Temat: BOD - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effectiveness and Adaptability of Water Hyacinth (Eichornia Crassipes) Mart. Solm in its Role in Reducing COD and BOD Levels in Petroleum Liquid Waste
Autorzy:: Hardestyariki, Dwi
Fitria, Syarifa
Powiązania:: https://bibliotekanauki.pl/articles/2086418.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: COD
BOD
phytoremediation
Opis:: This study aimed to determine the effectiveness and ability of water hyacinth (Eichornia crassipes Mart. Solm) in reducing the COD and BOD levels in petroleum liquid waste. Petroleum liquid waste is one type of waste that pollutes the environment if it is not treated first. In this study, the biological treatment techniques were carried out using the phytoremediation techniques. Phytoremediation is an effort to reduce and improve the quality of waste by using plant agents so that the levels of pollutants contained in the waste can be reduced. The phytoremediation techniques are carried out using a simple bioreactor with various concentrations of petroleum liquid waste, namely control (0% waste), 10% waste, 20% waste, and 30% waste. The results of this study showed that the water hyacinth plant was able to tolerate liquid petroleum waste, which was indicated by the water hyacinth plant being able to survive up to a concentration of 30% for approximately 2 months. On the basis of the measurement of BOD and COD of petroleum liquid waste before phytoremediation was carried out, it was 20 mg/l and 10.04 mg/l, respectively. At 10% effluent concentration, the BOD and COD values decreased to 4.11 mg/l and 14.7 mg/l, respectively. At 20% effluent concentration, the BOD and COD values also showed a decrease to 3.73 mg/l and 9.14 mg/l, respectively. At 30% effluent concentration, the BOD and COD values showed a decrease to 3.73 mg/l and 1.22 mg/l, respectively. The ability of the water hyacinth plant to reduce the BOD and COD values can show its effectiveness to be used as a phytoremediation agent for petroleum waste.
Źródło:: Journal of Ecological Engineering; 2022, 23, 5; 26--29
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Advanced Oxidation Treatment of Composting Leachate of Food Solid Waste by Ozone-Hydrogen Peroxide
Autorzy:: Gliniak, Maciej
Lis, Anna
Polek, Daria
Wołosiewicz-Głąb, Marta
Powiązania:: https://bibliotekanauki.pl/articles/124275.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: BOD5
COD
oxidation
compost
leachate
Opis:: The research was conducted to investigate the efficiency and possibilities of advanced oxidation process based on ozone-hydrogen peroxide. The process was used as a post-treatment step of composting leachate utilisation. The leachate samples were collected from a typical composting plant with the aerobic biological treatment system. The samples were conditioned in a “ozone reactor” without dilution. The effectiveness of the treatment process was measured by pH values (4.0-7.0), H₂O₂ concentrations (0.5-4.0 g∙dm^-3), ozone doses (0.5-1.5 g∙h^-1) and reaction times (0-10 min). The highest removal efficiencies achieved were 85% and 92% for chemical oxygen demand (COD) and biochemical oxygen demand (BOD₅), respectively. The optimum process parameters occurred at pH 5.0, 2.0 g∙dm^-3 concentration of H₂O₂, and 0.75 g∙h^-1 of ozone dose. The optimal reaction time was 3 min. The O₃/ H₂O₂ advanced oxidation process was found to oxidize COD and BOD₅ of the composting leachate. The oxidation reaction can be used as a feasible technique for composting leachate treatment.
Źródło:: Journal of Ecological Engineering; 2019, 20, 5; 203-208
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Wastewater Pollutants Modeling Using Artificial Neural Networks
Autorzy:: Al Saleh, Hadeel Ali
Powiązania:: https://bibliotekanauki.pl/articles/1955438.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ANN
COD
BOD5
TSS
propagation algorithm
Opis:: In this study, the execution and assessment of the ANN approach towards the declaration of the pollution was used. The ANN-based models for prediction of Chemical and Biological Oxygen demands, (COD & BOD5) and Total Suspended Solids (TSS) concentrations in the effluent were formed using a three-layered feed forward back propagation algorithm ANN towards assessing the performance of a wastewater treatment plant (WWTP). Two types of configurations were used, MISO and MIMO. The study showed the superiority of MIMO according to the results of R and MSE, which were used as evaluation functions for the predicted models. The results also showed that the model built to predict the values of BOD5 concentrations demonstrate the best performance among the rest of the models by achieving the value of correlation coefficient up to 0.99. Among the input combinations tested in the study, the models the inputs of which did not contain BOD5 had the best performance, which demonstrates that the BOD5 has the largest influence on the values of R in the COD prediction models as well as other predicted models than TSS and other parameters; consequently, the performance of the WWTP was greatly affected. This study demonstrated the value of using artificial networks to represent the complex and non-linear relationship between raw influent and treated effluent water quality measurements.
Źródło:: Journal of Ecological Engineering; 2021, 22, 7; 35-45
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study on the Development of Household Wastewater Treatment Unit
Autorzy:: Ghawi, A. H.
Powiązania:: https://bibliotekanauki.pl/articles/125287.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: septic tank
bioreactor
wastewater
BOD
COD
households
Opis:: The cities of Iraq in general and the city of Al Diwaniyah in particular are characterized by the fact that the majority of households use septic tank to dispose of sewage, leading to contamination of ground and surface water and a disturbance to the environment. The objective of this study is to protect the water and soil sources from the risk of pollution, eliminate the process of perfusion and thus, reduce costs, maintain public health, as well as design and implement the proposed purification unit for domestic wastewater treatment. A domestic wastewater treatment unit has been improved to meet the standard specifications for the quality of the effluent wastewater. In this study, a compact non-electric sewage treatment unit was improved and implemented. Treatment is based on an effective modern biological purification process. Experimental verification and analysis of results were performed to demonstrate the improvement of physical and chemical parameters. The performance of the septic tanks-bioreactor gave satisfactory results. The removal efficiencies of Total Biochemical Oxygen Demand (BOD), Total Chemical Oxygen Demand (COD), NH4-N, Total Nitrogen and Total Suspended Solid (TSS) were 96.9%, 84.6%, 78.8%, 79.9% and 95.3%, respectively.
Źródło:: Journal of Ecological Engineering; 2018, 19, 2; 63-71
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Treatment of Medical Wastewater by Moving Bed Bioreactor System
Autorzy:: Jasem, Y. I.
Jumaha, G. F.
Ghawi, A. H.
Powiązania:: https://bibliotekanauki.pl/articles/123105.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: MBBR
BOD removal
COD removal
SS removal
Opis:: The hospital wastewater is considered as a complex mixture, populated with microbial and a variety of toxic substances. The performance of EEC USA moving bed biofilm reactor (MBBR) with polyethylene media as biofilm support carrier, packaged wastewater treatment plant with a capacity of 250 m(3)/day was evaluated for treating the wastewater from Al-Batul hospital of Baquba city in Iraq in terms of the organic matter and suspended solid removal, along with nitrification and microbial growth for medical wastewater. The test results showed that the average removal efficiency of biochemical oxygen demand (BOD5), chemical oxygen demand (COD), and total suspended solid (TSS) were 79.5%, 74.5%, and 78%, respectively. The system offers good nitrification with the efficiency of 79%. The system shows a weak formation of biomass on carriers, only 1.93 g TSS/m(2) of media, corresponding to 32% of the suspended biomass in the reactor.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 135-140
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Efficiency of removing organic pollutants from wastewater in a household wastewater treatment plant with a hybrid reactor
Autorzy:: Marzec, M.
Powiązania:: https://bibliotekanauki.pl/articles/124693.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater treatment
hybrid reactor
BOD5
COD
TSS
Opis:: The purpose of the study is to evaluate the efficiency of removing organic pollutants from wastewater in a household wastewater treatment plant with a hybrid reactor. The efficiency of the plant was analyzed in terms of decreasing BOD₅, COD and the content of total suspended solids in differentiated technological conditions. The variable parameter was the length of the reactor aeration phase and the dwell phase. Six different aeration variants were analyzed. The efficiency of a wastewater treatment plant with a hybrid reactor in terms of reducing BOD₅ oscillated from 81 to 90%, COD – 64–84%, whereas total suspended solids – 66–89% which, as a rule, was not sufficient to achieve standard levels. The best results were achieved for the following variants: 2h aeration – 2h dwell and 1h aeration – 0.5h dwell. Lower efficiency of the plant could have been attributed to operational problems, mainly failures of the plant control system and uneven conditions such as air temperature, volume and composition of wastewater received in the plant.
Źródło:: Journal of Ecological Engineering; 2016, 17, 5; 240-246
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The Application of Membrane Bioreactor for Greywater Treatment
Autorzy:: Fikri, Elanda
Zulkarnain, Oryza Filial
Azizah, R.
Latif, Mohd Talib
Firmansyah, Yura Witsqa
Powiązania:: https://bibliotekanauki.pl/articles/24201755.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: membrane bioreactor
wastewater
greywater
BOD
COD
total coliform
Opis:: Urban planning management should consider wastewater as a challenge. Wastewater, in this case, grey water, is full of dangerous contaminants and, at specific concentrations, can turn into a substance that affects the environment. The effluent of the released waste must therefore be managed to ensure that it complies with the government’s quality standard criteria. The membrane bioreactor (MBR) technology process produced waste effluents with low concentrations of biological oxygen demand (BOD5), chemical oxygen demand (COD), and total organic carbon (TOC), proving its higher efficiency as a biological processing stage. Total coliforms and E. coli are not present in processed products, detergents and total suspended solid (TSS) are effectively degraded. This is made possible by the considerably lower organic load; as a result, biomass accumulation slows and mixed liquor suspended solids (MLSS), which have low value, are produced. With the assistance of continuous airflow, and without the use of chemicals or backwashing, an ultrafiltration module (UF) with a membrane cut-off size small enough to be able to create a constant permeate flux during the grey water treatment process is necessary. Although processed grey water does not pass denitrification, all parameters linked to the quality of the effluent water exceed environmental quality criteria.
Źródło:: Journal of Ecological Engineering; 2023, 24, 6; 207--213
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

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

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Skocz do pozycji: 9.

Tytuł:: Application of QUAL2K Model for Simulating Water Quality in Hilla River, Iraq
Autorzy:: Al-Dalimy, Shahad Z.
Al-Zubaidi, Hussein A. M.
Powiązania:: https://bibliotekanauki.pl/articles/24202900.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water quality
QUAL2K
management modeling
Hilla River
BOD
DO
Opis:: The quality of the water in Iraq’s Hilla River has been severely degraded as a result of human activities and industrial development. The QUAL2K model, a widely used one-dimensional water quality model, was used to simulate the river’s water quality parameter of CBODu and DO utilizing river and point-source flows rate as well as quality of water metrics observed along the river. Despite a severe lack of data in the research region, the QUAL2K model was determined to be an adequate instrument for the evaluation of quality of water. Simulated results of DO, BOD5, and temperature for the period (October 2022) showed the robustness of the model. Results showed that the two parameters (CBOD and DO) ranged between (9.5 and 10.65) mg/L and between (1.425 and 3.075) mg/L, respectively. Based on statistics, good agreement was found between the model predictions and field data. Thus, using QUAL2K model is an effective tool to manage the river water quality.
Źródło:: Journal of Ecological Engineering; 2023, 24, 6; 272--280
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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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

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Skocz do pozycji: 11.

Tytuł:: The Analysis of the Amount of Pollutants in Wastewater after Mechanical Treatment in the Aspect of their Susceptibility to Biodegradation in the Treatment Plant in Nowy Targ
Autorzy:: Nowobilska-Majewska, Elwira
Bugajski, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/123918.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater
biodegradability
mechanical treatment
BOD5
COD
chemical oxygen demand
biochemical oxygen demand
total nitrogen
total phosphorus
Opis:: The aim of this study was to determine the biodegradability of organic and biogenic contaminants in wastewater flowing into biological reactors in the treatment plant in Nowy Targ. The research period covered the years 2016 and 2017, when 87 samples of raw wastewater and 87 samples of wastewater after mechanical treatment were collected and subjected to physico-chemical analysis. In both types of wastewater, the size of the following indicators was analyzed: BOD₅, COD, total kjeldahl nitrogen (TN) and total phosphorus (TP). The study verified the amount of pollutants in the raw wastewater in order to determine whether they are household wastewater. In the next stage of the analysis, the characteristic values of the analyzed indicators in wastewater after the mechanical treatment process were determined in order to indicate mutual dependences of organic and biogenic indicators. Based on the analysis, it was found that wastewater after mechanical treatment (in the case of its susceptibility to biological decomposition processes of organic pollutants) has an unfavorable COD/BOD₅ ratio. With regard to the susceptibility of wastewater to nitrification, denitrification and dephosphatation processes, in the majority of cases, wastewater is susceptible to these processes. It is recommended to apply an additional source of organic carbon to wastewater prior to biological treatment in order to improve the biodegradation of the analyzed pollutants.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 135-143
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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