Temat: chemical oxygen demand - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: FE2(SO4)3 and Bentonite Use to Reduce Cod Indicators in Wastewater Containing Detergents
Autorzy:: Issayeva, Akmaral
Abubakirova, Azhar
Syzdykova, Marzhan
Arystanova, Saltanat
Anlamasova, Gulnara
Zhumakhanova, Roza
Leska, Boguslawa
Powiązania:: https://bibliotekanauki.pl/articles/2068458.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater
chemical oxygen demand
ferric iron
bentonite
Opis:: Wastewater pollution with detergents is one of the environmental problems associated with the rational use of water resources. The existing methods of physicochemical wastewater treatment, despite their efficiency, are open to secondary environmental pollution. Biological coagulation/flocculation methods are widely used with the plant waste. The aim of this research was the use of ferric iron obtained by means of the bacterial-chemical method and bentonite to reduce the chemical oxygen demand in the wastewater containing detergents. It was identified that the use of Fe2 (SO4)3 obtained using the bacterial-chemical method with thionic bacteria Acidithiobacillus ferrooxidans BIT 1 and bentonite as a clay material is promising. At the same time, it was found that the highest reduction degree in the chemical oxygen demand – 88.1 ± 7.9% in wastewater was noted in the variation where the bacterial-chemical ferric iron in the amount of 1.75 g/L was used in combination with bentonite in the amount of 600 mg/L.
Źródło:: Journal of Ecological Engineering; 2022, 23, 3; 68--73
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Economic Valuation and Effectiveness of Utilizing Electrocoagulation System in Reducing Chemical Oxygen Demand of Textile Industry Wastewater
Autorzy:: Fikri, Elanda
Sintawati, Nita
Ruhmawati, Tati
Powiązania:: https://bibliotekanauki.pl/articles/125280.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: economic valuation
electrocoagulation
Chemical Oxygen Demand
COD
textile industry
Opis:: Industrial activities vary greatly. The textile industry processes produce solid and liquid waste. The liquid waste comes from the process of reviewing threads, removing lubricants from synthetic fibers before weaving, and from the dyeing process. The purpose of this research is to determine the economic valuation and effectiveness of utilizing an electrocoagulation system in reducing Chemical Oxygen Demand (COD) of the textile industry wastewater. This research is a kind of an experimental study involving the pretest and posttest without control design. The research strategy consisted in 9 volt voltage and 5A electric current density with a 3 cm electrode plate distance. The container used in electrocoagulation process was made of plastic with the dimensions of 48.5×27.5×31 cm. The sampling technique was grab sampling with 3 treatments and 6 repetitions. The sample size was 45 liters. The results of this research indicate that the electrocoagulation method can reduce the level of Chemical Oxygen Demand (COD) in the textile production wastewater. The COD level before treatment was 221.5 mg/l, after electrocoagulation with 8 electrode plates dropped to 23.0–41.0 mg/l (85.26% decrease). The economic effectiveness and efficiency of the use of electrocoagulation compared to using conventional method in reducing COD level is only Rp 47.59/liter, while the conventional method reaches Rp 117.089/liter.
Źródło:: Journal of Ecological Engineering; 2019, 20, 8; 35-43
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Wastewater Treatment Methods for Effluents from the Confectionery Industry – an Overview
Autorzy:: Zajda, Magdalena
Aleksander-Kwaterczak, Urszula
Powiązania:: https://bibliotekanauki.pl/articles/124113.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: confectionery industry
wastewater treatment
biological oxygen demand
chemical oxygen demand
low-cost material
Opis:: Wastewater from the confectionery industry is characterized by daily and seasonal variability of composition and quantity which adversely affects the process of their disposal. Confectionery plants discharge about 300-500 m³ per month of technological wastewater. Sewage from the confectionery industry belongs to biologically degradable. It is characterized by high values of chemical oxygen demand (COD) and biological oxygen demand (BOD). The article reviews various methods used to treat wastewater from the confectionery industry. Attention was paid to the applicability of a particular method, its advantages and disadvantages and the costs of implementation. The technology of industrial wastewater treatment uses both mechanical and physicochemical methods as well as biological ones. Techniques of sewage treatment usually consist of several stages which use different processes. Low-cost materials such as natural minerals, agricultural waste, industrial waste, biosorbents, and others contribute to the improvement of aerobic sewage conditions. The main weakness of typical sewage treatment plants is their large area, high investment, and exploitation costs. Therefore, a good solution may be the use of the membrane biological reactor which combines the classical technique of activated sludge and filtration on micro-filtering membranes.
Źródło:: Journal of Ecological Engineering; 2019, 20, 9; 293-304
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Treatment of wastewater from the production of meat and bone meal by the Fenton process and coagulation
Autorzy:: Makara, Agnieszka
Kowalski, Zygmunt
Radomski, Piotr
Olczak, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/2174824.pdf
Data publikacji:: 2022
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: wastewater
meat and bone meal
Fenton process
coagulation
chemical oxygen demand
Opis:: Wastewater from the production of meat and bone meal, due to the high load of organic matter and suspended solids, is a significant problem in the process of its treatment. In this work, we examined the method of treating this wastewater using coagulation with hydrogen peroxide and the Fenton process. Treatment variants included the use of variable Fe2+/H2O2 ratios of 1:5–1:30, variable doses of 3–18.0 g/L H2O2, and 5–10 mL/L of coagulant PIX 113. The calculated reduction degrees showed that, regardless of the treatment variant used, the greatest reduction was obtained for turbidity (100%), phosphorus (99%), followed by color (97%), chemical oxygen demand (70%), and Kjeldahl nitrogen (48%). The proposed treatment options can be used as a preliminary stage in treating wastewater from the production of meat and bone meal.
Źródło:: Polish Journal of Chemical Technology; 2022, 24, 4; 51--60
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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

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Skocz do pozycji: 6.

Tytuł:: Predictive Modelling for Characterisation of Organics in Pit Latrine Sludge from Unplanned Settlements in Cities of Malawi
Autorzy:: Kalulu, K.
Thole, B.
Mkandawire, T.
Kululanga, G.
Powiązania:: https://bibliotekanauki.pl/articles/124540.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Akaike Information Criterion
biochemical oxygen demand
chemical oxygen demand
faecal sludge characteristics
multiple linear regression model
Opis:: The limited availability of data on faecal sludge characteristics remains one of the major challenges faced by developing countries in proper management of faecal sludge. In view of the limited financial resources and expertise in these developing countries, there is a need to come up with less-resource-intensive approaches for faecal sludge characterisation. Despite being used substantially in wastewater, there is limited evidence on the use of predictive modelling as a tool for cost-effective characterisation of faecal sludge. In this study, first order multiple linear regression modelling is investigated as a less-resource-intensive approach for accurate prediction of organics (biochemical oxygen demand and chemical oxygen demand) in pit latrine sludge. The predictor variables explored in the modelling include pH, electrical conductivity, total solids, total volatile solids, fixed solids and moisture content. The modelling uses data collected from 80 latrines in unplanned settlements of four cities in Malawi. The study shows that it is possible to reliably predict chemical oxygen demand and biochemical oxygen demand in pit latrine sludge using electrical conductivity and total solids, which require low levels of resources and expertise to determine.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 141-145
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Indirect Electrochemical Oxidation with Multi Carbon Electrodes for Restaurant Wastewater Treatment
Autorzy:: Sastrawidana, I. D. K.
Sukarta, I. N.
Powiązania:: https://bibliotekanauki.pl/articles/123822.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: chemical oxygen demand
electrochemical oxidation
multi carbon electrodes
removal efficiency
restaurant wastewater
Opis:: The removal of organic matter from the restaurant wastewater was investigated using the electrochemical oxidation method with multi carbon electrodes in a parallel construction. The degradation process was monitored by the measurement of COD concentration as a function of electrolysis time. The effect of operating parameter conditions on COD removal were investigated including initial pH, distance between electrodes, and the applied voltage difference. The results showed that the treatment of restaurant wastewater containing 2 g/L chloride ion using the electrochemical oxidation technique at the operation conditions characterized by: pH 5, distance between electrode of 10 cm and applied voltage of 12 V, enabled to obtained COD removal of 92.84% within 90 min electrolysis time. It is can be concluded that the indirect electrochemical oxidation method with multi carbon electrodes can be used effectively as an alternative technology for reducing COD and may be potentially applied for removal organic pollutants from wastewater at the industrial scale.
Źródło:: Journal of Ecological Engineering; 2018, 19, 1; 200-204
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

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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Skocz do pozycji: 9.

Tytuł:: Carbonaceous materials in petrochemical wastewater before and after treatment in an aerated submerged fixed-bed biofilm reactor
Autorzy:: Trojanowicz, K.
Wojcik, W.
Powiązania:: https://bibliotekanauki.pl/articles/185052.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Chemical Oxygen Demand fractions
petrochemical wastewater
biofilm reactor
zapotrzebowanie tlenu
petrochemiczne ścieki
reaktor
Opis:: Results of the studies for determining fractions of organic contaminants in a pretreated petrochemical wastewater flowing into a pilot Aerated Submerged Fixed-Bed Biofilm Reactor (ASFBBR) are presented and discussed. The method of chemical oxygen demand (COD) fractionation consisted of physical tests and biological assays. It was found that the main part of the total COD in the petrochemical, pretreated wastewater was soluble organic substance with average value of 57.6%. The fractions of particulate and colloidal organic matter were found to be 31.8% and 10.6%, respectively. About 40% of COD in the influent was determined as readily biodegradable COD. The inert fraction of the soluble organic matter in the petrochemical wastewater constituted about 60% of the influent colloidal and soluble COD. Determination of degree of hydrolysis (DH) of the colloidal fraction of COD was also included in the paper. The estimated value of DH was about 62%. Values of the assayed COD fractions were compared with the same parameters obtained for municipal wastewater by other authors.
Źródło:: Chemical and Process Engineering; 2016, 37, 3; 373-382
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effects of the Solubilisation of the Cod of Municipal Waste in Thermal Disintegration
Efektywność upłynnienia ChZT odpadów komunalnych w dezintegracji termicznej
Autorzy:: Myszograj, S.
Powiązania:: https://bibliotekanauki.pl/articles/204588.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Biodegradable fraction of municipal waste
thermal disintegration
Chemical Oxygen Demand (COD)
bioodpady
dezintegracja termiczna
Opis:: This paper presents the content changes in the Chemical Oxygen Demand (COD) solubilised in hydrolisates obtained from thermally disintegrated municipal waste biofractions. A series of tests related to biowaste undergoing thermal treatment at the following temperatures: 55, 75, 95, 115, 135, 155 and 175°C were conducted for 0.5, 1 and 2 hours. The highest increase in COD solid fraction solubilisation (238%) was observed for the samples disintegrated at 175°C for 2 hours. The values of the reaction rate coefficient k₂₀ = 0.6 d^-1 and temperature coefficient θ = 1.023 were determined. Statistical analysis of the multiple regression (correlation coefficient R = 0.89) showed that the temperature has a greater impact on COD solid fraction solubilisation - determined β = 0.66. The multiple correlation coefficient for the treatment time was β = 0.61.
W artykule omówiono zmiany udziału ChZT rozpuszczonego w hydrolizatach uzyskanych z dezintegrowanej termicznie bioofrakcji odpadów komunalnych. Wykonano serie badań, w których bioodpady poddawano obróbce w temperaturach 55, 75, 95, 115, 135, 155, 175°C w czasie 0,5, 1 i 2 godzin. Największy wzrost upłynnienia frakcji stałej ChZT (238%) uzyskano dla próbek dezintegrowanych w temperaturze 175°C w czasie 2 godzin. Wyznaczono wartość współczynnika szybkości reakcji k₂₀=0,096 h i współczynnika temperaturowego θ=1,053. Analiza statystyczna wyników badań wykazała, że większy wpływ na efekt dezintegracji ma temperatura, niż czas obróbki.
Źródło:: Archives of Environmental Protection; 2013, 39, 2; 57-67
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Contaminants Removal from Real Refinery Wastewater Associated with Energy Generation in Microbial Fuel Cell
Autorzy:: Jabbar, Noor Mohsen
Alardhi, Saja Mohsen
Al-Jadir, Thaer
Dhahad, Hayder Abed
Powiązania:: https://bibliotekanauki.pl/articles/2202351.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: microbial fuel cell
phenol
furfural
power generation
COD
chemical oxygen demand
petroleum refinery wastewater
Opis:: Microbial fuel cells (MFCs) pertain to a kind of modern technology for the direct conversion of chemical energy in organic matter from wastewaters into electricity during the oxidation of organic substrates. A system of continuous MFC was constructed for the treatment of real petroleum refinery wastewater (PRW). The treatment of real PRW, operational performance of the MFC system, biodegradation of furfural, and energy output were investigated in this study. The MFC was inoculated by mixed anaerobic bacteria, with Bacillus sp. as the dominant type, and continuously operated for 30 days. The biodegradation of furfural and phenol, which are the most prevalent toxicants in refinery wastewater, was investigated. The MFC system reached maximum energy outputs of 552.25 mW/m3 and 235 mV. In the anodic chamber, the maximum removal of furfural and phenol was higher than 99%, with biodegradation of organic content reaching up to 95%. This study demonstrated the viability of a continuous-flow MFC system as a green technology for the treatment of furfural-rich real refinery effluents while generating electricity.
Źródło:: Journal of Ecological Engineering; 2023, 24, 1; 107--114
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Study of catalytic processes for biodiesel production wastewater treatment
Autorzy:: Borralho, Teresa
Coelho, Solange
Estrelo, Andreia
Powiązania:: https://bibliotekanauki.pl/articles/205024.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: cobalt
chemical oxygen demand
Fenton process
biodiesel production wastewater
catalytic advanced oxidation process
potassium monopersulphate
Opis:: The study of the possibility of removing organic compounds from wastewater originating from the biodiesel purification stage by two catalytic processes, HSO₅^-/transition metal and Fenton method has been presented. The source of the ion HSO₅^-is potassium monopersulphate (2KHSO₅∙KHSO₄∙K₅SO₄) (Oxone) that may be decomposed into radicals (OH., SO₄^-., SO₅^-.) by means of transition metal as Co(II). Different concentrations were used for both compounds and the combination ([Co²⁺] = 1.00μM/[HSO₅^-] = 5.00·10^-2 M) achieved the highest COD removal (60%) and complete decomposition of the oxidant was verified for contact times of 45 min. This process has some advantages comparing to the conventional Fenton method such as the absence of the costly pH adjustment and the Fe(III) hydroxide sludge which characterize this treatment process. The Fenton process showed that the combination of [H₂O₂] = 2.00M/[Fe²⁺] = 0.70 M was the best and archived COD removal of 80%. The treatments studied in this research have achieved high COD removal, but the wastewater from the biodiesel purification stage presents very high parametric values of Chemical Oxygen Demand (667,000 mgO₂/L), so the final COD concentration reached is still above the emission limit of discharge in surface water, according the Portuguese Law (Decree-Law 236/98). However, both treatments have proved to be feasible techniques for the pre-oxidation of the wastewater under study and can be considered as a suitable pre-treatment for this type of wastewaters. A rough economic analysis of both processes was, also, made.
Źródło:: Archives of Environmental Protection; 2019, 45, 2; 66-72
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Wpływ czasu przetrzymania próbek ścieków na chemiczne zapotrzebowanie tlenu
Influence of a lag time of sewage probes on the index COD
Autorzy:: Masiuk, S.
Rakoczy, R.
Kordas, M.
Grądzik, P.
Powiązania:: https://bibliotekanauki.pl/articles/2071520.pdf
Data publikacji:: 2011
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: ścieki
zapotrzebowanie chemiczne na tlen
czas przetrzymywania prób
sewage
chemical oxygen demand
lag time analysis
Opis:: W pracy przedstawiono analizę wpływu czasu przetrzymywania próbek ścieku surowego na chemiczne zapotrzebowanie tlenu (wskaźnik ChZT. Zaproponowano zależność analityczną pozwalająca na wyznaczenie błędu indeksu ChZT w zależności od opóźnienia analizy próbki. Słowa kluczowe: ścieki, chemiczne zapotrzebowanie tlenu, czas przetrzymywania próbki.
This paper presents the influence of the lag time of raw sewage probes on the index COD. The obtained analytical relationship may be applied to determine the error of COD index for the sewage probes.
Źródło:: Inżynieria i Aparatura Chemiczna; 2011, 5; 70-71
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Assessment of some analytical procedures for the examination of the enhanced biological phosphorus removal process
Ocena wybranych procedur analitycznych w badaniach procesu wzmożonego biologicznego usuwania fosforu ze ścieków
Autorzy:: Zybert, I.
Powiązania:: https://bibliotekanauki.pl/articles/396468.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: biologiczna oczyszczalnia ścieków
oczyszczanie ścieków
swastewater treatment
phosphorus remowal
analitical procedures
calcium
magnesium
chemical oxygen demand
Opis:: Owing to the sophisticated character of modern biological wastewater treatment systems, the diagnosis of the mechanisms and interactions involved has become extremely difficult. Further difficulties in their scientific clarification can be generated by some of the analytical procedures used. The primary objective of the study reported on in this paper was to demonstrate that under certain conditions, e.g. during Enhanced Biological Phosphorus Removal, the commonly recommended analytical methods fail to produce reliable results. This holds primary for the examination of COD, assessment of Ca and Mg concentration variability, or procedures of collection and preparation of samples, where the results obtained may differ considerably, depending on the method used. These differences lead to incorrect assessments of, and conclusions on, efficiency, stoichiometry and kinetics of the EBPR process and thus blur the precision of assessing how different parameters affect the process.
Ze względu na złożony charakter współczesnych systemów biologicznego oczyszczania ścieków szczegółowe rozpoznanie mechanizmów i wzajemnych interakcji poszczególnych procesów jednostkowych, odpowiedzialnych za przebieg oczyszczania, jest sprawą skomplikowaną. Dodatkowe przyczyny tych trudności wynikać mogą z zastosowania niektórych metod analitycznych. Głównym celem niniejszego artykułu jest zwrócenie uwagi na fakt, że w specyficznych warunkach, charakterystycznych np. dla przebiegu procesu wzmożonego biologicznego usuwania fosforu ze ścieków (ang. EBPR), powszechnie wykorzystywane i rekomendowane metody analityczne mogą okazywać się zawodne, dając niepoprawne i niewiarygodne wyniki. Dotyczy to w szczególności metod oceny wskaźnika ChZT, analizy zmienności stężeń Ca i Mg, a także procedur poboru i przygotowania prób do analiz, gdzie uzyskiwane wyniki mogą wykazywać znaczące różnice w zależności od zastosowanej metodyki. Różnice te prowadzą do nieprawidłowej oceny i wniosków na temat efektywności, stechiometrii i kinetyki procesu EBPR, zaciemniając tym samym precyzję oceny wpływu różnych czynników na proces.
Źródło:: Civil and Environmental Engineering Reports; 2007, 2; 113-127
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Natural treatment of woolen processing industry wastewater
Autorzy:: Qurashi, S.
Sahu, O.
Powiązania:: https://bibliotekanauki.pl/articles/10942.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: waste water
natural treatment
woolen processing industry
waste water treatment
environment protection
public health
industrial waste water
chemical oxygen demand
biological oxygen demand
Opis:: Wastewater treatment is becoming ever more critical due to diminishing water resources, increasing wastewater disposal costs, and stricter discharge regulations that have lowered permissible contaminant levels in waste streams. The ultimate goal of wastewater management is the protection of the environment in a manner commensurate with public health and socio-economic concerns. The aim of our study is to use natural occurring plant (Pistia stratiotes) to reduce the chemical oxygen demand and color from the industrial waste water. It was found that 120 mg/l of Chemical oxygen demand and 85 mg/l of color reduction was observed with Pistia stratiotes.
Źródło:: International Letters of Natural Sciences; 2014, 05
2300-9675
Pojawia się w:: International Letters of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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