Temat: BOD - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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: 2.

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: 3.

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: 4.

Tytuł:: Long-term water quality monitoring using Sentinel-2 data, Głuszyńskie Lake case study
Autorzy:: Ciężkowski, Wojciech
Frąk, Magdalena
Kardel, Ignacy
Kościelny, Marcin
Chormański, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/36055080.pdf
Data publikacji:: 2022
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: sentinel-2
inland water
biological oxygen demand
BOD
dissolved organic carbon
DOC
electrical conductivity
EC
chlorophyll concentration
CHL
Opis:: This study shows the results of long-term inland water monitoring using Sentinel-2 data for Głuszyńskie Lake in the years 2015–2022. Four water quality parameters: biological oxygen demand (BOD), dissolved organic carbon (DOC), chlorophyll concentration (CHL) and electrical conductivity (EC) were calculated according to formulas found in the literature. The results were validated based on measurements conducted in 2021 and 2022, where for BOD, DOC and CHL high determination coefficients (0.77 and 0.79) were observed, and the EC determination coefficient was equal to 0.45. The results show that empirical formulas can be used for qualitative analyses of inland water quality, while for quantitative analyses more extensive field work needs to be performed.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2022, 31, 4; 283-293
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Mathematical modelling by convection-diffusion with reaction of organic pollution in the wadi Mouillah stream, north-western Algeria
Autorzy:: Benadda, Lotfi
Djelita, Belkheir
Chiboub-Fellah, Abdelghani
Powiązania:: https://bibliotekanauki.pl/articles/2174337.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: biochemical oxygen demand
BOD5
diffusion
Hammam Boughrara dam
mathematical modelling
pollution
total phosphorus
wadi Mouillah
Opis:: This work describes the behaviour of organic pollutants along the wadi Mouillah watercourse and its main tributaries and their impacts on the Hammam Boughrara dam, located in the NW of Algeria, in the Wilaya of Tlemcen. The use of a database relating to physico-chemical, biotic and hydrological variables, covering the period from January 2006 to December 2009, contributed to the understanding of the spatiotemporal evolution of each variable. The application of a mathematical model of the diffusion by convection-dispersion with a reaction on two characteristic parameters of organic pollution, the biochemical oxygen demand (BOD5) which records values above the norm, with peaks that can reach 614%, and total phosphorus (Ptot), which the concentration is always higher with maxima reaching 53 mg∙dm-3 favouring eutrophication; this made it possible with precision to synthesise the propagation of pollutants in the liquid mass. The results obtained on the waters of Wadi Mouillah are therefore of poor quality; there is a need to set up a rigorous water quality monitoring system, with water treatment and decontamination devices to preserve the water resources. This will allow to contribute to better management of water quality in terms of combating the spread of pollution. Therefore, they can be used to support decisions in the context of sustainable development.
Źródło:: Journal of Water and Land Development; 2022, 54; 26--37
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analysis of the removal of BOD5, COD and suspended solids in subsurface flow constructed wetland in Latvia
Analiza usuwania BZT5, ChZT i zawiesiny ogólnej w sztucznym ekosystemie mokradłowym o poziomym przepływie podpowierzchniowym, zlokalizowanym na Łotwie
Autorzy:: Grinberga, L.
Grabuza, D.
Grinfelde, I.
Lauva, D.
Celms, A.
Sas, W.
Głuchowski, A.
Dzięcioł, J.
Powiązania:: https://bibliotekanauki.pl/articles/2084106.pdf
Data publikacji:: 2021
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: constructed wetlands
subsurface flow
BOD
COD
suspended solids
Opis:: This study aims to evaluate the performance of subsurface flow constructed wetland in Latvia which was established to receive storm water from surface runoff from a farmjard in agricultural area. As a part of this study, subsurface horizontal flow wetlands was monitored, in order to evaluate the changes in the efficiency of treatment depending on biological factors. The efficiency of horizontal subsurface flow constructed wetland was evaluated by comparing the concentration of total suspended solids (TSS), biochemical oxygen demand (BOD5) and chemical oxygen (COD) at inlet and outlet of the wetland depending on temperature and pH. Since June 2014, water quality monitoring in a research site in the farm “Mezaciruli”, Zaļenieku parish, Jelgava region has been carried out to treat the point source agricultural runoff from the impermeable pavements. The analysis of the data obtained in the monitoring allows to draw conclusions about the influence of certain factors in the subsurface flow constructed wetlands under the climate and environmental conditions in Latvia.
Źródło:: Acta Scientiarum Polonorum. Architectura; 2021, 20, 4; 21-28
1644-0633
Pojawia się w:: Acta Scientiarum Polonorum. Architectura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Investigations on the effectiveness of wastewater purification in medium sand with assisting opoka rock layer
Autorzy:: Kalenik, Marek
Chalecki, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2032948.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: drainage
infiltration
medium grain sand
BOD5
COD
treated sewage
drenaż
infiltracja
piasek średnioziarnisty
BZT5
ChZT
ścieki oczyszczone
Opis:: The objective of the undertaken investigations was to examine in laboratory conditions whether an introduction of an assisting opoka rock layer with the granulation of 1–6 mm into the ground improves the removal efficiency of nitrogen and phosphorus compounds from domestic sewage. The performed investigations concerned the layer supporting the removal efficiency of domestic sewage in a home sewage treatment plant under infiltration drainage. The model investigations of wastewater purification were carried out in a medium sand bed with an assisting, 0.10 and 0.20 m thick opoka rock layer. The effectiveness of wastewater purification related to basic qualitative indicators (total suspended solids – TSS, BOD5, COD, total nitrogen, total phosphorus) was in line with the Polish standards on sewage disposal into grounds and surface water. The medium sand soil bed with the 0.20 m thick assisting opoka rock layer showed higher effectiveness of wastewater purification than that 0.10 m thick. The application of the 0.20 m thick opoka rock layer increased the removal efficiency regarding TSS by 6.2%, total nitrogen by 20.4%, ammonium nitrogen by 8.3% and total phosphorus by 2.9%, and removal efficiency regarding BOD5 by 1.2% and COD by 1.9% with relation to the 0.10 m thick assisting layer (all percentages − in average). The results confirm that the natural opoka rock with the granulation of 1–6 mm can be used to assist in the removal of nitrogen and phosphorus compounds from wastewater with the application of infiltration drainage.
Źródło:: Environment Protection Engineering; 2021, 47, 1; 53-65
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Methods of processing whey waste from dairies. A review
Autorzy:: Ponist, Juraj
Dubsikova, Veronika
Schwarz, Marian
Samesova, Dagmar
Powiązania:: https://bibliotekanauki.pl/articles/2032849.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: whey
aerobic process
dairy waste
BOD
COD
serwatka
proces tlenowy
odpady z mleczarni
ChZT
BZT
Opis:: The purpose of the study was to evaluate the methods of processing whey. The valorization method is suitable for the use of cheese whey and whey permeate to produce beverages with or without microbial conversion. However, this method does not ensure microbial conversion of lactose. Therefore, the organic load will not be reduced. The main advantage of aerobic decomposition is the relatively rapid degradation of organic matter. However, the high organic load in the crude cheese whey makes aerobic decomposition unsuitable and restrictions on oxygen transport may occur. Anaerobic decomposition can be used in various areas for the treatment of waste with a high organic load. The disadvantage of anaerobic processes is a higher cost compared to aerobic treatment. The combination of individual technologies significantly reduces the hydraulic retention time of the aerobic process and improves waste treatment. At present, there is a lack of studies in this area.
Źródło:: Environment Protection Engineering; 2021, 47, 4; 67-84
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

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: 10.

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: 11.

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: 12.

Tytuł:: Assessment of the effluent polishing plant using a ultrafiltration membrane installed at a palm oil mill
Autorzy:: Abdul Hadi, Numan
Hawari, Yahaya
Ngatiman, Muzzammil
Jalani, Nor Faizah
Wahab, Noorshamsiana Abdul
Halim, Rohaya Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/208299.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: BOD
palm oil mill
wastewater treatment
ultrafiltration membranes
BZT
olej palmowy
oczyszczanie ścieków
membrany ultrafiltracyjne
Opis:: Palm oil mills discharge raw effluent with high biochemical oxygen demand (BOD) of about 25 000 mg O₂/dm³ . Conventional effluent treatment system uses ponds with a long hydraulic retention time of about 55–85 days, but the reduction of BOD is usually halted at 100–250 mg O₂/dm ³. Further reduction of BOD to below 20 mg O₂/dm³ to meet regulation requirement needs further advanced treatment. This study evaluates the efficiency of an effluent polishing plant installed at a palm oil mill targeting final effluent BOD below 20 mg O₂/dm³. Characteristic of the incoming and treated effluent, dissolved oxygen in the aeration ponds and the effluent flow rate of the treatment plant have been determined. Due to low process throughput at the mill, the polishing plant operated at only 60% of its designed capacity. Treatment of effluent showed reduction of BOD from 39.3±5.8 to 6.1±3.8 mg O₂/dm³, i.e., a reduction by 80–94%. Colour – a newly proposed regulation parameter – was reduced from 1081±69 to 845±60 ADMI, i.e., by 11–30%. This study indicates that while the treatment of effluent to reduce the BOD to below 20 O₂/dm³ O₂/dm³ is feasible, reduction of colour to less than 100 ADMI is not achievable.
Źródło:: Environment Protection Engineering; 2019, 45, 1; 155-170
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of wastewater temperature and concentration of organic compounds on the efficiency of ammonium nitrogen removal in a household treatment plant servicing a school building
Wpływ temperatury ścieków oraz związków organicznych na skuteczność usuwania azotu amonowego w przydomowej oczyszczalni przy budynku szkolnym
Autorzy:: Bugajski, Piotr
Kurek, Karolina
Jóźwiakowski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/205398.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: household wastewater treatment plant
ammonium nitrogen
organic compounds BOD5
air temperature
wastewater temperature
przydomowa oczyszczalnia ścieków
azot amonowy
związki organiczne BZT5
temperatura powietrza
temperatura ścieków
Opis:: The aim of this study was to determine the impact of the temperature of wastewater in a biological reactor with activated sludge and the BOD₅/N-NH₄ ratio in the influent to the treatment plant on nitrification efficiency and the concentration of ammonium nitrogen in treated wastewater. Tests were carried out in a household wastewater treatment plant which collects and treats sewage from a school building and a teacher’s house. During the 3-year study, large fluctuations in the sewage temperature in bioreactor were noted which was closely related to the ambient temperature. There were also large fluctuations in the concentration of organic matter and the concentration of ammonium nitrogen in inflowing sewage. The influence of wastewater temperature in the bioreactor and the BOD₅/N-NH₄ ratio on the concentration of ammonium nitrogen in treated wastewater was determined using Pearson’s linear correlation. A statistical analysis showed that a 1°C decrease in the temperature of wastewater in the bioreactor increased the concentration of ammonium nitrogen in treated wastewater by 2.64 mgN-NH₄·L^-1. Moreover, it was found that nitrification depended on the ratio of BOD₅ to the concentration of ammonium nitrogen in wastewater flowing into the bioreactor. An increase in the BOD₅/N-NH₄ ratio by 1 value led to a 5.41 mgN-NH₄·L^-1 decrease in the concentration of ammonium nitrogen.
Celem pracy było określenie wpływu temperatury ścieków w reaktorze biologicznym z osadem czynnym oraz stosunku BZT₅/N-NH₄ w ściekach dopływających do oczyszczalni na skuteczność procesu nitryfikacji i stężenia azotu amonowego w ściekach oczyszczonych. Badania prowadzono w przydomowej oczyszczalni, do której odpływają ścieki z budynku szkolnego oraz domu nauczyciela. W okresie 3-letnich badań odnotowano duże wahania temperatury ścieków w bioreaktorze co było ściśle związane z temperaturą otoczenia. Stwierdzono również duże wahania stężenia materii organicznej oraz stężenia azotu amonowego w ściekach dopływających. Analizę wpływu temperatury ścieków w bioreaktorze oraz stosunku BZT₅/N-NH₄ na stężenie azotu amonowego w ściekach oczyszczonych określono za pomocą korelacji liniowej Persona. W wyniku przeprowadzonej analizy statystycznej stwierdzono, że wraz obniżeniem temperatury ścieków w bioreaktorze o 1°C następuje zwiększenie stężenia azotu amonowego w ściekach oczyszczonych o 2,64 mgN-NH₄·L^-1. Ponadto stwierdza się, że proces nitryfikacji zależny jest od stosunku BZT₅ do stężenia azotu amonowego w ściekach dopływających do bioreaktora. Wraz ze wzrostem zależności BZT₅/N-NH₄ o 1 maleje stężenie stężenia azotu amonowego o 5,41 mgN-NH₄·L^-1
Źródło:: Archives of Environmental Protection; 2019, 45, 3; 31-37
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

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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Tytuł:: Correlations between organic pollution indicators in municipal wastewater
Korelacje pomiędzy wskaźnikami zanieczyszczeń organicznych w ściekach komunalnych
Autorzy:: Siwiec, T.
Reczek, L.
Michel, M. M.
Gut, B.
Hawer-Strojek, P.
Czajkowska, J.
Jóźwiakowski, K.
Gajewska, M.
Bugajski, P.
Powiązania:: https://bibliotekanauki.pl/articles/205468.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: BOD5
CODCr
TOC
CODMn
wastewater
municipal wastewater treatment plant
BZT5
ścieki
miejska oczyszczalnia ścieków
Opis:: The paper presents the results of a study of parameters used for determining the amount of organic pollutants in wastewater flowing into a collective wastewater treatment plant with a population equivalent of about 120 000 PE. The plant constituted part of a sewage system. Assays were performed for biochemical oxygen demand (BOD₅), chemical oxygen demand (COD_Cr), permanganete index (COD_Mn) and total organic carbon (TOC). In addition, the pH of wastewater and its alkalinity were determined. Sampling of incoming wastewater and measurement of physicochemical parameters were performed once a week, in the spring. A total of 44 samples of wastewater were collected. The correlations between the individual parameters and the correlations between the ratios of these parameters were determined. It was found that it was possible to estimate, with sufficient accuracy, the values of selected parameters for determining the concentrations of organic compounds in municipal wastewater, knowing the values of other parameters in this group. Moreover, it was shown that, knowing the relationship between the analyzed parameters, one can find multiple regression equations for a given type of wastewater, which allow one to calculate the remaining relationships with a good fi t, i.e. a determination factor R² greater than 0.6.
W pracy przedstawiono wyniki badań parametrów wykorzystywanych do oznaczania ilości zanieczyszczeń organicznych w ściekach wpływających do zbiorczej oczyszczalni ścieków o równoważnej liczbie ludności około 120 000 mieszkańców. Zakład stanowi część systemu kanalizacyjnego. Testy przeprowadzono dla biochemicznego zapotrzebowania na tlen (BZT₅), chemicznego zapotrzebowania na tlen (COD_Cr), utlenialności (COD_Mn) i ogólnego węgla organicznego (TOC). Ponadto określono wartość pH ścieków i ich zasadowość. Pobieranie próbek dopływających ścieków i pomiar parametrów fizykochemicznych przeprowadzano raz w tygodniu, na wiosnę. Zebrano łącznie 44 próbki ścieków. Określono korelacje między poszczególnymi parametrami i korelacje między stosunkami tych parametrów. Stwierdzono, że możliwe było oszacowanie, z wystarczającą dokładnością, wartości wybranych parametrów do oznaczania stężeń związków organicznych w ściekach komunalnych, znając wartości innych parametrów w tej grupie. Ponadto wykazano, że znając zależność między analizowanymi parametrami, można znaleźć równania regresji wielokrotnej dla danego typu ścieków, które pozwalają obliczyć pozostałe zależności przy dobrym dopasowaniu, o współczynniku determinacji R² większym niż 0,6.
Źródło:: Archives of Environmental Protection; 2018, 44, 4; 50-57
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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