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1

Digital Shape and Geometric Dimension Analysis of Polymer Fuel Tanks

Józwik J., Dziedzic K.

Advances in Science and Technology. Research Journal

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2021

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Vol. 15, no 4

38--48

EN

3D optical scanning method, is employed to digital shape and geometric dimension analysis of fuel tanks. The following paper presents the application possibilities of the optical 3D measurement method for measuring and archiving dimensions of geometrically complex parts, on the example of a passenger car fuel tank in local company. Based on the conducted measurements, for a specific type and size of the population of fuel tanks, proposed model that classifies the geometric accuracy of the tanks produced in the production line. For the analysis and data processing different informatics techniques have been used. The main objective of theirs was to identify the possibility of implementing the system for automation of the measurement to the production line. The measurements were implementation at local company - a manufacturer of polymer tanks in the automotive industry. For most of the measuring points, the mean value of the measuring deviations ranged from -1 mm to +1 mm. The mean values of the standard deviations are presented for a representative deviation of the X dimension of 0.1; 5; 10; 15 and 20 mm were respectively: 0.014; 0.150; 0.172; 0.289; 0.340 mm. The dimensional shape assessment of the manufactured tanks is extremely important from the point of view of the automation of this task in the production line. The optimization of the measurement of tanks carried out in laboratory conditions was implemented on the production line. The main task of optical scanning for the assessment of dimensional conformity has not been used so far in factory. This is due not only to the cost of such systems, but also to certain limitations that have been resolved thanks to laboratory tests. The obtained results of the metrological inspection make it possible to identify significant dimensional and shape deviations of automatically manufactured tanks. The proposed use of artificial neural networks allows the production with a high quality of tanks accuracy with the minimum the number of scanned tanks in the production line. The paper also presents the possibilities of the computer software to analyze the deviations of geometrically very complex parts.

2

Non integer order, discrete, state space model of heat transfer process using Grünwald-Letnikov operator

Oprzędkiewicz K., Dziedzic K., Więckowski Ł.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2019

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Vol. 67, nr 5

905--914

EN

The paper is intented to show a new, state space, discrete, non integer order model of a one-dimensional heat transfer process. The proposed model derives directly from time continuous, state space model and it uses the discrete Grünwald-Letnikov operator to express the fractional order difference with respect to time. Stability and spectrum decomposition for the proposed model are recalled, the accuracy and convergence are analyzed too. The convergence of the proposed model does not depend on parameters of heater and measuring sensors. The dimension of the model assuring stability and predefined rate of convergence and stability is estimated. Analytical results are confirmed by experiments.

3

Możliwości wykorzystania produktów ubocznych przemysłu zbożowo-młynarskiego

Dziedzic K., Różańska M., Mildner-Szkudlarz S., Górecka D., Hęś M.

Przemysł Spożywczy

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2018

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T. 72, nr 12

36--39

PL

Dążeniem producentów żywności jest produkcja bezodpadowa. Możliwości zagospodarowania produktów ubocznych są ściśle związane z rozwojem nauki oraz technologii. To, co jest produktem ubocznym dla jednego zakładu produkcyjnego, może stanowić podstawowy surowiec w kolejnym łańcuchu produkcyjnym. W ostatnich latach zaobserwowano wzrost wykorzystania ziarna zbóż, a w konsekwencji zwiększenie ilości powstających produktów ubocznych. Wysoka koncentracja składników odżywczych i bioaktywnych stwarza możliwości ich wykorzystania nie tylko do celów paszowych, ale również jako dodatki do żywności innowacyjnej. W pracy przedstawiono możliwości zagospodarowania produktów ubocznych przemysłu zbożowo-młynarskiego.

EN

Non-waste production is one of the main goals of food industry. The possibilities of utilizing by-products are closely related to the development of science and technology. The by-product of one production plant can be the basic raw material in the next production chain. In the recent years ithere was observed an increase of production of cereal grain based food, accompanied by generation of large amounts of various by-products. High concentration of nutrients and bioactive substances allows for using of these products not only for feed production, but also as additives for innovative or functional food. In this work authors showed possibilities to use of by-products obtained from cereal industry.

4

The Caputo vs. Caputo-Fabrizio operators in modeling of heat transfer process

Oprzędkiewicz K., Mitkowski W., Gawin E., Dziedzic K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2018

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Vol. 66, nr 4

501--507

EN

In the paper two non-integer order, state space models of heat transfer process are compared. The first uses a known Caputo operator and the second – a new operator proposed by Caputo and Fabrizio in 2015. Both discussed models are modifications of a known, integer order, state space, semigroup model of heat transfer process. Parameters of both models were identified by means of optimization of MSE cost function with the use of simplex method, available in MATLAB. Both proposed models have been compared in the aspect of accuracy and convergence. Analytical and numerical results show that the Caputo-Fabrizio model is faster convergent and easier to implement than the Caputo model. However, its accuracy in the sense of MSE cost function is worse.

5

Produkty zbożowe - źródło składników prozdrowotnych. Ocena spożycia

Górecka D., Hęś M., Stachecka A., Dziedzic K.

Przemysł Spożywczy

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2017

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T. 71, nr 1

30--33

PL

Celem pracy jest ocena spożycia wybranych bioaktywnych składników, tj. błonnika pokarmowego, przeciwutleniaczy i fitoestrogenów, na podstawie analizy spożycia produktów zbożowych. Przeciętne miesięczne spożycie omawianych składników prozdrowotnych obliczono na podstawie danych GUS oraz publikacji naukowych o spożyciu następujących produktów zbożowych: pieczywa, ryżu, makaronu, kasz i płatków zbożowych. Analiza spożycia bioaktywnych składników z przetworów zbożowych dotyczyła lat 2002-2012. Przeciętne miesięczne spożycie przeciwutleniaczy, fitoestrogenów i błonnika pokarmowego w 2012 r. (w porównaniu z 2002 r.) uległo znacznemu obniżeniu, odpowiednio o 31, 65 i 32%. Dlatego należy prowadzić działania edukacyjne wśród konsumentów w celu uzupełnienia wiedzy na temat spożycia produktów zbożowych.

EN

The aim of this study was to evaluate the consumption of the selected bioactive substances, i.e. dietary fiber, antioxidants and phytoestrogens on the basis of the analysis of the consumption of cereal products. The average monthly consumption of these healthy ingredients was calculated on the grounds of the GUS and scientific publications on the consumption of the following cereal products: bread, rice, pasta, groats and cereals. The analysis of the consumption of bioactive substances from cereals covered the period 2002-2012. The average monthly consumption of antioxidants, phytoestrogens and dietary fiber in 2012 was reduced, respectively by 31.65 and 32% as compared to 2002. Therefore, it is necessary to carry out the extensive educational activities among the consumers, leading to the increased consumption of cereal products.

6

Identyfikacja wad powłok napawanych regeneracyjnie z zastosowaniem tomografii rentgenowskiej

Paszeczko M., Józwik J., Dziedzic K., Bereżanśkyj T.

Przegląd Spawalnictwa

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2017

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R. 89, nr 12

12--16

7

Structure and construction assessment of the surface layer of hardfaced coating after friction

Dziedzic K., Pashechko M., Barszcz M., Józwik J.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 3

253--260

EN

The paper presents an analysis of the surface layer of Fe-Mn-C-B-Si-Ni-Cr alloy coating after friction with C45 steel. The coatings were obtained by arc welding (GMA). Flux-cored wires were used as a welding material. The flux-cored wires had a diameter of 2.4 mm. The tribological assessment was performed with the Amsler tribotester under dry friction conditions at unit pressures 10 MPa. The use of XPS spectroscopy allowed deep profile analysis of the surface layer. Based on the obtained results developed model of the surface layer for friction couple, hardfaced coating obtained from Fe-Mn-C-B-Si-Ni-Cr alloy – C45 steel. It was observed that the operational surface layer (OSL) of hardfaced coatings contained oxides (B2O3, SiO2, NiO, Cr2O3, FeO, Fe3O4, Fe2O3), carbides (Fe3C, Cr7C3) and borides (FeB, Fe2B).

8

Shearing strength test of orthopaedic titanium alloy screw produced in the process of 3D printing technology

Ruszniak P., Józwik J., Ostrowski D., Dziedzic K.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 1

128--137

EN

The aim of the present article is the assessment of technical shear resistance (technological shear) of orthopedic screw made of titanium alloy Ti6Al4V, produced using incremental technology in the process of 3D printing process. The first part of the work presents incremental techniques in production engineering. The second part of the present work contains a specification of the 3D printing process of samples as well as the description of the used material. The fundamental part of the article is composed out of endurance tests for orthopaedic screws as well as the analysis of the obtained results and conclusions. The method of incremental production SLM using SLM 280HL metal printer was used during the technological process. The resistance tests were performed using ZWICK/ROELL Z150 machines. Identical endurance trials were performed for monolithic bars made of titanium alloys (of bar core size ) made on a wire electric discharge machine Sodick SL600Q for comparative purposes. The obtained test results enabled comparative assessment of the value of shear resistance Rt in the conditions of technological shear. According to the performed tests, the shear resistance Rt of orthopaedic screws is nearly 33% lower than of monolithic bars of the same core size.

9

Assessment of the tribological properties of hardfacing welding alloy Fe-Mn-C-B-Si-Ni-Cr in dry friction conditions

Pashechko M., Dziedzic K., Dziubińska A, Barszcz M.

Tribologia

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2016

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nr 2

101--110

EN

The paper assesses the tribological properties of hardfacing coatings produced by gas metal arc welding. Flux-cored wires were used as a welding material. The core mixture was based on the Fe Mn-C-B-Si-Ni-Cr alloy. Seven types of flux-cored wires with different compositions were prepared. The flux-cored wires had a diameter of 2.4 mm. The tribological assessment was performer with an Amsler tribotester under dry friction conditions at different unit pressures: 3, 7, and 10 MPa. The results demonstrate that the coating L-6 has good tribological properties. The overlay weld had a hardness of 49 HRC. Following friction testing, the coatings were also examined with respect to their microhardness and microstructure.

PL

Praca przedstawia badania właściwości tribologicznych powłok otrzymanych metodą napawania łukowego w osłonie gazowej GMA. Jako materiał spawalniczy wykorzystano druty proszkowe (rdzeniowe). Mieszankę rdzeniową wykonano na podstawie stopu Fe-Mn-C-B-Si-Ni-Cr. Opracowano siedem rodzajów drutów proszkowych o różnych składach. Średnica drutów proszkowych wynosiła 2,4 mm. Badania tribologiczne przeprowadzono na tribotesterze Amslera w warunkach tarcia suchego przy różnych naciskach jednostkowych 3, 7 i 10 MPa. Wykazały one, że dobrymi właściwościami tribologicznymi cechowała się powłoka L-6 o twardości napoiny 49 HRC. Powłoki po tarciu poddano również badaniom mikrotwardości oraz mikrostrukturalnym.

10

Mikrotomograficzna identyfikacja wad powłok napawanych

Józwik J., Dziedzic K., Wierzba W.

Przegląd Spawalnictwa

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2016

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R. 88, nr 7

34--37

PL

W artykule przedstawiono wykorzystanie metody tomografii komputerowej CT (ang. Computed Tomography) do oceny powłok napawanych. Do otrzymania napoin wykorzystano metodę napawania elektrodą nietopliwą w osłonie gazowej TIG (ang. tungsten inert gas) z wykorzystaniem stopowych drutów do napawania powłok odpornych na zużycie o nazwach handlowych: EL-500 HB, EL-600 HB, EL-650 HB. Scharakteryzowano typowe wady wykonanych napoin oraz wpływ rodzaju drutu na koncentrację wad. Najmniejszy średni procentowy udział wad w stosunku do powierzchni całkowitej otrzymano dla napoiny EL- 600 HB, który wyniósł 1,5%.

EN

The paper presents the use of Computed Tomography (CT) for the evaluation of padding coatings. The method used to obtain a padding weld is pad welding with tungsten inert gas (TIG) using alloy wires for pad welding of wear resistant layers under the trade names: EL-500 HB, EL-600 HB, EL-650 HB. It characterizes the typical defects of obtained padding welds and the impact of the type of wire on the concentration of defects. The smallest average percentage of defects in relation to the overall surface is observed for the padding weld EL-600 HB, which amounts to 1.5%.

11

Flue gas cleaning in municipal Waste-to-Energy plants - Part 2

Jurczyk M., Mikus M., Dziedzic K.

Infrastruktura i Ekologia Terenów Wiejskich

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2016

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nr IV/2

1309--1321

EN

This article is a continuation of the first part of the article flue gas cleaning in municipal Waste-to-Energy plants - part I. The first part contains an extensive introduction to the subject of flue gas cleaning and cover subjects: reduction of dust and particle-bounded heavy metals as well as NOx reduction. The second part focuses on reduction of acid gases, organic pollutants and heavy metals. One chapter is devoted to examples of working plants: Spittelau (AT), Issy les Moulineaux (FR), Mainz (DE), Zabalgarbi (ES) where used technology and pollutants emissions are shown along with comparison to WTERT 2006 top ten plants and EU limits. Six new Polish Waste-to-Energy plants are shortly describe according to flue gas treatment methods. Some topics, as costs and residual handling, are only briefly mentioned and for more information the reader is advised to use literature which will allow them to learn more about technology, processes and problems presented in the text. The aim of the study is to present the current state of flue gas cleaning in Waste-to-Energy plants.

12

Flue gas cleaning in municipal waste-to-energy plants - Part 1

Jurczyk M., Mikus M., Dziedzic K.

Infrastruktura i Ekologia Terenów Wiejskich

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2016

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nr IV/1

1179--1193

EN

All plants based on combustion of the fuel generate a large number of flue gases, which contain variety of pollutants. These include particulates, heavy metals (Hg, Cd, Tl, As, Ni, Pb), carbon compounds (CO, hydrocarbons (VOCs), (PCDD / F, PCB), acid and other gases (HCl, HF, HBr, HI, SO2 , NOx , NH3 ), whose emissions are controlled, and subjected to the European and regional limits. In municipal waste-to-energy plants large diversity of fuel results in a considerable concentration of the individual compounds which can be dangerous for the environment. Due to these facts, it is necessary to take into account a flue gas cleaning stage in every waste-to-energy plant. The article divided into two parts shows technologies and processes that can be used at this stage. It describes methods used to deal with all kinds of pollutants at flue gases treatment stage. The paper presents emission limits imposed by the European Union with examples of emissions at working municipal waste-to-energy plants, and the limits that are to be expected in the future. Some topics, as costs and residual handling, are only briefly mentioned and for more information a reader is advised to use literature which will allow him to learn more about technology, processes and problems presented in the text. The aim of the study is to present the current state of flue gas cleaning in Waste-to-Energy plants.

13

Qualitative Research of AZ31 Magnesium Alloy Aircraft Brackets Produced by a New Forging Method

Dziubińska A., Gontarz A., Dziedzic K.

Archives of Metallurgy and Materials

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2016

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Vol. 61, iss. 2B

1003--1008

EN

The paper reports a selection of numerical and experimental results of a new closed-die forging method for producing AZ31 magnesium alloy aircraft brackets with one rib. The numerical modelling of the new forming process was performed by the finite element method.The distributions of stresses, strains, temperature and forces were examined. The numerical results confirmed that the forgings produced by the new forming method are correct. For this reason, the new forming process was verified experimentally. The experimental results showed good agreement with the numerical results. The produced forgings of AZ31 magnesium alloy aircraft brackets with one rib were then subjected to qualitative tests.

14

Impact of selected properties of raw material on quality features of granular fertilizers obtained from digestates and ash mixtures

Wróbel M., Frączek J., Jewiarz M., Mudryk K., Dziedzic K.

Agricultural Engineering

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2016

|

Vol. 20, No. 4

207--217

EN

The paper presents the results of research, the objective of which was to determine the impact of particle size distribution and density of digestates and ash on density and tensile strength of granular fertilizer obtained from mixtures of these substrates. Particle size distribution, absolute density, envelope density and porosity of substrates were determined. Granular fertilizers were made of clean substrates and their mixtures. Envelope density of the obtained granulates was within 0.81-1.88 g⋅cm-3. The determined compaction degree was within 3.65- 10.12. While, the compaction index IS of granulates made of mixtures was within 0.5-0.55 and was lower in comparison to IS of granulates from digestates (0.6) and ash (0.76).

PL

W pracy przedstawiono wyniki badań, których celem było określenie wpływu składu ziarnowego i gęstości substancji pofermentacyjnej oraz popiołu na gęstość i wytrzymałość granulatów nawozowych, uzyskanych z mieszanek tych substratów. Wyznaczono skład ziarnowy, gęstość bezwzględną, gęstość pozorną oraz porowatość substratów. Wykonano granulaty nawozowe z czystych substratów oraz z ich mieszanek. Gęstość pozorna uzyskanych granulatów zawierała się w przedziale 0,81-1,88 g⋅cm-3 . Wyznaczony stopień zagęszczenia zawierał się w przedziale 3,65-10,12. Natomiast wskaźnik zagęszczenia IS granulatów z mieszanek mieścił się w przedziale 0,5- 0,55 i był niższy w porównaniu do IS granulatów z substancji pofermentacyjnych (0,6) i popiołu (0,76).

15

Analysis of mechanical dewatering of digestate

Mudryk K., Frączek J., Jewiarz M., Wróbel M., Dziedzic K.

Agricultural Engineering

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2016

|

Vol. 20, No. 4

157--166

EN

Technology of processing of agricultural raw material and production residues from agri-food industry often requires their dewatering. Digestate is one of such materials i.e. the mass remaining after the bio-gasification process, which has great hydration (above 85%). The objective of the research was to know the impact of dewatering on the change of water content in digestate from biogas in Piekoszów. A mechanical dewatering process was carried out and reflected the conditions of operation of screw presses for dewatering of plant raw materials, whose screen internal diameter is 160 mm. Knowing the impact of pressure on the dynamics of raw material moisture decrease will allow modelling of the operation of industrial devices with similar operation parameters. Thus, a research on the dewatering process with the use of pressure within 0.58-2.91 MPa and slotted screens with meshes size of 0.1; 0.2 and 0.3 mm were carried out. The analysis of the obtained results indicates that an effective process of dewatering of the investigated digestate takes place at the working pressure to 1.74 MPa regardless the applied screen. Further increase of pressure does not cause a significant decrease of moisture in the investigated material.

PL

Technologie przetwarzania surowców rolniczych, jak i pozostałości produkcyjnych z przemysłu rolno-spożywczego wymagają często przeprowadzenia procesów ich odwadniania. Jednym z takich materiałów jest poferment tj. masa pozostała po procesie biogazyfikacji, która charakteryzuje się dużym uwodnieniem (powyżej 85%). Celem badań było poznanie wpływu ciśnienia odwadniania na zmianę zawartości wody w pofermencie z biogazowni w Piekoszowie. Proces mechanicznego odwadniania przeprowadzono odzwierciedlając warunki pracy pras ślimakowych do odwadniania surowców roślinnych, o średnicy wewnętrznej sita 160 mm. Poznanie wpływu ciśnienia na dynamikę spadku wilgotności surowca, pozwoli na modelowanie pracy urządzeń przemysłowych o podobnych parametrach pracy. W związku z tym przeprowadzono badania procesu odwadniania przy zastosowaniu ciśnienia w zakresie 0,58-2,91 MPa oraz sit szczelinowych o wielkości otworów 0,1; 0,2 oraz 0,3 mm. Przeprowadzona analiza uzyskanych wyników wskazuje, iż efektywny proces odwadniania badanego pofermentu zachodzi przy ciśnieniu roboczym do 1,74 MPa, niezależnie od zastosowanego sita. Dalszy wzrost ciśnienia nie powoduje istotnego spadku wilgotności w badanym materiale.

16

Analysis of impact of biomass added to RDFoversize fraction on properties of briquettes

Frączek J., Słomka-Polonis K., Mudryk K., Wróbel M., Dziedzic K.

Agricultural Engineering

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2016

|

Vol. 20, No. 4

39--50

EN

The impact of biomass addition to the RDF oversize fraction on quality parameters obtained from this blend of briquettes produced under semi-industrial conditions was analysed. For the purposes related to the experiment four RDF mixtures with fragmented biomass of common willow Salix viminalis L., differing only with percentage participation of base elements, were prepared. The briquetting process was performed with the use of a semi-industrial briquetting machine at the determined compaction pressure of 47 MPa and a diameter of a sleeve (and a briquette at the same time) of 50 mm. Selected quality parameters of produced briquettes were determined, i.e. density, mechanical strength DU and compression strength. The best parameters were obtained for briquettes produced from the blend with a 50% share of willow (ρ=843.9 kg·m-3, DU=86.1%, Rc=0.46 MPa). The lowest parameters were in case of briquettes without biomass addition. Statistical analysis of research results indicates that biomass additions to RDF significantly affect the improvement of quality parameters of the obtained briquettes.

PL

Przedstawiono analizę wpływu dodatku biomasy do frakcji nadsitowej RDF na parametry jakościowe uzyskanych z tej mieszanki brykietów, utworzonych w warunkach półprzemysłowych. Na potrzeby doświadczenia utworzono cztery mieszanki RDF wraz z rozdrobnioną biomasą wierzby wiciowej Salix viminalis L., różniące się udziałem procentowym składników bazowych. Proces brykietowania wykonano przy użyciu półprzemysłowej brykieciarki przy ustalonym ciśnieniu zagęszczania 47 MPa i średnicy tulei (a tym samym brykietu) 50 mm. Określono wybrane parametry jakościowe utworzonych brykietów tj.: gęstość właściwą, trwałości mechaniczną DU i wytrzymałość na ściskanie. Najlepsze parametry uzyskano dla brykietów wytworzonych z mieszanki z 50% udziałem wierzby (ρ=843,9 kg·m-3 , DU=86,1%, Rc=0,46 MPa). Najniższe parametry uzyskały brykiety bez dodatku biomasy. Analiza statystyczna wyników badań wskazuje, że dodatek biomasy do RDF’u istotnie wpływa na poprawę parametrów jakościowych uzyskanych brykietów.

17

Study of coatings obtained from alloy Fe-Mn-C-B-Si-Ni-Cr

Pashechko M., Dziedzic K., Barszcz M.

Advances in Science and Technology. Research Journal

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2016

|

Vol. 10, nr 31

194--198

EN

Tribological behaviour of coatings obtained from eutectic alloy Fe-Mn-C-B-Si-Ni-Cr was studied. The coatings were obtained by the method of gas metal arc welding (GMA) with use of powder wire. GMA welding method is widely used for the regeneration of machine parts. Eutectic Fe-Mn-C-B-Si-Ni-Cr alloys can be used to obtain high quality coatings resistant to wear and corrosion. Pin-on-disk dry sliding wear tests at sliding speeds 0.4 m/s and under load 10 MPa were conducted for pin specimens. During friction a typical tribological behavior was observed. The mechanism of wear was mechanical-chemical.

18

Research on tribological properties of dental composite materials

Dziedzic K., Zubrzycka-Wróbel J., Józwik J., Barszcz M., Siwak P., Chałas R.

Advances in Science and Technology. Research Journal

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2016

|

Vol. 10, nr 32

144--149

EN

Dental practice today used a lot of different materials. This paper evaluates tribological and mechanical properties of two dental materials CeramX and I-Light. Tribological analysisad of samples was conducted at temperature 37°C and in the environment of artificial saliva. The wear rate was evaluated with a ball-on-disc tribotester, in accordance to ASTM G-133 norm. The counterbodies were 6-mm-in-diameter Al2 O3 steel balls. The load of 2, 10 and 20 N was applied. The tests were conducted at 0.15 m/s sliding velocity over a sliding stroke of 1000 m. The changes in the value of the following parameters were measured during the trials: friction coefficient, friction force, temperature and wear depth. After completing the tribological tests the surface of samples was carried out.

19

Zastosowanie glukomannanu w produkcji żywności prozdrowotnej

Górecka D., Dziedzic K., Szafarz E., Szafarz M.

Przemysł Spożywczy

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2015

|

T. 69, nr 11

30--32

PL

Glukomannan konjac jest polisacharydem zaliczanym do rozpuszczalnej frakcji błonnika pokarmowego, otrzymywanym z bulwy rośliny Amorphophallus konjac K. Koch. W artykule scharakteryzowano preparat oraz przedstawiono możliwość jego zastosowania w ciastkach kruchych, batonikach owocowych i „papirusie owocowym”. Ocena sensoryczna wyrobów z glukomannanem wykazała możliwość jego zastosowania w produkcji tego rodzaju żywności.

EN

Konjac glucomannan is polysaccharide classified as a soluble dietary fiber fraction and is obtained from the root of the plant Amorphophallus konjac K. Koch. The article describes glucomannan and presents the possibility of using in products such as: cookies, fruit bars and “fruit parchment. Sensory evaluation of products with the glucomannan has demonstrated the possibility of its use in food production.

20

Impact Of Aerobic Biostabilisation And Biodrying Process Of Municipal Solid Waste On Minimisation Of Waste Deposited In Landfills

Dziedzic K., Łapczyńska-Kordon B., Malinowski M., Sikora J., Niemiec M.

Chemical and Process Engineering

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2015

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Vol. 36, nr 4

381--394

EN

The article discusses an innovative system used for aerobic biostabilisation and biological drying of solid municipal waste. A mechanical–biological process (MBT) of municipal solid waste (MSW) treatment were carried out and monitored in 5 bioreactors. A two-stage biological treatment process has been used in the investigation. In the first step an undersize fraction was subjected to the biological stabilisation for a period of 14 days as a result of which there was a decrease of loss on ignition, but not sufficient to fulfill the requirements of MBT technology. In the second stage of a biological treatment has been applied 7-days intensive bio-drying of MSW using sustained high temperatures in bioreactor. The article presents the results of the chemical composition analysis of the undersize fraction and waste after biological drying, and also the results of temperature changes, pH ratio, loss on ignition, moisture content, combustible and volatile matter content, heat of combustion and calorific value of wastes. The mass balance of the MBT of MSW with using the innovative aeration system showed that only 14.5% of waste need to be landfilled, 61.5% could be used for thermal treatment, and nearly 19% being lost in the process as CO2 and H2O.