Adsorption test of semi-volatile di-(2-ethylhexyl) phthalate in coagulation and flocculation processes with/without bubble in closed jar tester

2006 ◽  
Vol 6 (3) ◽  
pp. 9-16 ◽  
Author(s):  
Y. Thaveemaitree ◽  
F. Nakajima ◽  
H. Furumai ◽  
S. Kunikane
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Fresh Water ◽  
Water Contamination ◽  
Suspended Solids ◽  
Operation Time ◽  
Drinking Water Treatment ◽  
Laboratory Environment ◽  
Coagulation And Flocculation ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP) is widely used and abundantly exists in the environment. Due to fresh water contamination, DEHP can enter drinking water treatment and be adsorbed on solid floc generated mostly from coagulation and flocculation processes. This study aimed to quantify the distribution of DEHP in liquid/solids (floating scum, suspended solids and settled sludge) after coagulation and flocculation processes with/without bubble. For this purpose, we developed a closed jar tester to prevent DEHP volatilization and contamination from the laboratory environment. According to DEHP adsorption results, the aluminium coagulant is an important factor for DEHP adsorption and the floating solid contained more DEHP than the settled solid. 60–72% of initial DEHP was found in solid under conditions with aluminium coagulant, whereas 3–5% of initial DEHP was found in solid under the condition without coagulant. When the bubble presented, DEHP concentration in the solids in the top and middle layers increased. The 55 minutes of operation time (coagulant, flocculation and settling processes) was not long enough to achieve the equilibrium of DEHP adsorption especially in the cases with coagulant.

scholarly journals Use of Aloe vera as an Organic Coagulant for Improving Drinking Water Quality

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2024
Author(s):  
Abderrezzaq Benalia ◽  
Kerroum Derbal ◽  
Amel Khalfaoui ◽  
Raouf Bouchareb ◽  
Antonio Panico ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Suspended Solids ◽  
Aluminum Sulfate ◽  
Aloe Vera ◽  
Drinking Water Treatment ◽  
Water Turbidity ◽  
Turbidity Removal ◽  
Maximum Turbidity ◽  
Optimal Ph

The coagulation–flocculation–sedimentation process is widely used for removal of suspended solids and water turbidity reduction. The most common coagulants used to conduct this process are aluminum sulfate and ferric sulfate. In this paper, the use of Aloe vera as a natural-based coagulant for drinking water treatment was tested. The bio-coagulant was used in two different forms: powder as well as liquid; the latter was extracted with distilled water used as a solvent. The obtained results showed that the use of the natural coagulant (Aloe vera) in both powder (AV-Powder) and liquid (AV-H2O) forms reduced the water turbidity at natural pH by 28.23% and 87.84%, respectively. Moreover, it was found that the use of the two previous forms of bio-coagulant for drinking water treatment had no significant influence on the following three parameters: pH, alkalinity, and hardness. The study of the effect of pH on the process performance using Aloe vera as a bio-coagulant demonstrated that the maximum turbidity removal efficiency accounted for 53.53% and 88.23% using AV-Powder and AV-H2O, respectively, at optimal pH 6.

scholarly journals OPTIMIZATION OF THE DRINKING WATER TREATMENT PROCESS OF A SUGAR PLANT STATION IN COTE DIVOIRE

2021 ◽  
Vol 9 (01) ◽  
pp. 512-524
Author(s):  
Konan Lopez Kouame ◽  
◽  
Nogbou Emmanuel Assidjo ◽  
Andre Kone Ariban ◽  
◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Treatment Process ◽  
Polynomial Regression ◽  
Drinking Water Treatment ◽  
Optimal Dose ◽  
Raw Water ◽  
Water Treatment Process ◽  
Jar Test ◽  
Coagulation And Flocculation

This article presents an optimization of the drinking water treatment process at the SUCRIVOIRE treatment station. The objective is to optimize the coagulation and flocculation process (fundamental process of the treatment of said plant)by determining the optimal dosages of the products injected and then proposes a program for calculating the optimal dose of coagulant in order to automatically determine the optimal dose of the latter according to the raw water quality. This contribution has the advantage of saving the user from any calculations the latter simply enters the characteristics of the raw effluent using the physical interface of the program in order to obtain the optimum corresponding coagulant concentration. For the determination of the optimal coagulant doses, we performed Jar-Test flocculation tests in the laboratory over a period of three months. The results made it possible to set up a polynomial regression model of the optimal dose of alumina sulfate as a function of the raw water parameters. A program for calculating the optimal dose of coagulant was carried out on Visual Basic. The optimal doses of coagulant obtained vary from 25, 35, 40 and 45 mg/l depending on the characteristics of the raw effluent. The model obtained is: . Finally, verification tests were carried out using this model on the process. The results obtained meet the WHO drinkability standards for all parameters for a settling time of two hours.

Study on the Micro-Polluted Water Treatment by GAC-UF

2010 ◽  
Vol 113-116 ◽  
pp. 2049-2052
Author(s):  
Jin Long Zuo
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Suspended Solids ◽  
Treatment Process ◽  
Drinking Water Treatment ◽  
Polluted Water ◽  
Total Removal ◽  
Water Treatment Process

Nowadays drinking water resource has been polluted, while the conventional treatment process cannot effectively remove polluted matters. In order to tackle this problem, the granular activated carbon (GAC) and ultrafiltration membrane (UF) were introduced into drinking water treatment process. The results revealed that when treat the micro-polluted water the effluent water quality of turbidity, permanganate index and color can reach 0.1NTU, 1.3mg/L-2.3mg/L and 5 degree respectively with GAC-UF process. And the total removal efficiency of turbidity, permanganate index and color can reach 98%-99%, 70%~75% and 60% respectively. The GAC can effectively remove organic matters, while the UF membrane can effectively remove suspended solids, colloids. The GAC-UF combined process can get a good water quality when treat the micro-polluted water.

Relationship between di-(2-ethylhexyl) phthalate concentration and chemical structure of organic matter on solids in drinking water treatment processes

2004 ◽  
Vol 4 (5-6) ◽  
pp. 321-333 ◽  
Author(s):  
Y. Thaveemaitree ◽  
F. Nakajima ◽  
H. Furumai ◽  
S. Kunikane
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Toxic Substance ◽  
Drinking Water Treatment ◽  
Solid Particles ◽  
High Concentration ◽  
Fragment Composition ◽  
Treatment Processes ◽  
Ethylhexyl Phthalate

Di-(2-ethylhexyl) phthalate (DEHP), regarded as a toxic substance, is widely used and abundantly contaminated in environments. Via contamination of freshwater, DEHP can enter into drinking water treatment and be adsorbed on solid particles. This study was aimed at understanding the concentration phenomenon of DEHP in drinking water treatment process, focusing on the relationship between DEHP concentration and characteristics of organic matter on the solids formed in the processes as scum, suspended solid and sludge. Solid samples were collected from five drinking water treatment processes in Japan and analyzed by pyrolysis GC/MS. The solids were categorized by the sampling locations, solid types and fragment composition. The specificity of the pyrolysis fragments in each group was summarized into a matrix. When compared with concentration of DEHP and characteristics of organic matter, a solid specifically containing many specific aliphatic fragments contained significantly high concentration of DEHP.

scholarly journals Predicting turbidity and Aluminum in drinking water treatment plants using Hybrid Network (GA- ANN) and GEP

2021 ◽  
Author(s):  
Ruba Alsaeed ◽  
Bassam Alaji ◽  
Mazen Ebrahim
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Coming Out ◽  
Drinking Water Treatment ◽  
Hybrid Network ◽  
Raw Water ◽  
Water Treatment Plants ◽  
Coagulation And Flocculation ◽  
Water Ph ◽  
Drinking Water Purification

Abstract. Turbidity is the most important parameter needed to check the status of drinking water, as it is an integrated parameter because its high values indicate high values of other parameters related to water quality. Coagulation and flocculation are the most essential processes for the removal of turbidity in drinking water treatment plants. Using alum coagulants increases the aluminum residuals in treated water, which have been linked to Alzheimer's disease pathogenesis.In this paper, a hybrid algorithm (GA-ANN) used to predict the turbidity values in the drinking water purification plant in Al Qusayr was used.The models were constructed using raw water data: turbidity of raw water, pH, conductivity, temperature, and coagulant dose, to predict the turbidity values coming out of the plant.Several models built and fitness detected for each model, the network with the highest fitness was selected, and then a hybrid prediction network was constructed.The selected network was the most able to predict turbidity of the outlet with high accuracy with a correlation coefficient (0. 9940) and a root mean square error of 0.1078.And 4 equations for determining the value of the residual aluminum was obtained using Gene expression method, and the best equation produced results with very good accuracy, in this regard it can be referred to RMSE = 0.02 R = 0.9 for the best model.

ASSESSMENT OF ELECTROCOAGULATION PROCESS FOR DRINKING WATER TREATMENT

2015 ◽  
Vol 14 (6) ◽  
pp. 1347-1354 ◽  
Author(s):  
Florica Manea ◽  
Anamaria Baciu ◽  
Aniela Pop ◽  
Katalin Bodor ◽  
Ilie Vlaicu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Electrocoagulation Process
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