surpassing the observed performance in chicken manure leachate.
Źródło:: Civil and Environmental Engineering Reports; 2023, 33, 3; 33--49
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Odzysk surowców z odpadów organicznych poprzez fermentację suchą
Recovery of raw materials from organic waste by dry anaerobic digestion
Autorzy:: Grosser, Anna
Piekutin, Janina
Powiązania:: https://bibliotekanauki.pl/chapters/27320480.pdf
Data publikacji:: 2023-07-19
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: fermentacja sucha
odpady organiczne
biogaz
poferment
dry anaerobic digestion
high solid anaerobic digestion
organic waste
biogas
digestate
Opis:: Usystematyzowano wiedzę na temat suchej fermentacji metanowej, czynników wpływających na jej efektywność, typów reaktorów stosowanych do jej realizacji, łącznie z wybranymi komercyjnymi rozwiązaniami. Dodatkowo omówiono kwestie zagospodarowania produktów fermentacji, jakimi są biogaz oraz osady przefermentowane (poferment).
The chapter systematizes knowledge of dry anaerobic digestion, factors affecting its efficiency, and types of reactors used for its implementation, including selected commercial solutions. Additionally, the issues of management of biogas and digested sludge were discussed.
Źródło:: Inżynieria środowiska i biotechnologia. Wyzwania i nowe technologie; 99-126
9788371939013
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Reduction of Greenhouse Gas Emissions by Replacing Fertilizers with Digestate
Autorzy:: Kowalczyk-Juśko, Alina
Pochwatka, Patrycja
Mazurkiewicz, Jakub
Pulka, Jakub
Kępowicz, Barbara
Janczak, Damian
Dach, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/24201726.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biogas plant
anaerobic digestion
digestate
fertilizing
emission reduction
Opis:: Digestate from a biogas plant can be a valuable organic and mineral fertilizer. Quantitative proportions of cosubstrates used in three agricultural biogas plants in Poland were analyzed. The composition of digestates was examined and large differences in the content of macronutrients were found, especially N and K. On the basis of the factors used to calculate emissions from the production and use of artificial fertilizers, the greenhouse gas (GHG) reduction resulting from replacing mineral fertilizers with digestate was calculated. In terms of 1 Mg of fresh digestate, this reduction may not seem large, as it amounts to 27.9–61.6 kg of CO2 eq, but it should be taken into account that digestate contains little dry matter. The annual amount of digestate used on an area of 1 ha allows avoiding GHG emissions of 25.8–44.5 Mg CO2 eq.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 312--319
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Semi-Continuous Anaerobic Digestion of Water Hyacinth with Different Volatile Solid Levels for Biogas Production – A Mesocosm Experiment
Autorzy:: Thuan, Nguyen Cong
Khanh, Huynh Cong
Powiązania:: https://bibliotekanauki.pl/articles/2202361.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: renewable energy
semi-continuous anaerobic digestion
volatile solid
water hyacinth
Opis:: Water hyacinth (WH) biomass is one of the popular materials in the Vietnamese Mekong Delta, a potential substrate for biogas production. The effectiveness of utilizing WH for producing biogas under anaerobic digestion was demonstrated in the previous studies, but the research was focused on the loading rate of about 1.0% volatile solid (VS). Therefore, in the present study, a semi-continuous anaerobic digestion experiment was conducted with the five levels of VS, including 1.0%VS, 1.5%VS, 2.0%VS, 2.5%VS, and 3.0%VS, to examine how loaded VS can affect biogas production. Each treatment was designed with three replications over 60 days. The measured parameters included pH, temperature (Temp; °C), redox potential (Eh; mV), daily produced biogas volume (L), cumulative biogas volume (L), and methane (CH4) concentration (%) during the 60 days of the experiment. The obtained results showed that pH, tempt, and Eh parameters did not negatively affect biogas production. However, the volume of daily biogas in the treatment of 3.0%VS was higher than in other treatments. In addition, the cumulative biogas volume in the treatment of 3.0%VS was the highest and significantly different between all reactors (p<0.05). Meanwhile, the treatment of 1.0%VS was known with the lowest values. The study explored that the volume of biogas could be increased when the organic loading rate VS is increased.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 230--237
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Technologie uszlachetniania biogazu do biometanu - przegląd literaturowy
Biogas to biomethane upgrading technologies – a literature review
Autorzy:: Grosser, Anna
Jasińska, Anna
Smetana, German
Piekutin, Janina
Powiązania:: https://bibliotekanauki.pl/chapters/27320747.pdf
Data publikacji:: 2023-07-19
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: fermentacja metanowa
biogaz
uszlachetniane biogazu
biometan
anaerobic digestion
biogas
upgrading biogas
biomethane
Opis:: Zwiększenie wartości opałowej biogazu wymaga usunięcia z niego dwutlenku węgla oraz zanieczyszczeń śladowych. Taką możliwość dają metody uzdatniania/uszlachetniania biogazu. W niniejszym przeglądzie literaturowym szczegółowo omówiono istotę oczyszczania biogazu z zastosowaniem wybranych technologii, ich wady i zalety, a także aspekty ekonomiczne proponowanych rozwiązań. Wskazano również dalszy kierunek rozwoju technologii oraz omówiono stan ich implementacji w Europie i Polsce.
Increasing the calorific value of biogas requires removing carbon dioxide and trace impurities from it. Biogas upgrading methods provide such an opportunity. This literature review discusses the essence of biogas upgrading methods, their advantages and disadvantages, and the proposed solutions’ economic aspects. The chapter also showed the further direction of technology development and its implementation status in Europe and Poland.
Źródło:: Inżynieria środowiska i biotechnologia. Wyzwania i nowe technologie; 59-98
9788371939013
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The effect of silage additive on the kinetics of biogas production from lignocellulosic perennial crops
Autorzy:: Kupryś-Caruk, Marta
Lisowski, Aleksander
Chomontowski, Chrystian
Powiązania:: https://bibliotekanauki.pl/articles/2203531.pdf
Data publikacji:: 2023
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: anaerobic digestion
biogas production
Gompertz model
lactic acid bacteria
methane yield
silage
Opis:: The aim of the study was to assess the effect of silage additive containing heterofermentative lactic acid bacteria (LAB) strain of Lactobacillus buchneri species on ensiling quality, as well as methane yield and the kinetics of biogas production from ensiled perennial energy grasses: Miscanthus × giganteus (miscanthus), Spartina pectinata (cordgrass), Panicum virgatum (switchgrass) and Andropogon gerardii (big bluestem). The listed plants are not commonly used for biogas production, their susceptibility to ensiling is also little known, hence the need to investigate their suitability for these processes. Effective methods for increasing the biogas yield from biomass are still demand, hence the research on the use of LAB for this purpose. After harvesting the grasses were cut and ensiled in barrels with and without (controls) the usage of commercial silage inoculant containing Lactobacillus buchneri LN40177. After 90 days of ensiling obtained silages were analysed in order to compare their chemical composition: organic acids content, the loss of dry matter, the differences in particular fibres composition. The silages were then subjected to methane fermentation using OxiTop® sensors and exposed to air in order to check their aerobic stability. The silages prepared with LAB additive had higher concentration of acetic acid than the control silages prepared without LAB addition, which contributed to increased aerobic stability but had no effect on the methane yield of miscanthus, switchgrass and big bluestem. Using the microbial inoculant during ensiling had beneficial effect in terms of reducing the duration of biogas production process from obtained silages: lag phase was shortened, daily biogas production rate was increased and 90% of biogas was produced in a shorter period of time compared to the control silages from investigated grasses. The modified Gompertz model well reflected the kinetics of biogas production process.
Źródło:: Journal of Water and Land Development; 2023, 56; 58--66
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State
Autorzy:: Aboulfotoh, Ahmed M.
Marie, Ahmed I.
El-Hefny, Rehab
Powiązania:: https://bibliotekanauki.pl/articles/2105288.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: anaerobic co-digestion
thermal pretreatment
hydrolysis
waste
food waste
sludge
Opis:: In this study, the effect of thermal pre-treatment (TP) on the physical characteristics and co-digestion of a mixture of food waste and sludge was investigated. The food waste (FW) to sewage sludge (SS) ratio used in this research is 1:2 (VS-based) to form a final concentration of 11.20%. The inoculum to substrate ratio was set at 1:1 (volumebased). Undoubtedly, the results show that TP has changed the physical characteristics of the food waste to sewage sludge mixture. The results show that the pretreatment increased the biogas production from 4385 ml for the untreated reactor to 5685 for the reactor R2(140) at 140 °C and the improvement in biogas production reaches 29.65% in the reactor R2(140) and the removal of volatile solids was 58.90%. Therefore, after the biomethane potential test, the temperature of 140 °C was found to be optimal in the production of biogas. The optimal condition is to use a mixture of pre-treated SS at the temperature of 140 °C and untreated FW, so TP is recommended to be used in anaerobic digestion of the mixture of food waste and sewage sludge.
Źródło:: Journal of Ecological Engineering; 2022, 23, 6; 1--13
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Application of response surface methodology to improve methane production from jerusalem artichoke straw
Autorzy:: Meng, Yan
Li, Yi
Chen, Laisheng
Han, Rui
Powiązania:: https://bibliotekanauki.pl/articles/2203117.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Jerusalem artichoke straw
anaerobic digestion
response surface methodology
methane production
topinambur
słonecznik bulwiasty
fermentacja beztlenowa
produkcja metanu
RSM
Opis:: Anaerobic digestion (AD) converts organic matter and biomass waste into biogas, making it an environmentally friendly technology to improve energy resources for a wide range of applications. Jerusalem artichoke straw (JAS) has an enriched content of cellulose and exhibits a high potential for methane production. AD-based production of methane can eff ectively utilize waste JAS. This study investigated the AD performance of JAS to explore the enhancement of methane yields by employing a Box-Behnken experimental design (BBD) of response surface methodology (RSM). The overall goal was to identify the optimal levels of pretreatment factors, including HCl concentration, pretreatment time, and pretreatment temperature, for producing optimal biomethane yields from JAS. The highest value of methane production achieved was 256.33 mL g-1VS by using an optimal concentration of HCl as 0.25 M, a pretreatment time of 10 h, and a pretreatment temperature of 25°C. These results inform the future application of JAS in enhanced methane production.
Źródło:: Archives of Environmental Protection; 2022, 48, 3; 70--79
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Impact of Nanoparticles on Biogas Production from Anaerobic Digestion of Sewage Sludge
Autorzy:: Heikal, Ghada
Shakroum, Mohamed
Vranayova, Zuzana
Abdo, Ahmed
Powiązania:: https://bibliotekanauki.pl/articles/2173380.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biogas
methane
wastewater
sludge
anaerobic digestion
nanomaterial
magnetic nanoparticles
Opis:: Since anaerobic digestion (AD) is the preferred procedure for sludge treatment and disposal, it is constrained by the hydrolysis and acidogenesis stages. Nanomaterials have an impact on the AD process due to their unique properties (large specific surface areas, solubility, adsorption reduction of heavy metals, degradation of organic matter, reduction of hydrogen supplied and catalytic nature) which make them advantageous in many applications due to their effectiveness in improving the AD efficiency. Magnetic Nanoparticles (MNPs) were used in the present study to improve the biogas production. The experiments were divided into two stages to evaluate the effect of adding MNPs to two types of sewage sludge (SS): attached growth process (AG) and activated sludge (AS). The first stage consists of 15 tests divided into three experiments (A, B, and C). Doses of MNPs (20, 50, 100, 200) mg/l were added to all digesters in the same experiment except for one digester (the control). Experiments A, B and C achieved the highest biogas production when 100 mg/l of MNPs was added. They were 1.9, 1.93 and 2.07 times higher than the control for A, B and C respectively. The second stage consists of 12 tests with a pretreatment for some of SS. It was divided into two experiments (D, E), where the chemical pretreatment was applied to experiment D and the thermal pretreatment was applied to experiment E except for the control. For digester D4, which had 100 mg/l of MNPs after a chemical pretreatment at pH = 12, the biogas production increased by 2.2 times higher than the control (D0) and 1.5 times higher than the untreated sludge with the addition of 100 mg/l MNPs (DN). Thermal pretreatment at 100 °C with addition of 100 mg/l MNPs (E4) achieved a biogas yield 2 times higher than the control (E0), and 1.39 times higher than untreated sludge with 100 mg/l MNPs (EN). The previous results indicate that the integration of magnetite can serve as the conductive materials, promoting inherent indirect electron transfer (IET) and direct interspecies electron transfer (DIET) between methanogens and fermentative bacteria which lead to a more energy-efficient route for interspecies electron transfer and methane productivity. This study demonstrated the positive effect of magnetite on organic biodegradation, process stability and methane productivity.
Źródło:: Journal of Ecological Engineering; 2022, 23, 8; 222--240
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Process Performance of Thermophilic Anaerobic Co-Digestion of Municipal Sewage Sludge and Orange Peel
Autorzy:: Szaja, Aleksandra
Golianek, Paweł
Kamiński, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2173271.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: anaerobic digestion
biogas production
batch reactor
limonene
orange waste
Opis:: In the present study, the process performance of anaerobic co-digestion of municipal sewage sludge and orange peel (OP) was evaluated. The experiment was conducted in batch mode under thermophilic conditions (55 °C). It involved adding 1.5 and 3.0 g of OP to reactors R2 and R3, respectively. In R1 (control reactor), the mono-digestion of sewage sludge was conducted. The obtained results indicated that the application of OP led to deterioration of process efficiency. Decreased methane and biogas productions were noticed at both doses of OP. The average values of methane production were 518.9, 416.8 and 458.6 mLCH4·g-1 VS in R1, R2 and R3, respectively. The declining tendency on the biogas and methane rates was also observed. The application of OP resulted in degradation of the stability parameters. The negative effect of OP application was related with the presence of inhibitors such as ammonia nitrogen, volatile fatty acids, limonene and phenol, importantly theirs increased contents were observed in R2 and R3. Moreover, the thermophilic conditions are not recommended for the anaerobic co-digestion of those substrates, because they might accelerate the inhibition phenomenon.
Źródło:: Journal of Ecological Engineering; 2022, 23, 8; 66--76
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Recent Challenges of Biogas Production and its Conversion to Electrical Energy
Autorzy:: Syahri, Siti Noor Khaleeda Mhd
Abu Hasan, Hassimi
Abdullah, Siti Rozaimah Sheikh
Othman, Ahmad Razi
Abdul, Peer Mohamed
Azmy, Raja Farzarul Hanim Raja
Muhamad, Mohd Hafizuddin
Powiązania:: https://bibliotekanauki.pl/articles/2068475.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biogas
methane gas
electrical energy
anaerobic digestion
energy
Opis:: A pressing concern of issues such as climate change has drawn main attention in the world. The burning of fossil fuels by human due to increasing energy demand in various sectors is one of the main factors that influence the climate change. This has resulted in the introduction of many renewable energy sources as alternatives to fossil fuels. Biogas is one type of renewable energy that has numerous advantages. The present review covers the recent challenges of biogas production and its conversion to electrical energy. This includes the substrates used, the operating parameters, and the pre-treatment used, which can be implemented to maximise the biogas yield. The challenges and potential of the generation of electricity from biogas were also discussed in this review. The results obtained in this review emphasise that biogas is a good renewable energy, as it solves multiple problems and at the same brings benefits to human beings in many ways.
Źródło:: Journal of Ecological Engineering; 2022, 23, 3; 251--269
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Water Lettuce (Pistia stratiotes L.) as a Potential Material for Biogas Production
Autorzy:: Cong, Nguyen Van
Thanh, Tran Van
Kha, Le Thi Mong
Hoang, Nguyen Xuan
Powiązania:: https://bibliotekanauki.pl/articles/2105278.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water lettuce
anaerobic digestion
renewable energy
Opis:: This study evaluated the biogas production potential of water lettuce (Pistia stratiotes L.) by batch anaerobic digestion under in-vitro conditions. Twenty-one litre-plastic jars were used to conduct 4 replications over 75 days. The results showed that solution temperature, pH and Eh were suitable for biogas production. More than 50% of the obtained CH4 was formed within 17–42 days after incubation. The maximum daily CH4 production was 0.052 L/gVS, whilst the daily H2S concentration was low, with a maximum value of 28 ppm within 14–21 d after incubation. Moreover, the peak of daily biogas production was seen at day 16 with production of 0.12 L/gVS. The results highlight that water lettuce biomass can be potentially used to produce high quality biogas in anaerobic incubation.
Źródło:: Journal of Ecological Engineering; 2022, 23, 6; 182--188
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Zastosowanie fermentacji psychrofilowej do oczyszczania ścieków komunalnych
The application of psychrophilic digestion for municipal sewage treatment
Autorzy:: Mrowiec, Bożena
Powiązania:: https://bibliotekanauki.pl/articles/2064176.pdf
Data publikacji:: 2022
Wydawca:: Akademia Techniczno-Humanistyczna w Bielsku-Białej
Tematy:: oczyszczanie beztlenowe
fermentacja psychrofilowa
złoże beztlenowe
oczyszczanie ścieków komunalnych
anaerobic treatment
psychrophilic digestion
anaerobic filter
municipal wastewater treatment
Opis:: Used in practice biological wastewater treatment systems under aerobic conditions are characterized by high energy consumption and a significant sewage sludge production. Anaerobic wastewater treatment differs from conventional aerobic treatment. The absence of oxygen leads to controlled conversion of complex organic pollutions, mainly to carbon dioxide and methane. Anaerobic treatment has favourable effects like removal of higher organic loading, low sludge production, high pathogen removal, biogas gas production and low energy consumption. Psychrophilic anaerobic treatment can be an attractive option to conventional anaerobic digestion for municipal sewage (and wastewaters with industrial effluents) that are discharged at moderate to low temperature. Most reactions in the biodegradation of organic matter require more energy to proceed at low temperatures than at a temperature optimum of 37ºC. However, same reactions, such hydrogenotrophic methane production, acetate formation from hydrogen and bicarbonate, require less energy. In this work, an upflow anaerobic filter for municipal sewage treatment was used. The investigations were carried out in laboratory scale. The sewage treatment process was operated in psychrophilic conditions in the temperature 15-19°C. The value of hydraulic retention time in anaerobic bioreactor was 48 h. A real municipal sewage was taken from the treatment plant, operated in a full scale. The COD values of raw sewage were between 380 and 895 mg O2/L. The sewage used was additionally polluted with ammonia nitrogen average 81 mg NH4+/L, phosphate - 27 mg PO43-/L as well as sulphates 69 mg SO42-/L. The investigations comprised of three series of different organic loading rates: series 1 - 0.19 kg COD/(m3·d), series 2 - 0.32 kg COD/(m3·d) and series 3 0.26 kg COD/(m3·d). Depending on values of sewage/organic loading rates 46-72% of COD were removal at psychrophilic conditions. The presence of ammonia nitrogen and sulphates did not have a negative impact on the process of organic matter degradation. Anaerobic treatment was effective in removing biodegradable organic compounds, but mineral compounds (NH4+, PO43-, S2-) remained in high concentrations. Therefore, these compounds require removing by an additional post-treatment step.
Źródło:: Polish Journal of Materials and Environmental Engineering; 2022, 3(23); 44-53
2720-1252
Pojawia się w:: Polish Journal of Materials and Environmental Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Anaerobic Digestion of Wheat Straw Pretreated with Soaking in Water and Alkali Medium
Autorzy:: Zdeb, Magdalena
Powiązania:: https://bibliotekanauki.pl/articles/1955544.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: alkaline pretreatment
wheat straw
anaerobic digestion
biogas production
phenol
Opis:: The influence of the alkaline pretreatment of wheat straw with use 0.05M solution of NaOH by 22 hours at 25 °C temperature on the effectiveness of anaerobic digestion under mesophilic condition was the subject of this study. The water soaked straw was used as a control. The results showed that alkaline pretreatment improved the solubility of the straw biomass, increasing dissolved COD and concentration of VFA in the feedstock of 10% and 21%, respectively, compared to the water soaked samples. Consequently, the cumulative biogas yield was enhanced by 21.5%, reaching 412.1 mL gVS-1 for the pretreated biomass. The digestates were similar in terms of TS and VS, but it significantly differed in terms of phenols concentration, the content of which was considerably higher both in the feedstock as also as in digestate containing alkaline pretreated straw. Initial concentration of phenols in the feedstock of 27 mg L-1 did not block the anaerobic digestion, although its inhibiting effect is forecasted. It was concluded that soaking the straw at low loading of NaOH (4% of raw mass (w/w)) under ambient conditions can efficiently improve its usability for biogas production.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 246-254
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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