Edixon C Gutierrez G | Universidad Rafael Urdaneta (original) (raw)

Papers by Edixon C Gutierrez G

Revista Técnica de la Facultad de Ingeniería Universidad del Zulia

ABSTRACT

Mosaico …, 2006

RESUMEN Las características fisicoquímicas y microbiológicas de la leche de cabra criolla fue-ron... more RESUMEN Las características fisicoquímicas y microbiológicas de la leche de cabra criolla fue-ron estudiadas a través de un período de lactación, obteniéndose los siguientes valores medios en lactaciones de 14 a 18 semanas: acidez titulable (14, 53+ 2, 06 ºD), pH (6, 70+ ...

Total concentrations and chemical forms of metals in superficial sediments of the MiddleOrinoco w... more Total concentrations and chemical forms of metals in superficial sediments of the MiddleOrinoco were determined with acetic acid solution 25% (v/v)/HNO3: HCl: HClO4 (3:2:1) solution,atomic absorption spectrometry with air acetylene flame and cold vapor technique. Totalvalues ranged from 8871 to 116759 μgFeg-1, 102.45 a 469.44 μgMn g-1; 0.93 to 17.64 μgCu g-1;4.46 to 17.48 μgNi g-1; 2.46 to 9.61 μgCo g-1; 42.56 to 181.45 μgZn g-1; 1.29 to 8.76 μgCr g-1; 0.03to 0.74 μgCd g-1 and 0.001 to 7.88 μgPb g-1. The metals were found to be strongly associated with the residual fraction minerals, more resistant iron oxihidroxides, metallic sulfides, and organicmatter. The values ranged from 7.50-99.29% Fe; 7.75-66.34% Mn; 22.55-98.89% Zn; 22.85-91.36% Ni; 4.20-85.03% Cu; 16.76-85.48% Co; 12.56-95.49 Cr; 7.50-99.29% Pb; 2.03-85.48%Cd). The values of metals adsorbed in the surface of particles, associated with carbonates andthe reactive manganese oxihidróxidos varied from 0.04-1.97% Fe; 4.15-71.59...

Boletin Del Centro De Investigaciones Biologicas, 1997

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, 1981

Boletin Del Centro De Investigaciones Biologicas, 2002

Multiciencias, 2003

Venezuela Caldera M., Yaxcelys A.; Madueño M., Pedro I.; Griborio D., Alonso G.; Gutiérrez G., Ed... more Venezuela Caldera M., Yaxcelys A.; Madueño M., Pedro I.; Griborio D., Alonso G.; Gutiérrez G., Edixon C.; Fernández A., Nola M. Efecto del tiempo de retención hidráulica en el funcionamiento de un reactor UASB tratando efluentes cárnicos Multiciencias, vol. 3, núm.

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, 2012

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, Aug 1, 2007

Boletin Del Centro De Investigaciones Biologicas, 1996

Resumen. Con el fin de evaluar el uso o disposición final de la biomasa de la lenteja acuática (L... more Resumen. Con el fin de evaluar el uso o disposición final de la biomasa de la lenteja acuática (Lemna spp.) extraída del Lago de Maracaibo, se realizó la determinación de las concentraciones de metales pesados por EAA en material vegetal y lixiviado de muestras presentes en la zona litoral norte del Lago de Maracaibo. Los intervalos de concentración de los metales en lixiviado (ug/L) fluctuaron de la siguiente manera: As (1,46-7,08), V (1,31-25,41), Cr (10,17-56,72), Ni (20,00-53,00) y Pb (16,(57)(58)(59)(60)(61)(62)(63)(64)(65)(66)(67)(68)30). En biomasa (ug/g) los intervalos fueron: As (0,15-1,96), V (0,73-15,73), Cr (10,57-50,83), Ni (8,59) y Pb (1,46-37,97). Las concentraciones de los metales evaluados en el lixiviado y material vegetal no presentaron características para que éste sea clasificado como un material o desecho peligroso, según la normativa en Venezuela, por lo que puede ser tratado como un desecho orgánico, utilizándose como alimento para ovinos y porcinos o como fertilizante. Recibido: 30 marzo 2006, aceptado: 29 noviembre 2006. Palabras clave: Lemna spp., metales pesados, contaminación, Lago de Maracaibo, Venezuela, lenteja acuática. HEAVY METALS IN DUCKWEED (LEMNA SPP.) FROM LAKE MARACAIBO COASTAL AREA Abstract. With the purpose of evaluating the potential use or final deposition of duckweed (Lemna spp.) biomass, extracted from Lake Maracaibo, we determined heavy metal concentrations by EAA, in lixiviate and vegetable material in samples collected from the northern coast of Lake Maracaibo. Concentrations (range) in lixiviate (ug/L) were: As (1,46-7,08), V (1,31-25,41), Cr (10,17-56,72), Ni (20,00-53,00) y Pb (16,57-68,30), and concentrations (range) in biomass (ug/g) were: As (0,15-1,96), V (0,73-15,73), Cr (10,57-50,83), Ni (8,20-68,59), and Pb (1,46-37,97). Metal 114

The acclimatization of mesophilic granular sludge to thermophilic condition (55±1°C) was studied ... more The acclimatization of mesophilic granular sludge to thermophilic condition (55±1°C) was studied on anaerobic batch reactor treating water from oil production. The sludge used coming from a brewer industry and the water coming from the oil production of the national oil company. The study was doing on three batch reactor of 500ml of capacity, treating water from the extractions of light (R1), medium (R2) and heavy oil (R3). The reactors were connected to a three biogas collectors. The HRT was 24 hours. The results show the convenience of the gradual increase of the temperature to reach thermophilic condition. The COD removal and methane content for the reactors were 75.7% and 61.7% for R1, 61.3% and 76.6% for R2, and 75.5% and 72.8% for R3.

Anaerobic thermophilic treatment (55±1°C) of water from oil production, was carried out using an ... more Anaerobic thermophilic treatment (55±1°C) of water from oil production, was carried out using an UASB Plexiglas reactor of 1.8 liters. The reactor was coupled to a re-circulation bath. As sludge seed was used mesophilic granule sludge from a brewery industry and the influent was used water from the national oil company. The system was evaluated in terms of COD, TSS, TSV, alkalinity, pH, biogas production, methane content, and VFA. The reactor was started under mesophilic condition and then the temperature was increased gradually until termophilic condition. When the stable condition was reached given by COD removal and methane content approximately constant, the hydraulic retention time (HRT) was change from 24h to 18 h and then to 12h. The results showed the convenience of a gradual temperature increase to reach termophilic condition. The pH was between 7.2-8.0 during the experiment. The alkalinity was above 2100mgCaCO 3 /l without alkalinity addition. The COD percentage removal was between 70-90%, and the methane content among 80%. The results indicate the feasibility of using the anaerobic system like UASB reactor, as an alternative to the physical-chemical process used to treat the water from oil production.

Revista Técnica de la Facultad de Ingeniería Universidad del Zulia

The maximum permissible limit for cyanide in lhe industrial eflluent treatcd in lhe process ef!1u... more The maximum permissible limit for cyanide in lhe industrial eflluent treatcd in lhe process ef!1uenl Lreatmeni system (PETS1. has shown devlations wilh respecl to the standing enVironmental standards of 0,2 mg/J. Samples from dlfferenl points of the treatment syslem were analyzed [or cyanide contenL according to method of COVENIN standard 4:6-223. The adsorption of cyanide in aclivated sludge. the effect of lhe pH on lhe removalusing [enic chloride and the effect of chlorinalion on the removal of residual cyanide were investigated . It was determined lhat lhe hemical precipilation reacUon Lhal uses fenic chIoride proceeds up to 98% ir the water pH ls kept within the range of 6 to 8 . IL was also proved Lhe cyanide adsorption OCUITS in lhe aclivaled sludge and that cyanlde removal by chlorinaUon reac110n proceeds if a dosage or 29. 5 kg of C12/d is maintained.

Se evaluó el tratamiento aeróbico de dos efluentes industriales, utilizando reactores biológicos ... more Se evaluó el tratamiento aeróbico de dos efluentes industriales, utilizando reactores biológicos rotativos de contacto (RBC) bajo condiciones mesofílicas. El caudal sometido a tratamiento fue de 5,2 mL/min con un tiempo de retención hidráulico de 24 h. El RBC de 9,5 l estaba provisto de 50 discos (área de contacto total 2,443 m ). La carga orgánica promedio aplicada con las aguas de producción petrolera fue de 2,04 ± 0,27 g DQO/m d y con el efluente cárnico se incrementó progresivamente (7,59 ± 0,83; 12,09 ± 0,40; 20,01 ± 0,96 y 24,45 ± 1,21 g DQO/m d), debido al alto contenido de materia orgánica en la muestra inicial (12250 mg DQO/l). Se evaluaron los siguientes parámetros: demanda química de oxígeno (DQO), pH, alcalinidad total, sólidos suspendidos totales (SST) y sólidos suspendidos volátiles (SSV). Para el efluente cárnico, los resultados muestran que el sistema remueve eficientemente altas concentraciones de materia orgánica, obteniéndose 87,9 ± 5,2% como valor promedio de remoción de DQO, para una carga orgánica promedio de 15,67 ± 6,73 g DQO/m d. Para el efluente petrolero, se encontró 76,1 ± 5,9% como valor promedio de remoción de DQO. Es necesario evaluar un postratamiento para disminuir los valores de los parámetros fisicoquímicos evaluados a los límites de descarga permisibles a cuerpos de aguas superficiales establecidos por las normas venezolanas.

Revista Técnica de la Facultad de Ingeniería Universidad del Zulia

ABSTRACT

Mosaico …, 2006

RESUMEN Las características fisicoquímicas y microbiológicas de la leche de cabra criolla fue-ron... more RESUMEN Las características fisicoquímicas y microbiológicas de la leche de cabra criolla fue-ron estudiadas a través de un período de lactación, obteniéndose los siguientes valores medios en lactaciones de 14 a 18 semanas: acidez titulable (14, 53+ 2, 06 ºD), pH (6, 70+ ...

Total concentrations and chemical forms of metals in superficial sediments of the MiddleOrinoco w... more Total concentrations and chemical forms of metals in superficial sediments of the MiddleOrinoco were determined with acetic acid solution 25% (v/v)/HNO3: HCl: HClO4 (3:2:1) solution,atomic absorption spectrometry with air acetylene flame and cold vapor technique. Totalvalues ranged from 8871 to 116759 μgFeg-1, 102.45 a 469.44 μgMn g-1; 0.93 to 17.64 μgCu g-1;4.46 to 17.48 μgNi g-1; 2.46 to 9.61 μgCo g-1; 42.56 to 181.45 μgZn g-1; 1.29 to 8.76 μgCr g-1; 0.03to 0.74 μgCd g-1 and 0.001 to 7.88 μgPb g-1. The metals were found to be strongly associated with the residual fraction minerals, more resistant iron oxihidroxides, metallic sulfides, and organicmatter. The values ranged from 7.50-99.29% Fe; 7.75-66.34% Mn; 22.55-98.89% Zn; 22.85-91.36% Ni; 4.20-85.03% Cu; 16.76-85.48% Co; 12.56-95.49 Cr; 7.50-99.29% Pb; 2.03-85.48%Cd). The values of metals adsorbed in the surface of particles, associated with carbonates andthe reactive manganese oxihidróxidos varied from 0.04-1.97% Fe; 4.15-71.59...

Boletin Del Centro De Investigaciones Biologicas, 1997

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, 1981

Boletin Del Centro De Investigaciones Biologicas, 2002

Multiciencias, 2003

Venezuela Caldera M., Yaxcelys A.; Madueño M., Pedro I.; Griborio D., Alonso G.; Gutiérrez G., Ed... more Venezuela Caldera M., Yaxcelys A.; Madueño M., Pedro I.; Griborio D., Alonso G.; Gutiérrez G., Edixon C.; Fernández A., Nola M. Efecto del tiempo de retención hidráulica en el funcionamiento de un reactor UASB tratando efluentes cárnicos Multiciencias, vol. 3, núm.

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, 2012

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, Aug 1, 2007

Boletin Del Centro De Investigaciones Biologicas, 1996

Resumen. Con el fin de evaluar el uso o disposición final de la biomasa de la lenteja acuática (L... more Resumen. Con el fin de evaluar el uso o disposición final de la biomasa de la lenteja acuática (Lemna spp.) extraída del Lago de Maracaibo, se realizó la determinación de las concentraciones de metales pesados por EAA en material vegetal y lixiviado de muestras presentes en la zona litoral norte del Lago de Maracaibo. Los intervalos de concentración de los metales en lixiviado (ug/L) fluctuaron de la siguiente manera: As (1,46-7,08), V (1,31-25,41), Cr (10,17-56,72), Ni (20,00-53,00) y Pb (16,(57)(58)(59)(60)(61)(62)(63)(64)(65)(66)(67)(68)30). En biomasa (ug/g) los intervalos fueron: As (0,15-1,96), V (0,73-15,73), Cr (10,57-50,83), Ni (8,59) y Pb (1,46-37,97). Las concentraciones de los metales evaluados en el lixiviado y material vegetal no presentaron características para que éste sea clasificado como un material o desecho peligroso, según la normativa en Venezuela, por lo que puede ser tratado como un desecho orgánico, utilizándose como alimento para ovinos y porcinos o como fertilizante. Recibido: 30 marzo 2006, aceptado: 29 noviembre 2006. Palabras clave: Lemna spp., metales pesados, contaminación, Lago de Maracaibo, Venezuela, lenteja acuática. HEAVY METALS IN DUCKWEED (LEMNA SPP.) FROM LAKE MARACAIBO COASTAL AREA Abstract. With the purpose of evaluating the potential use or final deposition of duckweed (Lemna spp.) biomass, extracted from Lake Maracaibo, we determined heavy metal concentrations by EAA, in lixiviate and vegetable material in samples collected from the northern coast of Lake Maracaibo. Concentrations (range) in lixiviate (ug/L) were: As (1,46-7,08), V (1,31-25,41), Cr (10,17-56,72), Ni (20,00-53,00) y Pb (16,57-68,30), and concentrations (range) in biomass (ug/g) were: As (0,15-1,96), V (0,73-15,73), Cr (10,57-50,83), Ni (8,20-68,59), and Pb (1,46-37,97). Metal 114

The acclimatization of mesophilic granular sludge to thermophilic condition (55±1°C) was studied ... more The acclimatization of mesophilic granular sludge to thermophilic condition (55±1°C) was studied on anaerobic batch reactor treating water from oil production. The sludge used coming from a brewer industry and the water coming from the oil production of the national oil company. The study was doing on three batch reactor of 500ml of capacity, treating water from the extractions of light (R1), medium (R2) and heavy oil (R3). The reactors were connected to a three biogas collectors. The HRT was 24 hours. The results show the convenience of the gradual increase of the temperature to reach thermophilic condition. The COD removal and methane content for the reactors were 75.7% and 61.7% for R1, 61.3% and 76.6% for R2, and 75.5% and 72.8% for R3.

Anaerobic thermophilic treatment (55±1°C) of water from oil production, was carried out using an ... more Anaerobic thermophilic treatment (55±1°C) of water from oil production, was carried out using an UASB Plexiglas reactor of 1.8 liters. The reactor was coupled to a re-circulation bath. As sludge seed was used mesophilic granule sludge from a brewery industry and the influent was used water from the national oil company. The system was evaluated in terms of COD, TSS, TSV, alkalinity, pH, biogas production, methane content, and VFA. The reactor was started under mesophilic condition and then the temperature was increased gradually until termophilic condition. When the stable condition was reached given by COD removal and methane content approximately constant, the hydraulic retention time (HRT) was change from 24h to 18 h and then to 12h. The results showed the convenience of a gradual temperature increase to reach termophilic condition. The pH was between 7.2-8.0 during the experiment. The alkalinity was above 2100mgCaCO 3 /l without alkalinity addition. The COD percentage removal was between 70-90%, and the methane content among 80%. The results indicate the feasibility of using the anaerobic system like UASB reactor, as an alternative to the physical-chemical process used to treat the water from oil production.

Revista Técnica de la Facultad de Ingeniería Universidad del Zulia

The maximum permissible limit for cyanide in lhe industrial eflluent treatcd in lhe process ef!1u... more The maximum permissible limit for cyanide in lhe industrial eflluent treatcd in lhe process ef!1uenl Lreatmeni system (PETS1. has shown devlations wilh respecl to the standing enVironmental standards of 0,2 mg/J. Samples from dlfferenl points of the treatment syslem were analyzed [or cyanide contenL according to method of COVENIN standard 4:6-223. The adsorption of cyanide in aclivated sludge. the effect of lhe pH on lhe removalusing [enic chloride and the effect of chlorinalion on the removal of residual cyanide were investigated . It was determined lhat lhe hemical precipilation reacUon Lhal uses fenic chIoride proceeds up to 98% ir the water pH ls kept within the range of 6 to 8 . IL was also proved Lhe cyanide adsorption OCUITS in lhe aclivaled sludge and that cyanlde removal by chlorinaUon reac110n proceeds if a dosage or 29. 5 kg of C12/d is maintained.

Se evaluó el tratamiento aeróbico de dos efluentes industriales, utilizando reactores biológicos ... more Se evaluó el tratamiento aeróbico de dos efluentes industriales, utilizando reactores biológicos rotativos de contacto (RBC) bajo condiciones mesofílicas. El caudal sometido a tratamiento fue de 5,2 mL/min con un tiempo de retención hidráulico de 24 h. El RBC de 9,5 l estaba provisto de 50 discos (área de contacto total 2,443 m ). La carga orgánica promedio aplicada con las aguas de producción petrolera fue de 2,04 ± 0,27 g DQO/m d y con el efluente cárnico se incrementó progresivamente (7,59 ± 0,83; 12,09 ± 0,40; 20,01 ± 0,96 y 24,45 ± 1,21 g DQO/m d), debido al alto contenido de materia orgánica en la muestra inicial (12250 mg DQO/l). Se evaluaron los siguientes parámetros: demanda química de oxígeno (DQO), pH, alcalinidad total, sólidos suspendidos totales (SST) y sólidos suspendidos volátiles (SSV). Para el efluente cárnico, los resultados muestran que el sistema remueve eficientemente altas concentraciones de materia orgánica, obteniéndose 87,9 ± 5,2% como valor promedio de remoción de DQO, para una carga orgánica promedio de 15,67 ± 6,73 g DQO/m d. Para el efluente petrolero, se encontró 76,1 ± 5,9% como valor promedio de remoción de DQO. Es necesario evaluar un postratamiento para disminuir los valores de los parámetros fisicoquímicos evaluados a los límites de descarga permisibles a cuerpos de aguas superficiales establecidos por las normas venezolanas.