Inverse Margin Filtration Applied for Surface Water Treatment

Technologies to be applied under the context of protection and revitalization of surface water must be developed and improved in order to enhance the quality of aquatic ecosystems. In this way, this study aimed to evaluate the treatment performance of an inverse margin filtration system (IMF) applied in surface water treatment. The IMF was monitored during 1 year through the classic water quality parameters, and thus the treatment performance along the filtration path was identified. The results showed an average removal efficiency of 41% for turbidity, 35% for apparent color, 43% for true color, 26% for total suspended solids and total organic carbon, 53% for nitrogen, 46% for phosphorus, 91% for iron, 8% for manganese, and 100% for fecal coliforms. In this way, the IMF system proved to be a technology that can be applied in the treatment of water in lentic environments.

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Cellulose Acetate Textile Fiber Filtration System Applied for Pre-Treatment of Surface Water

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/1982-3908_2022_45_44159 ◽

2022 ◽

Vol 45 ◽

Author(s):

Ana Silvia De Lima Vielmo ◽

Ailton Borges Rodrigues ◽

Eduardo Volkart da Rosa ◽

Dayane Gonzaga Domingos ◽

Juliana Barden Schallemberger ◽

...

Keyword(s):

Surface Water ◽

Cellulose Acetate ◽

Surface Waters ◽

Cigarette Butts ◽

Filtration System ◽

Apparent Color ◽

Cellulose Acetate Fiber ◽

Pre Treatment ◽

And Performance ◽

True Color

This study aimed to evaluate a nonwoven (NW) production and performance from cellulose acetate fiber from cigarette butts andapplied to a filtration system for surface water pre-treatment. The system had a surface area of 692 cm³, cellulose acetate from cigarette butt as filter media, was used and was fed with surface water from a pond. In order to evaluate the treatment performance of the filtration system were evaluated in the raw water (RW) and the filtered water (FW) the classical parameter of water quality as turbidity, total suspended solids (TSS), apparent color, true color, and total organic carbon (TOC) and heavy metals (iron, copper, and cadmium). Moreover, the presence of nicotine was investigated in the FW. The results showed a mean removal efficiency in order to 62.01%, 54.42%, 50.36 %, 6.73%, and 5.20% for turbidity, TSS, apparent color, true color, and TOC, respectively. The removal of metals varied in the order of 72.26%, 9.61%, and 2.12% for cadmium, iron, and copper, respectively. The presence of nicotine in RW and FW was not identified. In this way, besides reducing the negative environmental impacts caused by cigarette butts present in the environment, the developed technology showed potential for removing pollutants present in surface waters.

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ESTUDO DA CLARIFICAÇÃO DA ÁGUA SUPERFICIAL POR MEIO DA ASSOCIAÇÃO DOS AGENTES COAGULANTES MORINGA OLEIFERA LAM E POLICLORETO DE ALUMÍNIO

e-xacta ◽

10.18674/exacta.v9i2.1735 ◽

2016 ◽

Vol 9 (2) ◽

Author(s):

Karina Cardoso Valverde ◽

Priscila Ferri Coldebella ◽

Marcela Fernandes Silva ◽

Letícia Nishi ◽

Rosângela Bergamasco

Keyword(s):

Water Treatment ◽

Surface Water ◽

Moringa Oleifera ◽

Produced Water ◽

Environmental Issues ◽

Quality Parameters ◽

Process Efficiency ◽

Jar Test ◽

Apparent Color ◽

Moringa Oleifera Lam

Os coagulantes são amplamente utilizados no tratamento de água, porém, o estudo da associação dos coagulantes ainda é escasso. Assim, este trabalho propõe avaliar a eficiência da associação do coagulante natural Moringa oleifera Lam (M. oleifera) juntamente com o coagulante sintético policloreto de alumínio (PAC) em diferentes dosagens e pHs de coagulação, por meio da utilização de diagramas de coagulação no tratamento de água superficial. Os ensaios foram realizados em Jar Test, com água superficial proveniente da bacia do Rio Pirapó, Maringá, PR, variando-se o pH de coagulação e as dosagens de coagulantes, a fim de verificar a eficiência de remoção dos parâmetros de qualidade cor aparente, turbidez e compostos com absorção em UV254nm. Após os ensaios de coagulação/floculação e sedimentação, amostras de água tratada foram coletadas para avaliar a eficiência do processo por meio do residual obtido para os parâmetros de qualidade. Foram obtidas redução de até 40% na dosagem do coagulante sintético PAC, sem comprometer a qualidade da água produzida. Assim, a utilização de M. oleifera pode desempenhar um papel-chave na diminuição da quantidade de coagulante sintético utilizada no tratamento de água, além de ser mais compatível com as questões ambientais atuais.ABSTRACTThe coagulants are largely used in water treatment, however, the study of association of the coagulant are still scarce. This work aims to evaluate the effectiveness of natural coagulant Moringa oleifera Lam (M. oleifera) in association with coagulant polyaluminium chloride synthetic (PAC) in various dosages and coagulation pHs, using coagulation diagrams, in the treatment of surface water. The tests were performed in Jar Test with surface water from Pirapó River Basin, Maringá, PR, varying the coagulation pHs and dosages of coagulants, in order to verify the quality parameters removal efficiency: apparent color, turbidity and compounds with absorption at UV254nm. After coagulation/flocculation and sedimentation tests, treated water samples were collected to evaluate the process efficiency by the residual obtained for quality parameters. Reduction near 40% was obtained for synthetic coagulant PAC dosage, without compromising the produced water quality. Thus, the use of M. oleifera can play a key role in reducing the quantity of synthetic coagulant used in water treatment, beside to be more compatible with current environmental issues.

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Optimum location of an ultraviolet step in a surface water treatment plant

Water Science & Technology Water Supply ◽

10.2166/ws.2002.0194 ◽

2002 ◽

Vol 2 (5-6) ◽

pp. 381-386

Author(s):

C. Lemoine ◽

D. Gatel ◽

J. Cavard

Keyword(s):

Water Treatment ◽

Surface Water ◽

Treatment Plant ◽

Water Treatment Plant ◽

Quality Parameters ◽

Current Level ◽

Surface Water Treatment ◽

Filtration Unit ◽

The Impact ◽

Treatment Step

To meet the new DBP rules, ozone doses will have to be minimized to control bromate formation. In some surface water treatment plants, this situation may become of concern, since disinfection will have to be maintained at the current level. Alternative disinfection means such as UV have therefore to be evaluated, and this study was designed to evaluate the impact of MP-UV on water quality parameters such as atrazine, BDOC or nitrites, to determine whether such a treatment step should be inserted before or after the current GAC filtration unit. According to the results shown here, this question is not an issue under conditions needed for Cryptosporidium inactivation.

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