The search of the biotechnological ways to the integral use of the wastes generated by the coffee and citric agroindustries, is a current problem. The biotransformation of coffee pulp and orange mesocarp during aerobic and anoxic fermentation with the pectinolític yeast Kluyveromyces marxianus CCEBI 2011 was studied in this research. It was found that coffee pulp is a better...
OBITUARIO Nuestro respeto y agradecimiento al Dr. René Viera Beltrán (1937-2015), maestro de la Ingeniería Química cubana Our respect and gratitude to Dr. René Viera Beltrán (1937-2015), master of the Cuban Chemistry Engeneering MSc. Romelia Hing CortónFacultad de Ingeniería Química, Universidad de Oriente, Santiago de Cuba, Cuba. [email protected] René Viera Beltrán fue un...
The overall objective of this paper is to use the SPC to assess the possibility of improving the process of obtaining a sanitary device. As specific objectives we set out to identify the variables to be analyzed to enter the statistical control of process (SPC), analyze possible errors and variations indicated by the control charts in addition to evaluate and compare the results...
The present work studies the ability of coconut shell activated to adsorb metal ions present in the residual waste acid leaching of lateritic coal. Experiments were performed in laboratory scale batch reactor with magnetic stirring, to the following conditions: agitation speed of 200 rpm, temperature 21 °C, contact time 20, 40 and 60 min. As a result adsorption percentages up to...
The effect of the extremely low frequency oscillate magnetic field (LEF-OMF) was evaluated on the viability of three probiotics cultures for yogurt: Lactobacillus acidophilus, Lactobacillus casei and Bioyogurt. The cultures inoculated in 50 mL of 9% not fatty milk were treated CMO-FEB of 60 Hz and density from 1 to 20 Gauss (G) during 10 to 60 min, according to of D-optimum...
The genus Pleurotus spp. presents a ligninolytic multi-enzyme complex, within which are laccases (EC 1.10.3.2, p-diphenol:dioxygen:oxidoreductase). These are part of the enzyme group called oxidases blue unlike most produce reduce oxygen and water instead of peroxide. In this work, is evaluated the laccase activity of three strains: Pleurotus ostreatus CCEBI 3021, Pleurotus...
The results of the application of the process of reduction by coal to the solid residuals of the company “Rene Ramos Latour”, belonging to the town of Nicaro in Cuba, for the obtaining of pig-iron nuggets, being the processes that use rotary heart furnace the most feasible from the economic and environmental technical point of view. The complete factorial experimental design is...
In the present investigation is carried out a technological evaluation of the calcium carbonated benefit process, firstly was made a chemical and granulometric characterization of the material using dry screening analysis using the following combination sieve: 1,98; 1,4; 1; 0,83; 0,30; 0,15; 0,074 y 0,045mm, the technique of diffraction laser HORIBA was also used to determine the...
Presently work theoretical-experimental aspects of the leaching process are exposed ammonia-carbonate, new procedures are described that increase the nickel and cobalt recovery, characterized by the treatment attended with ultrasonic, for the aditivation process with chemical products of national production, substitution of CO2 in the turbos for the air, to a ≥ 60 g/L...
Adding fresh liquor through the 5th ring in still 208 of distilling liquor product (liquor obtained as a result of ammonium carbonate leaching of lateritic ore) in the “Comandante Che Guevara” industry, were evaluated with the objective of reducing the dissolved nickel content of the effluent there from, as well as to improve the characteristics of the nickel carbonate which is...
The equations of energy balance were determined in a kiln of drying wood and the energy consumption was calculated for three values of initial moisture: 62, 72 and 82 % base dry. The dimensions of the drying chamber are: 5,81 X 1,66 X 2,23 m (Length X Height X Width), the wooden volume, white cedar, is of V=10,93 m3. The biggest energy consumption was obtained in the stage 1...
The search of the biotechnological ways to the integral use of the wastes generated by the coffee and citric agroindustries, is a current problem. The biotransformation of coffee pulp and orange mesocarp during aerobic and anoxic fermentation with the pectinolític yeast Kluyveromyces marxianus CCEBI 2011 was studied in this research. It was found that coffee pulp is a better...
Small-scale bioreactors are widely used for experimentation in microbiological laboratories. Currently, the price of these systems is in the order of € 20 000, which obstructs its acquisition. A homemade stirred tank system, with easily available and inexpensive resources, was designed and assembled so that meets the essential requirements for the establishment of microbial...
To produce Jatropha curcas L oil-based lubricants with good oxidative stability, refined Jatropha curcas L oil was chemically modified. The epoxidation is carried out using peracid formed in situ, by reacting a carboxylic acid with concentrated hydrogen peroxide. The physicochemical properties of the epoxidized Jatropha curcas L oil, such as: iodine value, density, dynamic...
This paper contains the results of the rheology of water emulsions of Cuban crude petroleum PE and HE, employing emulsifier agent EM-10 prepared with pyrolysis products of sugar cane straw or bagasse In the same emulsion formulations were analyzed and determined the rheological behavior to prepare, and then spend 24 hours standby. The investigation confirmed that the crude PE and...
Once aluminium is extruded, in contact with oxygen, forms quickly an aluminium oxide superficial protector layer, which is not penetrated by humidity, gases or polluting agents. This layer has a low thickness and is a bad base for painting anchorage. Through the chemical superficial treatment of the aluminium profile (degreased, deoxidized and cleaning), it is possible its...
One of these days’ environmental problems is the contamination of soils by hydrocarbons due to bad practices and oil and its derivatives handling accidents. In this work laboratory level treatability essays have been doing, using anaerobic digestion muds and pleurotin to stimulate and bioaugment, respectively, the indigenous population of hydrocarbons contaminated soil. The...
The present work offers the results from the realized investigation to laboratory scale for the obtaining of nickel hydroxide with characteristic such that can be used for the production of batteries, catalysts and pigments, among other applications. It was determined the influence of the temperature, the pH and the time of retention in the efficiency of nickel precipitation...
Scientometrics is the metric specialty that applies mathematical methods and models to discipline or knowledge domain. It therefore seeks to study examining the international scientific literature on the subject: Sugarcane and Applied Chemistry. The study aims to provide relevant information to the scientific who publishing topics related to chemistry as a discipline of knowledge...
The biosorption is considered an alternative technology for removal of heavy metals from wastewater and the use of seaweeds as adsorbents encourages scientific interest, considering the variety, abundance and availability of different species growing or arriving at the coastal shoreline. The aim of the research was to characterize a seaweed biosorbent prepared from marine algae...
This paper presents a study of the physical-chemical parameters of crude CPNM-1400 and M-30 that were measured before and after magnetic treatment; in order to evaluate the effect of a static magnetic field on said parameters. Passing oil sample M-30 by a magnetic conditioner 0.4550 ± 0.009 T, is able to separate up to 52.8% of the water present in the sample. No evidence of the...
It is of great importance for the protection of the environment the use of biogas plants. This work has as objective the presentation of an alternative for the energy use of the trash of malted barley. He/she is carried out a characterization of the process of obtaining of beer Hatuey, identifying the different ones residual generated and the use of the trash of malt with energy...
Small-scale bioreactors are widely used for experimentation in microbiological laboratories. Currently, the price of these systems is in the order of € 20 000, which obstructs its acquisition. A homemade stirred tank system, with easily available and inexpensive resources, was designed and assembled so that meets the essential requirements for the establishment of microbial...
To produce Jatropha curcas L oil-based lubricants with good oxidative stability, refined Jatropha curcas L oil was chemically modified. The epoxidation is carried out using peracid formed in situ, by reacting a carboxylic acid with concentrated hydrogen peroxide. The physicochemical properties of the epoxidized Jatropha curcas L oil, such as: iodine value, density, dynamic...
This paper contains the results of the rheology of water emulsions of Cuban crude petroleum PE and HE, employing emulsifier agent EM-10 prepared with pyrolysis products of sugar cane straw or bagasse In the same emulsion formulations were analyzed and determined the rheological behavior to prepare, and then spend 24 hours standby. The investigation confirmed that the crude PE and...