Temat: lagoon - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Distribution and Seasonal Variation of Heavy Metals in Sediments of Muthupet Lagoon, Southeast Coast of India
Autorzy:: Balakrishnan, T.
Sundaramanickam, A.
Shekhar, S.
Balasubramanian, T.
Powiązania:: https://bibliotekanauki.pl/articles/125289.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: seasonal variation
heavy metals
Muthupet lagoon
Opis:: This study deals with seasonal variation of heavy metals in sediments of Muthupet lagoon, Southeast coast of India from September 2011 to August 2012. The bulk sediments were association with sand, silt and clay. Geoaccumulation index (lgeo) was used to quantitatively assess the influences of heavy metal pollution. Heavy metals were determined by using Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) and the results were compared to permissible limits of WHO/USEPA. The minimum concentration of heavy metals in all the stations were found during the post monsoon and summer seasons and the maximum concentration of heavy metals in all the stations were found during the premonsoon and monsoon seasons. The reason for the pollution was land drainage, irrigation through channels and municipal wastes and also the peak agricultural activities due to the release of fresh water from reservoirs. Among all the metals iron was found to be maximum in all the stations in postmonsoon and summer season followed by magnesium and manganese. Apart from these three metal, all other six metals are recorded in moderate range. The reason for the high concentration of these metals are anthropogenic activity, agriculture, aquaculture and the rivers regular in and out flow throughout the study duration in the lagoon area.
Źródło:: Journal of Ecological Engineering; 2015, 16, 3; 49-60
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Perspective Technologies of the Treatment of the Wastewaters with High Content of Organic Pollutants and Ammoniacal Nitrogen
Autorzy:: Malovanyy, Myroslav
Moroz, Oleksandr
Hnatush, Svitlana
Maslovska, Olga
Zhuk, Volodymyr
Petrushka, Ihor
Nykyforov, Volodymyr
Sereda, Andriy
Powiązania:: https://bibliotekanauki.pl/articles/124528.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: leachate treatment
aerated lagoon
microbiocenosis
biofuels
wastewater treatment plant
Opis:: The paper analyzes the advanced technologies of wastewater treatment with a high content of organic pollutants and ammonium ions. Two different bi-stage scenarios for the treatment of such effluents are proposed. The first scenario includes the pretreatment in aerated lagoons and the final stage at the wastewater treatment plants after appropriate dilution with municipal sewages. The second scenario also includes the first stage in aerated lagoons with a tertiary treatment at the plant for cyanobacteria cultivation with the use of obtained biomass for biofuels production. The effects of the aeration periodicity on the leachate treatment efficiency and also on the composition of microbiocenosis in the aerated lagoons were investigated. The leachates of the Lviv landfill of municipal solid waste (MSW) were used in experimental investigations. The Lviv landfill of MSW was used for domestic and industrial wastes deposition for almost six decades, since the 1960s. It was found that the highest effect of ammoniacal nitrogen removal was obtained in the mode of periodic aeration, with the cycle duration of two hours including the one-hour aeration. It was found that the microorganisms extracted from the leachates of the Lviv MSW landfill are prospective for the new biotechnologies of treatment of the highly concentrated wastewaters, since this microbiocenosis is resistant to the widespread pollutants, in particular to heavy metal ions.
Źródło:: Journal of Ecological Engineering; 2019, 20, 2; 8-15
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of Variable-Density and Constant-Density Representations of Flow on Simulating Terrestrial Groundwater Discharge into a Coastal Lagoon
Autorzy:: Al-Taliby, Wissam
Dekhn, Hadeel
Powiązania:: https://bibliotekanauki.pl/articles/2028164.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Indian River Lagoon
terrestrial groundwater discharge
variable density
constant density
Opis:: Terrestrial groundwater discharge (TGWD) can be an important pathway for pollutants into coastal water bodies. Thus, a reliable way to quantify it is essential for efficient coastal management practices. This study evaluated the feasibility of using constant-density models for estimating TGWD amounts into the Indian River Lagoon, which is a variable-density estuarine environment. Constant-density models were developed using MODFLOW, while variable-density models were developed using SEAWAT. The numerical models were calibrated to match the field measured head data under the lagoon. The amounts of TGWD into the IRL and hydraulic head distributions calculated by the two codes were compared over eight pairs of numerical experiments. Two of those numerical experiments used the calibrated model and field measured conditions, while the rest of them used modified versions of the calibrated models, including variable anisotropy ratio k, variable lagoon salinity $L_S$, and increased water table elevation by 5%. The results showed that the constant-density model is fairly accurate in estimating TGWD and head distributions at the calibrated k in the range of 1000–20,000 with an error not exceeding 9.4% under the actual measured field conditions. Even when $L_S$ was assumed to increase to ocean salinity value of 1.0, a case that rarely occurs in IRL, the calibrated constant-density model’s accuracy was not affected substantially. However, the constant-density model failed to represent the physics of the variable-density environment at k values lower than 1000, where the error exceeded 129%. Generally, the accuracy of the constant-density model was found to increase substantially at lower $L_S$ and higher water table elevations.
Źródło:: Journal of Ecological Engineering; 2021, 22, 11; 188-197
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Study the Effectiveness of the Natural Lagoons for Removal of Organic Matter, Nutrients and Fecal Coliform from Urban Domestic Wastewater under Arid Climate (Morocco)
Autorzy:: Osmane, Ahmed
Zidan, Khadija
Benaddi, Rabia
Sebah, Imane
Elmouraille, Nadia
Ait Ali, Mustapha
Belmouden, Moustapha
Powiązania:: https://bibliotekanauki.pl/articles/2202383.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: natural lagoon
urban domestic wastewater
organic matter
nutrients
faecal coliforms
Opis:: Morocco is one of the countries most affected by the scarcity of water resources and the poor distribution of rainfall. Natural lagoon is the most widely used treatment process in Morocco. Indeed, Morocco is a sunny country throughout the year. The lagoon system requires minimal effort in operation and maintenance. Moreover, this system is the best process for removing bacteria indicators. For these reasons, a study of the purification performance of natural lagoons during five years, located in Chichaoua region (Morocco) was carried out. The lagoon system was monitored for five years, with measurements taken every three months at the input and output of the system. It received a hydraulic loading rate (HLR) between 1171 and 2760 m3 with an average of 2053 m3/day. The obtained results show the removal of 37% of TSS, 63% of BOD5, 60% of COD, 61% of NH4+, 37% of TP, and 6.5 log units of coliforms during the mentioned monitoring period. Thus, the effluent values do not always comply with the Moroccan water quality requirement for irrigation reuse. Additionally, the statistical analyses confirm the presence of a strong linear correlation between almost all variables in the lagoon output. Therefore, the performance efficiency of the lagoon in removing organic matter and nutrients was significantly (p < 0.05) dependent on the season. However, the fecal contamination was not significantly (p > 0.05) affected by the seasons in this study. At the end of this study a complementary treatment before the reuse of treated wastewater, was proposed.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 196--207
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Use of Microbiocenosis Immobilized on Carrer in Technologies of Biological Treatment of Surface and Wastewater
Autorzy:: Malovanyy, Myroslav
Masikevych, Andrij
Masikevych, Yurij
Blyzniuk, Mykola
Tymchuk, Ivan
Zhuk, Volodymyr
Hnatush, Svitlana
Kharlamova, Olena
Iurchenko, Valentyna
Vlasyk, Leonid
Powiązania:: https://bibliotekanauki.pl/articles/2173371.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: microorganisms
immobilization on carrer
formation of microbiocenosis
periphyton
aerated lagoon
biological treatment
Opis:: The role of fibrous carrer in the formation of microbiocenosis, which provides purification of aquatic environments, was studied. The prospects of using the "Vija" fibrous carrer for cleaning the watercourses of mountainous areas were studied. The species composition, as well as the kinetics of periphyton formation on fibrous carrer, were established. The species composition of the microbiocenosis, which is formed on carrer in the mode of active aeration of landfill filtrates and the prospects of using the method of aerated lagoon for filtrate treatment were studied.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 34--43
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Activated Sludge Technology Combined With Hydroponic Lagoon as a Technology Suitable for Treatment of Wastewater Delivered by Slurry Tanks
Autorzy:: Pawęska, K.
Bawiec, A.
Powiązania:: https://bibliotekanauki.pl/articles/125019.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: activated sludge technology
hydroponic lagoon
wastewater delivered by slurry tanks
wastewater treatment efficiency
Opis:: The paper presents information related to the use of hydrophytic technology combined with traditional activated sludge solution for wastewater treatment in areas without central sewage system. The analyzed wastewater treatment plant (WWTP) was operated in activated sludge technology with a hybrid activated sludge reactor where biomass is kept in a settled and suspended form. Treatment system was completed with a hydroponic lagoon. Hydroponic lagoon has been used as tertiary treatment, in which the self-cleaning processes with the participation of the plant has come to an additional reduction of nutrients. The analyzed three-stage treatment plant is located in the municipality of Nowa Sól. Only domestic wastewater delivered by slurry tanks is treated there in the amount of 60 m³/d. During the observation, high average concentrations of total nitrogen (201.0 mgN/dm³) was observed and organic matter expressed by COD reaching 1341.5 mgO₂/dm³ and BOD5 on the level of 246.3 mgO₂/dm³ were noted. A characteristic feature of the object designed for wastewater treatment delivered by slurry tanks is high irregularity of wastewater supply and high instantaneous loads of pollutants (the system does not provide expansion tank). The biggest inequality factor of the flow to the reactor was observed in December 2014 (Nd=3.9). During the observations days with no inflow of sewage also occurred. The study shows the dynamics of changes in the amount of delivered domestic wastewater and sewage flowing out of the treatment plant including inequality factor. Information about the quality of wastewater was used to determine the reduction of concentrations of pollutants such as organic matter, suspended solids, nitrogen and phosphorus.
Źródło:: Journal of Ecological Engineering; 2017, 18, 2; 29-37
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Environmental study of the seasonal succession of mesozooplankton in a brackish water Odra River estuary during 2003–2005
Autorzy:: Chojnacki, J.C.
Tyluś, K.
Powiązania:: https://bibliotekanauki.pl/articles/123782.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Baltic Sea
II row Odra River estuary (Szczecin Lagoon)
mesozooplankton
annual catch of fish
cormorants
Opis:: The entire estuary water is dominated by the discharge of the River Odra into the Szczecin Lagoon. The water body is brackish and the salinity in the central part ranges 0.5 and 2 PSU. The Lagoon has a long eutrophication history; usually, two phytoplankton biomass peaks are observed: Diatoms in spring and blue-green algae in summer. The recent data on zooplankton is limited. Rotifers and Cladocerans supply the bulk of the zooplankton biomass. The ichtiofauna is composed of fresh and brackish water, migratory and marine species. Zooplankton and water samples were collected during 2003–2005. The results suggest that during 10 season’s climate in Odra River estuary, Cladocera were the dominant group, large impact on the density of mesozooplankton were: Daphnia cucullata and Daphnia longispina, Copepoda played a lesser role in the Odra River estuary than Cladocera. Biomass of mesozooplankton from the Lagoon was significantly higher compared with the biomass of mesozooplankton from Odra River estuary, which could be related to a greater inflow of nutrients into the Lagoon and the increased growth of phytoplankton, which forms an excellent first stage food web for herbivorous and carnivorous zooplankton, and fish and consequently cormorants.
Źródło:: Journal of Ecological Engineering; 2013, 14, 2; 12-25
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

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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