Temat: solids - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Changes in the Quality of Domestic Sewage Caused by the Reduction of Water Consumption in Households
Autorzy:: Chudzicki, Jarosław
Umiejewska, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/123072.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water consumption
saving water
municipal wastewater
total suspended solids
Opis:: Since the 1990s, there have been trends in Central and Eastern European countries to reduce water consumption. This phenomenon is closely related to the political, social and economic changes in these countries and the introduction of economic instruments in water management. The article presents the changes in water consumption in households in the years 1950–2019 depending on the degree of equipping buildings with sanitary facilities, and the structure of water consumption for particular purposes. For the same period, the quality of sewage generated in households is presented on the basis of bibliography. The content of total suspended solids was the main analysed parameter. The last part of the article presents the quality of wastewater discharged to fourteen Polish wastewater treatment plants. The majority of the analysed plants show an increase in the concentration of total suspended solids in the domestic sewage discharged to them. This phenomenon may be influenced by the decreasing water consumption in households.
Źródło:: Journal of Ecological Engineering; 2020, 21, 3; 41-50
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Treatment of Hospital Wastewater Using Activated Sludge with Extended Aeration
Autorzy:: Custodio, María
Cuadrado-Campó, Walter
Peñaloza, Richard
Vicuña-Orihuela, Carmela
Torres-Gutiérrez, Elmer
Orellana, Edith
Powiązania:: https://bibliotekanauki.pl/articles/2202195.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: suspended solids
bacterial load
activated sludge
removal efficiency
hospital wastewater
Opis:: Hospital wastewater is of a complex nature and is generally discharged into urban sewage systems. This study evaluated the removal efficiency of organic and biological contaminants from a hospital wastewater treatment plant using extended aeration activated sludge. The study was conducted at a treatment plant scale, with 14 hours of feed. The plant consists of a pre-filter, a collector and crumbler tank, a homogenization tank, two biological reactors of 80 000 liters capacity each, two settlers and a contact disinfection chamber. Three flow rates of 3 L/s, 4 L/s and 5 L/s were tested in each biological reactor, with application of three concentrations of residual chlorine with sodium hypochlorite to the effluent of the settling tanks (0.3 ppm, 0.4 ppm and 0.5 ppm). The removal efficiency of suspended solids varied according to flow rate. The reactor with a flow rate of 3 L/s and 0.5 ppm of residual chlorine achieved the highest removal of suspended solids (91.95%), biological oxygen demand (97.52%) and fecal coliforms (99.99%). Finally, the quality of the hospital wastewater is within the limits of the national and international environmental quality thresholds.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 24--32
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Preliminary Studies of the Water Quality in the Reservoir Wielkopolska at Different Times of Operation on the Basis of Selected Indicators
Autorzy:: Walczak, Natalia
Walczak, Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/1839125.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water quality
reservoir
nitrogen
phosphorus
BOD5
total suspended solids
Opis:: For the purposes of research and this resultant publication, the water quality was tested in three reservoirs differing in operating times. It was assumed that the study period covering autumn, spring and early summer was the period with the most visible changes in the concentrations of pollutants. The samples taken from the reservoirs were analysed by determining biological oxygen demand (BOD5), ammonia concentration (NH4), phosphate concentration (PO4) and total suspended solids. The use of indicators allowed for assessing the quality of water in these reservoirs and comparing it in terms of different periods of their operation. It was also observed that the water flowing into the Roszków and Jeżewo reservoirs (two oldest reservoirs) was of worse quality than the outgoing water. In the case of the newest reservoir, the water quality at the outflow deteriorated in relation to all indicators.
Źródło:: Journal of Ecological Engineering; 2021, 22, 2; 77-85
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Predicting Water Quality Parameters in a Complex River System
Autorzy:: Kurniawan, Isman
Hayder, Gasim
Mustafa, Hauwa Mohammed
Powiązania:: https://bibliotekanauki.pl/articles/1839534.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: machine learning
water quality parameters
turbidity
suspended solids
Kelantan river
Opis:: This research applied a machine learning technique for predicting the water quality parameters of Kelantan River using the historical data collected from various stations. Support Vector Machine (SVM) was used to develop the prediction model. Six water quality parameters (dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and suspended solids (SS)) were predicted. The dataset was obtained from the measurement of 14 stations of Kelantan River from September 2005 to December 2017 with a total sample of 148 monthly data. We defined 3 schemes of prediction to investigate the contribution of the attribute number and the model performance. The outcome of the study demonstrated that the prediction of the suspended solid parameter gave the best performance, which was indicated by the highest values of the R2 score. Meanwhile, the prediction of the COD parameter gave the lowest score of R2 score, indicating the difficulty of the dataset to be modelled by SVM. The analysis of the contribution of attribute number shows that the prediction of the four parameters (DO, BOD, NH3-N, and SS) is directly proportional to the performance of the model. Similarly, the best prediction of the pH parameter is obtained from the utilization of the least number of attributes found in scheme 1.
Źródło:: Journal of Ecological Engineering; 2021, 22, 1; 250-257
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Analysis and Simulation Performance of a Reverse Osmosis Plant in the Al-Maqal Port
Autorzy:: Yousif, Yasameen T.
Abbas, Abdulhussain A.
Yaseen, Dina Ali
Powiązania:: https://bibliotekanauki.pl/articles/2086424.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: reverse osmosis
Iraq
Basrah
Shatt Al-Arab
TDS
total dissolved solids
Winflows
Opis:: The Basrah province (southern of Iraq) was interested in establishing desalination plants to provide drinking water due to the high levels of salinity in its water resources. This work was carried out in order to evaluate and simulate the functionality of the reverse osmosis plant in the Al-Maqal port. From the field and laboratory measurement, this study concluded that the considered parameters of product water by reverse osmosis (RO) plant were within the Iraqi standard (IRS) limits. The calculation of operation indices showed that the recovery rate of plant (72%) and the permeate flux of plant (20 lmh) was within for limitation of brackish surface water. In turn, the plant has a low salt rejection (90.1%) and a high pressure drop (5 bar); therefore, the membranes require backwashing or chemical cleaning. Then, the performance of RO membrane was simulated by the Winflows software. The best operating parameters were identified. The coefficient of determination (R2) between simulated and measured TDS was 0.83. Therefore, the simulated TDS of permeate multiplied by 5.3 was given a good estimation for actual TDS within acceptable an error rate of 17%.
Źródło:: Journal of Ecological Engineering; 2022, 23, 5; 173--186
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Optimizing the Reduction of Total Suspended Solids in Pump Water from Fish Factories Through Electrocoagulation using Response Surface Methodology
Autorzy:: Aguilar-Ascón, Edwar
Neyra-Ascón, Walter
Albrecht-Ruiz, Miguel
Ibarra-Basurto, Alonso
Powiązania:: https://bibliotekanauki.pl/articles/1838313.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: total suspended solids
TSS
electrocoagulation
fish meal
fish pumping water
response surface methodology
optimization
Opis:: This study aims to optimize the removal of total suspended solids (TSS) in pump water from fish flour factories through electrocoagulation technology and to determine the effects of the main operation parameters. Pump water has high conductivity (40.1 mS), due to the presence of dissolved salts and contains high concentration of organic substances (12,360 mg/L of TSS and 520 mg/L of fats). In this study, pump water was treated in an electrocoagulation reactor with aluminum electrodes using Response Surface Methodology with a 3k factorial design based on two factors, current intensity (I) of 8-13 A and treatment time (t) of 20-40 minutes. The percentage of TSS removed from the water was used as the response variable. The results revealed that I and t significantly (p < 0.05) influenced the process. In accordance, the optimal operational parameters for TSS removal were I = 13 A and t = 30 minutes. Using these conditions, TSS removal efficiency of 99.9% was achieved. The sewage sludge generated with these optimal process conditions indicated 19.3% of ash content, 6.2% of salt, 1.7% of aluminum, 0.3% of iron, 0.4% of potassium, 256 ppm of zinc, and 2.1% of phosphorus. Hence, the results of this study affirm that electrocoagulation can be considered as a solution for marine pollution caused by fishing industries.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 269-277
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Optimizing the Reduction of Total Suspended Solids in Pump Water from Fish Factories Through Electrocoagulation using Response Surface Methodology
Autorzy:: Aguilar-Ascón, Edwar
Neyra-Ascón, Walter
Albrecht-Ruiz, Miguel
Ibarra-Basurto, Alonso
Powiązania:: https://bibliotekanauki.pl/articles/1838335.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: total suspended solids
TSS
electrocoagulation
fish meal
fish pumping water
response surface methodology
optimization
Opis:: This study aims to optimize the removal of total suspended solids (TSS) in pump water from fish flour factories through electrocoagulation technology and to determine the effects of the main operation parameters. Pump water has high conductivity (40.1 mS), due to the presence of dissolved salts and contains high concentration of organic substances (12,360 mg/L of TSS and 520 mg/L of fats). In this study, pump water was treated in an electrocoagulation reactor with aluminum electrodes using Response Surface Methodology with a 3k factorial design based on two factors, current intensity (I) of 8-13 A and treatment time (t) of 20-40 minutes. The percentage of TSS removed from the water was used as the response variable. The results revealed that I and t significantly (p < 0.05) influenced the process. In accordance, the optimal operational parameters for TSS removal were I = 13 A and t = 30 minutes. Using these conditions, TSS removal efficiency of 99.9% was achieved. The sewage sludge generated with these optimal process conditions indicated 19.3% of ash content, 6.2% of salt, 1.7% of aluminum, 0.3% of iron, 0.4% of potassium, 256 ppm of zinc, and 2.1% of phosphorus. Hence, the results of this study affirm that electrocoagulation can be considered as a solution for marine pollution caused by fishing industries.
Źródło:: Journal of Ecological Engineering; 2021, 22, 6; 269-277
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Annual Variation in the Performance of Settat Wastewater Stabilization Ponds Located in Settat City, Morocco
Autorzy:: Dyaa, Abou-Tammame
Jihane, Fathi
Abdelhamid, Bouzidi
Powiązania:: https://bibliotekanauki.pl/articles/1955490.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater
natural lagoon
biochemical oxygen demand
chemical oxygen demand
suspended solids
sewage treatment
wastewater reuse
agriculture
Opis:: The wastewater treatment plant of Settat city uses the natural lagooning technology, which requires low maintenance cost and little technical expertise. The purpose of this study was to evaluate the stability of plant performance during two years of operation (2019 and 2020), as well as the safety of its treated wastewater for reuse in agricultural irrigation. The results of this study show that the biochemical oxygen demand (BOD5), chemical oxygen demand (COD) and suspended solids (SS) did not exceed the Moroccan standards for discharge. They also show a good stable pollutant load reduction with a mean of 86.44%, 86.89% and 74.61%, for BOD5, COD and SS, respectively. On the other hand, microbiological characterization classifies the treated wastewater as "B" quality water, because the fecal coliform numbers exceed the requirement for "A" quality (1000 CFU/100 ml).
Źródło:: Journal of Ecological Engineering; 2021, 22, 8; 153-164
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Efektywność pracy oczyszczalni ścieków w Kołaczycach
Operational efficiency of wastewater treatment plant in Kolaczyce
Autorzy:: Chmielowski, K.
Młyńska, A.
Młyński, D.
Powiązania:: https://bibliotekanauki.pl/articles/400312.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: oczyszczalnia ścieków
BZT5
ChZTCr
zawiesina ogólna
wastewater treatment plant
BOD5
CODCr
total suspended solids
Opis:: W artykule dokonano analizy efektywności pracy oczyszczalni ścieków w Kołaczycach na podstawie wyników badań fizykochemicznych ścieków surowych oraz ścieków oczyszczonych w latach 2010 – 2014. Przeanalizowano zmiany wartości trzech wskaźników zanieczyszczeń – BZT₅, ChZTCr i zawiesiny ogólnej. Wyniki badań wskazują na to, iż oczyszczalnia funkcjonuje w sposób prawidłowy. Średnia wartość BZT₅ w ściekach oczyszczonych wyniosła 10,9 mg O₂ dm^-3, ChZTCr – 71,0 mg O₂ dm^-3, zawiesiny ogólnej – 15,0 mgdm^-3, a zatem wielkości te były mniejsze od dopuszczalnych wartości w ściekach odprowadzanych do odbiornika, które reguluje Rozporządzenie Ministra Środowiska z 2014 roku. O zadowalającej efektywności pracy obiektu świadczy również wysoka procentowa średnia redukcja każdego ze wskaźników zanieczyszczeń (dla BZT5 – 97,8%, dla ChZTCr – 93,7%, dla zawiesiny ogólnej – 97,6%), a także wartości współczynników niezawodności oczyszczalni (WNBZT5= 0,44, WNChZTCr= 0,57, WNzaw.og.= 0,43).
In the article the analysis of operational efficiency Wastewater Treatment Plant in Kolaczyce was performed based on the physico-chemical research results of raw sewage and treated sewage between 2010 and 2014. The analysis of values changing of three pollutants indicators – BOD5, CODCr and total suspended solids was performed. Research results indicate that treatment plant works properly. Average value of BOD5 in treated sewage was 10.9 mg O₂ dm^-3, CODCr – 71.0 mg O₂ dm^-3, total suspended solids – 15.0 mg dm^-3 so these values were lower than permissible pollutants content in sewage discharged to the collector which is determined by the Polish Ministry of Environmental Regulation of 2014. On satisfactory operational efficiency treatment plant indicates also high percentage reduction of each pollutants indicators (for BOD5 – 97.8%, for ChZTCr – 93.7%, for total suspended solids – 97.6%) and treatment plant reliability factors (WNBZT5= 0.44, WNChZTCr= 0.57, WNzaw.og.= 0.43).
Źródło:: Inżynieria Ekologiczna; 2015, 45; 44-50
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Experimental Study of Produced Water Treatment Using Activated Carbon with Aluminum Oxide Nanoparticles, Nanofiltration and Reverse Osmosis Membranes
Autorzy:: Hussein, Mudhaffar Yacoub
Al-Naemi, Amer Naji Ahmed
AlJaberi, Forat Yasir
Powiązania:: https://bibliotekanauki.pl/articles/24201776.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: produced water
wastewater treatment
nanofiltration membrane
reverse osmosis membrane
TOC removal
total organic compound
TDS removal
total dissolved solids
reuse
Opis:: This work inspected the produced water discharged from the Amara oil field in (Misan-Iraq) to improve the quality of water before reuse and reinjection or disposal. The process of treatment included a pretreatment step using activated carbon and post-treatment using flat polymeric nanofiltration membrane (NF) (1.0 nm) and reverse osmosis membrane (RO) (0.3 nm), respectively. Therefore, activated carbon without aluminum oxide (Al2O3) nanoparticles and with (Al2O3) nanoparticles (20 nm) was used to examine the removal efficiency of the total organic compound (TOC). The height of the fixed bed of activated carbon and its diameter were 35 cm and 2.5 cm, respectively. The volumetric flow rates of the produced water flowing through the activated carbon column were taken as (25, 20, 15, 10 and 5)×10-4 m3/h respectively, at transmembrane pressure (TMP) of 1.0 bar, pH equals 6, and the temperature of 25 °C. The TOC removal efficiencies attained using activated carbon without Al2O3 nanoparticles were (52, 64, 77, 83 and 87%), respectively, and (65, 72.7, 83.4, 92.5 and 95.2%) with the use of Al2O3 nanoparticles, respectively. Produced water effluent from the activated carbon column was treated by flat NF and RO membranes to reduce the total dissolved solids (TDS). The cross-flow rates through NF and RO membranes were 0.1 and 0.25 m3/h, TMP (1–12 bar) and 60 bar, respectively. The removal efficiency of TDS was enhanced up to 40% and 99.67%, respectively. In addition, the TOC removal efficiency was 100% in the effluent of the RO membrane.
Źródło:: Journal of Ecological Engineering; 2023, 24, 5; 78--87
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "solids" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język