Consulta: subjectFacets:"Reverse osmosis"
Registros recuperados: 3
Data/hora: 17/06/2024 07:04:10

Removal of Diuron and Hexazinone from Public Water Supply Using a Filter System
Provedor de dados: 87
Autores: CALEGARI,R.P.; MENDES,K.F.; MARTINS,B.C.; PIMPINATO,R.F.; BAPTISTA,A.S.; TORNISIELO,V.L.
ABSTRACT: The intensive use of pesticides, such as the herbicides diuron and hexazinone, leads to a concern about the preservation of the water quality of the water resources destined for human consumption. Currently, conventional water treatment techniques do not have high capacity to remove herbicides; therefore, the need to study other techniques arises. The present study aimed to evaluate the efficiency of the removal of diuron and hexazinone herbicides present in water through a commercial filtration system. The study was carried out in a filtration system composed of the following sequence of filters: sand filter and coconut shell activated granular carbon, polypropylene filter 20 mm, activated carbon filter with silver salts, polypropylene filter 5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activated granular coal; Reverse osmosis; Herbicide removal; Water treatment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100346

Improvement on the concentrated grape juice physico-chemical characteristics by an enzymatic treatment and Membrane Separation Processes
Provedor de dados: 42
Autores: CAMPOS,PLÍNIO R.F.; MÓDENES,APARECIDO N.; ESPINOZA-QUIÑONES,FERNANDO R.; TRIGUEROS,DANIELA E.G.; BARROS,SUELI T.D.; PEREIRA,NEHEMIAS C.
ABSTRACT In this work, the improvement on the concentrated grape juice physico-chemical characteristics by using an enzymatic treatment followed by Membrane Separation Process (MSP) has been investigated. By using Novozym 33095(r) and Ultrazym AFP L(r) enzymes varying three operating parameters, the best result on the grape pulp characteristics was attained for the Novozym 33095(r) performed at 35oC, 15 min. and 50 mgL-1. In micro/ultra filtration processes after enzymatic pretreatment, the best performance of the MSP with high permeate flux value and suitable grape juice characteristics was attained using 0.05 mm membrane pore size, 1 bar pressure and 40 oC treatment temperature. When reverse osmosis process is operated at 40 bar and 40oC, high soluble...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grape juice; Enzymatic treatment; Micro/ultra filtration; Reverse osmosis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100423

Evaluation of the acerola juice concentrated by reverse osmosis
Provedor de dados: 52
Autores: Gomes,Eliane Rodrigues dos Santos; Mendes,Elisabete Scolin; Pereira,Nehemias Curvelo; Barros,Sueli Teresa Davantel de.
The aim of this study was to obtain the acerola juice using separation processes with membranes. The acerola pulp was initially defrosted and treated with 100 ppm of Citrozym Ultra L enzyme at 45ºC for one hour, then ultrafiltrated at 3 bar at 45ºC using 0.1 µm ceramic membrane, and concentrated by reverse osmosis using a spiral membrane of a compound film. The pressures on the reverse osmosis were 20, 30, and 40 bar at environmental temperature, thus, resulting a juice with 9.76, 14.56, and 17.36 ºBrix, respectively. The physicochemical characteristics of the juice were preserved and, studies on evaluation of the public acceptability, showed that 75% of the consumers liked the juice.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acerola; Ultrafiltration; Reverse osmosis; C Vitamin; Concentration.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400022