Temat: anaerobic digestion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wykorzystanie odpadów biodegradowalnych do produkcji biogazu jako alternatywnego źródła energii odnawialnej
The use of biodegradable waste to produce biogas as an alternative source of renewable energy
Autorzy:: Owczuk, Marlena
Wardzińska, Dorota
Zamojska-Jaroszewicz, Anna
Matuszewska, Anna
Powiązania:: https://bibliotekanauki.pl/articles/470833.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:: biogas
anaerobic digestion
technology
Opis:: Waste products from the agriculture industry and other sectors are creating a waste problem with a negative environmental impact. Such effects can be minimized by further processing methods. One method, which is gaining increased importance around the world, is anaerobic digestion, for which biodegradable waste is a valuable source of raw material (Ryckebosch et al. 2011; Deublein, Steinhauser 2008). The paper discusses the technological process of biogas production, as well as the most commonly used methods of purification and refining. It also identifies the potential ways of using the resulting product (CHP, biofuels).
Źródło:: Studia Ecologiae et Bioethicae; 2013, 11, 3; 133-144
1733-1218
Pojawia się w:: Studia Ecologiae et Bioethicae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of quantity of biogas from sewage sludge
Autorzy:: Sikora, J.
Jakubowski, T.
Płaczek, M.
Powiązania:: https://bibliotekanauki.pl/articles/101420.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: sewage sludge
biogas
anaerobic digestion
Opis:: Renewable energy sources have been amongst crucial elements of the European Union policy for a long time. Currently, they have become significant in terms of possibilities of the technology development, which may limit the effects and duration of the economic, energy and climatic crisis. The Directive 2009/28/EC obliges the increase of the share of Renewable Energy Sources in the final energy consumption up to 20% (in Poland up to 15%) by 2020. Sewage sludge is waste that significantly affects the aspects of environment. The research considered the rationality of using the waste for the production of biomethane. The purpose of the work was to determine the dynamics of biogas production from sewage sludge of municipal origin. Its scope included a review of the literature based on the Polish and European law. Issues of technology, production and use of biogas and residue were presented. The research was based on determining the properties of sewage sludge - raw and after stabilization, and carrying out a fermentation process for a period of 30 days. The validity of using sewage sludge as substrate for biogas production was confirmed.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2018, IV/1; 1087-1097
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
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:: Organic waste used in agricultural biogas plants
Autorzy:: Kazimierowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/123201.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: agricultural biogas plants
organic waste
anaerobic digestion
biogas
Opis:: Treatment of organic waste is an ecological and economical problem. Searching method for disposal of these wastes, interest is methane fermentation. The use of this process in agricultural biogas plants allows disposal of hazardous waste, obtaining valuable fertilizer, while the production of ecologically clean fuel – biogas. The article presents the characteristics of organic waste from various industries, which make them suitable for use as substrates in agricultural biogas plants.
Źródło:: Journal of Ecological Engineering; 2014, 15, 2; 88-92
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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: 6.

Tytuł:: Cascade reactor system for methanogenic fermentation
Autorzy:: Jabłoński, S.
Krasowska, A.
Januszewicz, J.
Vogt, A.
Łukaszewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/115487.pdf
Data publikacji:: 2011
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Tematy:: biogas
anaerobic digestion
whey
UASB
methane
sewage
fermentation
multi-step digestion
Opis:: Methanogenic fermentation is promising method of obtaining environment-friendly energy. Moreover it can be used for disposal of sewage and other organic waste. However process complexity and susceptibility makes it difficult for application on a large scale. A new laboratory stand for studding of anaerobic digestion was developed. Three fermentation vessels and automated control system provides flexibility essential in investigation of digestion of different substrates and testing of different reactors configurations. Cheese whey is a troublesome dairy waste, potentially suitable for biogas production. Stable fermentation conditions for whey fermentation were obtained with the organic loading rate of 5 kg COD/m3 and methane production efficiency of 0,3 m3/kg COD. On the basis of obtained data the size of small biogas plant for average dairy was calculated.
Źródło:: Challenges of Modern Technology; 2011, 2, 4; 37-41
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Optimizing biomethanation of a lignocellulosic biomass using indigenous microbial-cellulases systems
Autorzy:: Ngumah, C.
Ogbulie, J.
Orji, J.
Amadi, E.
Nweke, C.
Allino, J.
Powiązania:: https://bibliotekanauki.pl/articles/80248.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biomethanation
lignocellulosic waste
anaerobic digestion
biogas
biowaste
recalcitrant plant
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

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: 9.

Tytuł:: Full-Scale Application of Up-flow High Rate Anaerobic Reactor with Substrate Modification and Effluent Recirculation for Sugarcane Vinasse Degradation and Biogas Generation
Autorzy:: Harihastuti, Nani
Yuliasni, Rustiana
Djayanti, Silvy
Handayani, Novarina Irnaning
Rame, Rame
Prasetio, Adi
Kadier, Abudukeremu
Powiązania:: https://bibliotekanauki.pl/articles/1839601.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: anaerobic digestion
biogas
CaCO3 addition
recirculation
vinasse wastewater
Opis:: This study was aimed at studying the potential of biogas (methane) production from vinasse wastewater in real full-scale application using a two-stage sequencing Up-flow High Rate Anaerobic Reactor (UHRAR), with effluent recirculation and substrate modification. A batch experiment was initially conducted prior to the full-scale application experiment. The batch experiment was done with experimental condition variable: undiluted sample (pH 6) and diluted samples (pH: 5; 6 and 7), while pH and methane production were observed for 50 days. Full-scale application was carried out in two-stage UHRAR reactors with volume 60 m3, HRT 40 d and OLR 60.1–104 kg COD/m3•d. The observation lasted for 32 d. The result from the batch experiment showed that the diluted samples achieved higher COD degradation and methane generation than the undiluted sample. The optimum condition occurred at pH 7, with theoretical methane yield of 7.5–10.64 L CH4 per kg COD. In turn, in full scale application, at day 32, COD removal was 71% (69.1 kg COD/d removed), with methane production was 36.72 m3 CH4/d. Methane production per COD removed was 0.53 m3 CH4/kg COD•d. Substrate modification and effluent recirculation could improve the substrate biodegradability, maintain microbial diversity and enrich nutrients in the reactor.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 314-324
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Ispol'zovanie otkhodov biodizel'nogo proizvodstva dlja povyshenija proizvoditel'nosti biogazovykh ustanovok
Using waste biodiesel production to increase productivity of biogas plants
Autorzy:: Polishuk, V.
Lobodko, N.
Polishuk, A.
Powiązania:: https://bibliotekanauki.pl/articles/76985.pdf
Data publikacji:: 2014
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: crude glycerol
biodiesel production
biogas
cattle manure
anaerobic digestion
profitability
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 3
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Porównanie wydajności produkcji biogazu w procesie fermentacji metanowej wybranych roślin energetycznych
Comparison of biogas output during methane fermentation of selected energy plants
Autorzy:: Grala, A.
Dudek, M.
Zieliński, M.
Dębowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/1819431.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: rośliny energetyczne
fermentacja metanowa
biogaz
energy plants
anaerobic digestion
biogas
Opis:: Ze względu na obowiązek osiągnięcia przez Polskę do końca 2010 r. wskaźnika 7,5% energii pochodzącej ze źródeł odnawialnych wzrosło zainteresowanie nowymi gatunkami roślin, które charakteryzują się wysokim plonem biomasy. Biomasa staje się surowcem coraz bardziej poszukiwanym przez zakłady energetyczne oraz użytkowników indywidualnych [1]. Obecnie prowadzi się wiele prac badawczych nad biogazowaniem roślin z upraw energetycznych. Eksperyment opisany w niniejszym artykule przeprowadzony został z wykorzystaniem dwóch gatunków trawy z rodziny wiechlinowatych, Miscanthus giganteus i M. sacchariflorus. Ze względu na dużą zawartość lignocelulozy gatunki te często wykorzystywane są do produkcji biopaliw.
Efficient conversion of plant material in the biogas is a challenge due to the complex structure of the cell wall of plants. In order to facilitate rapid and effective hydrolysis of carbohydrates pretreatment of biomass [2] is required. Pretreatment of lignocellulosic materials can be carried out in a physical, chemical, physical-chemical and biological way [3]. Finding the right method of conducting the process of conditioning before anaerobic digestion is the subject of numerous studies. They are looking for methods that help to obtain a gas with higher efficiency. The reported study was undertaken in order to determine the effect of preliminary hydrothermal depolymerization on the efficiency of methane fermentation process in terms of quantity and composition of biogas obtained from two grass species: Miscanthus giganteus and Miscanthus sacchariflorus. The substrate was mechanically fragmented using a shredding machine Robot Coupe Blixer, and then prepared the plant material underwent hydrothermal depolymerization. This process was conducted in a pressure reactor with a active volume of 2.3 dm3. The reactor was fed with 600 g of Miscanthus biomass of hydration of 90% and organic matter content of 10% in fresh weight. The reactor with the plant material was incubated at 200°C and a pressure of 17 Ba for 30, 60 and 120 minutes in a muffle furnace. The processed plant substrate was next subjected to mesophilic fermentation. Application of hydrothermal depolymerization led to an increase in biogas quantity and improve its quality, the longer the conditioning time, the better outcome of this process. Due to content of methane in the biogas and the calorific value of methane Miscanthus saccharifloru was found to be more efficient. The study showed the relationship between the time of thermal depolymerization plant substrate, and the amount and composition of biogas produced in the process of methane frmentation. With the time of thermal depolymerization of both species tested the amount of the resulting biogas increased. Comparing two of the studies plants for their use as feedstock in biogas farm had a higher potential for Miscanthus sacchariflor. Comparing the calorific value of the two grass species, we can see that a much better substrate proved to be the Miscanthus saccharifloru. this species also proved to be particulary vulnerable to heat. Taking into account the ratio of the energy value of the resulting biogas for thermal conditioning of the time proved to be effective biogas Miscanthus sacchariflour. Based on the survey it was found that the conditioning process improves the fermentation process. Batter substrate in terms of quality and quality of biogas has proved to be a Miscanthus sacchariflour . Miscanthus sacchariflour resulted in obtaining biogas methane content min 12 prec. more than the Miscanthus giganteus fermentation.
Źródło:: Rocznik Ochrona Środowiska; 2011, Tom 13; 1360-1371
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Porównanie uwarunkowań ekonomiczno-prawnych produkcji biogazu rolniczego w Polsce i Niemczech
Comparison of Law And Economics Conditions within Agricultural Biogas Production in Poland and Germany
Autorzy:: Kowalczyk-Juśko, Alina
Kościk, Bogdan
Powiązania:: https://bibliotekanauki.pl/articles/38890059.pdf
Data publikacji:: 2006
Wydawca:: Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:: energia odnawialna
biogaz
fermentacja beztlenowa
renewable energy
biogas
anaerobic digestion
Opis:: Renewable energy production is one of the priority activities underlined in many documents, which describe main goals of development of Poland. One of technologies to produce electricity and heat power in co-generation is anaerobic digestion process. That kind of technology is now developing in many European countries. Particularly fast development in that field can be observed in Germany, where over two thousand agricultural biogas plants are operating. In Poland creating of agricultural biogas plants meets a lot of procedures obstacles and in the same way payment for “green” energy doesn’t give enough encouragement to develop an investment procedures.
Źródło:: Roczniki Wydziału Nauk Prawnych i Ekonomicznych KUL; 2006, 2, 2; 39-54
1896-6365
Pojawia się w:: Roczniki Wydziału Nauk Prawnych i Ekonomicznych KUL
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Substrate influence on the structure of methanogenic Archaea communities during anaerobic digestion
Autorzy:: Dąbrowska, D.
Bułkowska, K.
Ciesielski, S.
Powiązania:: https://bibliotekanauki.pl/articles/363216.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: anaerobic digestion
Archaea community structure
biogas
PCR-DGGE
fermentacja metanowa
biogaz
Opis:: This study compares the diversity of methanogenic Archaeal communities that developed during biogas production in reactors fed with different substrates. Reactor I was fed with silages of maize and of alfalfa and timothy; and Reactor II was fed with these silages plus pig slurry and glycerol as co substrates. The Archaeal community structure was studied using polymerase chain reaction––denaturing gradient gel electrophoresis based on the 16S rRNA gene. In both reactors, Methanosphaerula palustris was most abundant, and species belonging to Methanolinea, Methanoculleus, and Methanotorris were present. Only Reactor I, where the ammonia concentration was lower, had species belonging to Methanospirillum and Methanosarcina. Thus, it appears that addition of pig slurry increased the ammonia concentration, which inhibited the growth of Methanospirillum and Methanosarcina.
Źródło:: Environmental Biotechnology; 2015, 11, 2; 41-47
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Optymalny czas cyklu beztlenowego bioreaktora sekwencyjnego
Optimal cycle time for an anaerobic sequencing batch bioreactor
Autorzy:: Zamojska, A.
Szewczyk, K. W.
Powiązania:: https://bibliotekanauki.pl/articles/2070321.pdf
Data publikacji:: 2009
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: reaktor sekwencyjny
biogaz
fermentacja metanowa
sequential batch reactor
biogas
anaerobic digestion
Opis:: Zbadano wpływ długości czasu pojedynczego cyklu na produkcję biogazu z serwatki w mezofilowym beztlenowym reaktorze kolumnowym (objętość czynna 13,1 dm3), pracującym w trybie sekwencyjnym. Przeprowadzono cztery serie pomiarowe (czasy cykli: 12, 24, 48 i 72 godziny), przy zachowaniu stałego obciążenia reaktora (1,3 g ChZT dm-M-1). Uzyskane wyniki wskazują na istnienie optymalnego czasu cyklu, zapewniającego maksymalną produkcję biogazu.
The steady-state performance of a mesophilic anaerobic sequencing batch reactor treating acid whey as a function of cycle time was investigated. Four different cycle times were used in experiments: 12, 24, 48 and 72 h. The reactor load was kept constant and equal to 1.3 g COD dm-M-1. The existence of optimum cycle time with maximum biogas production was revealed by the results obtained.
Źródło:: Inżynieria i Aparatura Chemiczna; 2009, 3; 123-124
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Wpływ diazynonu (Basudin 25EC) na proces fermentacji metanowej komunalnych osadów ściekowych
Impact of Diazinon (Basudin 25EC) on the Anaerobic Digestion Process of Municipal Sewage Sludge
Autorzy:: Sadecka, Z.
Myszograj, S.
Sieciechowicz, A.
Płuciennik-Koropczuk, E.
Powiązania:: https://bibliotekanauki.pl/articles/1818611.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: insektycydy
toksyczność
fermentacja metanowa
biogaz
insecticides
toxicity
anaerobic digestion process
biogas
Opis:: The process of methane fermentation is a labile process, sensitive to changes in the environment and susceptible to various substances which may turn out to be toxic for anaerobic biocenosis. The process may be inhibited by both the substances supplied together with the substrate and also the products resulting from the decomposition phases. The group of toxic substances which influences the fermentation process comprises heavy metals, organic compounds, ammonia nitrogen, lower organic acids, nitrogen or sulphur compounds, add to this a large group of organic micropollutants such as hormones added to fodder, disinfectants, insecticides, chemotherapeutics, antibiotics or chemical plant protection products which are all overlooked. These compounds, while occurring in the media subjected to anaerobic stabilisation, may cause a decrease in the speed of the process, possibly also causing its disruption. The inhibitory effect of various chemical compounds on the course of the fermentation process may be evaluated on the basis of the characteristics of the microorganism community, dynamics of changes in its structure and activity of the population. The determination of the activity of enzymes participating in the methane fermentation may be used to evaluate the impact of xenobiotics on the fermentation process and the efficiency of methane production. In the operational practice referring to the fermentation equipment, the impact of biotic and abiotic factors may be evaluated on the basis of changes in the process parameters. The changes in the quantity of microorganisms and the low enzymatic activity cause a decrease in the efficiency of biogas production including methane, as well as a reduction in the effectiveness of the process measured by the loss of the content of organic compounds. The paper presents the results of laboratory tests, concerning the effect of diazinon on the course of biogas production in the process of the methane fermentation of municipal sewage sludge. Diazinon is one of the representatives of phosphate insecticides and an active substance of the commercial preparation bearing the name Basudin 25EC. The effect of the preparation on the course of the process of methane fermentation of sewage sludge was studied within a dose range from 0.5 to 30 mg/ dm-3. The characteristic indicators of the course of anaerobic stabilisation of sewage sludge include the quantity and the composition of the fermentation gas in reference to the fermentation temperature and time. Based on the changes of these parameters, the inhibitive effect of diazinon contained in the Basudin 25EC technical preparation was evaluated. The biogas production in sludge with various doses of diazinon was assumed as a measure of toxicity in reference to the control sludge. The results of the studies showed that: Anaerobic microorganisms are characterised by sensitivity to the Basudin 25EC utility preparation (with a content of 25% diazinon). The first symptoms of the inhibition of the fermentation process occurred at doses of the preparation amounting to 0.5, 1 and 2 mg/dm-3. The inhibition is confirmed by a decrease in the biogas production of about 10%. The intensification of inhibition symptoms was evident at doses ranging from 4 to 8 mg/ dm-3. The reduction in biogas production ranged from 13,0–25,0%. In the sludge where the greatest dose of the preparation was applied, that is, 30 mg/ dm-3, the biogas efficiency went down from 522 dm-3/kg of dry matter to 57.0 dm-3/kg of dry matter. A 10 mg/ dm-3 dose of Basudin 25EC, causing a 60% decrease in the efficiency of biogas production (from 522 to 211 dm-3/kg of dry matter) must be regarded as toxic for the process of methane fermentation of municipal sludge sewage.
Źródło:: Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 931-942
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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