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Electrolytic treatment applied to the industrial effluent containing persistent wastes monitored by Bartha respirometric assays BABT
Régis,Gisela; Bidoia,Ederio Dino.
The effluent of a rubber chemical antioxidant and antiozonant producer industry, with high content of organic material was subjected to electrolytic process. To evaluate the speed of stabilization of the eletroctrolyzed effluents, and to evaluate the biodegradation the respirometric test of Bartha and Pramer was used. The monitoring of the biodegradation of the effluent, after different periods of electrolysis show that the ideal time of electrolysis was 10 and 25 min. It was concluded that the eletrolytic process was viable to diminish the adaptation time of the microorganism to the effluent and consequently increased the biodegradation of effluent.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrolytic process; Biodegradation; Wastes pollutant; Electrodes.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200020
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Treatment of simulated wastewater containing n-phenyl-n-isopropyl-p-phenylenediamine using electrolysis system with Ti/TiRuO2 electrodes BABT
Inazaki,Thelma Helena; Pião,Antonio Carlos Simões; Bidoia,Ederio Dino.
This study investigated the effects of the electrolytic treatment in the simulated wastewater with aromatic amine n-phenyl-n-isopropyl-p-phenylenediamine (Flexzone 3P®) using Ti/TiRuO2 electrodes under 0.025 A/cm² (DC) for different electrolysis durations (5; 15; 30; 45 and 60 min). Conductivity, pH, UV-visible spectra, gas chromatograms, toxicity and biodegradation tests were carried out. During the electrolytic treatment the pH decreased and conductivity increased slightly. After 60 min of electrolysis, the concentration of Flexzone 3P decreased by 65.1%. UV-vis spectra and chromatograms of simulated wastewater showed changes in the molecular structure of the aromatic amine. After 5 and 15 min of electrolysis, the simulated wastewater containing the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electrolytic treatment; Wastewater; Ti/TiRuO2 electrodes.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600018
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Studies on the electrochemical disinfection of water containing Escherichia coli using a Dimensionally Stable Anode BABT
Gusmão,Isabel Celeste Caíres Pereira; Moraes,Peterson Bueno; Bidoia,Ederio Dino.
The aim of this work was to investigate the disinfectant effect of electrolysis on chlorine-free water, artificially contaminated with Escherichia coli (CCT-1457) and to evaluate the bactericidal activity of electrolysis and kinetic behavior of a single-cell reactor, with a DSA (Dimensionally Stable Anode) electrode to develop a scaled-up system. A high-density E. coli suspension (10(6) CFU mL-1) was electrolyzed in this reactor at 25, 50 and 75 mA cm-2 for up to 60 min, at flow rates of 200 and 500 L h-1. Bacterial survival fell by 98.9% without addition of chlorinated compounds and a power consumption rate not more than 5.60 kWh m-3 at flow rate of 200 L h-1 and 75 mA cm-2. The process produced a germicidal effect that reached this inactivation rate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: E. coli inactivation; Electrochemical treatment; Electrolysis of microorganisms; Electroxidation process; Bactericidal effect; DSA oxide electrode.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500029
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Biodegradation and toxicological evaluation of lubricant oils BABT
Tamada,Ivo Shodji; Lopes,Paulo Renato Matos; Montagnolli,Renato Nallin; Bidoia,Ederio Dino.
The aim of this work was to compare different toxicity levels of lubricant oils. The tests were performed using the earthworm (Eisenia andrei), arugula seeds (Eruca sativa) and lettuce seeds (Lactuca sativa), with three types of contaminants (mineral lubricant oil, synthetic lubricant oil and used lubricant oil) for various biodegradation periods in the soil. The toxicity tests indirectly measured the biodegradation of the contaminants. The samples were analyzed at t0, t60, t120 and t180 days of biodegradation. The used lubricant oil was proved very toxic in all the tests and even after biodegradation its toxicity was high. The mineral and synthetic oils were biodegraded efficiently in the soil although their toxicity did not disappear completely after 180...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Toxicology; Biodegradation; Lubricant oil; Toxicity bioassay.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000600020
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Evaluation of the biodegradation of different types of lubricant oils in liquid medium BABT
Lopes,Paulo Renato Matos; Bidoia,Ederio Dino.
The aim of this work was to study the biodegradation of different types of automotive lubricant oils adapted to the aqueous medium using a base inoculum and an aqueous inoculum. Four treatments were carried out in two consecutive and similar experiments: T1 (control); T2 (half-synthetic oil); T3 (mineral oil); T4 (used oil). The results showed the following decreasing order of CO2 production in the Bartha and Pramer respirometers: T4 > T2 > T3 > T1. Thus, the used lubricant oil showed with highest biodegradability, followed by the half-synthetic one and the mineral oil. It was also observed that the mineral lubricant presented a longer period of adaptation compared to the half-synthetic one.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodegradation; Lubricant oil; Respirometry; Liquid medium.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500028
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Benzene, toluene and xylene biodegradation by Pseudomonas putida CCMI 852 BJM
Otenio,Marcelo Henrique; Silva,Maria Teresa Lopes da; Marques,Maria Luiza Oliveira; Roseiro,José Carlos; Bidoia,Ederio Dino.
A minimal liquid medium containing benzene (B), toluene (T) and xylene (X) and mixtures thereof, was used to evaluate degradation activity of Pseudomonas putida CCMI 852 containing a TOL plasmid. Experiments were developed with B, T and X (100 mg L-1), with mixtures of BT, BX, and TX (50 + 50 mg L-1 each) and BTX (33.3 + 33.3 + 33.3 mg L-1 each), added to 500 mL of medium. After 18 to 24 hours, the inoculum was added and solvent disappearance was determined after 24 to 25 hours by GC. Results showed that P. putida CCMI 852 was able to metabolize T and X, but B was not metabolized. In a BTX mixture, B was not metabolized and T and X degradation rate decreased 50%.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudomonas putida; Biodegradation; BTX; Plasmid TOL.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300010
Registros recuperados: 6
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