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Wyświetlanie 1-15 z 59
Tytuł:
Effect of hybrid method of excess sludge disintegration on the increase of their biodegradability
Autorzy:
Zawieja, I.
Wolski, P.
Powiązania:
https://bibliotekanauki.pl/articles/207489.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biodegradation
sewage sludge
biodegradacja
osady ściekowe
Opis:
The main objective of the disintegration of sewage sludge is to obtain a greater susceptibility of sludge on subsequent biotechnological processes. In order to determine the best parameters of the disintegration of excess sludge examined, the effectiveness of hybrid methods, i.e. thermal disintegration aided ultrasonic disintegration. Support thermal method by disintegration by active operation of the ultrasonic field results in high efficiency of the process, estimated by disintegration degree of hybrid modified sludge. Based on the obtained disintegration degree in the excess sludge after the individual thermal method (60 °C, time of heating 3 h) and thermal-ultrasonic method (60 °C, 3h and acoustic power of 214.21 W, sonication time 600s) a significant i.e. 35.98% increase in the disintegration degree of hybrid modified sludge was observed.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 154-165
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal treatment as sustainable sewage sludge management
Autorzy:
Pająk, T.
Powiązania:
https://bibliotekanauki.pl/articles/208195.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
heat treatment
incineration
wastewater treatment
flue gas cleaning
sewage sludge drying
sludge management
sludge utilization
osady ściekowe
obróbka cieplna
spopielanie
oczyszczanie ścieków
oczyszczanie gazów odlotowych
suszenie osadów ściekowych
zagospodarowanie osadów ściekowych
wykorzystanie osadów
Opis:
Recent changes to the sewage sludge management can be attributed to the restrictive deadlines of implementing EU regulations concerning wastewater treatment and sewage sludge utilization. Drying and thermal treatment of sewage sludge is becoming increasingly popular. From nearly zero share of thermal treatment methods in the sewage sludge management currently the share exceeds 35%. Implementation of numerous investments is facilitated by respective structure programs in the scope of environmental protection supported with EU funds. The analysis of chosen aspects of new operational experience constitutes the main part of the present paper. Analysed were domestic operational practices concerning the applied technologies of sewage sludge drying, their effectiveness and reliability. The aspect of effectiveness of flue gas cleaning with the use of sodium bicarbonate, method characteristic for many Polish sewage sludge incineration facilities, is discussed in detail. The analysis is based on the current operational data and own research.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 41-53
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sewage sludge gasification: theoretical and experimental investigation
Autorzy:
Werle, S.
Powiązania:
https://bibliotekanauki.pl/articles/207853.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
gasification
nitrogen
osady ściekowe
gazyfikacja
azot
Opis:
Results of experimental and theoretical investigations of a sewage sludge gasification process have been presented. They show that higher oxygen content in sewage sludge causes a reduction in the reaction temperature. As expected, increasing the air flow rate caused a decrease in the heating value of the produced gas. A higher amount of oxidizer increases the amounts of noncombustible species and volumetric fraction of nitrogen, thus reducing the heating value of the obtained gas. Higher water content in the sewage sludge affects the gasification gas composition. As a result, combustible components are in the minority in the syngas.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 25-32
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of sorption characteristics of anaerobically digested dewatered municipal sewage sludge
Autorzy:
Varank, G.
Demir, A.
Bilgili, M. S.
Top, S.
Sekman, E.
Yazici, S.
Erkan, H. S.
Powiązania:
https://bibliotekanauki.pl/articles/206920.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
municipal sewage sludge
sorption
chlorophenol
sewage sludge
adsorption isotherms
wastewater treatment
ścieki komunalne
sorpcja
chlorofenol
osady ściekowe
izotermy adsorpcji
oczyszczanie ścieków
Opis:
Physical, chemical, morphological properties and sorption characteristics of anaerobically digested dewatered municipal sewage sludge have been investigated including the surface area, pore size distribution, chemical composition, surface chemistry structure, surface physical morphology, mineralogy, cation exchange capacity, heavy metal content, total solid, total volatile solid, total Kjeldahl-N, total phosphorus content of the sewage sludge. The sorption potential of sewage sludge for the removal of 4-CP and 2,4-DCP from aqueous solutions was examined by investigating their adsorption isotherms and kinetics in a lab-scale batch study. Findings of this study clearly showed that sewage sludge provides chlorophenol removal in the landfill body as disposed with solid wastes.
Źródło:
Environment Protection Engineering; 2014, 40, 4; 119-133
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of food waste co-digestion on the quality of the digested sludge and leachate parameters
Autorzy:
Miodoński, Stanisław
Kokurewicz, Łukasz
Szetela, Ryszard
Muszyński-Huhajło, Mateusz
Janiak, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2032899.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
methane
frying oil
osad ściekowy
metan
frytura
Opis:
Co-digestion of sewage sludge with other wastes allows a significant increase in energy production from fermentation gas, at the expense of a potential increase in the mass of sludge to be disposed of and the nitrogen load in the leachate. The paper presents the results of research on the co-digestion of sewage sludge with used frying oil and restaurant waste. The resulting increase in gas volume production was significant (60 and 45%, respectively) with virtually no increase in digester sludge mass. The capillary suction time tests showed no effect of co-digestion on the filtration properties of the digested sludge.
Źródło:
Environment Protection Engineering; 2020, 46, 4; 99-110
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of a biopreparation with cultures of effective microorganisms to the processing of wastewater sludge on a semi-industrial scale
Autorzy:
Grabas, M.
Tomaszek, J.
Czerwieniec, E.
Masłoń, A.
Łuczyszyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/208177.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wastewater sludge
microorganisms
odour emissions
osady ściekowe
mikroorganizmy
emisja odorów
Opis:
The conditions have been examined under which selected groups of microorganisms might be applied to prevent or significantly reduce the generation of odour from the processing and storage of the wastewater sludge. A series of experiments were conducted on a semi-industrial scale, using effective microorganisms (EM) activated in molasses solutions. The analysis of the results showed that the biopreparation modified the biochemical processes most effectively when a structural material was added to the sludge. The processing of the sludge with added EM caused a 20–26% reduction in odour emissions, despite an increase in ammonia emissions. It also led to a higher dry matter content, which indicates a better dewatering ability of the sludge treated with EM. It can be concluded that the treatment of wastewater sludge with EM and the structural material when the C/N ratio is low can help achieve the desired goal of reducing the odour emission.
Źródło:
Environment Protection Engineering; 2016, 42, 1; 33-44
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of bulking agents for composting of sewage sludge
Autorzy:
Malińska, K.
Zabochnicka-Świątek, M.
Powiązania:
https://bibliotekanauki.pl/articles/206989.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
bulking agents
composting
osady ściekowe
substancje wypełniające
kompostowanie
Opis:
The scope of this work covered: laboratory determination of bulk density, air-filled porosity, mechanical strength, water holding capacity of bulking agents, i.e. straw, woodchips and sawdust, and composting mixtures of sewage sludge and selected bulking agents at the ratios of 1:0.3; 1:0.6; 1:1 (d.b.), as well as simulation of bulk density and air-filled porosity in function of composting pile depth for the composting mixtures. Simulation of changes in bulk density and air-filled porosity was performed for a 2 m high composting pile. The results showed that mixing sewage sludge with woodchips in the ratio of 1:1 (d.b.) allows optimal moisture content, C/N ratio and air-filled porosity across the composting pile.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 91-103
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the influence of composts made of sewage sludge, ash from power plant, and sawdust on floristic composition of plant communities in the plot experiment
Autorzy:
Wójcikowska-Kapusta, A.
Urban, D.
Baran, S.
Bik-Małodzińska, M.
Żukowska, G.
Pawłowski, A.
Czechowska-Kosacka, A.
Powiązania:
https://bibliotekanauki.pl/articles/207686.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
compost
sewage sludge
mine sulfur
Jeziórko
kompost
osady ściekowe
kopalnia siarki
Opis:
Floristic studies were conducted in 2011 and 2012 on the soil reclaimed using composts made of sewage sludge with the addition of various amounts of ash from power plant and sawdust. The experiment was carried out in 2002 on devastated soilless formation in the area of “Jeziórko” sulfur mine. Strongly acidic soilless formation (weak loamy sand) was reclaimed using post-flotation lime for de-acidification at the dose of 300 t/ha and compost in various variants: municipal sewage sludge, sewage sludge (80%) + ash (20%), sewage sludge (70%) + ash (30%), and sewage sludge (70%) + sawdust (30%). The compost was added at following doses of dry weight: 90, 180, and 270 t/ha. In the prepared plots, each with the area of 15 m2, a mixture of reclamation grasses was sown: Festuca pratensis –41.2%, Festuca rubra – 19.2%, Lolium perenne – 14.7%, Lolium multiflorum –12.4%, Dactylis glomerata – 6.5%, Trifolium pratense – 6%. The phyto-indication method was used to evaluate the impact of different ways of the soilless formation remediation on the habitat development. The assessment took into account following indicators: soil moisture, trophism, pH, organic matter content, resistance to salinity, and increased content of heavy metals. The largest number of species was found on plots where compost made of sewage sludge was used, while the smallest – on those reclaimed with sewage sludge compost with sawdust addition. In terms of habitat conditions, species preferring wet habitats typical of fresh soils, trophism of the subsoil corresponding to the abundant soils (eutrophic), neutral soil reaction, and subsoil with organic matter like in humus and mineral soils, dominated. The most favorable habitat conditions were found in plots reclaimed using sewage sludge compost.
Źródło:
Environment Protection Engineering; 2017, 43, 2; 129-141
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on activated sludge flocs morphology and composition in a full-scale wastewater treatment plant in Poland
Autorzy:
Liwarska-Bizukojc, Ewa
Andrzejczak, Olga
Solecka, Monika
Powiązania:
https://bibliotekanauki.pl/articles/207156.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
filamentous bacteria
biomass
activated sludge
WWTP
bakterie nitkowate
biomasa
osad czynny
Opis:
This work is a comprehensive study of a full-scale municipal wastewater treatment plant (WWTP) in the city of Zgierz (Poland) aiming at the estimation of the impact of seasonal changes of temperature on flocs morphology, biomass concentration, quantity of filamentous bacteria, content of polyhydroxybutyrate (PHB) and composition of microinvertebrates in the activated sludge system. Two short-term measurement campaigns, in winter and in summer, were carried out under dry weather conditions. It occurred that lower temperatures (11.1–14.6 °C) had hardly any effect on flocs size or concentration of activated sludge biomass in the full-scale activated sludge system treating municipal wastewater. They did not aggravate the biosynthesis of PHB either. However, decreasing temperature favored the growth of filamentous bacteria and led to the elevation of the sludge volume index (SVI). In spite of this, it did not induce any bulking events. Irrespective of the season, the groups of crawling ciliates, attached ciliates and testate amoebae, indicating good performance of the full-scale plant tested, were predominant.
Źródło:
Environment Protection Engineering; 2019, 45, 2; 69-82
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phosphorus speciation in sewage sludge
Autorzy:
Bezak-Mazur, E.
Mazur, A.
Stoińska, R.
Powiązania:
https://bibliotekanauki.pl/articles/208185.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chlorine compounds
sewage sludge
wastewater treatment
activated sludge
iron chlorides
phosphorus speciation
phosphorus
związki chloru
osady ściekowe
oczyszczanie ścieków
osad czynny
chlorki żelaza
specjacja fosforu
fosfor
Opis:
Excessive sewage sludge in terms of contained phosphorus speciation forms has been characterized. The analysis allowed identification of mobile forms of phosphorus in sewage sludge. Quantification of mobile forms of phosphorus is very important for its recovery directly from sewage sludge or for its application for natural purposes. Various phosphorus speciation methods have been presented. The results of the sewage sludge speciation conducted by means of two types of wastewater treatment (EvU-Perl technology and activated sludge) have been compared. The analysis covered the effect of such physiochemical factors as oxygenation, use of ultrasound and precipitation with iron chloride(III). It was concluded that changes in physiochemical conditions lead to alterations in the content of phosphorus speciation forms in sewage sludge.
Źródło:
Environment Protection Engineering; 2014, 40, 3; 161-175
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on co-pyrolysis of sewage sludge with coal
Autorzy:
Tan, Z.-X.
Ai, P.
Li, Y.-M.
Ji, X.-Y.
Feng, W.
Powiązania:
https://bibliotekanauki.pl/articles/207582.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal
carbon dioxide
sewage sludge
co-pyrolysis
FTIR analysis
coal sludge
thermal reactions
węgiel
dwutlenek węgla
osady ściekowe
FTIR
szlam węglowy
reakcje termiczne
kopiroliza
piroliza osadów ściekowych
Opis:
Co-pyrolysis characteristics of sludge with coal and sludge briquetted with coal were studied by the TG-FTIR method. From TG data, weight loss of sludge briquetted was higher than that of sludge and sludge and coal which means that thermal reaction effect of sludge briquetted is better than those of other two materials. Gas products of pyrolysis were CO, CO2, H2O, alcohol, ketone, acid, hydrocarbon, amine and azine from the FTIR analysis. At last, evolving patterns of the pyrolyses and the yields of their gas products have been recorded, providing extremely important data on the mechanism of the process.
Źródło:
Environment Protection Engineering; 2014, 40, 1; 117-126
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytoremediation of urea fertilizer factory wastewater by teak (Tectona grandis)
Autorzy:
Yavari, S.
Malakahmad, A.
Sapari, N. B.
Powiązania:
https://bibliotekanauki.pl/articles/207362.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
phytoremediation
nitrogen removal
urea
Tecona grandis
sludge
fitoremediacja
usuwanie azotu
mocznik
ścieki
Opis:
Urea manufacturing discharge contains a high load of nitrogen, a pollutant which needs advanced technologies to be reduced to desirable levels. However, these advanced technologies are expensive due to the complex process and cost of chemicals and maintenance. Phytoremediation has been recently considered for N removal from various wastewaters. However, the common phytoremediation plants (reeds and grasses) are not able to remove N effectively due to the recyclable nature of N through decomposition processes. Therefore, they require periodic harvestings which impose a high cost on system. In this study, the growth and phytoremediation potential of teak (Tectona grandis), a tropical timber plant, to treat the urea manufacturing wastewater was evaluated. Eight month old teak seedlings received 4 different concentrations of N in bench-scale constructed wetlands every 4 days for 8 weeks. The solution volumes supplied to each container and plant biomass, N recovery, and tissue nutrient concentration were measured. Teak plants showed an escalation in wastewater N uptake with increasing amount of supplied N. Total dry weight was positively correlated with total N supplied. Teak seedlings showed a considerable potential for removing nitrogen when they were supplied with up to 5 g N per pot volume (4 dm3) during a two-month experiment.
Źródło:
Environment Protection Engineering; 2017, 43, 4; 5-15
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing properties of sewage sludge for energy use
Autorzy:
Król, Karol
Iskra, Krzysztof
Ferens, Wiesław
Miodoński, Jan M.
Powiązania:
https://bibliotekanauki.pl/articles/207667.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
physical properties
calorific value
osady ściekowe
właściwości fizykochemiczne
wartość opałowa
Opis:
The properties of sewage sludge in the context of their further energy use have been examined. For this purpose, 34 samples of sewage sludge from municipal sewage treatment plants from the area of Lower Silesia with a capacity higher than the 2000 population equivalent (PE) with separate sludge management were tested. As part of the study, tests were made to determine the technological usefulness of fuels and their elemental composition, i.e., technical analyses and elemental analyses. The obtained results show a large diversity of basic physicochemical properties of the tested sewage sludge. The share of volatile components important for energetic use ranged from 38.4 to 59.8 wt. %. The content of carbon (C) in the mass of tested sewage sludge ranged from 22.4 to 39.2 wt. %, which means that they have a lower content of elemental carbon compared to solid fuels. The higher heating value (HHV) of sewage sludge ranged from 9.3 to 17.4 MJ/kg dry mass.
Źródło:
Environment Protection Engineering; 2019, 45, 4; 61-73
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microfauna composition of activated sludge in domestic and industrial sewage activated sludge systems
Autorzy:
Czapluk, B.
Rutkowski, R.
Rybak, J.
Powiązania:
https://bibliotekanauki.pl/articles/207418.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
activated sludge
industrial sewages
microfauna
biodiversity
osad czynny
ścieki przemysłowe
mikrofauna
bioróżnorodność
Opis:
The microfauna in activated sludge deriving from two different wastewater treatment plants has been compared. Investigations were conducted during the period of seven months taking into account the seasonal changes of microfauna. One studied plant received mainly industrial (70%) and some part of domestic (30%) sewage, and the other mainly domestic sewage (90%). The aim was to compare both plants in terms of occurrence and abundance of key group of microfauna. The determination of key groups and taxa along with biodiversity indices showed that they have potential value as indicators of different conditions characteristic for both types of plants. The innovative using of biotic indices in biodiversity studies also provides useful information on plant operating conditions and performance.
Źródło:
Environment Protection Engineering; 2018, 44, 1; 153-166
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancing SO2 removal efficiency by lime modified with sewage sludge in a novel integrated desulfurization process
Autorzy:
Qin, L.
Han, J.
Chen, W.
Liu, Z.
He, M.
Xing, F.
Powiązania:
https://bibliotekanauki.pl/articles/950037.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
steel industry
sintering process
osad ściekowy
przemysł hutniczy
proces spiekania
Opis:
In China, the sintering process annually emitted around 1.5 million t SO2, representing 70% of SO2 produced from the iron and steel industry. Lime based sorbent was modified with municipal sewage sludge (MSS) and the influence of the modification on the desulfurization efficiency was investigated in a laboratory-scale novel integrated desulfurization (NID) reactor. The properties of modified sorbent were characterized by the Brunauer–Emmett–Teller (BET) analyzer and X-ray fluorescence (XRD) analyzer. BET surface area was increased from 17.48 to 46.68 m2g–1. when the MSS/lime ratio increased from 0 to 0.08. Ca4Al8Si8O32, Ca1.5SiO3.5, Na2Si2O5 and CaSiO3 found in the modified lime benefited for the increase of the BET surface area and pore volume. The effects of sewage sludge/CaO weight ratio, calcination temperature and hydration time on the desulfurization efficiency were also studied. SO2 removal efficiency was increased from 88.7% to 97.3% after using the lime modified with sewage sludge.
Źródło:
Environment Protection Engineering; 2017, 43, 4; 17-27
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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