Temat: drinking water - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Performance of Conventional Drinking Water Treatment Plants in Removing Microplastics in East Java, Indonesia
Autorzy:: Radityaningrum, Arlini Dyah
Trihadiningrum, Yulinah
Soedjono, Eddy Setiadi
Powiązania:: https://bibliotekanauki.pl/articles/24201748.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water
microplastic
removal efficiency
water treatment
Opis:: Microplastic (MP) has been a new emerging contaminant in the municipal water supply. A water treatment process is a key to producing high-quality and safe drinking water. The performance of a conventional drinking water treatment plant (CDWTP) to remove MPs is questionable. This research aimed to investigate the performance of 2 CDWTPs in East Java in removing MPs. Full-stage treatment in two CDWTPs consisted of intake, pre-sedimentation, coagulation-flocculation, sedimentation, sand filter, and disinfection units. Five L water samples were collected with a grab sampling technique in the sampling points of intake and outlet of each water treatment unit. MP abundance and characteristics in each sample were determined using a Sunshine SZM-45T-B1 stereomicroscope and a Nicolet i10 FTIR spectrophotometer. Total MP removal efficiencies in CDWTPs I and II were 66 and 62%, respectively. The coagulation-flocculation unit performed the highest MP removal efficiencies (56%). The MP with 1–350 μm size achieved lower removal efficiencies (33–53%) than that with 351-<5,000 μm size (53–76%). The removal efficiencies of fiber, fragment, and film in the CDWTPs were 61–65%; 86–100%; and 100%, respectively.
Źródło:: Journal of Ecological Engineering; 2023, 24, 6; 129--143
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Use of Membrane Technologies of the CWTP to Obtain Quality Drinking Water
Autorzy:: Yelemanova, Aliya
Aliyarova, Madina
Begimbetova, Ainur
Jangaskina, Alina
Temirbekova, Marzhan
Powiązania:: https://bibliotekanauki.pl/articles/1955477.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water
ultrafiltration
nanofiltration
ultraviolet disinfection
Opis:: The purpose of the study is a scientific and theoretical substantiation of the energy characteristics of ultra and nano filtration, which directly depend on the quality of the source water, to ensure reliable and uninterrupted operation of a combined water treatment plant (CWTP), to obtain high-quality drinking water in water supply systems intended for settlements and industrial facilities. The developed method of combined operation of a water treatment plant is based on membrane technology, the efficiency of which directly depends on the preliminary improvement of the quality of purified low-mineralized water using an energy-efficient membrane, post-treatment and subsequent disinfection. Indicators of the quality of treated water that meet regulatory requirements and indicators of improving the energy efficiency of the water treatment plant have been investigated and calculated on the basis of experimental data. The results of studies on low-mineralized water made it possible to obtain TDS (Total dissolved solids) with a total residual concentration of hardness and chlorides in the range of 0.77 mg/dm3 without any problems. The proposed combined water treatment plant method is a priority among fundamental and applied works in the field of water treatment, it is intended for the purification of natural waters under conditions of increased anthropogenic loads on natural water sources.
Źródło:: Journal of Ecological Engineering; 2021, 22, 8; 103-110
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Recovery of Alum from Surabaya Water Treatment Sludge using Electrolysis with Carbon-Silver Electrodes
Autorzy:: Barakwan, Rizkiy Amaliyah
Hardina, Tyta Try
Trihadiningrum, Yulinah
Bagastyo, Arseto Yekti
Powiązania:: https://bibliotekanauki.pl/articles/123042.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: alum
drinking water
electrolysis
recovery
sludge
Opis:: Untreated alum sludge from Surabaya water treatment plant (WTP), which contained high concentration of alum was directly discharged into Surabaya River. It might cause problems because of the accumulation of aluminum in the lower part of the river. Alum could be recovered from the drinking water sludge using the electrolysis method. Aims of this study were to determine the optimum pH and electrical current for electrolysis using carbon-silver electrodes to recover aluminum coagulant from the sludge, and to determine the amount of the recovered alum. The sludge was acidified prior to electrolysis. Acidification was done by adding sulfuric acid at pH 3 and 4. Polarization test was conducted at 100, 200, and 300 mA, in order to determine the optimum electrical current. The electrolysis was performed in one compartment batch recirculation reactor, using silver as cathode and carbon as anode for 10 hours. Values of pH were measured every hour. The precipitated matter in the cathode was weighed, and analysed by means of Inductively Coupled Plasma. The optimum conditions of the electrolysis were achieved at initial pH 3 and electrical current 300 mA. The electrolysis resulted in the highest precipitate of 2.6112 g in the cathode.
Źródło:: Journal of Ecological Engineering; 2019, 20, 7; 126-133
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ecological Characteristics of Groundwater in Rural Areas of the Karaganda Region
Autorzy:: Shamshedenova, Samal
Beisenova, Raikhan
Rakhymzhan, Zhanar
Zhaznaeva, Zhanat
Syzdykova, Nazym
Tazitdinova, Rumiya
Khanturin, Marat
Powiązania:: https://bibliotekanauki.pl/articles/123381.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water
water quality
bacterial pollution
groundwater
environmental characteristics
Opis:: In this article, the purpose of the research was to study the ecological characteristics of groundwater and central water supply used for drinking and economic activity of the Kievka village. The hydrochemical indicators of the samples were determined with conventional methods, and performed on 16 indicators: pH, electrical conductivity, suspended solids, dry residue, chlorides, sulfates, phosphates, total hardness, sodium, ammonium nitrogen, nitrites, nitrates, chemical oxygen consumption (COD), anionic surfactants (APAS), total iron, and manganese. While assessing the hydrochemical state of drinking water in the village of Kievka, it can be noted the "Altyn-dan" kindergarten and the Kiev secondary school No. 3, exceed the MAC which is determined by certain indicators. As a result of microbiological studies of the water samples from the village of Kievka, it was revealed that the total microbial number is normal. It was determined that a different number of fungi and actinomycites were present in all samples. At the initial concentration, a large concentration of fungi was observed in all samples.
Źródło:: Journal of Ecological Engineering; 2019, 20, 11; 67-75
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Assessment and Physicochemical Characterization of Groundwater Quality for Irrigation and Drinking Purposes in Bazer Sakhra (Eastern Area of Algeria)
Autorzy:: Bounab, Samia
Khemmoudj, Kaddour
Sedrati, Nassima
Powiązania:: https://bibliotekanauki.pl/articles/2173296.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: groundwater
drinking water
irrigation water
water quality index
hydrochemical facies
Opis:: Twenty groundwater samples were collected and then examined for physical (pH, EC, TDS) and chemical (Na+, K+, Ca2+, Mg2+, HCO3−, Cl−, SO42−, NO3) parameters, followed by multivariate statistics to determine the current state of groundwater quality and to assess the suitability of these resources for drinking and irrigation purposes in the Baser Sakhra area localized in Eastern of Algeria. The analysis carried out showed that the cations trend in most of the groundwater samples is on the order of Ca2+˃Na+˃Mg2+˃K+ and the anions trend is on the order of HCO3-˃SO42-˃Cl-. Stabler diagram demonstrated the predominance of Ca2+- HCO3- hydro-chemical facies (80%). Moreover, the parameters, such as sodium adsorption ratio, percentage sodium, residual sodium carbonate, permeability index, Kelly’s ratio, potential salinity, and magnesium hazard were evaluated for the suitability of groundwater for irrigation. The values obtained in this investigation concluded that most of the groundwater samples are suitable for irrigation. From the other approach, the Water Quality Index (WQI) for drinking was also used in the current study. WQI ranged from 72.46 to 506.426, indicating that 40% of the samples were suitable for drinking however, 60% of them belong to the poor to unsuitable category of drinking water in terms of physicochemical properties, according to the World Health Organization norms.
Źródło:: Journal of Ecological Engineering; 2022, 23, 8; 119--132
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Groundwater Contamination and Health Risk Evaluation of Naturally Occurring Potential Toxic Metals of Hatiya Island, Bangladesh
Autorzy:: Rahman, Mahfuzur
Khan, Md. Sadril Islam
Hossain, Mohammad Sabbir
Hossain, Md. Imam Shohel
Hasan, Mahmudul
Hamli, Hadi
Mustafa, M. Golam
Powiązania:: https://bibliotekanauki.pl/articles/2105279.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water
toxic elements
pollution indices
Hatiya Island
Opis:: Groundwater meets the majority portion of drinking water needs, particularly in the rural area of Bangladesh. Groundwater has been continuously contaminated by potentially harmful metals as a result of natural processes as well as some anthropogenic activities, creating a variety of health impacts. The current research aimed to evaluate the naturally occurring level of metal contamination and the human health risk associated with deep groundwater in the Hatiya Island. Because of the arsenic, iron, and salinity problem in shallow groundwater, the inhabitants of the Hatiya Island use deep groundwater. During the field investigation, no shallow tubewells were observed; therefore, only deep groundwater samples were collected. The total sample size collected throughout the Hatiya island was 17. Five metals (Zn, Fe, Mg, Mn, and Cu) were analyzed using an Atomic Absorption Spectrophotometer (AAS). The concentrations of studied potential risky metals were ranked as follows: Mg > Zn > Fe >Mn> Cu. The detected values of all metals except Fe were found within the drinking water limits of WHO (2017), BIS (2012), and BDWS (1997), where only 29.41% of the Fe sample exceeded the standard drinking limits. According to the metal evaluation index (MEI) and degree of contamination (Cd), the groundwater of the study area is free from contamination but the metal pollution index (MPI) and nemerow pollution index (NI) exhibited little pollution in the mid-western part of the study area. The hazard quotient (HQ) values revealed no oral and dermal health risk for individual metals (Cu, Zn, Fe, Mn). On the other hand, the hazard index (HI) values exhibited no risk for combined metals as none of the values exceeded the safety limit value of 1. According to the HQ and HI results, the deep groundwater on Hatiya Island is non-carcinogenic and risk-free for children and adults. However, children were more susceptible to oral health risks than adults. In contrast, adults were more vulnerable to dermal health risks than children.
Źródło:: Journal of Ecological Engineering; 2022, 23, 6; 223--236
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Water management problems at the Bukówka drinking water reservoir’s cross-border basin area in terms of its established functions
Autorzy:: Wiatkowski, M.
Rosik-Dulewska, C.
Powiązania:: https://bibliotekanauki.pl/articles/124624.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water reservoir
water management
cross-border basin area
water quality
Opis:: The paper covers the analysis of water management problems in the cross-border reservoir basin of Bukówka, located at the Bóbr river, at 271+540 km of its course, below the Czech-Polish border, in Dolnośląskie Voivodeship. The problems of water management in the context of the reservoir’s functions have been analyzed; these are: flood control, the provision of water during low water level periods for the Water Treatment Plant in Marciszów, the provision of drinking water for the city of Wałbrzych as well as the provision of proper flow in the Bóbr river bed downstream from the reservoir. Due to its localization right below the border with the Czech Republic, the reservoir is exposed to a number of problems. The study has found that the main problems of water management in the basin area included unsatisfactory state of water and wastewater management in the basin, unsatisfactory state of the surface water quality in the basin area of the reservoir, poor condition of streams and drainage ditches, improper arrangement of arable lands and large downslopes and a lack of monitoring stations on tributaries of the reservoir. It has been found that the hydrochemical conditions in the Bukówka reservoir’s section are unfavorable for it. From the eutrophication point of view, the water flowing into the tank is characterized by a large content of nutrients, especially nitrates, phosphates and BOD₅. In order to counteract eutrophication it is necessary to lower the concentration of nutrients in the water flowing into the tank. One of the basic ways to do so is to restore the water and wastewater management in the reservoir’s basin. Studies in the Bukówka reservoir provide important information concerning the state of the purity of the water supplying the reservoir. In order to obtain accurate information on the state of purity, a monitoring of hydrological and water quality should be continued. The studies are a part of the strategy of protection of the quality of transboundary waters, proposed in the Convention on the Protection and Use of Transboundary Watercourses and International Lakes of 1992.
Źródło:: Journal of Ecological Engineering; 2015, 16, 2; 52-60
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Assessment and Mapping of Groundwater Quality for Irrigation and Drinking in a Semi-Arid Area in Algeria
Autorzy:: Azlaoui, Mohamed
Zeddouri, Aziez
Haied, Nadjib
Nezli, Imed Eddine
Foufou, Atif
Powiązania:: https://bibliotekanauki.pl/articles/1955501.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: groundwater
drinking water
WQI
irrigation water
SAR
plain of Ain Oussera
Opis:: Groundwater is the main resource used to meet the people’s drinking water and irrigation needs of the Ain Oussera plain, because of the lack of surface-water resources. This paper intended to evaluate the suitability of groundwater for agriculture and drinking in the Ain Oussera plains. The data of the study were gathered and analyzed from twenty (20) groundwater samples collected to assess the plain groundwater quality, using the Water Quality Index (WQI) and GIS, carried out on physico-chemical parameters, including potential of hydrogen (pH), total dissolved solids (TDS) electrical conductivity (EC), potassium (K+), sodium (Na+), magnesium (Mg2+), and calcium (Ca2+) and major anions (Cl, HCO3, NO3, SO4), as well as, the water suitability test for agricultural purposes, using the sodium adsorption ratio. These parameters were inserted into the GIS platform to create a spatial distribution map for each parameter using the inverse interpolation technique (IDW). The results indicated that the concentrations are within the Algerian permissible limits. The water quality index (WQI), which evaluates the suitability of water for consumption, varies from 31 to 173 with an average value of 81. 70% of the samples from the Ain Oussera plain fall within the excellent and good quality categories. Its water is suitable for consumption (WQI < 100), while 30% is in the poor water category. From the calculation of SAR values, it was found that 90% of the groundwater samples are considered excellent and suitable for irrigation. According to the classification of the United States Salinity Laboratory USSL, the Ain Oussera water quality is classified as poor for irrigation purposes.
Źródło:: Journal of Ecological Engineering; 2021, 22, 8; 19-32
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Assessing Groundwater Quality for Drinking Purpose in Jordan: Application of Water Quality Index
Autorzy:: Ibrahim, Mohamad Najib
Powiązania:: https://bibliotekanauki.pl/articles/124859.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water quality index
groundwater quality
drinking water
Escherichia coli
hydrochemistry
Jordan
Opis:: Groundwater is a key source of drinking water in Jordan. This study was conducted to assess the suitability of groundwater in major groundwater basins in Jordan for drinking purposes. The groundwater quality data from sixteen sampling stations within one-year-monitoring period from March 2015 to February 2016 were used. Weighted arithmetic water quality index (WQI) with respect to the Jordanian standards for drinking water was used for quality assessment. Sixteen Physical, chemical and microbiological parameters were selected to calculate WQI. The result showed that all physical and chemical parameters were almost below the maximum allowable level based on the Jordanian standards for drinking. On the other hand, the microbiological parameter (i.e. E.coli count) was exceeded the maximum allowable limit in all the studied locations based on the Jordanian standards for drinking water. The computed WQI values range from 40 to 4295. Therefore, out of 16 studied locations, three locations are classified in the “Excellent water” class, nine locations as a “Good water” class, one as a “Poor water” class, two as a “very poor water” class, and one as a “water unsuitable for drinking purpose” class. Furthermore, Escherichia coli is considered the most effective parameter on the determination of WQI in this study. This result highlighted the importance of including the microbiological parameters in any drinking water assessment, since they reflect with other physical and chemical parameters the actual condition of water quality for different purposes.
Źródło:: Journal of Ecological Engineering; 2019, 20, 3; 101-111
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Characterization of Biofilms From Selected Synthetic Materials Used in Water Distribution System
Autorzy:: Biedroń, I.
Traczewska, T.
Konieczny, T.
Płaza, G.
Powiązania:: https://bibliotekanauki.pl/articles/952367.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: biofilm
metabolic profile
drinking water
bacteria consortia
phenotypic microarray
PM
Opis:: Materials like polyvinyl chloride (PVC), polypropylene (PP), ultra high molecular weight polyethylene (UHMW-PE) are used for the construction of drinking water supply systems. It was found that regardless of the type of material the distribution network is built of, microorganisms formed biofilms on every available surface. The pipes material plays a key role in terms of biofilm formation. Important factors are the surface roughness, adhesives, plasticizers, stabilizers, which can be a source of nutrients for bacteria. The metabolic activity of microorganisms on polymer materials, induces migration of compounds from the material into water. The aim of this study was to present the differences in the structure and the metabolic profile of biofilm formed on the technical materials.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 284-293
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Physicochemical and Bacteriological Status of Surface Waters and Groundwater in the Selected Catchment Area of the Dunajec River Basin
Autorzy:: Nowobilska-Luberda, A.
Powiązania:: https://bibliotekanauki.pl/articles/124164.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: groundwater intakes
drinking water
water quality indicators
surface waters
Dunajec catchment area
Opis:: The aim of the study was to assess the qualitative status of groundwater and surface water abstracted for the needs of customers in the city of Nowy Targ. The assessment was based on the results of physicochemical analyses of 62 water samples taken from the water intake on the Biały Dunajec stream in Szaflary (emergency water intake) and 280 samples taken from 6 active groundwater intakes in Nowy Targ. The basic descriptive statistics of manganese, iron, magnesium, calcium, chlorides, sulphates, phosphates, phosphates, ammonia, nitrites, nitrites, nitrates, chromium, zinc, indicators such as: dissolved oxygen, BOD5, suspension, phenols, PUR, pH, total hardness, alkalinity and number of coli bacteria were determined. The water analyses were performed in the period 2004-2016. Basic descriptive statistics of manganese, iron, magnesium, magnesium, calcium, chlorides, sulphates, phosphates, ammonia, nitrites, nitrates, chromium and zinc ions, as well as such indicators as: dissolved oxygen, BOD5, suspension, phenols, PEW, pH, total hardness, alkalinity and number of coli bacteria were determined. The quality of the captured waters was classified on the basis of the results obtained, noting that the water from the Biały Dunajec stream corresponds to the A3 purity category due to the microbiological contamination. According to the physicochemical standard, A3 category was also determined on the basis of the phenol concentration, which, however, decreased significantly since 2013, corresponding to category A1. For groundwater, on the other hand, it was established that all analysed indicators corresponded to class I purity grade, i.e. water of a very good quality. The only excess over the values corresponding to this class was recorded for calcium ions, but the classification of water quality has not changed due to the fact that it was caused by natural processes. Taking into account the above-mentioned findings, it was concluded that due to the very good groundwater quality, their intakes should be left as the main source of water for consumers in Nowy Targ, while the surface water intake on the Biały Dunajec stream should be maintained concurrently as an emergency intake.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 162-169
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: The Study of Adsorption Ability of Natural Materials of the Tyumen Region
Autorzy:: Pimneva, L.
Zagorskaya, A.
Powiązania:: https://bibliotekanauki.pl/articles/123127.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: natural sorbent
copper ions
adsorption isotherms
water supply system
drinking water quality
Opis:: The sorption of divalent copper, natural sorbents of kaolinite and montmorillonite clays and carbon sorbent was studied on model solutions under static conditions. Quantitative characteristics of sorption process of copper ions were obtained. The degree of extraction of copper ions from solution was investigated, depending on the concentration of the initial solution and the weight ratio of the sorbent and volume of treated solution. The magnitude of sorption increases along with the increase in the volume of copper sulfate solution with a concentration of 0.02 M at a constant sample of sorbents. A higher carbon sorption capacity of the sorbent, in relation to ions of copper, was compared to kaolinite and montmorillonite clay. A higher sorption capacity of the carbon sorbent with respect to copper ions is established in the comparison with kaolinite and montmorillonite clay.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 225-228
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Comparative Study of Iron Removal from Groundwater Using Low Cost Adsorbents
Autorzy:: Raheem, Shahad A.
Kadhim, Entidhar Jawad
Abdulhasan, Maryam Jawad
Powiązania:: https://bibliotekanauki.pl/articles/2202201.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: groundwater contamination
iron removal
adsorption
filtration
drinking water
sawdust
barley husk
Opis:: Iron is one of the groundwater contaminants that negatively impact health and the environment. This study is attempted at introducing low cost natural adsorbent for that adsorbs iron from synthetically prepared iron water. Sawdust and barley husks were used as a filter media, either alone or at different mixing ratio of sawdust/barley husks (1:1, 0.5:1, 1:0.5), to study the effect of adsorbent dose on the removal efficiency. Synthetic water of iron was used at different initial concentrations (10, 25, 40, 65, and 80) mg/L to study the effect of initial iron concentration on the removal efficiency. The filtration process was conducted at a surface loading rate of 3 m3/m2.hr. The results showed higher removal efficiency with the increase of iron initial concentration. The results indicated that removal of iron ranged (90–99.34%) for all types of filter media. The best removal was found to be 99.34% at a mixing ratio of 0.5:1 (sawdust/barley husks) at 80 mg/L initial concentration. As a conclusion, Removal of iron was very successfully observed with absorbent materials sawdust and barley husk, which makes the treatment of iron even possible in rural areas and when high concentration of iron is present.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 18--23
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Thermodynamic Analysis and Mathematic Modeling of Waste Sludge from Drinking Water Treatment Plants
Autorzy:: Azeddine, Fantasse
El Khadir, Lakhal
Ali, Idlimam
Powiązania:: https://bibliotekanauki.pl/articles/2026746.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: drinking water sludge
sludge valorization
wastewater management
thermodynamic analysis
isosteric heat
Opis:: Water treatment annually produces a huge amount of Drinking Water Treatment Sludge (DWTS) wastes. The latter causes environmental problems in Morocco in terms of energy and pollution. Therefore, cost-effective and eco-friendly solutions for managing them should be proposed in order to reduce the frequency of storage along with transportation costs. In this paper, a thermodynamic analysis of DWTS wastes was conducted based on the isosteric heat and compensation theory. Different results concerning the mineralogical identification of sludges were established. Findings revealed that the by-product of water purification was mainly composed of aluminum, silica and iron hydroxides, with pH varying between 6.23 and 6.85. The suspended matter was between 18.3 and 19.6 m/l. The volatile matter of the three sludge samples was between 18 and 21%. The measured dry matter content was between 13.41 and 15.23%. The experimental tests were performed under temperatures from 45 and 60 °C, the experimental data of the sorption curves were fitted by using several models of correlation. Furthermore, the analysis showed that the Peleg’s model perfectly described the isotherm curves in the activities ranging from 0 to 90%. The net isosteric heats of sorption of the three hydroxide sludge from the Moroccan treatment station: $S_k$, $S_m$ and $S_s$, were determined for desorption and adsorption. Moreover, it was revealed that the equilibrium water content rising lead contributed to the reduction of the net isosteric heat and the entropy of sorption. Finally, the enthalpy-entropy compensation showed that the sorption mechanism involved was enthalpy driven.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 140-149
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Bacteriological Quality Status of Spring Waters from the Taanzoult Plain (Aguelmam Sidi Ali Wetland, Morocco)
Autorzy:: Sammoudi, Rachid
Chahlaoui, Abdelkader
Ouarrak, Khadija
Taha, Imane
Khaffou, Mhamed
Powiązania:: https://bibliotekanauki.pl/articles/24201718.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: bacteriology
spring water
drinking water
livestock watering
water quality
Taanzoult plain
Aguelmam Sidi Ali wetland
Morocco
Opis:: The Taanzoult plain of Aguelmam Sidi Ali wetland contains several permanent springs of water. They are intended for watering livestock, supplying drinking water and hydrotherapy. Nevertheless, the water consumption from sources in the raw state, without any pre-treatment or hygienic measures, certainly threatens the health of humans and particularly that of traditional medicine patients. From this perspective, the present work is based on a monthly monitoring of eight bacterial germs in the waters of four sources (Aghbalou Aberchane, Aghbalou Dkhiss, Aghbalou Akjdate and forestry post) during a hydrobiological cycle of 12 months from January to December 2017. The results of analyses have shown that bacterial contamination is significant at the water sources, used mainly for watering livestock, compared to those dedicated to drinking and hydrotherapy. The mean content of total coliforms and fecal coliforms at all the stations are higher than the Moroccan standards for surface water intended for the drinking water production. Except for the wet period for Aghbalou Aberchane and Aghbalou Dkhiss waters, the value of the bacterial parameters studied are higher than the Moroccan standards. In general, the anarchic frequentation of the area negatively influences the water quality and compromises its potability. Consequently, it directly threatens the health of users and hydrotherapy patients, especially during the dry season. These findings could call on the health authorities and the competent authorities responsible for controlling the quality of surface water to make users aware of the health risks and provide for appropriate arrangements to improve the quality of the widely sought-after natural waters.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 184--191
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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