Temat: biofilm - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Isolation and Characterization of Schmutzdecke in Slow Sand Filter for Treating Domestic Wastewater
Autorzy:: Ni'matuzahroh
Fitriani, Nurina
Nuswantara, Eka Narendra
Affandi, Mochammad
Prasongsuk, Sehanat
Kurniawan, Setyo Budi
Powiązania:: https://bibliotekanauki.pl/articles/2202214.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: heterotrophic bacteria
biofilm
schmutzdecke
slow sand filter
Opis:: This research aimed to discover the macroscopic, microscopic, and physiological characteristics and the genus of heterotrophic bacteria found in the schmutzdecke or biofilm layer in slow sand filters. The isolation of heterotrophic bacteria in the schmutzdecke applied the pour plate and quadrant streak method, while the characterization used macroscopic, microscopic, and physiological tests. Samples were taken from the schmutzdecke on top of the filter layer, and they were diluted 3, 4, and 5 times, then grown in Nutrient Agar media in order to isolate heterotrophic bacteria. The results of the research were analyzed using the identification manual books titled Bergey’s Manual of Determinative Bacteriology, 9th edition and Manual for The Identification of Medical Bacteria, 3rd edition. These manuals show the names of the genus of bacteria in the schmutzdecke layer. On the basis of the identification results from macroscopic, microscopic, and physiological tests, there were 4 dominant genera out of 18 living isolates obtained from the schmutzdecke layer, namely Kurthia gibsonii, Bacillus badius, Bacillus firmus, and Bacillus lentus. The similarity percentage of these 4 isolates was 83%, 81%, 85%, and 77% respectively.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 76--88
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Microbial Biofilm of Plastic in Tropical Marine Environment and their Potential for Bioremediation of Plastic Waste
Autorzy:: Afianti, Nur Fitriah
Rachman, Arief
Hatmanti, Ariani
Yogaswara, Deny
Anggiani, Milani
Fitriya, Nurul
Darmayati, Yeti
Powiązania:: https://bibliotekanauki.pl/articles/2086410.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biofilm
microorganism
plastic debris
tropical
marine environment
biodegradation
Opis:: Plastic debris has become a global problem due to its widespread distribution and accumulation in the marine environment. Indigenous bacteria in the marine environment are able to quickly contaminate plastic surface and assemble to form successional plastisphere-specific bacterial. The formation of microbial biofilms on the plastic surface can indirectly initiate the degradation of plastic polymers. The environmental conditions of the tropical region make the growth of microbial biofilms become faster. However, the study on the biodiversity of microorganisms in marine plastic debris is limited to the northern hemisphere, which includes subtropical and temperate regions. This review provides current studies of biodiversity and community structure of plastisphere in tropical environments, including bacteria and microalgae, and their potential to degrade the plastic polymer. A systematic literature search has been conducted using Scopus with different combinations of keywords. In addition, Google Scholar databases were also used to find more studies on some specific topics, including plastic degrading organisms. The climate-associated areas have been grouped according to the latitude of the study site into tropical, subtropical, and temperate latitudes. The microorganisms analyzed in this review are only bacteria, actinobacteria, and microalgae.
Źródło:: Journal of Ecological Engineering; 2022, 23, 4; 261--275
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of Acetic Acid on Denitrification and Dephosphatation Process Efficiencies in Sequencing Batch Biofilm Reactor
Autorzy:: Mielcarek, A.
Rodziewicz, J.
Janczukowicz, W.
Bryszewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/123858.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Sequencing Batch Biofilm Reactor
denitrification
dephosphatation
acetic acid
Opis:: This study investigates the feasibility of using an organic substrate in the form of acetic acid to enable wastewater denitrification in a Sequencing Batch Biofilm Reactor (SBBR). The impact of nitrates presence on the yield of biological dephosphatation was determined as well. The experiment included 296 cycles and was divided into 4 series differing in the load of nitrates. The N:(C and P) ratios were: 7:(140 and 7); 35:(140 and 7); 70:(140 and 7) and 140:(140 and 7). The hydraulic retention time in the reactor was 12h (6h of mixing – dissolved oxygen concentration below 0.1 and 6h of aeration – concentration of dissolved oxygen 3.0±0.8 mgO₂·dm^-3). The study demonstrated that the 30-day adaptation period (60 cycles) was sufficient for the development of a stable biofilm. The C:N ratio of 2 ensured the total nitrogen concentration in the effluent below 1 mgN·dm^-3. The mean efficiency of biological dephosphatation reached 7.0, 17.4, 18.7, and 30.3% in series 1–4, respectively. In the case of series 2 and 3, no significant differences were demonstrated in the total phosphorus concentration in the effluent. In the other series, the differences turned out to be significant.
Źródło:: Journal of Ecological Engineering; 2018, 19, 4; 176-180
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Respirometric Activity of Activated Sludge and Biofilm in IFAS-MBBR System
Autorzy:: Piechna, P.
Żubrowska-Sudoł, M.
Powiązania:: https://bibliotekanauki.pl/articles/124065.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: IFAS-MBBR
activated sludge
biofilm
Oxygen uptake rate
OUR
Opis:: The aim of the presented study was: a) assessment of activity of microorganisms developed in form of activated sludge and biofilm, b) indirect assessment of the role of analyzed biocoenoses in removal of organic compounds in hybrid reactor with moving bed. Oxygen uptake rate tests (OUR) have been used, and obtained results were presented as volumetric activity.(Ѵ^{v^{_o2 , expressed in mg O₂/L·h) and mass activity (Ѵ^{v^{_o2, expressed as mg O₂/g VTS·h). Tests were conducted for three different variants, in which, as the biomass: 1) biofilm was used, 2) activated sludge was used, 3) biofilm and activated sludge were used. The biomass was collected from aerobic reactor from a wastewater treatment plant working in IFAS-MBBR system. The highest volumetric activity was observed for variant with biofilm and activated sludge, and the lowest for variant with biofilm only. Nonetheless, the highest value of oxygen uptake rate related to total volatile solids was observed for variant with biofilm and the lowest for activated sludge. Obtained results suggest, that during this research, at the wastewater treatment plant, the main role in removal of organic pollutants played the biomass developed in form of activated sludge.}}}}
Źródło:: Journal of Ecological Engineering; 2017, 18, 4; 145-151
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Characterization of Biofilms From Selected Synthetic Materials Used in Water Distribution System
Autorzy:: Biedroń, I.
Traczewska, T.
Konieczny, T.
Płaza, G.
Powiązania:: https://bibliotekanauki.pl/articles/952367.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biofilm
metabolic profile
drinking water
bacteria consortia
phenotypic microarray
PM
Opis:: Materials like polyvinyl chloride (PVC), polypropylene (PP), ultra high molecular weight polyethylene (UHMW-PE) are used for the construction of drinking water supply systems. It was found that regardless of the type of material the distribution network is built of, microorganisms formed biofilms on every available surface. The pipes material plays a key role in terms of biofilm formation. Important factors are the surface roughness, adhesives, plasticizers, stabilizers, which can be a source of nutrients for bacteria. The metabolic activity of microorganisms on polymer materials, induces migration of compounds from the material into water. The aim of this study was to present the differences in the structure and the metabolic profile of biofilm formed on the technical materials.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 284-293
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Development of Malaysian Wastewater Polishing Index: Case Study on a Moving Bed Biofilm Reactor
Autorzy:: Kawan, Jamal Ali
Suja, Fatihah
Hasan, Hassimi Abu
Jaafar, Othman
Rahman, Rakmi Abd
Powiązania:: https://bibliotekanauki.pl/articles/124266.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater polishing index
moving bed biofilm reactor
effluent polishing
water reuse
quick assessment
Opis:: Currently, extra treatment of secondary effluent to remove nitrogen and phosphorous may be required for its unrestricted reuse. This can be achieved by installing the wastewater polishing systems (or tertiary treatment). The wastewater polishing solutions are environmentally friendly, cheap and effective. The experiments were conducted on a pilot scale using a Moving Bed Biofilm Reactor (MBBR) with a capacity of 500 L to polish the municipal effluent from organic pollutant, undesirable nutrients and bacteria without the use of disinfectants. The major purpose was to define and apply a model for evaluating polishing of secondary effluent and implement the optimal technology for unrestricted use. Wastewater Polishing Index (WWPI) is a new tool that has been employed for rapidly evaluating of water quality improvement. It can be implemented into any surface water effluent treatment system or for reuse. WWPI can be an important tool designed for decision makers. The total average weight of six parameters (COD, BOD₅, SS, Ammonia nitrogen, Total Phosphorus and Escherichia coli) are defined as the index, each one converted to sub-index which is scaled from zero to one hundred. If none of six parameters exist in the effluent WWPI, it is equal to zero, while if the parameters match the Malaysian’s effluent Standard B, It amounts to one hundred. In turn, WWPI is ninety when all six of them are equal to their corresponding Malaysian National Water Quality Standard (IV) for re-use. The index of wastewater polishing was validated and approved for the pilot MBBR study.
Źródło:: Journal of Ecological Engineering; 2020, 21, 5; 1-8
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: New Approach to Modelling if Sand Filter Clogging by Septic Tank Effluent
Autorzy:: Nieć, J.
Spychała, M.
Zawadzki, P.
Powiązania:: https://bibliotekanauki.pl/articles/124668.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: clogging
filter coefficient
mathematical modelling
sand filter
solids deposition
suspended solids
biofilm processes
Opis:: The deep bed filtration model elaborated by Iwasaki has many applications, e.g. solids removal from wastewater. Its main parameter, filter coefficient, is directly related to removal efficiency and depends on filter depth and time of operation. In this paper the authors have proposed a new approach to modelling, describing dry organic mass from septic tank effluent and biomass distribution in a sand filter. In this approach the variable filter coefficient value was used as affected by depth and time of operation and the live biomass concentration distribution was approximated by a logistic function. Relatively stable biomass contents in deeper beds compartments were observed in empirical studies. The Iwasaki equations associated with the logistic function can predict volatile suspended solids deposition and biomass content in sand filters. The comparison between the model and empirical data for filtration lasting 10 and 20 days showed a relatively good agreement.
Źródło:: Journal of Ecological Engineering; 2016, 17, 2; 97-107
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Enhancement of Dairy Wastewater Treatment in a Combined Anaerobic Baffled and Biofilm Reactor with Magneto-Active Packing Media
Autorzy:: Kisielewska, M.
Dębowski, M.
Zieliński, M.
Krzemieniewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/123507.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biofilm reactor
compartmentalized reactor design
dairy sewage
magneto-active support medium
biogas
phosphorus removal
Opis:: In this study, a new reactor concept was designed for combining the advantages of anaerobic baffled reactors and biofilm reactors for treating dairy wastewater. The magneto-active microporous packing media manufactured by extrusion technology and modified by the addition of relevant amounts of metal catalysts and magnetic activation were used. The effects of active packing media placing in the different functional areas (hydrolysis or methanogenic) on the reactor performance (organic matter and nutrients removal, biogas production) were studied. The highest biogas production of 337 L/d and biogas yield of 415 mL/g COD_removed were achieved when the packing media with magnetic properties were placed in the methanogenic tanks. A stimulatory effect of placing the active packing media in methanogenic tanks on the organic matter removal (86% as COD) and suspended solids elimination from wastewater were noted; however, the magnetic properties did not contribute towards higher organic matter and nutrients removal. Incorporation of metals into the plastic packing media enhanced the phosphorus removal (85–87%).
Źródło:: Journal of Ecological Engineering; 2018, 19, 5; 165-171
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Złoża biologiczne w oczyszczaniu ścieków z recyklingu tworzyw sztucznych
Biofilters in wastewater treatment after recycled plastic materials
Autorzy:: Kania-Surowiec, I
Powiązania:: https://bibliotekanauki.pl/articles/400436.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ścieki
oczyszczanie ścieków
złoża biologiczne
biofilm
recykling tworzyw sztucznych
sewage
wastewater treatment
biofilters
recycling of plastics
Opis:: W niniejszej pracy zaprezentowano możliwości wykorzystania złoża biologicznego w oczyszczaniu ścieków pochodzących z recyklingu tworzyw sztucznych. Istnieje wiele aspektów tego zagadnienia, które należy rozważyć, by można było zastosować dane rozwiązanie technologiczne w przemyśle. Dotyczy to między innymi określenie typów badań laboratoryjnych opierających się na analizie zmian zachodzących w złożu podczas oczyszczania ścieków technologicznych, poznania i dobór czynników warunkujących prawidłowy wzrost biofilmu (błony biologicznej) w złożu oraz opracowanie właściwej koncepcji i prototypu instalacji oczyszczającej dla konkretnego zakładu przetwarzania tworzyw sztucznych. To umożliwi określenie parametrów, które wpłyną na zwiększenie wydajności oczyszczania ścieków przy minimalizacji nakładu finansowego ze strony Firmy. Wybór metody oczyszczania ścieków wiąże się również ze strategią ochrony środowiska danego kraju na poziomie przedsiębiorstw określonej w Polityce Środowiskowej. Jest to dodatkowym argumentem przemawiającym za wykorzystaniem metod biologicznych w oczyszczaniu ścieków przemysłowych.
In this paper the possibility of using biological deposits in wastewater treatment of recycled plastics were presented. There are many aspects of this issue that should be considered to be able to use information technology solutions in the industry. This includes, inter alia, specify the types of laboratory tests based on the analysis of changes in the fluid during the wastewater treatment process, knowledge and selection factors for proper growth of biofilm in the deposit and to develop the right concept and a prototype for a particular processing plant, plastic processing plant. It is possible to determine the parameters that will increase the efficiency of sewage treatment while minimizing the financial effort on the part of the Company. Selection methods of wastewater treatment is also associated with the environmental strategy of the country at the enterprise level specified in the Environmental Policy. This is an additional argument for the use of biological methods in the treatment of industrial waste water.
Źródło:: Inżynieria Ekologiczna; 2013, 32; 74-84
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Combination of Biological Treatment and Ceramic Membrane Filtration – Performance and Maintenance of the Pilot-Scale Installation
Autorzy:: Dzihora, Yuliia
Stolyarenko, Hennadiy
Powiązania:: https://bibliotekanauki.pl/articles/2173341.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water reclamation
moving bed biofilm reactor
membrane bioreactor
flat sheet membrane
ceramic membrane
MF membrane
microfiltration membrane
Opis:: Membrane separation technologies equipped with ceramic membranes have shown good operational results, high robustness and reliability. In this study, a combination of Moving Bed Biofilm Reactor (MBBR) & Membrane Bioreactor (MBR) (pilot scale) was investigated for fouling control optimisation. The system was operated with flat-sheet microfiltration (MF) ceramic membranes. Because of the attached biofilm in the MBBR, it could work stably and effectively with different loading rates, which reduces the load on the membrane surface. Influences of sludge recirculation and flux on the transmembrane pressure (TMP) value and thus impact on fouling development were investigated. Intensive aeration, backwash as well as the implementation of NaOCl were used as physical and chemical cleaning, respectively. The chemical cleaning efficiency reaches up to 70% and could be increased after further research. After the determination of optimal operational conditions, the normalised permeability value (PN) was effectively maintained with a slight TMP increase.
Źródło:: Journal of Ecological Engineering; 2022, 23, 8; 21--29
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Effectiveness of Sequencing Batch Biofilm Reactor Technology to Treat Domestic Wastewater in Basrah City
Autorzy:: Al-Rekabi, Wisam S.
Al-Khafaji, Samar A.
Hassan, Ayman H.
Janna, Hussein
Powiązania:: https://bibliotekanauki.pl/articles/1955515.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: SBBR
sequencing batch biofilm reactor
domestic wastewater
COD
NH3-N
ammoniacal nitrogen
TN
total nitrogen
TP
total phosphorous
Opis:: The efficiency of a Sequencing Batch Biofilm Reactor (SBBR) for domestic wastewater treatment in Basrah was assessed. The experiments were carried out via a laboratory-scale SBBR cylindrical vessel used for this study, with geometric volume of 26 L, having an internal diameter of 15 cm, a height of 40 cm, and a working volume of 13 L. After a one-month start-up cycle for biofilm growth on the fibrous filler, the SBBR research test period lasted two months. The SBBR was run for three weeks to ensure that the biological treatment systems were mature and those steady-state requirements were reached, throughout the starting-up phase of operation, the removal efficiency for COD, NH3-N, TN, and TP were 95%, 89%, 85%, and 93% respectively. The impact of aeration time on the SBBR efficiency was also tested by removal of COD, ammonia, total nitrogen TN, and total phosphorous TP under different levels of dissolved oxygen DO (2.0 – 6.8) mg\L. The SBBR method proved to be an effective method for treating domestic wastewater in Basrah city. The COD, NH3-N, TN, and TP concentrations in the effluent were 42, 6.7, 9.0, and 1.0 mg/L, respectively, with the removal efficiency rates of 90.32 %, 86.24 %, 84.75 %, and 84.38 %. When comparing the SBBR effluent value to the WHO, European, Iraqi, and Chinese discharge standards, it was observed that the COD concentration (42 mg/L) met these standards. while ammonia (6.7 mg/L), TN (9.0 mg/L), and TP (1.0 mg/L) met the WHO, European, and Chinese standard only.
Źródło:: Journal of Ecological Engineering; 2021, 22, 8; 234-242
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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