Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 46
Primeira ... 123 ... Última
Imagem não selecionada

Imprime registro no formato completo
A DNA pooling based system to detect Escherichia coli virulence factors in fecal and wastewater samples BJM
Luz María Chacón,J; Lizeth Taylor,C; Carmen Valiente,A; Irene Alvarado,P; Ximena Cortés,B.
The availability of a useful tool for simple and timely detection of the most important virulent varieties of Escherichia coli is indispensable. To this end, bacterial DNA pools which had previously been categorized were obtained from isolated colonies as well as selected in terms of utilized phenotype; the pools were assessed by two PCR Multiplex for the detection of virulent E. coli eaeA, bfpA, stx1, stx2, ipaH, ST, LT, and aatA genes, with the 16S gene used as DNA control. The system was validated with 66 fecal samples and 44 wastewater samples. At least one positive isolate was detected by a virulent gene among the 20 that were screened. The analysis of fecal samples from children younger than 6 years of age detected frequencies of 25% LT positive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Virulence genes; Wastewater; Fecal; Screening system; Escherichia coli.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400012
Imagem não selecionada

Imprime registro no formato completo
A framework for efficient wastewater treatment and recycling systems AgEcon
Mekala, Gayathri Devi; Davidson, Brian; Samad, Madar; Boland, Anne-Maree.
Use of un-treated/partially treated wastewater for irrigation in the dry countries of Asia and Africa and recycling of treated wastewater in the water scarce developed countries has become a common practice due to various reasons. While the lack of wastewater treatment to appropriate levels before use is a major problem in developing countries, the high cost of wastewater recycling is the major problem in developed countries. The current paper is part of a doctoral research and presents the conceptual framework for the research and the methodology that can be used to tackle the problems associated with wastewater recycling.
Tipo: Working or Discussion Paper Palavras-chave: Water reuse; Wastewater; Recycling; Pricing; Water allocation; Cost benefit analysis; Wastewater irrigation; Developing countries; Developed countries; Case studies; India; Australia; Hyderabad; Melbourne; Agribusiness; Agricultural Finance; Crop Production/Industries; Demand and Price Analysis; Farm Management; Production Economics.
Ano: 2008 URL: http://purl.umn.edu/46387
Imagem não selecionada

Imprime registro no formato completo
Abundance and species composition of planktonic Ciliophora from the wastewater discharge zone in the Bahía Blanca Estuary, Argentina Iheringia, Sér. Zool.
Barría de Cao,María Sonia; Pettigrosso,Rosa; Parodi,Elisa; Freije,Rubén.
The specific composition and abundance variation of the ciliate community from a wastewater discharge zone in the Bahía Blanca estuary, Argentina, were studied all throughout a year, from June 1995 to May 1996. The polluted area exhibited high values of particulate organic matter and nutrients, particularly phosphates. Aloricate ciliates were represented by 15 species belonging to the genera Strombidium Claparède & Lachmann, 1859; Strombidinopsis Kent, 1881; Cyrtostrombidium Lynn & Gilron, 1993; Strobilidium Schewiakoff, 1983; Lohmmanniella Leegaard, 1915 and Tontonia Fauré-Fremiet, 1914. Tintinnids were represented by nine species belonging to the genera Tintinnidium Kent, 1881, Tintinnopsis Stein, 1867 and Codonellopsis Jörgensen, 1924....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tintinnina; Ciliophora; Wastewater; Estuaries.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300001
Imagem não selecionada

Imprime registro no formato completo
Agricultural use of treated sewage effluents: agronomic and environmental implications and perspectives for Brazil Scientia Agricola
Fonseca,Adriel Ferreira da; Herpin,Uwe; Paula,Alessandra Monteiro de; Victória,Reynaldo Luiz; Melfi,Adolpho José.
In many studies worldwide the use of treated sewage effluents (TSE) as water and nutrient sources in agricultural irrigation have been introduced as a viable alternative for wastewater destination in the environment. Considering agronomic and environmental aspects the objectives of this review were: (i) to present an overview of TSE irrigation on different agro-systems (annual crops, orchards, forests and forages); and (ii) to show the principal changes on chemical, physical and microbiological soil characteristics after TSE application. Various studies have revealed that the nutrient supply only by TSE irrigation was not sufficient to meet plant nutrient requirements resulting in yield decreases. The problem could be solved by an adapted...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Water reuse; Nutrient source; Agriculture; Environmental impact.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200014
Imagem não selecionada

Imprime registro no formato completo
Alterations in proteins and amino acids of the Nile cyanobacteria Pseudanabaena limnetica and Anabaena wisconsinense in response to industrial wastewater pollution BABT
El-Sheekh,Mostafa Mohamed; El-Otify,Ahmed Mohamed; Saber,Hani.
The effect of industrial wastewater on the Nile cyanobacteria Pseudanabaena limnetica and Anabaena wisconsinense was investigated. The data showed that P. limnetica was more sensitive to pollution than A. wisconsinense. The treatments with different levels of wastewater exerted pronounced reductions in protein and amino acids content. SDS-PAGE analysis revealed that the cyanobacteria grown in the industrial wastewater showed induction in the synthesis of certain polypeptides and repression of others. The treatments of P. limnetica with wastewater stimulated the appearance of six protein bands with molecular masses of 28, 30, 31, 32, 58 and 97 kDa. The same treatments caused the disappearance of 20, 38 and 56 kDa. The structural protein pattern of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acids; Anabaena; Electrophoretic patterns; Nile cyanobacteria; Protein; Pseudanabaena; Wastewater.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400022
Imagem não selecionada

Imprime registro no formato completo
Antimicrobial susceptibility and virulence-associated genes in Campylobacter isolates from milk and wastewater in Hatay, Turkey Ciência Rural
Elmalı,Mehmet; Can,Hayriye Yeşim.
ABSTRACT: Campylobacter is one of the most common causes of bacterial foodborne diseases throughout the world. This study was conducted to determine the prevalence, antimicrobial resistance and virulence of Campylobacter isolates of raw cow’s milk and cattle slaughterhouse wastewater samples in Hatay, Turkey. A total of 114 raw milk and 78 wastewater samples were analyzed for the identification of C. jejuni, C. coli, and C. lari by multiplex PCR. The overall prevalence of Campylobacter was found to be 7.2%, of these isolates, 85.7% were identified as C. jejuni and 14.2% as C. coli, but C. lari was not detected in the study. The cdtA and cadF genes were present in 66.6% and 41.6% of C. jejuni isolates tested, respectively, but wlaN gene was not found in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimicrobial resistance; Campylobacter; Milk; Wastewater.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500450
Imagem não selecionada

Imprime registro no formato completo
Biological treatment of drippers clogged by the use of treated domestic wastewater AGRIAMBI
Costa,Danniely O.; Batista,Rafael O.; Vale,Hudson S. M.; Sousa,Amanda B. de; Dombroski,Solange A. G.; Alves,Sandra M. C..
ABSTRACT This study aimed to recover the flow rate of clogged drippers with different doses and permanence times of the product MaxBio. The experiment was conducted in a completely randomized design in split-split-plot scheme, where the plots corresponded to product doses (80, 160, 240 and 320 mg L-1), subplots to the applied treatments (T1 - without biological treatment, T2 - 1st application of the product, and T3 - 2nd application of the product) and in sub-subplots the types of emitters (Plastro Hydrodrip Super, Netafim Tiran and Netafim PCJ-CNJ), with three replicates. The four irrigation units operated with treated domestic wastewater for 400 h in order to clog the emitters. After applying the product MaxBio, the flow rate of the drippers and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Emitters; Wastewater; Unclogging; Bactéria.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700595
Imagem não selecionada

Imprime registro no formato completo
Cassava wastewater (manipueira) treatment using a two-phase anaerobic biodigestor Ciênc. Tecnol. Aliment.
BARANA,Ana Cláudia; CEREDA,Marney Pascoli.
A two-phase anaerobic biodigestor was employed in order to analyze methane production with different manipueira organic loading rates. The acidogenic phase was carried out in a batch process whereas the methanogenic in an up-flow anaerobic fixed bed reactor with continuous feeding. The organic loading rates varied from 0.33 up to 8.48g of Chemical Demand Oxygen (COD)/L.day. The highest content of methane, 80.9%, was obtained with organic loading rate of 0.33g and the lowest, 56.8%, with 8.48gCOD/L.d. The highest reduction of COD, 88.89%, was obtained with organic loading rate of 2.25g and the lowest, 54.95%, with 8.48gCOD/L.d. From these data it was possible to realize that anaerobic biodigestion can be managed in at least two ways, i.e., for energy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anaerobic biodigestion; Biogas; Wastewater; Cassava; Methane.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000200010
Imagem não selecionada

Imprime registro no formato completo
Changes in the sediment trace metal contamination after the commissioning of a municipal wastewater treatment plant in the Souss estuary (South Morocco) ArchiMer
Moukrim, A; Chiffoleau, Jean-francois; Cheggour, M; Burgeot, Thierry.
Monthly samples of sediment were collected from the Souss estuary, to determine the changes which have occurred in the concentrations of ten metals between 2001 when the low estuary was receiving the wastewaters from Agadir city and 2003 after stopping the sewage dumping. The annual contents of Cu, Fe, Zn (in 2001) and those of Cr, Cu, Fe, Mn, Ni, Pb, and Zn (in 2003) showed significant correlations with those of Al, indicating that fluctuations of their concentrations were only due to those of the aluminosilicate fraction of the clayey sediment. After normalization of these metallic concentrations in relation to those of Al, the contents of the different metals showed insignificant correlations between both years, except for Zn which significantly dropped...
Tipo: Text Palavras-chave: Souss estuary; Wastewater; Sediment; Metal contamination.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-5923.pdf
Imagem não selecionada

Imprime registro no formato completo
CHLOROPHYLL FLUORESCENCE OF BASIL PLANTS CULTIVATED IN A HYDROPONIC SYSTEM USING TREATED DOMESTIC WASTEWATER REA
Gonçalves,Karoline S.; Alves,Lucylia S.; Paz,Vital P. da S.; Bandeira,Samir de S..
ABSTRACT Different techniques have been used to evaluate the energetic characteristics and damage to the photosynthetic apparatus of plants exposed to different stresses, including the measurement of chlorophyll fluorescence. The objective of this study is to evaluate the photosynthetic response by assessing the fluorescence parameters of chlorophyll a in basil (Ocimum basilicum L.) cv. Alfavaca Basilicão cultivated in a hydroponic deep-flow technique system using treated domestic wastewater. The study used a completely randomized block design with a 2 × 2 factorial scheme, in which the factors were the water source used for preparing the nutrient solution (tap water or treated domestic wastewater) and the height (upper and lower) of the platform of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Ocimum basilicum L.; Photosynthetic response.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300288
Imagem não selecionada

Imprime registro no formato completo
Comparison of White-rot Fungi and Ozone for Decolorization of Wastewater from Pulp and Paper Industry Thai Agricultural
Vaithanomsat, P.; Apiwattanapiwat, W.; Siriacha, P..
Palavras-chave: Comparison; Ozone; Decolorization; Wastewater; Pulp; Paper; Industry.
Ano: 2006 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5018
Imagem não selecionada

Imprime registro no formato completo
Composition and functional groups of epiedaphic ants (Hymenoptera: Formicidae) in irrigated agroecosystem and in nonagricultural areas PAB
Hernández-Ruiz,Patricia; Castaño-Meneses,Gabriela; Cano-Santana,Zenón.
The objective of this work was to evaluate the species composition and functional groups of ants in nonagricultural (NA) and in irrigated areas (S, seasonal irrigation; P, irrigation with well water; W, irrigation with wastewater) in an arid agricultural region in central Mexico, throughout 2005 and 2006. A total of 52,358 ants belonging to 6 subfamilies, 21 genera and 39 species was collected using pitfall traps. The species best represented in all plots were: Forelius pruinosus, Pheidole obtusospinosa, Monomorium minimum and Dorymyrmex spp. NA plots recorded the highest density of ants. The highest values for diversity (H') and equitativity (J') were recorded in NA and P plots, while the lowest were recorded in W plots. Cluster analysis showed two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Irrigated area; Semiarid zone; Wastewater.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800015
Imagem não selecionada

Imprime registro no formato completo
Cultivation of Scenedesmus dimorphus for C/N/P removal and lipid production Electron. J. Biotechnol.
Xu,Xinmiao; Shen,Ying; Chen,Jiacheng.
Background CO2 emission, water pollution and petroleum shortage are the issues coming with the development of industry. A cost effective system was constructed to fix the CO2 in flue gas (15% CO2), remove nitrogen and phosphorus from manure wastewater and produce biofuels at the same time. The significant cultivation conditions were selected by Plackett-Burman design, and then optimized with central composite design. Results Optimum culture condition was predicted at light intensity of 238 µmol·m- 2·s- 1, TN of 152 mg·L- 1, inoculum density of 0.3 g·L- 1, under which the measured CO2 fixation rate, total nitrogen and phosphorus removing rate, and lipid content were 638.13 mg·L- 1·d- 1, 88.16%, 73.98% and 11.9%, respectively. The lipid content was then...
Tipo: Journal article Palavras-chave: CO2 fixation rate; Flue gas; Lipid content; Scenedesmus dimorphus; Wastewater.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000100009
Imagem não selecionada

Imprime registro no formato completo
Development of seedlings of watermelon cv. Crimson Sweet irrigated with biosaline water AGRIAMBI
Silva,José E. S. B. da; Matias,Janete R.; Guirra,Keylan S.; Aragão,Carlos A.; Araujo,Gherman G. L. de; Dantas,Bárbara F..
ABSTRACTThe limited access and the scarcity of good quality water for agriculture are some of the major problems faced in agricultural areas, particularly in arid and semiarid regions. The aim of this study was to evaluate the quality of watermelon seedlings (cv. Crimson Sweet), irrigated with different concentrations of biosaline water of fish culture. The experimental design was completely randomized with five treatments, corresponding to biosaline water at different concentrations (0, 33, 50, 67 and 100%), and four replicates of 108 seedlings. Watermelon seeds were sown in plastic trays filled with commercial substrate and irrigated with different solutions of biosaline water. Seedlings were harvested for biometric analysis at 14, 21 and 28 days after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrullus lanatus; Wastewater; Salinity; Germination.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900835
Imagem não selecionada

Imprime registro no formato completo
Economics of Wastewater Treatment and Recycling: An Investigation of Conceptual Issues AgEcon
Devi, Mekala Gayathri; Davidson, Brian; Boland, Anne-Maree.
In the context of continuous droughts, the search for alternative water sources and increasing environmental restrictions on discharge of treated wastewater into natural water bodies, treated wastewater recycling offers a potential solution. In this paper the methods needed to assess the questions - to what extent treated wastewater can complement the existing water sources in different sectors and at what cost - are discussed? It was concluded that a comparative Benefit Cost Analysis of different combinations of uses and treatment levels would be a critical component in the development of a decision support tool which could be used by urban planners and water authorities. It was also found that community acceptance of recycled water, distribution of costs...
Tipo: Conference Paper or Presentation Palavras-chave: Wastewater; Recycling; Water quality; Pricing; Allocation; Urban design; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/9461
Imagem não selecionada

Imprime registro no formato completo
EFFECT OF AERATION AND RECIRCULATION IN THE REMOVAL OF NITROGEN AND CHEMICAL OXYGEN DEMAND FROM SANITARY SEWAGE IN A STRUCTURED BED REACTOR REA
Leick,Sheilla A.; Oliveira,João G B. De; Tavares,Karoline A.; Lopes,Deize D.; Barana,Ana C..
ABSTRACT This study aimed to evaluate a structured bed reactor with intermittent aeration in the simultaneous removal of Chemical Oxygen Demand (COD) and Total Nitrogen (TN) from sanitary sewage. The reactor was operated for 339 days with a Hydraulic Retention Time (HRT) of 12 hours, temperature of 30 ± 1°C and continuous feeding. Nine trials were carried out in which three different effluent recirculation flow (Qr), 3, 2 and 1 time the incoming flow, were evaluated in three different aeration times, of 1h, 2h, and 3h, in 3 hour cycles. The results showed that different recirculation flows and aeration times did not influence the removal of COD, which reached 89%±12. It was observed that the efficiency of TN removal was higher in the tests with higher...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioreactor; Wastewater; Denitrification; Nitrification; SND (Simultaneous Nitrification and Denitrification).
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601236
Imagem não selecionada

Imprime registro no formato completo
Effectiveness of Arsenic Co-Precipitation with Fe-Al Hydroxides for Treatment of Contaminated Water Rev. Bras. Ciênc. Solo
Mello,Jaime Wilson Vargas de; Gasparon,Massimo; Silva,Juscimar.
ABSTRACT Wastewater treatment is a challenging problem faced by the mining industry, especially when mine effluents include acid mine drainage with elevated arsenic levels. Iron (hydr)oxides are known to be effective in removal of As from wastewater, and although the resulting compounds are relatively unstable, the presence of structural Al enhances their stability, particularly under reducing conditions. The purpose of this study was to assess the effectiveness of Al-Fe (hydr)oxide co-precipitates for the removal of As from wastewater and to assess the chemical stability of the products. Different Al-Fe (hydr)oxides were synthesized at room temperature from ferrous and aluminum salts using three different Fe:Al molar ratios (1:0.0, 1:0.3, and 1:0.7) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Decontamination; Sludge stability; Magnetite; Goethite.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100513
Imagem não selecionada

Imprime registro no formato completo
Evaluation and enhancement of heavy metals bioremediation in aqueous solutions by Nocardiopsis sp. MORSY1948, and Nocardia sp. MORSY2014 BJM
El-Gendy,Mervat Morsy Abbas Ahmed; El-Bondkly,Ahmed Mohamed Ahmed.
ABSTRACT An analysis of wastewater samples collected from different industrial regions of Egypt demonstrated dangerously high levels of nickel (0.27-31.50 mg L-1), chromium (1.50-7.41 mg L-1) and zinc (1.91-9.74 mg L-1) in the effluents. Alarmingly, these heavy metals are among the most toxic knownones to humans and wildlife. Sixty-nine Actinomycete isolates derived from contaminated sites were evaluated under single, binary, and ternary systems for their biosorption capacity for Ni2+, Cr6+ and Zn2+ from aqueous solutions. The results of the study identified isolates MORSY1948 and MORSY2014 as the most active biosorbents. Phenotypic and chemotypic characterization along with molecular phylogenetic evidence confirmed that the two strains are members of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosorption; Heavy metals; Dead and live biomass; Nocardiopsis; Nocardia; Wastewater.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300571
Imagem não selecionada

Imprime registro no formato completo
Evaluation of various soaking agents as a novel tool for heavy metal residues mitigation from spinach Ciênc. Tecnol. Aliment.
AMIR,Rai Muhammad; RANDHAWA,Muhammad Atif; SAJID,Muhammad Wasim; NADEEM,Muhammad; AHMAD,Anwaar; WATTOO,Fahad Masoud.
Abstract Heavy metals pollution is a global threat to the environment and ecosystem due to various human and natural activities. Heavy metal intake through vegetables and diet leads to numerous ailments such as nervous disorder, kidney damage tubular growth and bone disease. The present study was conducted to mitigate the residue of heavy metals Hg, Pb, Zn and As in spinach collected from self-grown supervised field by using different washing treatments. Amount of trace metals was measured in fresh and chemically washed spinach samples with the help of Atomic Absorption Spectrophotometer (AAS). Results revealed that highest reduction of mercury, lead, zinc and arsenic residues with 10% citric acid was 23%, 28%, 54% and 22% respectively among the tested...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Spinach; Wastewater; Acidic solutions; Alkaline solutions; Biological extract.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000100176
Imagem não selecionada

Imprime registro no formato completo
EXTRACTION CAPACITY OF GRASSES GROWN IN CONSTRUCTED WETLAND SYSTEMS USING DIFFERENT ARRANGEMENTS AND SUBSTRATES REA
Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P. de.
ABSTRACT Constructed wetland systems have been used to treat different wastewater; among their essential components are the cultivated plant species and type of substrate used to fill them. The choice of plant species and type of substrate are important for the good system performance in wastewater treatment. This study aimed to evaluate the extraction capacity of Napier and Tifton 85 grasses when cultivated at different positions in horizontal subsurface flow constructed wetlands (HSSF-CWs) filled with different substrates in wastewater treatment from a bulk milk-cooling tank (MTWW). The experimental unit consisted of four HSSF-CWs, in which an average surface organic loading rate of 318 kg ha−1 d−1 of BOD5,20 was imposed and a hydraulic holding time of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Forage; Nutrients; Built wetlands.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500668
Registros recuperados: 46
Primeira ... 123 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional