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| Registros recuperados: 47 | |
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| Robledo Santoyo, Edmundo. |
| Como subproducto del tratamiento de las aguas residuales de la ciudad de Aguascalientes, Ags., en la Planta de Tratamiento “El Niágara”, se generan diariamente de 150 a 170 m3 de biosólidos. Estos materiales son aplicados a suelos agrícolas de áreas cercanas a la planta, sin regulación alguna, por lo que se han obtenido buenos resultados o causado quemaduras en plántulas o endurecimiento de suelos. El objetivo de este proyecto fue generar estrategias para la disposición y aprovechamiento de los biosólidos para mejorar suelos agrícolas y la calidad y rendimiento de los cultivos, sin perjuicio para el ambiente. Para determinar el efecto de los biosólidos sobre suelos y plantas, se colectaron muestras de los biosólidos y se tomaron muestras de tres tipos de... |
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Palavras-chave: Aguas residuales; Metales pesados; Contaminación; Mejoradores del suelo; Wastewater; Heavy metals; Contamination; Soil amendments; Edafología; Doctorado. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1733 |
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| Gaona Quesada, Rafael. |
| Existe una planta de tratamiento de aguas residuales (PTAR) en el río Grande de Morelia que tiene una capacidad para 2.19 m3s-1, cuya agua tratada se mezcla con el agua del río proveniente de la presa y luego se conduce para irrigar las superficies de los módulos II, III y IV del Distrito de Riego 020 Morelia-Queréndaro, Michoacán. Los usuarios de estos módulos, tienen concesión para usar tanto el agua del río proveniente de la presa así como para usar el agua residual de la ciudad de Morelia. En este trabajo se evalúa la factibilidad económica de entubar el agua proveniente de la PTAR y llevarla hasta el punto de control de cada uno de los módulos. Con el proyecto se podrá evitar la mezcla de aguas residuales con agua proveniente de la presa y de tener... |
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Palavras-chave: Aguas residuales; Diseño hidráulico; Indicadores económicos; Wastewater; Hydraulic design; Economic indicators; Hidrociencias; Maestría Tecnológica. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2067 |
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| Merlinsky, Maria G.; University of Buenos Aires; merlinsk@retina.ar; LaValle, Alicia; University of British Columbia; av_lavalle@yahoo.com; Morales, Margaret; University of British Columbia; margaret.c.morales@gmail.com; Tobias, Melina M.; University of Buenos Aires; melina.tobias@gmail.com. |
| The need for a radical shift to more iterative and adaptive solutions in sewage management is increasingly recognized, but our ability to achieve such a shift is constrained by inertia to change. Here, we describe planning in two metropolitan areas that are upgrading their sewage systems, based on interviews with central actors and official documents. Using new institutionalism and concentrating on changes in normative, regulative, and cognitive patterns, we analyze if obstacles to the uptake of innovations can be understood in light of how these patterns counteract institutional change. Our aim is to understand obstacles to reformers implementing a wider vision of sewage management. Our study suggests that even though both Buenos Aires and Vancouver... |
| Tipo: Peer-Reviewed article |
Palavras-chave: Inertia to change; Sewage management; Waste vs. resource; Wastewater; Water management. |
| Ano: 2014 |
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| 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 |
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| Oliveira,Jacineumo F. de; Rodrigues,Fernando N.; Fia,Ronaldo; Mafra,Dayana C. B.; Landim,Daniela V.. |
| ABSTRACT The objective of this study was to evaluate the quality of the percolate in soil columns cultivated with Tiffon-grass 85 under different wastewater rates from swine slaughterhouse and dairy. The experiment was conducted at the Department of Engineering at the Federal University of Lavras, in PVC columns with 0.30 m of diameter and 1.2 m deep, filled with Dark Red Latosol cultivated with Tifton-grass 85. The treatments consisted of a (AQT0) control with recommended chemical fertilization for Tifton-grass 85 (300 kg ha-1 year-1 of N), and four doses of SSW and DPW (100, 200, 300 and 400% of the recommendation) in a CRD with 3 replications. The samples of percolated were collected and characterized weekly. The treatments of highest dosage have... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water reuse; Wastewater; Leaching; Soil disposal; Agroindustry wastewaters. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601222 |
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| 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 |
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| KUNZ,AIRTON; MUKHTAR,SAQIB. |
| ABSTRACT Total Ammoniacal Nitrogen - TAN (NH3 + NH4+) in wastewaters cause environmental degradation concerns due to their negative impacts on air, soil and water. Several technologies are available for TAN removal from the wastewaters. One emerging technology is the use of hydrophobic membrane as non-destructive NH3 extraction. In this paper the authors discuss the uses of gas permeable membrane (GPM) and its physicochemical characteristics that influence gas mass transfer rate, diffusion and recovery mechanisms of NH3 from liquid sources (e.g. animal wastewater). Several aspects of NH3 extraction from liquid manure and other TAN generation sources using GPM technology as well as its applicability for NH3 mitigation from liquid effluents and possible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonia; Separation; Wastewater; Nutrient recovery. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200377 |
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| Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P.; Miranda,Suymara T.. |
| ABSTRACT We aimed to evaluate the efficiency of six different horizontal subsurface flow constructed wetlands (HSSF-CWs), with different substrates (gravel and crushed PET bottles), which also varied in relation to the presence and arrangement of plant species (elephant grass and Tifton 85 bermudagrass) in the removal of pollutants from a bulk milk cooling tank (MTWW). Each bed was fed at a flow rate of 0.18 m3 d-1 and average organic load rate (OLR) of 318 kg ha-1 d-1 of BOD5, with hydraulic detention time (HRT) of 1.84 days in the gravel-filled HSSF-CWs (CWS-G) and 2.97 days in the PET-filled HSSF-CWs (CWs-P). The CWs-P were as efficient as the CWs-G in the removal of BOD5, COD, Total-P, and K-Total, being in some cases even more effective (turbidity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Elephant grass; Tifton 85 bermudagrass; Plants; Porosity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300417 |
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| 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 |
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| 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 |
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| CRISOSTOMO, L. A.; WEBER, O. B.; MIRANDA, F. R. de; SOUSA, A. F.; ARAGAO, F. A. S. de. |
| O reuso da água produzida em campo petrolífero pode ser alternativa para irrigação de culturas não alimentares quando não há riscos de contaminação ambiental. Este trabalho teve por objetivo avaliar o aporte de metais pesados na produção das oleíferas girassol (Helianthus annuusL) e mamona (Ricinus communis L.) e do abacaxizeiro ornamental (Ananas comosus var. erectifolius) irrigados com dois tipos de água produzida: filtrada (APF) e tratada por osmose reversa (APO) em comparação à água do subsolo, captada do aquífero Açu (ACA). As concentrações dos metais Ba, Cd, Co, Cr, Ni, Pb e Zn foram avaliadas no solo e nas plantas antes e após a irrigação por três ciclos de girassol, dois ciclos de mamona e um ciclo do abacaxizeiro. Portanto, recomenda-se o... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Salinização; Wastewater; Heavy metals. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1102058 |
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| Martínez, Carlos; Mairet, Francis; Martinon, Pierre; Bernard, Olivier. |
| Microalgae cultivation with wastewater is a promising way of reducing the energetic needs for wastewater treatment and the costs of biofuel production. However, the very turbid medium is not favorable for the development of microalgae. Indeed, light, the key element for photosynthesis, rapidly vanishes along depth due to absorption and scattering. Therefore it is crucial to understand the effects of the depth on turbid cultures. In this work, we study theoretically the long-term behavior of a continuous culture of microalgae exposed to a periodic source of light. By allowing periodic variations of the depth and the hydraulic retention time, we show that the microalgae population is forced to a periodic regime. Finally, we address numerically the problem of... |
| Tipo: Text |
Palavras-chave: Dynamics and control; Industrial biotechnology; Wastewater; Biomass productivity; Microalgae. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00505/61623/65654.pdf |
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| 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 |
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| Theuerkauff, Dimitri; Rivera-ingraham, Georgina A.; Lambert, Sophia; Mercky, Yann; Lejeune, Mathilde; Lignot, Jehan-hervé; Sucré, Elliott. |
| Mangroves are tidal wetlands that are often under strong anthropogenic pressures, despite the numerous ecosystem services they provide. Pollution from urban runoffs is one such threats, yet some mangroves are used as a bioremediation tool for wastewater (WW) treatment. This practice can impact mangrove crabs, which are key engineer species of the ecosystem. Using an experimental area with controlled WW releases, this study aimed to determine from an ecological and ecotoxicological perspective, the effects of WW on the red mangrove crab Neosarmatium africanum. Burrow density and salinity levels (used as a proxy of WW dispersion) were recorded, and a 3-week caging experiment was performed. Hemolymph osmolality, gill Na+/K+-ATPase (NKA) activity and gill... |
| Tipo: Text |
Palavras-chave: Mangrove; Bioturbation; Wastewater; Ecophysiology; Oxidative stress; Osmoregulation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00592/70449/68559.pdf |
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| Registros recuperados: 47 | |
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