scholarly journals The Effect of Water and Sewage Treatment on Reducing Residues of Selected Organochlorine Pesticides in Szczecin (Poland)

2021 ◽  
Vol 232 (8) ◽  
Author(s):  
Jacek Cybulski ◽  
Agata Witczak ◽  
Kamila Pokorska-Niewiada
Keyword(s):  
Drinking Water ◽  
Organochlorine Pesticides ◽  
Organochlorine Pesticide ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Raw Material ◽  
Effect Of Water ◽  
Water Treatment Process ◽  
Multi Stage ◽  
Treated Sewage

AbstractWater is principally intended for direct consumption and for the production of food and beverages. It is also a valuable raw material in the industry. Despite the use of multi-stage treatment processes, the quality of drinking water may still be a concern in some countries due to the presence of toxic pollutants, often challenging to remove through the conventional treatment process. The presence of even trace amounts of organochlorine pesticides in drinking water is dangerous due to their ability to accumulate in the human body and their effects, especially their capacity for endocrine disruption. The present study aimed to assess the effect of water and sewage treatment on the efficiency of reducing residues of selected organochlorine pesticides in drinking water and treated sewage. It was found that the water treatment process reduced concentrations of these compounds by an average of 80% (46–100%) and that the levels of organochlorine pesticides in the drinking water were no higher than 0.55% the maximum residue limit (MRL). The sewage treatment process led to a reduction in organochlorine pesticide concentration of 37–100%, averaging 85%, and the sums of organochlorine pesticide residues in treated sewage ranged between 0.02 and 14.97 ng/L in annual terms.

Anaerobic-Aerobic Combined Process for the Treatment of Sewage with Nutrient Removal: The Ananox® Process

1992 ◽  
Vol 25 (7) ◽  
pp. 383-394 ◽  
Author(s):  
G. Garuti ◽  
M. Dohanyos ◽  
A. Tilche
Keyword(s):  
Organic Matter ◽  
Nutrient Removal ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Sewage Treatment ◽  
Warm Season ◽  
Combined Process ◽  
Water Treatment Process ◽  
A Value ◽  
N Removal

Results of a three year experience on a combined anaerobic-anoxic-oxic municipal waste water treatment process - named ANANOX® - are presented. This process demonstrated to be highly efficient, with 89.6% CODt, 89.2% TSS and 81.2% N removal, and a sludge production of only 0.2 kg TSS.kg COD removed−1, a value which is roughly 50% less if compared with traditional nitrification/denitrification processes. Sulphates play a very significant role in the process because, after being reduced in the anaerobic step, where they give a contribution to the organic matter degradation, they are reoxidized in the anoxic step by nitrates, reducing the organic matter need for denitrification. Due to the high dependence of efficiency on temperature, the system proposed has advantageous uses for sewage treatment, particularly in warm climates and in tourist and recreational areas where the population increases during the warm season.

Removal of pesticides during the drinking water treatment process at Florence water supply, Italy

1999 ◽  
Vol 48 (5) ◽  
pp. 177-185 ◽  
Author(s):  
O. Griffini ◽  
M. L. Bao ◽  
D. Burrini ◽  
D. Santianni ◽  
C. Barbieri ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Process ◽  
Drinking Water Treatment ◽  
Water Treatment Process

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.

scholarly journals The distributions, removals and estrogenic effects of selected endocrine disrupting chemicals in two drinking water factories in China

2012 ◽  
Vol 11 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Hong-Chang Zhang ◽  
Ting Xu ◽  
Xia-lin Hu ◽  
Wei-hai Pang ◽  
Da-Qiang Yin
Keyword(s):  
Drinking Water ◽  
Treatment Process ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Endocrine Disrupting Chemicals ◽  
Estrogen Receptor Α ◽  
Raw Water ◽  
Water Treatment Process ◽  
Estrogenic Effects ◽  
Endocrine Disrupting

The distributions and effects of 31 selected endocrine disrupting chemicals (EDCs) in two drinking water factories were analyzed in this study. The distributions of EDCs were analyzed by solid phase extraction (SPE) combined with liquid chromatography tandem mass spectrometry (LC-MS/MS). The concentrations of these EDCs were from lower than the LOD (limit of detection) to 23.13 ng L − 1 in the samples; most of them were lower than 1 ng L − 1. The highest concentration (23.13 ± 1.45 ng L − 1) was detected in the raw water. Twenty-six chemicals were found in the raw water and only five in the finished water of drinking water factory A, while 25 chemicals were detected in the raw water and two in the finished water of drinking water factory B. The results indicate that most of the EDCs can be removed by the water treatment process. In the advanced treatment process, the ozonation processes have the highest removal efficiency. Separate analyses in May and September show similar results. Apart from the chemical analysis, yeast strain transformed when the estrogen receptor α (ERα) gene was employed to test the estrogenic effects of the water samples. Due to the low concentrations of these EDCs, no significant estrogenic effects were found from the samples.

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