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Tytuł:
Alternating Aerobic and Anoxic Conditions to Eliminate Sludge Accumulation in the Oxidation Ditch System
Autorzy:
El-Morsy, Ahmed
Ayoub, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/24201600.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
activated sludge
denitrification
nitrification
oxidation ditch
sludge accumulation
upgrade
wastewater treatment
Opis:
The purpose of the present study is to investigate the performance of an upgraded oxidation ditch (OD) system, which was designed and implemented to solve the problem of sludge accumulation at the bottom as well as to get the best removal efficiency of total nitrogen (TN). The upgrading concept is based on dividing the operating volume of the upgraded OD to achieve interchanging between aerobic and anoxic circumstances in order to provide simultaneous nitrification and denitrification (SND). The obtained results indicated that the average TN removal efficiency was 60%, which could be obtained due to a highly efficient SND approach. In addition, the better TN removal efficiency corresponds to the lower sludge volume index (SVI), which reflects the efficiency of the upgraded OD in preventing the accumulation of sludge at the bottom. Effluent ammonium-nitrogen (NH4+-N) and nitrate (NO3--N) concentrations corresponding to a minimum SVI of 41.9 mL/g were 8.6 mg/L for NH4+-N and 8.6 mg/L for NO3--N, respectively. Furthermore, the upgraded OD successfully removes 5-day biochemical oxygen demand (BOD5), chemical oxygen demand (COD), and total suspended solids (TSS) below the permissible limit for final effluent of 60, 80, and 50 mg/L respectively.
Źródło:
Journal of Ecological Engineering; 2023, 24, 3; 304--314
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Benefits and Risks of Liquid Sewage Sludge Recycling in Agricultural Spreading – A Case Study of WWTP of Skhirat, Morocco
Autorzy:
Achkir, Abdelmajid
Aouragh, Abdelhakim
El Mahi, Mohammed
Lotfi, El Mostapha
Kabriti, Mohamed
Abid, Abdesalam
El Moussaoui, Tawfik
Yagoubi, Maâmar
Powiązania:
https://bibliotekanauki.pl/articles/2202347.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sewage sludge
WWTP
wastewater treatment plant
Skhirat
Morocco
liquid sludge
physicochemical parameter
bacteriological parameter
heavy metals
agricultural
Opis:
The sewage sludge recycling as an agricultural land resource has received a great deal of attention worldwide. This practice has highly increased because of ever-increasing municipal wastewater production and the awareness of its fertilizing potential as amendment resources. However, there is a concern about land spreading linked mainly to health associated risks due to the presence of diverse pollutants. Thus, sewage spreading management is a key factor the guarantees benefits and avoids risks. The present work aimed to investigate the benefits and risks of sewage sludge (SS) application on agricultural land. To this end, physicochemical main parameters and bacteriological indicators, fecal coliform (FC) and fecal streptococcus (FS), of the sewage sludge generated form WWTP of Skhirat, Morocco, were performed during the period 2018–2019. The obtained results of physicochemical parameters reveal high concentration of organic matter in SS, which reach 96.3 mg/l, and in nutrients. Indeed, total Kjeldahl nitrogen TKN reaches a maximum of 3791 mg/l, potassium K+ reaches 58.71 mg/l. In addition, the average content of FC and FS are around 5.40 CFU/ml and 5.85 CFU/ml, respectively, whereas total phosphorus reaches 508.25 mg/l. In addition, concentrations of micronutrients such as Cl-, SO42-, Ca2+, Mg2+, and Na+ were high, which is interesting and could benefit for both soils and plant. Furthermore, this sewage sludge contains high concentration of heavy metals, mainly zinc and copper which could limit reuse in land spreading. The obtained results were compared to the applied standards and directives established within the framework of the agricultural spreading.
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 277--288
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of sewage sludge composition for agricultural use
Charakterystyka składu osadów ściekowych przeznaczonych do celów rolniczych
Autorzy:
Vitenko, Tetiana
Marynenko, Nataliia
Kramar, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/24201151.pdf
Data publikacji:
2023
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
sewage sludge
sewage treatment
heavy metals
sludge's physical composition
sludge's chemical composition
osady ściekowe
oczyszczanie ścieków
metale ciężkie
skład fizyczny osadów ściekowych
skład chemiczny osadów ściekowych
Opis:
The article focuses on the research conducted on sewage sludge in Ternopil City, Ukraine, with a specific emphasis on its microelement composition and implications for disposal and utilisation. Bacterial contamination in both old and new sludge storage facilities is revealed by the study. It is found that the sludge holds potential as a fertiliser due to its nutrient content and organic matter, although adjustments may be necessary for specific soil conditions. However, it is determined that the permissible limits for agricultural use are exceeded by heavy metal concentrations, indicating pollution resulting from landfills, old pipes, and intensive agriculture. According to existing regulations, the sludge is considered suitable only for composting. The importance of sludge monitoring, treatment, and management is underscored by the findings, as they are crucial for ensuring safe disposal, mitigating environmental risks, and addressing potential health hazards.
Artykuł koncentruje się na badaniach przeprowadzonych na osadach ściekowych w Tarnopolu na Ukrainie, ze szczególnym naciskiem na ich skład mikroelementowy oraz implikacje dla ich usuwania i wykorzystania. Badanie ujawniło zanieczyszczenie bakteryjne zarówno w starych, jak i nowych obiektach składowania osadów ściekowych. Stwierdzono, że osad ma potencjał jako nawóz ze względu na zawartość składników odżywczych i materii organicznej, chociaż może być konieczne dostosowanie do określonych warunków glebowych. Ustalono jednak, że dopuszczalne limity dla zastosowań rolniczych są przekraczane przez stężenia metali ciężkich, co wskazuje na zanieczyszczenie wynikające ze składowisk odpadów, starych rur i intensywnego rolnictwa. Zgodnie z obowiązującymi przepisami osad jest uważany za odpowiedni tylko do kompostowania. Wyniki badań podkreślają znaczenie monitorowania, przetwarzania i zarządzania osadami ściekowymi, ponieważ mają one kluczowe znaczenie dla zapewnienia bezpiecznej utylizacji, łagodzenia zagrożeń dla środowiska i przeciwdziałania potencjalnym zagrożeniom dla zdrowia.
Źródło:
Ekonomia i Środowisko; 2023, 2; 296--307
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental contaminants of emerging concern: occurrence and remediation
Autorzy:
Prasad, Majeti Narasimha Vara
Elchuri, Sailaja V.
Powiązania:
https://bibliotekanauki.pl/articles/31342696.pdf
Data publikacji:
2023
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
contaminants of emerging concern
CECs
health hazards
chemical waste
disposal
sludge treatment
water treatment
bioremediation
engineered organisms
zagrożenie zdrowotne
odpady chemiczne
usuwanie odpadów
osad ściekowy
oczyszczanie wody
bioremediacja
organizmy inżynieryjne
Opis:
Certain contaminants are termed as emerging (Contaminants of Emerging Concern, CEC) since all aspects of these pollutants are not known and their regulation is not ununiform across the nations. The CECs include many classes of compounds that are used in various industries, plant protection chemicals, personal care products and medicines. They accumulate in waterbodies, soils, organisms including humans. They cause deleterious effects on plant animal and human health. Therefore, alternative greener synthesis of these chemicals, sustainable economic methods of waste disposal, scaling up and circular methods using sludge for removing the contaminants are innovative methods that are pursued. There are several improvements in chemical waste treatments using electro-oxidation coupled with solar energy, high performing recycled granular activated charcoal derived from biomass are few advances in the field. Similarly, use of enzymes from microbes for waste removals is a widely used technique for bioremediation. The organisms are genetically engineered to remove hazardous chemicals, dyes, and metals. Novel technologies for mining economically the precious and rare earth elements from e-waste can improve circular economy. However, there is additional need for participation of various nations in working towards greener Earth. There should be pollution awareness in local communities that can work along with Government legislations.
Źródło:
Chemistry-Didactics-Ecology-Metrology; 2023, 28, 1-2; 57-77
2084-4506
Pojawia się w:
Chemistry-Didactics-Ecology-Metrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the Composition and Environmental Impact of Sewage Sludge
Autorzy:
Jumasheva, Kamshat
Syrlybekkyzy, Samal
Serikbayeva, Akmaral
Nurbaeva, Farida
Kolesnikov, Alexandr
Powiązania:
https://bibliotekanauki.pl/articles/24201791.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sludge
sewage treatment plant
wastewater
mapping
Opis:
The article examinee the characteristics of sewage sludge and its impact on the environment. The description of technical installations, sludge sites in the municipal wastewater treatment systems, which are sources of unfavorable sanitary and epidemiological condition of the studied territory, was presented. A detailed analysis of the structure, composition and morphology of sludge sediment was given. It was found that the sludge presents a loose, rough heterogeneous porous structure represented by the presence of a fibrous substrate with amorphous scaly-crystalline inclusions. During laboratory analyses of the composition of the dry residue, the presence of such types of heavy metals as chromium, manganese, nickel, copper, zinc, lead, cobalt, molybdenum, cadmium was revealed. The excess of permissible concentrations of various elements was observed: chromium more than 7.1 at MPC – 6.0 by 1.18 times; copper more than 3.3 at MPC – 3.0 by 1.1 times; zinc more than 27.3 at MPC – 23.0 by 1.18 times; lead more than 34.3 at MPC – 32.0 by 1.07 times; cobalt more than 6.4 at MPC – 5.0 by 1.28 times; molybdenum more than 6.9 at MPC – 5.0 by 1.3 times. Soil analysis revealed a pH of 7.1, which is neutral, may be optimal for plants; the concentration of calcium, iron and chromium does not exceed the established maximum permissible values. When analyzing the air environment of the territory of the treatment facilities, the presence of gaseous pollutants, such as methane, ammonia, nitrogen dioxide, hydrogen sulfide, carbon monoxide, was established. It has been established that anthropogenic sludge landfills are the sources that create a technogenic load on the atmospheric air, polluting it with methane, since the concentration of methane exceeds the MPC by more than 3 times.
Źródło:
Journal of Ecological Engineering; 2023, 24, 3; 315--322
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane aspekty bioługowania metali z odpadów
Selected Aspects of Bioleaching of Metals from Waste
Autorzy:
Kamizela, Tomasz
Kowalczyk, Mariusz
Worwąg, Małgorzata
Borutko, Dariusz
Powiązania:
https://bibliotekanauki.pl/chapters/26917516.pdf
Data publikacji:
2023-04-03
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
bioługowanie
oczyszczanie gleby
odpady przemysłowe
odpady elektroniczne
przeróbka osadów ściekowych
zużyte akumulatory i baterie
żużle hutnicze
bioleaching
electronic waste
industrial waste
metallurgical slag
used
accumulators and batteries
sewage sludge treatment
soil treatment
Opis:
Bioługowanie jest to proces ługowania mikrobiologicznego, który określa się jako proces o niskiej szkodliwości dla środowiska i w niewielkim stopniu powodujący zużycie zasobów. Ogólnie dominuje stwierdzenie, że proces bioługowania będzie stanowił alternatywę dla ługowania chemicznego. Należy jednak nadmienić, że proces bioługowania nie jest obecnie na szeroką skale stosowany i nie ma wyraźnych przykładów zastosowania komercyjnego. Istotną zmienną decydującą o komercjalizacji bioługowania są przeszkody natury ekonomicznej oraz nie w pełni gotowe technologie. Przydatność i efektywność procesu bioługowania badana jest w szerokim zakresie substratów. Dotyczy to zwłaszcza odpadów, które można poddać procesowi bioługowania w miejscu ich powstawania bądź utylizacji. Zastosowanie tej metody jest badane głównie pod kątem ekstrahowania metali z odpadów stałych, między innymi popiołów po spaleniu odpadów, odpadów elektronicznych, baterii litowo-jonowych, wykorzystanych katalizatorów, ale też w kierunku oczyszczania skażonej gleby. Wydaje się, że postęp w badaniach nad bioługowaniem metali z odpadów pozostaje na poziomie poszukiwań substratu, który umożliwi przejście w fazę zaawansowanych badań przemysłowych i dalej badań rozwojowych. Bioługowanie metali z odpadów przemysłowych pozostaje zatem jedną z potencjalnych opcji ich przetwarzania.
Bioleaching is a microbial leaching process that is defined as having a low environmental impact and low resource consumption. Overall, the dominant view is that the bioleaching process will be an alternative to chemical leaching. It should be noted, however, that the bioleaching process is currently not widely used and there are no clear examples of commercial application. An important variable deciding on the commercialization of bioleaching are obstacles of an economic nature, but also not fully ready technologies. The usefulness and efficiency of the bioleaching process is tested in a wide range of substrates. This especially applies to waste that can be bioleached at the site of its generation or disposal. The application of this method is mainly investigated in terms of metal extraction from solid waste, including waste ash, electronic waste, lithium-ion batteries, used catalysts, but also for the treatment of contaminated soil. It seems that the progress in research on bioleaching of metals from waste remains at the level of searching for a substrate that will enable the transition to the phase of advanced industrial research and further development research. Bioleaching of metals from industrial waste therefore remains one of the potential treatment options.
Źródło:
Rozwiązania proekologiczne w inżynierii środowiska; 107-120
9788371939204
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of aerobic and anaerobic sewage sludge disposal concepts
Analiza koncepcji aerobowego oraz anaerobowego unieszkodliwiania osadów ściekowych
Autorzy:
Bartkowska, Izabela
Wawrentowicz, Dariusz
Dzienis, Lech
Powiązania:
https://bibliotekanauki.pl/articles/2097398.pdf
Data publikacji:
2022
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
sewage sludge
sewage sludge treatment
sewage sludge management
capital expenditure
operating cost
osad ściekowy
przetwarzanie osadów ściekowych
zagospodarowanie osadów ściekowych
nakład inwestycyjny
koszt eksploatacyjny
Opis:
The article aimed to analyze the concept of modernisation of sludge management prepared for an exemplary sewage sludge treatment plant. Four variants of solutions, based on different processes, aerobic (oxygenic), anaerobic or – aerobic – anaerobic, were discussed. The article presents the characteristics of essential elements of the proposed solutions. The technical and technological parameters of each of the variants are exposed. The expected capital expenditure and basic operating costs are presented. A cost-effectiveness analysis of the options has also been carried out. The analysed technological processes ensure obtaining hygienically and sanitary safe end products. They contribute significantly to minimising the amount of sewage sludge. The most economically efficient, with the lowest average annual costs, is the variant with the application of anaerobic thermophilic-mesophilic sludge stabilisation. The highest average annual costs were obtained for the variant with drying and incineration of sludge.
Celem artykułu była analiza koncepcji modernizacji gospodarki osadowej opracowanych dla przykładowej oczyszczalni ścieków. Omówiono cztery warianty rozwiązań, oparte na różnych procesach, tlenowych, beztlenowych czy tlenowo-beztlenowych. W artykule przedstawiono charakterystykę istotnych elementów proponowanych rozwiązań. Wyeksponowane zostały parametry techniczno-technologiczne każdego z wariantów. Zaprezentowano przewidywane nakłady inwestycyjne i podstawowe koszty eksploatacyjne. Wykonana została również analiza efektywności kosztowej wariantów. Analizowane procesy technologiczne zapewniają otrzymywanie bezpiecznych pod względem higieniczno-sanitarnym produktów końcowych. W znacznym stopniu przyczyniają się do minimalizacji ilości osadów ściekowych. Najbardziej efektywnym pod względem ekonomicznym, charakteryzującym się najniższymi średniorocznymi kosztami, jest wariant z zastosowaniem beztlenowej termofilowo-mezofilowej stabilizacji osadów. Najwyższe średnioroczne koszty uzyskano w przypadku wariantu z suszeniem i spalaniem osadów.
Źródło:
Ekonomia i Środowisko; 2022, 2; 203--221
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Composition of Municipal Wastewater Sludge from Small Settlements in East Kazakhstan
Autorzy:
Litvinov, Vadim
Daumova, Gulzhan
Shaikhov, Maksat
Sergeyeva, Natalya
Powiązania:
https://bibliotekanauki.pl/articles/2173300.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
municipal treatment facilities
domestic wastewater
sludge
biogenic elements
organic matter
heavy metals
microbiological indicators
Opis:
One of the greatest environmental problems of modern countries is the pollution of territories with waste. Of particular concern are the wastes generated during the treatment of municipal wastewater, i.e. sewage sludge. They are the inevitable price of urbanization and improved quality of life. As a result of the research conducted, a comprehensive analysis of the composition of municipal sewage sludge was conducted using the example of four small settlements in East Kazakhstan. The results of laboratory studies established the composition of the organic part, biogenic elements, as well as microbiological and parasitological indicators. It was revealed that cadmium, copper, zinc and arsenic are main sources of problems in wastewater treatment plant sludge. For copper and zinc, the standards set by the European Directive 86/278/EEC were exceeded by up to 3.2 and 1.5 times, respectively. At the same time, there is an increased content of nutrients. Organic matter in all studied samples exceeds the minimum established values by 3.5–3.7 times; the potassium content in all studied samples is 5.1–5.6 times higher than the minimum established value for organomineral fertilizers in the Republic of Kazakhstan. The concentration of hydrogen ions (pH) corresponds to neutral. Tests for the determination of microbiological and parasitological parameters indicate that the studied sludge does not contain various pathogenic bacteria and microorganisms.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 105--112
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Treatment Effect of Heavy Metal Pollution from Sewage Sludge in Wastewater Treatment Plant Discharge in China’s Nanjing MV Industrial Park
Autorzy:
Xu, Lingjuan
Sun, Fengqi
Han, Xiuyan
Powiązania:
https://bibliotekanauki.pl/articles/2174921.pdf
Data publikacji:
2022
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
assessment of treatment effect
heavy metal pollution
niche model
sewage sludge
wastewater treatment plant
Opis:
To explore methods for a comprehensive assessment of the treatment effect of heavy metal pollution in the sewage sludge from China’s industrial parks, we studied the wastewater treatment plant of the Nanjing MV Industrial Park as an example. Eight common heavy metals in sewage sludge – Zinc (Zn), Copper (Cu), Lead (Pb), Mercury (Hg), Chromium (Cr), Nickel (Ni), Arsenic (As), Cadmium (Cd) were studied. The treatment effect of these containments was comprehensively assessed using the absolute niche fitness model, the relative niche model and the spatial niche fitness model. All three models showed that Pb > Cu > Ni > Hg > Cd > Cr > Zn > As in the samples. However, they produced – different numerical values – the absolute niche suitability model < the spatial niche suitability model < and the relative niche suitability model. Therefore, we concluded that special attention should be paid to the carcinogenic risk of As and Cr heavy metals to the person exposed to the sewage sludge.
Źródło:
Rocznik Ochrona Środowiska; 2022, 24; 276--293
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges of the Republic of Serbia in the treatment of waste sludge contaminated with heavy metals
Autorzy:
Prokic, Dunja
Stepanov, Jasna
Stojic, Natasa
Curcic, Ljiljana
Powiązania:
https://bibliotekanauki.pl/articles/2171835.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge
heavy metals
Republic of Serbia
EU policy
wastewater treatment plant
osad ściekowy
metale ciężkie
Serbia
polityka UE
oczyszczalnia ścieków
Opis:
The interactions of heavy metals and cement phases in the solidification/stabilization (S/S) process have been examined. The S/S method was applied to the waste sludge contaminated with heavy metals to determine the conditions under which the treated materials can be safely disposed of at landfills for inert, non-hazardous, or hazardous waste. Sludge samples were mixed with soil and sand to simulate improper sludge disposal directly into the soil. S/S technology was selected using different cement fractions to treat these contaminated samples. The use of Portland cement or mixtures of different types of cement for the treatment of sludge containing heavy metals is widespread. Samples of leached content were analyzed for the presence of the following metals: arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), and zinc (Zn). The study results lead to the conclusion that the sludge contaminated with heavy metals after the application of S/S with the addition of different cement fractions is transformed into non-hazardous, monolithic material.
Źródło:
Environment Protection Engineering; 2022, 48, 3; 39--52
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization Sludge from Drying Area and Sludge Drying Bed in Sludge Treatment Plant Surabaya City for Waste to Energy Approach
Autorzy:
Septiariva, Iva Yenis
Suryawan, I Wayan Koko
Zahra, Nurulbaiti Listyendah
Putri, Yika Nabila Kharisma
Sarwono, Ariyanti
Qonitan, Fatimah Dinan
Lim, Jun Wei
Powiązania:
https://bibliotekanauki.pl/articles/2173266.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sludge treatment
surabaya city
SDB
sludge drying bed
DA
drying area
energy
Opis:
The Sludge Treatment Plant (STP) in Surabaya produces solid waste in the form of sludge. The STP in Surabaya provides for Solid Separation Chamber (SSC), equalization unit, Oxidation Ditch (OD), final clarifier, distribution unit, polishing pond, sludge Drying Area (DA), Sludge Drying Bed (SDB), and reservoirs. Sludge waste generation is usually collected in DA and SDB units. This sludge is usually reprocessed for the recycling process, one of which is the waste to energy conversion with a thermochemical process. The difference between these two units is that DA is the sludge from preliminary treatment, while SDB is the sludge from secondary treatment, usually producing microbial biomass. This study aimed to evaluate the sludge produced by the two processing units as solid fuel. The water content of the DA sample is lower because the DA unit has mechanical processing, which separates solids from water. The results of the proximate test resulted in a significant difference between the SDB and DA units. The caloric value, water, ash, and fixed carbon values are significant (<0.05), while the volatile values differ for DA and SBD units. This shows that different treatment is needed for each unit to be appropriately processed as fuel.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 268--275
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climate-neutral waste management in The Russian Federation: New approach to sludge treatment on drying beds under climate change
Autorzy:
Dregulo, Andrey Mikhailovich
Powiązania:
https://bibliotekanauki.pl/articles/2073725.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
climate change
drying bed
precipitations
sludge treatment
Opis:
Identification and ecological diagnostics of the influence of basic load parameters (the cumulative effect of air temperature, the amount of precipitation) is a fundamental aspect of the wastewater sludge treatment at drying beds. The positive dynamics of atmospheric precipitation and the long-term functioning of natural and technical systems for wastewater sludge treatment under the influence of excessive atmospheric moisture does not allow the treatment/drying of precipitation, which provokes soil pollution with subsequent diffusion of pollutants into groundwater, which leads to the degradation of the natural environment components interacting with drying beds. The article is devoted to the adaptation of the process of treatment/drying of wastewater sludge at drying beds. The method includes identification of the dynamics of climatic factors of a long-term chronological series, which makes it possible to predict the effect of atmospheric precipitation on the wastewater sludge drying. The costs for the implementation and subsequent use of the proposed method are absent or insignificant (in the conditions of an increase in usable area during the modernisation of existing drying beds) in comparison with the costs of well-known and widespread methods of deliquefaction.
Źródło:
Journal of Water and Land Development; 2022, 52; 95--100
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Physicochemical and Bacteriological Quality of Treated Wastewater by the New Aourir Plant (Southwestern of Morocco) Using Activated Sludge Technology in a Semi-Arid Region
Autorzy:
Hajji, Sara
Ait Alla, Aicha
Noureddine, Slimani
Haddad, Mohamed Ben
Moukrim, Abdellatif
Powiązania:
https://bibliotekanauki.pl/articles/1838386.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater
Morocco
physicochemical parameter
activated sludge
Aourir
bacteriological parameter
treatment plant
Opis:
In order to use the purified wastewater for the irrigation of a golf course in the Taghazout area (Southwestern of Morocco), this study was conducted to evaluate the physicochemical and bacteriological quality of the treated wastewater in the new Aourir plant (Activated Sludge technology). In order to achieve these objectives, three types of water were analyzed: raw water (RW), biologically treated water (BTW) and water treated by ultraviolet radiation (UV-TW). The physicochemical parameters analyzed were Temperature, pH, Electrical Conductivity (EC), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), five-day Biological Oxygen Demand (BOD5), Total Suspended Solids (SS), Nitrate (NO3), and Orthophosphates (PO4). Otherwise, the analyzed biological parameters are Total Coliforms (TC), Fecal Coliforms (FC), Escherichia coli (E. coli), and Fecal Streptococci (FS). The physicochemical parameters showed that temperature is always lower than 30°C, the pH is close to neutrality and a strong fluctuation of the high electrical conductivity (2700 μS/cm) occurs in UV-TW. At all stages of wastewater treatment, COD, BOD5, SS, NO3 and PO4 were below the limit values recommended by Moroccan standards. The bacteriological results showed a high level of bacterial contamination in RW and BTW, but in UV-TW the loads did not exceed 3 log10. The average loads of TC, FC, E. coli and FC in UV-TW were 2.13, 1.67, 1.77, and 2 (log10 CFU/100ml) respectively. Activated sludge treatment combined with UV has demonstrated sufficient quality to reuse treated water in irrigation; however, the UV treatment requires control to avoid any effect on the microbiological and physicochemical quality of green spaces and groundwater.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 83-98
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Physicochemical and Bacteriological Quality of Treated Wastewater by the New Aourir Plant (Southwestern of Morocco) Using Activated Sludge Technology in a Semi-Arid Region
Autorzy:
Hajji, Sara
Ait Alla, Aicha
Noureddine, Slimani
Haddad, Mohamed Ben
Moukrim, Abdellatif
Powiązania:
https://bibliotekanauki.pl/articles/1838277.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater
Morocco
physicochemical parameter
activated sludge
Aourir
bacteriological parameter
treatment plant
Opis:
In order to use the purified wastewater for the irrigation of a golf course in the Taghazout area (Southwestern of Morocco), this study was conducted to evaluate the physicochemical and bacteriological quality of the treated wastewater in the new Aourir plant (Activated Sludge technology). In order to achieve these objectives, three types of water were analyzed: raw water (RW), biologically treated water (BTW) and water treated by ultraviolet radiation (UV-TW). The physicochemical parameters analyzed were Temperature, pH, Electrical Conductivity (EC), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), five-day Biological Oxygen Demand (BOD5), Total Suspended Solids (SS), Nitrate (NO3), and Orthophosphates (PO4). Otherwise, the analyzed biological parameters are Total Coliforms (TC), Fecal Coliforms (FC), Escherichia coli (E. coli), and Fecal Streptococci (FS). The physicochemical parameters showed that temperature is always lower than 30°C, the pH is close to neutrality and a strong fluctuation of the high electrical conductivity (2700 μS/cm) occurs in UV-TW. At all stages of wastewater treatment, COD, BOD5, SS, NO3 and PO4 were below the limit values recommended by Moroccan standards. The bacteriological results showed a high level of bacterial contamination in RW and BTW, but in UV-TW the loads did not exceed 3 log10. The average loads of TC, FC, E. coli and FC in UV-TW were 2.13, 1.67, 1.77, and 2 (log10 CFU/100ml) respectively. Activated sludge treatment combined with UV has demonstrated sufficient quality to reuse treated water in irrigation; however, the UV treatment requires control to avoid any effect on the microbiological and physicochemical quality of green spaces and groundwater.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 83-98
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of extraction methods to assess the immobilization of metals in hardening slurries
Ocena immobilizacji metali ciężkich w zawiesinach twardniejących
Autorzy:
Falaciński, Paweł
Wojtkowska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2073784.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hardening slurry
cut-off wall
sewage sludge
thermal treatment
immobilization of metals
szlam twardniejący
osad ściekowy
obróbka termiczna
immobilizacja metali
Opis:
In Poland, in recent years, there has been a rapid accumulation of sewage sludge – a by-product in the treatment of urban wastewater. This has come about as a result of infrastructure renewal, specifically, the construction of modern sewage treatment plants. The more stringent regulations and strategic goals adopted for modern sewage management have necessitated the application of modern engineering methodology for the disposal of sewage sludge. One approach is incineration. As a consequence, the amount of fly ash resulting from the thermal treatment of municipal sewage sludge has grown significantly. Hence, intensive work is in progress for environmentally safe management of this type of waste. The aim of the experiment was to evaluate the possibility of using the fly ash that results from municipal sewage sludge thermal treatment (SSTT) as an additive to hardening slurries. The article presents the technological and functional parameters of hardening slurries with an addition of fly ash obtained by SSTT. Moreover, the usefulness of these slurries is analyzed on the basis of their basic properties, i.e., density, contractual viscosity, water separation, structural strength, volumetric density, hydraulic conductivity, compressive and tensile strength. The research on technological and functional properties was carried out, the aim of which was to determine the practical usefulness of the hardening slurries used in the experiment. Subsequently, leaching tests were performed for heavy metals in the components, the structure of the hardening slurries. An experiment showed leaching of hazardous compounds at a level allowing their practical application. The article presents the potential uses of fly ash from SSTT in hardening slurry technology.
W ostatnich latach, w Polsce, odnotowano dość szybki wzrost wytwarzania ubocznych produktów w procesie oczyszczania ścieków komunalnych – osadów ściekowych. W roku 2014 wytworzono 556,0 tys. ton suchej masy komunalnych osadów ściekowych. Jest to pochodna rozwoju cywilizacyjnego Polski i budowy nowoczesnych oczyszczalni ścieków. Zaostrzające się przepisy oraz założone, strategiczne cele gospodarki ściekowej determinują rozwój nowoczesnych metod utylizacji osadów ściekowych. Należą do nich techniki termiczne. W wyniku stosowania tych metod ilość powstałych lotnych popiołów po spaleniu komunalnych osadów ściekowych znacząco rośnie. Trwają intensywne prace nad możliwością bezpiecznego dla środowiska zagospodarowania tego typu odpadu. W artykule przedstawiono badania nad możliwością dodawania lotnych popiołów z TPOŚ jako składnika zawiesin twardniejących. Przeprowadzono badania właściwości technologicznych i użytkowych, których celem było określenie praktycznej przydatności zastosowanych w eksperymencie zawiesin twardniejących. Wykonano badania wymywalności metali ciężkich ze struktury zawiesin. Przeprowadzony eksperyment ekstrakcji metali wykazał wymywanie niebezpiecznych związków na poziomie umożliwiającym praktyczne ich zastosowanie. Przeprowadzone analizy wskazują na potencjalne możliwości wykorzystania ubocznego produktu spalania jakim jest popiół.
Źródło:
Archives of Environmental Protection; 2021, 47, 3; 60--70
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 153

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