Among the animal protein production activities, world aquaculture has highest growth rate, and is mainly practiced in ground-excavated ponds. However, with great productivity comes concern about increasing generation of effluents, at moment fish removal, when high loads organic matter nutrients are released into environment. Thus, this study evaluated quality effluents through principal component analysis (PCA) samples from nurseries different sizes four sampling scenarios. Analysis was...

Continuous flow experiments (450 mL min-1) were performed in household filter order to investigate the removal and/or inactivation of T4 bacteriophage, using granular activated carbon (GAC) modified with silver copper oxide nanoparticles at different concentrations. GAC and characterized by X-ray diffractometry, specific surface area, pore size volume, average diameter, scanning electron microscopy, transmission zeta potential atomic absorption spectroscopy. The antiviral activity produced...

Abstract The effectiveness of chemical and thermal pretreatments on Moringa oleifera pods for the atrazine removal from water was investigated. untreated (MOP un ), chemically treated (MOPC), followed by thermally (MOPT) were physico‐chemically morphologically characterized elemental, pH ZPC , N 2 physisorption, FTIR, SEM analysis. effect modified significant in increasing surface porosity, favouring chemistry, improving biosorption capacity. Kinetics data best explained pseudo‐second order...

The objective of this study is to investigate the impacts anionic polymer as a flocculant aid on coagulation/flocculation performance with saline solution Moringa oleifera coagulant provide larger flocs and decrease time sedimentation. For tests, raw water was used from Pirapó River Basin (Maringá, Paraná, Brazil). Optimization tests initially performed in jar-test dosage M. Lam (crude extract – MO, oil-extracted ethanol MO (et) hexane (hex) 1% m/v) that ranged 10 60 mg L−1 0.1% 0 0.4 L−1....

In the present study, use of rice husk biomass as an alternative biosorbent for treating estrone, 17 β-estradiol, and estriol hormones in monocomponent multicomponent systems was investigated. The high-performance liquid chromatography technique (HPLC-UV) applied order to quantify hormones, validating this method according ANVISA INMETRO. presented functional groups typical cellulose, hemicellulose, lignin, proteins, with amorphous, fibrous, porous surface. best performance obtained a...

The cassava leaf, waste generated in the harvest of roots, is characterized by high content protein, vitamins and minerals; however, its use limited due to fiber antinutritional substances, which can be removed obtaining protein concentrates. In this context, objective study was evaluate extraction processes, aiming leaves (Manihot esculenta Crantz) as an alternative protein. Four methods were tested: 1) Coagulation Proteins Lowering Temperature, 2) Extraction Isoelectric Precipitation, 3)...

Natural organic matter (NOM) is found in all surface, ground, and soil waters. The presence of NOM causes many problems drinking water treatment processes. Minimization the disinfection byproducts precursors or effective removal has emerged as a critical issue production high quality from surface water. objective present investigation to explore capacity tannin remove coagulation/flocculation/filtration/chlorination process order minimize total trihalomethanes (TTHM) formation. For tests,...

The purpose of this study was to determine the total nitrogen (TN) and phosphorus (TP) balance during intensive tilapia farming in excavated ponds. To quantify TN TP released into environment, supply water, effluents at harvest time, fish composition, feed, sediment were analysed. mass between amount nutrients that is inserted through which transformed biomass by retained calculated based on dry matter. nutrient load arriving from water as a function concentration TP. dynamics harvesting...

This study aimed to evaluate the efficiency of coagulation/flocculation/dissolved air flotation (C/F/DAF) process using coagulant Moringa oleifera (MO) seed powder, and analyse profile fatty acids present in generated sludge after treatment. For tests, deionized water artificially contaminated with cell cultures Anabaena flos-aquae was used, a density order 104 cells mL–1. C/F/DAF tests were conducted 'Flotest' equipment. acid analyses, gas chromatograph equipped flame ionization detector...

The present study aims to optimize the operational conditions in surface water coagulation/flocculation and sedimentation step, besides evaluating association between seeds of Moringa oleifera Lam. ( M. ) synthetic coagulant aluminium sulphate for treatment. assays were performed Jar Test using from Pirapó River basin, Maringá, PR. It was observed that affect process efficiency. Optimal coagulants are as follows: rapid mixing velocity (RMV) 105 rpm, times (RMT) 1 min, slow (SMV) 30 (SMT) 15...

Water treatment plants are designed to remove turbidity and apparent colour, produce safe water from a microbiological chemical point of view. Disinfection is the step responsible for security, which chlorine most widely‐used agent, since it can react with organic matter present in raw form total trihalomethanes (TTHM), harmful humans. In this context, proposed evaluate effectiveness combined process coagulation, flocculation, sedimentation (C/F/S) followed by an activated carbon column. The...

The construction of coagulation diagrams is provided to obtain colour, turbidity and compounds with absorption at UV254 nm removal by associating the coagulants Moringa oleifera Lam aluminium sulphate define optimal conditions process in water treatment. Experiments were performed jar test several coagulant dosages pH. Optimal for raw high colour/turbidity obtained pH values ranging from 7.5 8. After filtration, three association sulphate—M. oleifera, 25 ppm/300 ppm; 20 ppm/350 ppm 15...

Tecnologias convencionais de tratamento água, como a coagulação-floculação; sedimentação; filtração convencional e desinfecção, não são suficientes para remover concentrações muito baixas pesticidas. A Moringa oleifera Lam (MO) é um importante material natural que pode ser usado adsorvente contaminantes orgânicos da água. Neste estudo se avaliou capacidade adsorção semente MO remoção do herbicida Diuron soluções aquosas. Soluções 5 mg.L-1 foram preparadas analisadas por Cromatografia Liquida...

The present research evaluates the groundwater nitrate concentration of Maringá region (Paraná State, Brazil) aiming at removal by coagulation/flocculation using a natural coagulant obtained from seeds Moringa oleifera Lam. plant (MO) combined with an activated carbon filter. Groundwater samples were collected in City metropolitan area and characterized physicochemical analyses. results showed NO 3 − concentrations ranging 0–60 mg L −1 . Thus, variation water used assays lay between 10–60 ·...

This study investigated the efficiency of Moringa oleifera (MO) seeds as natural coagulant in coagulation/flocculation/dissolved air flotation (C/F/DAF), followed by nanofiltration (NF) for Microcystis protocystis and microcystin-LR removal. The methodology adopted this work was performed two steps: 1) (C/F/DAF) process using MO extracted saline solution potassium chloride (KCl-1M) sodium (NaCl-1M) optimum dosage 50 mg·L -1 ; 2) NF90 NF270 membrane provided Dow Chemical Company®. A working...

Existem vários estudos sobre coagulantes naturais, contudo, informações as condições de operação no processo coagulação/ floculação e sedimentação ainda são insuficientes, principalmente relacionadas aos efeitos dos químicos em conjunto com a Moringa oleifera Lam (M. oleifera). Assim, o objetivo foi avaliar eficiência da associação policloreto alumínio (PAC) M. na remoção cor aparente, turbidez compostos absorção UV254nm (UV254nm), função alteração das velocidades tempos mistura, fim se...

This study modified the surface of a commercial polyamide membrane with deposition TiO2 nanoparticles by self-assembly method under pressure high permeability and photocatalytic activity. Changes in characteristics its performance for properties were evaluated. The results indicated that both hydrophilicity significantly improved presence applied 1 bar. particles was able to maintain on membranes their capacity three cycles use. prepared presented great potential wastewater treatment reuse...

Qualidade da agua e quantidade disponivel no planeta, um dos assuntos que causam maior preocupacao mundial, visto que, trata-se de recurso indispensavel para a sobrevivencia todos os organismos ecossistema. Dessa forma, propomos fazer uma revisao integrativa avaliar qualidade rios brasileiros utilizando celulas meristematicas Allium cepa como bioindicador. Tratou-se estudo realizado entre fevereiro abril 2020. O foi orientado pela seguinte pergunta: Como esta sendo avaliada o teste ? De...

<p align = "justify">A Moringa oleifera Lam (M. oleifera) é um biopolímero considerado como promissor coagulante principalmente por ser natural, biodegradável, e produzir altas reduções na turbidez da água bruta. Contudo, o desempenho começa a decair ponto de tornar ineficiente após certo período. Desse modo, este trabalho propõe estudo do tempo degradação M. em pó, fim verificar se poder alterado relação ao armazenamento desse produto refrigerador. Os ensaios coagulação/floculação...