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Wyświetlanie 1-15 z 58
Tytuł:
Numerical modeling of batch formation in waste incineration plants
Autorzy:
Obroučka, K.
Vlček, J.
Moravcová, T.
Blahůšková, V.
Fojtík, P.
Powiązania:
https://bibliotekanauki.pl/articles/779159.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
waste incineration
waste to energy
waste storage in containers
waste storage in boxes
algorithm for batch formation
Opis:
The aim of this paper is a mathematical description of algorithm for controlled assembly of incinerated batch of waste. The basis for formation of batch is selected parameters of incinerated waste as its calorific value or content of pollutants or the combination of both. The numerical model will allow, based on selected criteria, to compile batch of wastes which continuously follows the previous batch, which is a prerequisite for optimized operation of incinerator. The model was prepared as for waste storage in containers, as well as for waste storage in continuously refilled boxes. The mathematical model was developed into the computer program and its functionality was verified either by practical measurements or by numerical simulations. The proposed model can be used in incinerators for hazardous and municipal waste.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 1; 1-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waste management of half-finished products and thermosetting wastes
Autorzy:
Leszczyński, S.
Brzychczyk, B.
Powiązania:
https://bibliotekanauki.pl/articles/778198.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odpady plastikowe
utylizacja odpadów
piroliza
plastic waste
thermosetting waste
pyrolysis utilization
Opis:
Plastics are the widely used materials and their application increases every year considerably. Therefore, appropriate waste management policy should be used in relation to the utilization or recycling of scrap plastic components. Although most of these materials refer to thermoplastics, a huge widening demand is observed in the field of thermosets. They find a wide range of applications as the dielectric or insulating materials, high-current breaker switches, sensors and other electrical and electronic devices, as well as high-resistant sleeves in mechanical devices. The substantial part of the thermohardening products is used in a car, heavy, light, chemical industry and agriculture as well. The thermohardening wastes contain a large amount of combustible fraction as thermosetting resins, and various materials as a different kind of metals group like ferromagnetic and copper. Therefore, they are potential sources of energy and secondary materials. Application of thermal methods for the utilization of these wastes in the pyrolysis process was investigated. The development of the utilization of these wastes with the possibility of gas and liquid substance recovery as a potential source of energy on a commercial scale is the main aim of this paper.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 122-126
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feasibility of municipal solid waste (MSW) as energy sources for Saudi Arabia’s future Reverse osmosis (RO) desalination plants
Autorzy:
Agboola, P. O.
Saleh, J.
Powiązania:
https://bibliotekanauki.pl/articles/779384.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
municipal solid waste
reverse osmosis
energy content
waste to energy
water
Opis:
The Kingdom of Saudi Arabia (KSA) generates between 1.4–1.75 kg/person/day of Municipal Solid Waste (MSW) that accounts for over 16 million tons of MSW/year. The solid waste collected from different sources is dumped in landfills, thereby creating environmental concerns. In this paper, the potential of solid waste as an energy source (Waste to Energy (WTE)) for Reverse Osmosis (RO) water purification was evaluated. The KSA is known for its acute fresh water shortages and uses desalination technology in meeting its daily water requirements; a process that is energy intensive. The evaluation of the energy content of MSW shows a potential to produce about 927 MW in 2015, based on a total mass burn, and about 1,692 MW in 2032. The MSW-WTE plants can produce about 1.5% of the targeted 120 GW of energy for 2032. For the R.O system, it will give approximately 16.8% of the daily fresh water needed for total mass burn and 2.4% with the recycling option.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 4; 82-89
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pilot Study of Generation and Disposal of Municipal Solid Wastes in Selected Household in Rural Areas in the South-Western Poland
Autorzy:
Strzelczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/778305.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
waste management
rural areas
Opis:
Pilot study of the composition of wastes was carried out in 15 rural family households engaged in agricultural activity. In the study group the average resident of rural areas generates about 166 kg of municipal wastes annually. The conducted studies showed that the composition of municipal wastes coming from rural households changes seasonally. During the periods of summer and autumn, the quantity of bio-wastes increased distinctly. The average mass of wastes transferred to the companies engaged in the collection of wastes in the analyzed rural households is almost 50 kg • M–1. year–1. The studies showed that over 80% of organic wastes (kitchen and garden) is utilized in the place where they are generated. In the studies, organic wastes were collected selectively (in separate bags), which undoubtedly had infiuence on their humidity (70–90%). Laboratory analysis of these wastes showed that the ratio C:N in it was from 7 to 19, whereas pH lay within the limits from 5.8 to 6.9 indicating its very good properties for the composting process. Therefore composting of organic waste from rural household should be recommended as the best way for its disposal and the weight reduction of biodegradable waste going to landfills. Comparison of the analyzed variants showed that some waste other than kitchen and garden does not leave the holding (it is re-used or burned in home hearths).
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 56-62
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorption of Cu2+ and Ni2+ ions from aqueous solutions using waste dried activated sludge biomass
Autorzy:
Aslan, S.
Yildiz, S.
Ozturk, M.
Powiązania:
https://bibliotekanauki.pl/articles/777992.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
adsorption
copper
nickel
waste biomass
Opis:
Adsorption of Cu(II) and Ni(II) ions onto the waste powdered activated sludge biomass (PWB), which was obtained from the biological wastewater treatment plant, was investigated in this experimental study. The effects of contact time, pH, temperature, initial sorbate and sorbent concentrations on the adsorption were determined. The BET surface area, pore volume, and pore diameter of PWB were found to be about 0.51 m2/g, 0.0053 cm3/g, and 41.4 nm, respectively. Considering the R2  value, qexp  and qcal , the Langmuir and Freundlich models were well described for Cu(II) and Ni(II) adsorption, respectively. The adsorption mechanism of Cu(II) and Ni(II) onto the PWB could be better simulated by the pseudo-second-order kinetic mechanism than the pseudo-first-order, intra particle diffusion and Elovich models. Thermodynamic aspects of the adsorption of heavy metals were also investigated. Considering the applied desorbing agents for reuse of PWB for Ni(II) recovery, desorption cycle is not feasible due to the deterioration of the PWB structure.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 20-28
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of pyrolysis process in processing of mixed food wastes
Autorzy:
Grycová, B.
Koutník, I.
Pryszcz, A.
Kaloč, M.
Powiązania:
https://bibliotekanauki.pl/articles/778553.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
pyrolysis
gas chromatography
food waste
Opis:
The food industry produces large amounts of solid and also liquid wastes. Different waste materials and their mixtures were pyrolysed in the laboratory pyrolysis unit to a final temperature of 800°C with a 10 minute delay at the final temperature. After the pyrolysis process of the selected wastes a mass balance of the resulting products, off-line analysis of the pyrolysis gas and evaluation of solid and liquid products were carried out. The highest concentration of methane, hydrogen and carbon monoxide were analyzed during the 4th gas sampling at a temperature of approx. 720–780°C. The concentration of hydrogen was measured in the range from 22 to 40 vol.%. The resulting iodine numbers of samples CHFO, DS, DSFW reach values that indicate the possibility of using them to produce the so-called “disposable sorbents” in wastewater treatment. The WC condensate can be directed to further processing and upgrading for energy use.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 1; 19-23
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Treatment of medical solid waste using an Air Flow controlled incinerator
Autorzy:
Trinh, Van Tuyen
Van, Huu Tap
Pham, Quang Huy
Trinh, Minh Viet
Bui, Ha Manh
Powiązania:
https://bibliotekanauki.pl/articles/779445.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Carbonization
hazardous solid waste
incinerator
Opis:
In this study, air flow controlled incinerator (AFCI) was used to treat medical solid waste in Vietnam. The experiment was conducted with solid waste samples that was weighed approximately 2.1–3.3 kg/h and had moisture content of 2.8–11.7%. The results showed that an increase in the air flow rate during the drying process accelerated the combustion time by 10–20%, and the optimal air low rate was 1.1 m/s. The combustion time varied from 0–45 min. The highest temperatures recorded in the drying chamber, carbonisation chamber and combustion chamber after 25–35 min of operation were varied from 195o C, 775o C and 1275o C, respectively. The temperature of the stack was from 33–68o C after the treatment by the wet scrubber using 20% NaOH solution. The combustion capacity was 77.3–87.5%. The experimental results revealed the AFCI process advantages including low operation cost and suitability for treating hazardous waste on a small scale.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 1; 29-34
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A model of the meat waste management
Autorzy:
Kowalski, Z.
Krupa-Żuczek, K.
Powiązania:
https://bibliotekanauki.pl/articles/778691.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odpady mięsne
czystsza produkcja
zarządzanie odpadami
meat waste
cleaner production
waste management
model solution
Opis:
The European Union produces about 18 million tons of waste from meat industry per year. The real danger of the BSE disease caused a necessity of looking for a new alternative solution of meat waste management. The proposed solution of meat industry waste management would create meat production waste free with the use of the cleaner production method. Cleaner production includes: pollution prevention, reduction of the source, recovery of materials and energy (for example: the recovery of blood plasma and protein hydrolisate from bone sludge) and their recycling. The thermal processing of meat industrial waste (bone sludge, meat-bone meal and odour) is anticipated, too. Ashes from meat calcining have the phosphorus content close to its concentration, of the typical phosphoric raw materials. That confirmed the possibility of using such ashes as the substitute of phosphoric raw materials. The target model of waste free meat waste management included the results of the implemented and current research.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 91-97
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of process parameters on combustion of plastic waste in the fluidized bed reactor
Autorzy:
Jankowski, D.
Żukowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/778547.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
plastics
fluidization
combustion
thermal decomposition
polymers
fluidized bed reactor
municipal waste
waste utilization
fluidized bed
Opis:
The paper presents the results of a research on the effects of process parameters on the combustion of waste plastics. The experiments were carried out in a laboratory fluidized bed reactor. The temperature and the conditions of the process were changed during the experiments. The plastics were combusted continuously (autothermally), periodically with extra fuel (co-firing) and alone in a hot fluidized bed. During the combustion process of materials containing nitrogen (PA, ABS), while the bed temperature decrease, changes of emissions of nitrogen oxides, in particular an increase in the concentration of N2O, up to 250 ppm at ~730°C, were observed. During ABS combustion, emission of HCN was registered, at a maximum of 400 ppm. The presence of the supporting fuel (LPG) resulted in the stabilization and acceleration of the plastic samples degradation process. The rate of thermal decomposition of waste materials depended on its elemental composition and also the physicochemical properties.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 75-79
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recycling of Cerium and Lanthanum from Glass Polishing Sludge
Autorzy:
Lee, Chi-En Hung
Lo, Yu-Chien
Sandagdorj, Nyamdorj
Gankhuyag, Enkhsaikhan
Popuri, Srinivasa Rao
Hung, Chi-En
Powiązania:
https://bibliotekanauki.pl/articles/779586.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Cerium
Lanthanum
Waste
Sludge
Leaching
Recycling
Opis:
To examine the efficiency of La and Ce recycling processes from the sludge, two major methods were used, namely leaching and precipitation. The findings suggest that 12% of La and 24.2% of Ce were contained in the sludge. The sludge was leached in an optimum condition of 6N HCl at a temperature of 70°C with a 3g/50 mL solid/liquid ratio for 3 h to obtain a 100% leaching recovery of La and Ce. After pH adjustment of the obtained La and Ce optimum leaching solution to 6 with NH4OH and a simultaneous addition of H2O2 in a ratio of 1:1, Ce precipitated out with 65.9% recovery. On the other hand, La was not precipitated. The results obtained in this study reveal that leaching and pH adjustment method could be used to recover the valuable REE of La and Ce from glass polishing sludge in order to reach the goals of resource recycling.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 4; 26-30
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Processing of sodium sulphate solutions using the EED method: from a batch toward a continuous process
Autorzy:
Pisarska, B.
Mikołajczak, W.
Jaroszek, H.
Nowak, M.
Dylewski, R.
Cichy, B.
Powiązania:
https://bibliotekanauki.pl/articles/779620.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
electro-electrodialysis
waste processing
process conditions
Opis:
In a batch electro-electrodialysis (EED), sodium sulphate solution with an initial concentration of 80.90 g/dm3  was converted to obtain solutions of sodium hydroxide (13.96%) and sulphuric acid (10.15%) and a dialysate (3.23 g/dm3 of sulphate ions). Changes in the EED process′ performance (temperature, cell voltage, concentrations, energy consumption) with an increasing conversion degree of salt are presented. Based on the presented results of the batch experiment, conditions necessary to run the process continuously are discussed. A single pass method is inapplicable due to excessive heating of the electro-electrodialyser. A cascade method enables interstage cooling of the solutions, providing temperatures suitable for ion-exchange membranes to work. Increasing the number of stages in the cascade reduces both the number of electro-electrodialysers and specific electric energy consumption, providing the same production capacity. However, this increases the investment cost.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 1; 54-58
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of waters environment hazard by pulp-mill liquors
Autorzy:
Lewkiewicz-Małysa, A.
Konopka, E.
Powiązania:
https://bibliotekanauki.pl/articles/779476.pdf
Data publikacji:
2008
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odpady z celulozowni
samooczyszczanie wody
chemical paper-pulp waste
pulp-mill waste
BAT
self-cleaning of waters
Opis:
Pulp-mill waste is very noxious for the primary wood production. The problems of its manageability are correlated with its volume and a considerable degree of pollutions, mainly the organic ones, coming from wood processing. The other main components of waste material are aggressive reagents liberating the cellulose fibers, during washing, classification and the benediction processes. The results of environmental studies covering the superficial water of the pulp-mill impact were presented. The production process factors were assessed owing to the waste concentration and distribution in the water race.
Źródło:
Polish Journal of Chemical Technology; 2008, 10, 4; 15-19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The utilization possibility of waste lignite as a raw material in the process of obtaining humic acids preparations
Autorzy:
Hoffmann, K.
Huculak-Mączka, M.
Powiązania:
https://bibliotekanauki.pl/articles/778997.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
brown coals
humic acids
extraction
alkaline waste
Opis:
In the light of environmental law utilization lignite waste in non-energy sectors of the economy is a national way to manage them. Lignite due to the lower degree of coalifi cation and calorifi c value as well as a high content of humic substances becomes a valuable component of fertilizer. The paper presents the possibility of using lignite waste as a raw material in the process of obtaining humic acids with 0.1 M NaOH. The idea of the process combines production, environmental and economic purposes. After the extraction process of humic acids and considering the possibility of using waste formed during the process, were carried out a number of studies to assist in choosing the best solution to its management.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 4; 1-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on Thermal Degradation Behavior of Siliceous Agriculture Waste (Rice Husk, Wheat Husk and Bagasse)
Autorzy:
Javed, S. H.
Aslam, U.
Mohsin, M.
Masooma, M.
Riaz, S.
Munir, Z.
Powiązania:
https://bibliotekanauki.pl/articles/778873.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Siliceous agriculture waste
Thermogravimetric Analyzer
amorphous silica
Opis:
Various siliceous agriculture waste (SAW) such as rice husk, wheat husk and bagasse have been investigated to study their thermal degradation behavior using Thermogravimetric Analyzer (TGA) technique. The focus of this research is to conduct TGA of raw and acid treated (20% HCl & 1M H2SO4) SAW at heating rate 10°C/min in the atmosphere of nitrogen. The results were analyzed on the basis of thermograms and it was inferred that 24 hours soaking with 20% HCl prior to thermal degradation enhanced the percent weight loss. The process also improved the percentage of residual weight of SAW indicating the extraction of amorphous silica with increased purity. The effect of acid treatment was verified by determining chemical composition of SAW samples before and after soaking with 20% HCl. Proximate analysis, thermal degradation temperature ranges and percentage of residual weight at 800°C for each of rice husk, wheat husk and bagasse were also quantified to observe the thermal degradation behavior. XRF analysis was performed to observe the effect of acid treatment for extraction of pure silica.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 3; 47-51
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water demineralization by membrane distillation utilizing cooling water from municipal waste incinerator
Autorzy:
Gryta, M.
Powiązania:
https://bibliotekanauki.pl/articles/779741.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
demineralized water
membrane distillation
scaling
waste incinerator
Opis:
The membrane distillation performance was studied for production of demineralized water from surface water (river). Hot water from cooling water system of municipal waste incinerator was considered as an energy source for membrane distillation. The integration of membrane installation with such cooling water system allows to re-use up to 18 kW per 1 m2  of the membranes. The studies were performed with the application of polypropylene capillary membranes Accurel PP S6/2. The membrane modules were supplied with the feed heated to a temperature of 310 K and 330 K. The permeate flux obtained for these temperatures was 2.8 and 9.7 L/m2  h, and the distillate conductivity was 6 and 4 S/cm, respectively. The water demineralisation process was carried out for 1200 h without module cleaning. The behaviour of the permeate flux and distillate conductivity indicate that used membranes maintained their non-wettability over tested period. The performed SEM-EDS examinations confirmed, that the deposits did not fill the pores and were mainly formed on the membrane surface. The scaling intensity was definitely smaller for lower temperature (310 K) of the feed. The amorphous deposits containing beside Ca also substantial amounts of the Si were mainly formed under these conditions, whereas at higher feed temperature dominated CaCO3  scaling.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 65-74
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 58

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