scholarly journals Comparative Study of the Physico-Chemical and Metallic Quality of Waters and Sediments in the Larbaa Basin (Morocco) in the Dry and Wet Period

2021 ◽  
Vol 22 (8) ◽  
pp. 92-102
Author(s):  
Rachida Afgane ◽  
Faiza Benjelloun ◽  
Abderrahim Lahrach ◽  
Fatima Daide
Keyword(s):  
Comparative Study ◽  
Physico Chemical ◽  
Quality Of Waters

A comparative study of the physico-chemical properties affecting the organoleptic quality of fresh and thermally treated yellow tomato ecotype fruit

2017 ◽  
Vol 53 (5) ◽  
pp. 1219-1226 ◽  
Author(s):  
Assunta Raiola ◽  
Fabiana Pizzolongo ◽  
Nadia Manzo ◽  
Immacolata Montefusco ◽  
Patrizia Spigno ◽  
...  
Keyword(s):  
Comparative Study ◽  
Chemical Properties ◽  
Organoleptic Quality ◽  
Physico Chemical ◽  
Thermally Treated

scholarly journals Physico-chemical quality of waters of tubular wells located in the interior of the State of Rio Grande do Norte

2018 ◽  
Vol 32 (1) ◽  
pp. 91-96
Author(s):  
Gerbeson Carlos Batista Dantas ◽  
Henriqueta Monalisa Farias ◽  
Camila Rafaela Santos de Oliveira ◽  
Arthuro Munay Dantas da Silveira ◽  
Sâmea Valensca Alves Barros
Keyword(s):  
Rio Grande ◽  
The State ◽  
Chemical Quality ◽  
Physico Chemical ◽  
Quality Of Waters

Este trabalho tem como objetivo realizar a caracterização físico-química da água de dois poços tubulares, no período de três meses, localizados na zona rural do município de Parelhas, Estado do Rio Grande do Norte, e posteriormente, analisar a viabilidade de utilização da água bruta para consumo humano. Em relação às analises físico-químicas, foram determinados 15 parâmetros, tanto para a amostra A, como para a amostra B, a fim de caracterizá-las: pH, condutividade elétrica, temperatura na fonte, bicarbonato (HCO3-), cloreto (Cl-), dureza total (CaCO3), dureza (Ca2+), dureza (Mg2+), alcalinidade, sólidos totais dissolvidos, oxigênio dissolvido, nitrogênio amoniacal, nitrito (NO2-), nitrato (NO3-) e ferro. De acordo com os ensaios, as águas sob análise, apresentaram discordâncias em relação a Portaria de Potabilidade 2914/2011 nos seguintes parâmetros: Alcalinidade, sólidos totais dissolvidos, nitratos, nitritos e ferro. Somando-se a isso, as águas foram classificadas como duras (amostra B) e muito duras (amostra A), apresentaram condutividade extremamente elevada, superior a 590 μS.cm-1 e baixo teor de oxigênio dissolvido. Por fim, este trabalho conclui, a partir dos resultados dos parâmetros físico-químicos da amostra A e amostra B, que as água brutas dos poços estão inapropriadas ao consumo humano.

DECOLOURIZATION AND COD REMOVAL OF WASEWATER FROM ETHANOL PRODUCTION PROCESS FROM MOLASSES BY COAGULANTION USING INORGANIC ALUM

2010 ◽  
Vol 13 (3) ◽  
pp. 92-102
Author(s):  
Trung Duc Le
Keyword(s):  
Ethanol Production ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Treated Wastewater ◽  
Treatment Processes ◽  
Physico Chemical ◽  
Biological Methods ◽  
Treatment Step ◽  
Main Material

The industrial production of ethanol by fermentation using molasses as main material that generates large quantity of wastewater. This wastewater contains high levels of colour and chemical oxygen demand (COD), that may causes serious environmental pollution. Most available treatment processes in Vietnam rely on biological methods, which often fail to treat waste water up to discharge standard. As always, it was reported that quality of treated wastewater could not meet Vietnameses discharge standard. So, it is necessary to improve the treatment efficiency of whole technological process and therefore, supplemental physico-chemical treatment step before biodegradation stage should be the appropriate choice. This study was carried out to assess the effect of coagulation process on decolourization and COD removal in molasses-based ethanol production wastewater using inorganic coaglutant under laboratory conditions. The experimental results showed that the reductions of COD and colour with the utilization of Al2(SO4)3 at pH 9.5 were 83% and 70%, respectively. Mixture FeSO4 – Al2(SO4)3 at pH 8.5 reduced 82% of colour and 70% of COD. With the addition of Polyacrylamide (PAM), the reduction efficiencies of colour, COD and turbidity by FeSO4 – Al2(SO4)3 were 87%, 73.1% and 94.1% correspondingly. It was indicated that PAM significantly reduced the turbidity of wastewater, however it virtually did not increase the efficiencies of colour and COD reduction. Furthermore, the coagulation processes using PAM usually produces a mount of sludge which is hard to be deposited.

Physico-Chemical Assessment of Groundwater Quality of Ahmednagar Industrial Area

2011 ◽  
Vol 4 (4) ◽  
pp. 228-230
Author(s):  
Patil S.S Patil S.S ◽  
◽  
Gandhe H.D Gandhe H.D ◽  
Ghorade I.B Ghorade I.B
Keyword(s):  
Groundwater Quality ◽  
Industrial Area ◽  
Physico Chemical ◽  
Chemical Assessment

Physico-Chemical Analysis of Groundwater and Effect of Climatic Change in Angul-Talcher Area

2018 ◽  
Vol 6 (12) ◽  
pp. 26
Author(s):  
Aliva Bera ◽  
D.P. Satapathy
Keyword(s):  
Water Resources ◽  
Linear Regression ◽  
Regression Model ◽  
Climatic Change ◽  
Linear Regression Model ◽  
Ann Model ◽  
Quality Of Water ◽  
Physico Chemical ◽  
Simulation Based

In this paper, the linear regression model using ANN and the linear regression model using MS Excel were developed to estimate the physico-chemical concentrations in groundwater using pH, EC, TDS, TH, HCO3 as input parameters and Ca, Mg and K as output parameters. A comparison was made which indicated that ANN model had the better ability to estimate the physic-chemical concentrations in groundwater. An analytical survey along with simulation based tests for finding the climatic change and its effect on agriculture and water bodies in Angul-Talcher area is done. The various seasonal parameters such as pH, BOD, COD, TDS,TSS along with heavy elements like Pb, Cd, Zn, Cu, Fe, Mn concentration in water resources has been analyzed. For past 30 years rainfall data has been analyzed and water quality index values has been studied to find normal and abnormal quality of water resources and matlab based simulation has been done for performance analysis. All results has been analyzed and it is found that the condition is stable. 

Sign in / Sign up

Export Citation Format

Share Document