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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:
Application of biological method for removing selected heavy metals from sewage sludge
Autorzy:
Willner, Joanna
Fornalczyk, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/109353.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
bioleaching
sewage sludge
copper
zinc
Acidithiobacillus
Opis:
The aim of the study was to evaluate the application of bioleaching technique to reduce content of selected heavy metals (Zn, Cu) in sewage sludge, and hence to indicate possibilities for metals recovery from this type of waste. Bioleaching experiments were carried out with mixed bacteria Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans, using leaching media: ferrous sulfate with different concentrations of Fe2+ (2 g/dm3 and 9 g/dm3) and sulfuric acid (VI). Dynamics of the increase in zinc concentration in biological systems was almost identical for both 9 g Fe2+/dm3 and 2 g Fe2+/dm3 in samples. However, higher values of Cu concentration were achieved using a medium with iron(II) salt 9 g/dm3 than in a 2 g/dm3 solution. Bioleaching with 9 g Fe2+/dm3 allowed for a nearly 20-fold reduction of zinc content and a 2-fold reduction in copper content in sewage sludge. Using 9 g/dm3 ferrous sulfate bioleaching could dissolve 94.8% Zn and 58.9%, whereas chemical leaching dissolved 47.3% Zn and 4.2% Cu.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 2; 387-395
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable development in the tinplate industry: refining tinplate leachate with cementation
Autorzy:
Klimko, Jakub
Urban, Kobialkova Ivana
Piroskova, Jana
Orac, Dusan
Havlik, Tomas
Klein, Dusan
Powiązania:
https://bibliotekanauki.pl/articles/1449632.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tin sludge
recycling
hydrometallurgy
cementation
electrolysis
Opis:
Tin sludge produced during tin electroplating of steel sheet is an interesting secondary source of tin. Dried sludge usually contains more than 50% tin. Hydrometallurgical sludge treatment consists of several steps, including leaching in hydrochloric acid and electrolytic recovery of tin. The electrowinning process is negatively affected by the presence of impurities such as antimony and bismuth, which can cut overall current efficiency to 11% as well as reducing the quality of recovered tin. It is appropriate therefore to remove these impurities from the leachate before the electrowinning steps. This work studies the refining of leachate using cementation. The experiments were carried out at temperatures of 20, 40 and 60 °C at solid to liquid ratios of 1:60, 2:60, 3:60 and 4:60 using tin and iron dust as cementing metals. The leachates were mixed at a constant rate of 400 rpm during all cementation experiments. Effective removal of impurities was achieved in the case of iron powder cementation at s/l ratio 2:60 and temperature 20 °C. This cementation removed 98.49% bismuth and 99.14% antimony from the leachate solution. Electrolysis efficiency was increased from 11 to 71% after leachate refining. Antimony and bismuth were not detected in the final product obtained from refined electrolyte by means of electrolysis.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 1; 219-227
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
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:
Thermogravimetric analysis of sewage sludge and straw co-firing
Autorzy:
Arora, Amit
Pawlak-Kruczek, Halina
Ostrycharczyk, Michał
Serafin-Tkaczuk, Monika
Kowal, Mateusz
Subramanian, Navaneethan
Madejski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/37220070.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hermogravimetric analysis
sewage sludge
straw
co-firing
Opis:
The main objective of this study is to perform thermogravimetric analysis on sewage sludge and straw co-firing at selected proportions. Sewage sludge is a residue from wastewater consisting of organic matter, toxic contaminants and heavy metals [1]. It is estimated that 10 million tonnes of sewage sludge are produced every year in European states, which represents 4.1% of all waste generated in the EU annually – about 250 million tonnes of dry solids [2]. Landfilling is deemed to be the most expensive way to dispose of sewage sludge, with average total costs ranging from EUR 260 to 350 per tonne of dry matter [3]. Straw is a major biomass solid waste from agriculture; it can be considered CO₂ neutral. The availability is wide in Europe that it is estimated to be 33 million metric tonnes [4]. A suite of thermogravimetric analysis and derivative thermogravimetric experiments was performed for this study, followed by the determination of the kinetic parameters and characteristic temperatures for these materials and their blends at different proportions. Through this analysis we can obtain information about the thermal behaviour, energy activation and ash content, and the decomposition of gaseous products can be identified the help of thermal decomposition [5].
Źródło:
Zeszyty Energetyczne; 2020, 7; 243-254
2658-0799
Pojawia się w:
Zeszyty Energetyczne
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:
Ultrasonic treatment and its applicability for the selective treatment of borax clayey waste sludge
Autorzy:
Gürsoy, Yaşar Hakan
Kurama, Haldun
Powiązania:
https://bibliotekanauki.pl/articles/1447005.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultrasonic treatment
boron waste water
separation
sludge treatment
Opis:
Sludge treatment is one of the most difficult challenges for many industrial plants. In recent years, the use of ultrasound power has received considerable attention as one of the increasing tool for managing of this problem. Power ultrasound enhances chemical and physical changes in a liquid medium through the generation and subsequent destruction of cavitations bubbles. Therefore, the increased friction and stress in solution resultant with cleaning of the solid surfaces and dispersion of bonded/aggregated solid particles. In this study, the basic fundamentals of ultrasonic treatment and process variables were briefly overviewed. The study was also extended with preliminary analyses performed to determine its ability on the extraction of major and trace elements from Kırka Borax Concentrator tailings mainly boron as boric acid and Li as Li reach pregnant solution (PLS). Prior and after the sonification tests, physical, chemical and morphological analyses were carried out to determine the treatment performance. It was found that sonication leads the liberation of boron minerals from sludge and with the help of temperature they are dissolved and re-crystallized on clay substrate during cooling stage. The extraction test performed with these crystals revealed that Li-rich solution (that can be further use as source of lithium carbonate or lithium hydroxide production), and boric acid could be produced with easy and low cost beneficiation method.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 5; 80-90
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
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:
Enhanced biosolubilization of mid-low grade phosphate rock by formation of microbial consortium biofilm from activated sludge
Autorzy:
Xiao, Chunqiao
Wu, Xiaoyan
Zhu, Lei
Yu, Tong
Xu, Zhenghe
Chi, Ruan
Powiązania:
https://bibliotekanauki.pl/articles/110353.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biosolubilization
phosphate rock (PR)
microbial consortium
activated sludge
biofilm
Opis:
Mid-low grade phosphate rock (PR) is a potential source of free phosphate to facilitate crop growth, but a cost effective and environmentally responsible extraction process is required. In this study, the capacity of a microbial consortium from activated sludge to solubilize PR in a laboratory-scale column reactor was investigated. The microbial consortium proved capable of efficiently releasing soluble phosphate in the reactor effluent over the 90-day trial. The microbial consortium grew well in the column system as evidenced by reduced chemical oxygen demand (COD) in the reaction solution. Biofilm formation was identified as critical for biosolubilization of the mid-low grade PR. Imaging of the biofilm by scanning electron microscopy (SEM) revealed a dense network of microbial cells embedded in extracellular polymeric substances (EPS). The biofilm contained both oxic and anoxic zones. The pH decreased significantly in both the biofilm and the reaction solution during operation, indicating healthy growth of the microbial consortium with corresponding acid generation and subsequent enhancement of phosphate solubilization.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 217-224
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
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
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