Research on Fluoride Removal from Membranes Rejected Water

2017 ◽  
Author(s):  
Youssef-Amine Boussouga ◽  
Marina Valentukeviciene ◽  
Ramune Zurauskiene
Keyword(s):  
Treatment Cost ◽  
Treatment Plant ◽  
Freundlich Isotherm ◽  
Water Treatment Plant ◽  
Human Consumption ◽  
Fluoride Removal ◽  
Microscopic Technique ◽  
Natural Sorbent ◽  
Sorption Phenomenon ◽  
Fluoride Sorbents

The excess of fluoride in water intended for human consumption can cause some problems in health of consumers from concentrations over than 1.5 mg/L. A detailed study has been carried out for the removal of fluoride from concentrated rejected water overcoming the drawback of membrane processes by using sorption techniques. Opoka mineral which is a natural sorbent and polonite have been chosen and valorized in this present work as fluoride sorbents for rejected water by membranes of the water treatment plant. These sorbents have been selected in order to reduce the treatment cost and to meet the standards of rejected water especially in term of fluoride. Opoka sorbent and polonite have shown effective results for fluoride removal from rejected water with efficiency over than 77%. In order to understand the sorption phenomenon and to validate the results with sorbents, we have applied experimental data on Freundlich Isotherm and SEM microscopic technique.

Adsorption of Ammonium Sulfate Using Fabricated Zeolite from Waste Sludge of Water Treatment Plant

2011 ◽  
Vol 410 ◽  
pp. 220-223
Author(s):  
Kwannate Sombatsompop ◽  
Thun Jeensawak ◽  
Pongsachan Sonpai ◽  
Adithep Wangbooncong ◽  
Jeatana Wongwichien ◽  
...  
Keyword(s):  
Water Treatment ◽  
Adsorption Capacity ◽  
Ammonium Sulfate ◽  
Treatment Plant ◽  
Microscopic Analysis ◽  
Freundlich Isotherm ◽  
Water Treatment Plant ◽  
Maximum Adsorption Capacity ◽  
Electron Microscopic ◽  
Waste Sludge

This work studied an adsorption of ammonium sulfate (NH4)2SO4 from synthesized zeolite, with 3M NaOH at temperature of 90°C for 9 h, from waste sludge of water treatment plant. The scanning electron microscopic analysis revealed that the synthesized zeolite was observed to be cubic in shape. For adsorption capacity, the pH was varied at 4, 5, 6, 7 and 8, the contact times used were 0, 5, 10, 15, 30, 45 and 60 min, and the initial (NH4)2SO4 concentrations used ranged from 60-120 mg/L. The recommended pH and contact time were 8 and 15 min, respectively. Adsorption isotherm for synthesized zeolite was fitted to Langmuir model more effectively than Freundlich model. The K values for Langmuir and Freundlich isotherm was 0.061 and 1.751 L/mg with R2 values of 0.989 and 0.965, respectively. The maximum adsorption capacity was 9.597 mg/g obtained by the Langmuir isotherm. The work has concluded that the fabricated zeolite could successfully be used for adsorption of ammonium sulfate.

scholarly journals Water Treatment Plant Prototype with pH Control Modeled on Fuzzy Logic for Removing Arsenic Using Fe(VI) and Fe(III)

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2834
Author(s):  
Fabricio Paredes Larroca ◽  
Erich Saettone Olschewski ◽  
Javier Quino-Favero ◽  
Jimmy Rosales Huamaní ◽  
José Luis Castillo Sequera
Keyword(s):  
Fuzzy Logic ◽  
Treatment Plant ◽  
Inorganic Arsenic ◽  
Water Treatment Plant ◽  
Ph Control ◽  
Underground Water ◽  
World Health ◽  
Human Consumption ◽  
Average Value ◽  
Fuzzy Control Strategy

This study proposes a fuzzy control strategy embedded in a Siemens IoT2040 gateway developed for removing inorganic arsenic from synthetic underground water in a treatment plant prototype. The prototype is used to dose a constant flow of Fe(VI) to maintain an oxide-reduction potential to guarantee the oxidation of arsenite into arsenate, while the fuzzy logic embedded in the IoT control manages the addition of Fe(III) to achieve a proper pH adjustment and efficient arsenate removal. The tests used synthetic Bangladesh groundwater enriched with 200 µg/L of arsenite and 200 µg/L of arsenate. The results revealed that the plant prototype yielded an effective treatment of the water. Arsenate was decreased to an average value of 6.66 µg/L and, the arsenite concentration decreased to 1.01 µg/L or less. These values were lower than the limit of 10 µg/L deemed by the World Health Organization as safe for human consumption.

scholarly journals Diagnosis, recommendations and optimization for potable water treatment plant in Cauca (Colombia)

2019 ◽  
Vol 20 (4) ◽  
pp. 302-307
Author(s):  
Dustin Stephan Melendez Giraldo
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Human Consumption ◽  
Technical And Economic Analysis ◽  
Treatment Technologies ◽  
Additional Water ◽  
Treatment Facilities

Currently the water supply system in the municipality of Corinto (Cauca) in Colombia provides drinking water to the entire urban and rural population of the municipality. In order to provide drinking water to the entire population, it became necessary to optimize and/or expand the existing water treatment plant. The article presents an assessment of the consideration of two optimization options: the need for reconstruction of existing water treatment facilities or the construction of additional water treatment units. A reasonable proposal was made to expand the station by building additional water treatment units, including advanced modern water treatment technologies, such as coagulation, flocculation, sedimentation, filtration, sorption, settling using thin-layer modules and disinfection, based on the survey (diagnostics), technical and economic analysis, analysis of the efficiency of the existing water treatment plant, taking into account the quality of drinking water preparation, confirmed by the analysis of samples, the results of physical, chemical and microbiological tests, indicating the optimal quality of drinking water for human consumption. The use of modern water treatment technologies will allow to achieve the required quality of purified sufficient water for drinking purpose.

Valorization of waste micro-algal biomass – collected from coke oven effluent treatment plant and evaluation of sorption potential for fluoride removal

2017 ◽  
Vol 78 (1) ◽  
pp. 132-146 ◽  
Author(s):  
Gargi Biswas ◽  
Philips Prince Pokkatt ◽  
Aratrika Ghosh ◽  
Biswajit Kamila ◽  
Kalyan Adhikari ◽  
...  
Keyword(s):  
Fluoride Concentration ◽  
Industrial Effluent ◽  
Treatment Plant ◽  
Freundlich Isotherm ◽  
Coke Oven ◽  
Effluent Treatment ◽  
Fluoride Removal ◽  
Order Kinetic ◽  
Algae Biomass ◽  
Effluent Treatment Plant

Abstract Fluoride contamination in groundwater is now becoming a global concern. In the present study, removal of fluoride using dry biomass (DBM) of a micro-algal consortium of Chlorococcum infusionum and Leptolyngbya foveolaurum, collected from a coke-oven effluent treatment plant, Durgapur, India, has been investigated. The large volume of algal bloom in the industrial effluent has created serious disposal issues and caused severe environmental concerns. A biosorption technique has been carried out to valorize the waste algae biomass into a potential adsorbent. Response Surface Methodology (RSM) is used to model and optimize fluoride removal. Maximum fluoride removal (72%) is obtained at pH 4, 5 mg/L initial fluoride concentration, 0.5 g/L adsorbent dose (AD), and 25 °C temperature during one-factor-at-a-time (OFAT) analysis. The optimum condition of removal as specified by RSM is – initial concentration of fluoride: 30 mg/L, pH: 4.5, AD: 3.5 g/L and temperature: 30 °C. FESEM-EDX, FTIR and BET isotherm studies are done to characterize raw and fluoride treated biomass. Lagergren first order kinetic model and Freundlich isotherm model, are found to analyze best kinetic and equilibrium data, respectively. Adsorption capacity of DBM has been found to be 34.36 mg/g. The kinetics of fluoride removal have been well described by COMSOL Multiphysics.

scholarly journals Evaluation of contaminants in fluorosilicic acid used for public water fluoridation in the Santos region, Brazil

2016 ◽  
Vol 17 (4) ◽  
pp. 921-928
Author(s):  
Ciro Capitani dos Santos ◽  
Élio Lopes Santos ◽  
Flávia Gonçalves
Keyword(s):  
Quality Control ◽  
Inductively Coupled Plasma ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Phosphate Fertilizer ◽  
Emission Spectrometry ◽  
Human Consumption ◽  
Control Analysis ◽  
Water Fluoridation ◽  
Fluorosilicic Acid

Fluorosilicic acid is one of the main products used in water fluoridation. As a by-product of the phosphate fertilizer industry, it may contain contaminants that are harmful to human health. The aims of this study were to assess the quality control analysis of fluorosilicic acid; to detect the presence of contaminants, such as arsenic, lead, cadmium, aluminum, barium, strontium, cobalt, iron, and sulfur in fluorosilicic acid samples by using inductively coupled plasma–optical emission spectrometry; and to collect data for water analysis performed at a water treatment plant. The results show the presence of all contaminants mentioned previously, except for lead, in fluorosilicic acid samples from all sources. No quality control was carried out or required for this product at any time. Although the water analyses indicate the water is potable, there are no minimum safe limits for human consumption regarding carcinogenic elements such as cadmium and arsenic and both were detected and released in the water. Therefore, the purity of fluorosilicic acid used for water fluoridation should be required and monitored by public administrations to avoid long-term public health problems.

scholarly journals Review on Different Beneficial Ways of Applying Alum Sludge in a Sustainable Disposal Manner

2018 ◽  
Vol 4 (9) ◽  
pp. 2230 ◽  
Author(s):  
Temple Chimuanya Odimegwu ◽  
I. Zakaria ◽  
M. M. Abood ◽  
C. B. K. Nketsiah ◽  
M. Ahmad
Keyword(s):  
Water Treatment ◽  
Building Material ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Human Consumption ◽  
Soil Stabilizer ◽  
Disposal Options ◽  
Alum Sludge ◽  
Soil Fertilizer ◽  
Purification Of Water

Disposal of waste from water treatment plant is one of the major issues most treatment plants seem not to overcome due to the constant generation of this waste as a result of meeting the demand of water and purification of water for human consumption. The effect of disposing sludge constantly in the environment has called for an economical and sustainable way of reusing alum sludge. However, this paper aimed at reviewing the possible literature on applying waste from water treatment plant in various ways, example; in building material; as brick and tiles, in concrete ; as replacement of cement and aggregate, in Geotechnics; as soil stabilizer and in agriculture; as soil fertilizer, in pottery; use as replacement of clay in flower pot production for sustainable disposal. All the above mentioned categories of uses have reviled an effective and efficient way in managing waste from water treatment plant (alum sludge), also a safer and economical manner of disposal.  However, the effects when used and the behaviour when it is incorporated with other materials were highlighted, other reuse and disposal options where discussed and the areas not covered (knowledge gap) was identified.

scholarly journals Water Quality Assessment After Modernization of the Technological System in the Water Treatment Plant in Drzenin (Poland)

2019 ◽  
Vol 29 (4) ◽  
pp. 257-266
Author(s):  
Anita Jakubaszek
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Chemical Properties ◽  
Water Treatment Plant ◽  
Technological System ◽  
Correct Selection ◽  
Human Consumption ◽  
Physical And Chemical

Abstract The article assesses the physical and chemical parameters of drinking water before and after the modernization of the technological system of water treatment station in Drzenin, Poland. The extension and modernization of the existing installation was necessary due to the poor technical condition of the devices, increasing demand for water in recent years and the periodic exceeding of the permissible values of water quality indicators. Analysis of physical and chemical properties of drinking water after the modernization of the system showed the effectiveness of the water purification processes used and the correct selection of the technological line. The obtained water quality parameters were in accordance with the Regulation of the Minister of Health on the quality of water intended for human consumption (Journal of Laws of 2017, item 2294).

scholarly journals PERT MATHEMATICAL MODEL DEVELOPMENT FOR THE SUPPLY OF DOMESTIC WELL-WATER TREATMENT PLANT

2020 ◽  
Vol 4 (2) ◽  
pp. 552-566
Author(s):  
Matthew O. Arowolo ◽  
Adefemi A. Adekunle ◽  
A. Ezekiel Fadiji
Keyword(s):  
Mathematical Model ◽  
Water Treatment ◽  
Water Supply ◽  
Model Development ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
World Market ◽  
Human Consumption ◽  
Well Water ◽  
The Government

In Nigeria most cities are water stressed, none of the cities are having regular water supply. Quality water for human consumption is a primary duty of the government but they have failed. Also, current cost of boreholes installation has increased beyond their capacity due to Naira devaluation in the world market. Water resources management requires constant monitoring in terms of its qualitative-quantitative values. This study presents potential impact of the Project Evaluation and Review Techniques (PERT) mathematical model software development for the supply of domestic well-water treatment plant. After testing software against the values then, the 37days calculated Expected Time (ET) is unreliable because the risk involved in this project is (100 – 34.23) % = 65.77 %. However, a new completing date can be predicted by PERT mathematical model for supply of domestic well-water treatment plant by varying probability of completion to predict new date of completing the plant. Therefore, concerning this research the Initial probability was moved from 34.23% to 90%. By interpolation with 37 days; the new acceptable date was 97.28 days. The risk involved now (100 – 90) % reduced to 10%, a very good comfortable zone for the project. This information has really helped in two ways: for easy computation and decision making in water supply scheme project. This result is useful in industrialization, individuals, housing estate, small and medium scale industries where quality domestic well-water for crops production is a necessity. Hence, it is recommended that, the developed mathematical models performed 

scholarly journals Fluoride Removal from Groundwater by Technological Process Optimization

2019 ◽  
Vol 26 (1) ◽  
pp. 133-147
Author(s):  
Marina Valentukeviciene ◽  
Ramune Zurauskiene ◽  
Youssef Amine Boussouga
Keyword(s):  
Experimental Data ◽  
Drinking Water ◽  
Treatment Plant ◽  
Fluoride Removal ◽  
Membrane Process ◽  
Groundwater Treatment ◽  
Baltic Region ◽  
Flat Sheet ◽  
Ro Membrane ◽  
Sorption Phenomenon

Abstract Fluoride removal from aqueous solutions was studied using nanofiltration and sorption techniques which have always been best key ways to deal with water contaminated by fluoride. In this presented work, we were firstly interested on fluoridated rejected water overcoming the drawback of RO membrane process of groundwater treatment plant in Baltic region (Kretinga, Lithuania). Opoka sorbent has shown effective results of fluoride sorption with efficiency higher than 77 %. In order to understand the sorption phenomenon and to validate the results obtained, we have applied experimental data on Freundlich and Langmuir isotherms which allow us to determine isotherms parameters (KF; 1/n and KL; qmax) and to confirm the experiment. Because of the unacceptable tariff of drinking water treated by RO, defluoridation with nanofiltration method is proposed in this study as a solution which can replace reverse osmosis technique. For that, tests of nanofiltration for fluoride removal were carried out at laboratory scale by using nanofiltration flat sheet membranes (NF270 and NF90).

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