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wastes processing » data processing (Expander búsqueda), stir processing (Expander búsqueda), seeds processing (Expander búsqueda)
1
artículo
Publicado 2010
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Se ha identificado que los actinidos (An) en medio acuoso se coordinan a nueve moléculas de agua para formar complejos de fórmula [An(H2O)9]3+. Esto es importante porque puede ayudar a entender el comportamiento de estos elementos en los desperdicios nucleares, lo cual podría ayudar a la implementación de métodos más eficientes para el tratamiento de dichos desperdicios y así reducir, o evitar, el daño que estos ocasionan al ambiente.
2
artículo
The aim of this study was to extract collagen from the waste produced in the processing of anchovies (canned and surimi). To this end, non-collagenous proteins was solubilized with a solution of 0,1N sodium hydroxide and neutralized with successive washes with water (pH close to neutral). Then, the residues were decalcified with a EDTA 0,5M solution; degreased with butanol 10% and finally the collagen protein were solubilized with acetic acid 0,5M and precipitated with sodium chloride 2,6M. Collagen precipitated was dialyzed and lyophilized. The hydroxyproline content (Hip) were quantified in waste and lyophilized collagen, getting the values of 6,5 and 52,9 mg of hydroxyproline/g sample, respectively. The solubility of lyophilized collagen decreased about 40% at a concentration of 12% NaCl. Gel electrophoresis showed a strong band of approximately 110 kDa molecular weight that correspon...
3
artículo
Publicado 2001
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The present work deals with the proposed treatment scheme for the recovery of PVC and PET using mineral processing operations such as: size reduction. Separation by dense means, alkaline treatment and flotation. The results achieved at the laboratory level indicate that 95% of PVC and 97% of PET can be recovered from the selected sample of plastic containers collected in a residual sector of the city of Bucaramanga, Colombia.
4
artículo
Publicado 2001
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The present work deals with the proposed treatment scheme for the recovery of PVC and PET using mineral processing operations such as: size reduction. Separation by dense means, alkaline treatment and flotation. The results achieved at the laboratory level indicate that 95% of PVC and 97% of PET can be recovered from the selected sample of plastic containers collected in a residual sector of the city of Bucaramanga, Colombia.
5
artículo
Publicado 2023
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During their university years, the student of architecture carries out several hands-on works that are essential for their academic development such as the making of models, plans, and reports that are mostly discharged later without considering their value. Therefore, the aim of this research was to analyze the management of solid waste generated in the FAUA-UPAO Architecture Program, considering the principles of the 5Rs and the recycling culture that students have. For this, the waste produced was sorted out based on its lifetime and toxicity level. Secondly, 218 surveys were applied to students chosen under simple random sampling probability in order to know their ecological habits and their predisposition for recycling, obtaining an estimate of the amount of materials used and discarded at the end of the academic semester; likewise, an interview was conducted with the university boa...
6
artículo
DESIGN PROCESS FOR THE TREATMENT OF URBAN SOLID WASTE (USW) GENERATED IN THE CONE NORTH OF LIMA CITY
Publicado 2003
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In this work we present the design of a Process for the treatment of the urban salid wastes (USW) produced in the northern part of Lima. The plant will be installed in the district of Puente Piedra, region of Lima. The treatment capacily is of 1500 TM/day and ethanol, methane and diesel 2 has been produced of added value, also a higher reduction is achieved to 80% in volume of USW destination at present to the final disposition in the sanitarias fillings fields of Zapallal and The Vizcacha. The impact of the implementation ol this process will be positive so much in the technological, economic and environmental aspects.
7
artículo
Publicado 2008
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In Peru, work has been carried out in the area of solid mining waste from the mineral flotation process since 2000, where the Ministry of Energy and Mines begins to carry out the inventory of mining environmental liabilities related to abandoned mining activities where it involves acidic waters, dumps, manholes and mining tailings, respectively; coming to the end to prepare the law 28271, law of regulation of the environmental liabilities of the mining activity, promulgated on July 2, 2004. In the Santa river basin the inventory of 153 mining environmental liabilities has been carried out, reaching the conclusion the urgency of conducting research studies to control the alarming contamination of the physical environment in this basin. At the end of the project, it establishes the preliminary technical parameters at the pilot level in relation to the granulometric and mineralogical ...
8
artículo
Publicado 2022
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The research aimed to determine the differences in the influence of cognitive processes on the intention to segregate solid waste between university women and men. The cognitive processes studied are explained using the theory of protection motivation as a basis. The study sample was 189 students from a public university, stratified into 97 women and 92 men. For inferential statistics, the normality test and simple linear regression analysis were used. The results indicate that there is a significant positive influence of cognitive processes on the intention to segregate. It was also evidenced that, although women show a greater influence, the difference with men is not significant. It is concluded that, although it is important to take into account the difference in the influence of the cognitive processes of women and men when designing segregation programs in universities; apparently,...
9
artículo
Publicado 2016
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This paper presents a study that aimed to determine the mechanism of a process for Cr(VI) removal from aqueous solutions, using compost of carnation crop residues as the adsorbent. We assessed whether the microbiota present in the absorbent material affected the removal of Cr(VI) using respirometric measurements and evaluating the removal capacity using sterilized and not sterilized compost. Additionally, the compost was analysed before and after carrying out the Cr(VI) removal process, by quantification of the acidic functional groups and kinetic monitoring of pH, conductivity and redox potential difference. The results showed that, under the conditions used, the microorganisms present in the compost did not affect the process of Cr(VI) removal and that the mechanism can be described by an adsorption model coupled to the reduction, were this adsorption is mainly done on the acidic funct...
10
artículo
Publicado 2022
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Compost is a natural fertilizer that is obtained from the use of solid organic waste, limiting the environmental impact that it causes. The purpose of this investigation was to determine the influence of Mende and water in the pH stabilization, and the efficiency of the compost made from waste from green areas of the District of Tacna. A 3x3 multilevel factorial design was used. It was verified that a dose of 1.5 L of Mende and 33.5 L of water achieve a pH of 7.95 and a compost obtaining efficiency of 38.80 %. After laboratory analysis, it was determined that this compost managed to meet the internationally required parameters (temperature, organic matter, C/N ratio, humidity, total nitrogen, phosphorus and potassium) in the EPA 40CFR 503, Mexico NTEA-006 – SMA-2006 and Chile Nch 2880 2004. It was concluded that it is possible to take advantage of the waste from green areas in the city...
11
tesis de grado
Publicado 2025
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Este trabajo de tesis consiste en el diseño e implementación de un mando secuencial para el control de la perilla de enfoque de un microscopio estereoscópico NIKON SMZ1000. El apilamiento de imágenes consiste en la toma de fotos a distintas distancias focales, para luego realizar un apilamiento de imágenes y obtener una imagen con enfoque total. Para lograr esto, el tornillo de enfoque mueve el cabezal del estereoscopio varios pasos de manera secuencial y precisa. Este proceso fue programado para trabajar en un desplazamiento delimitado y un aumento configurados por el usuario. Mediante un motor paso a paso, la perilla avanzara un paso a la vez hasta llegar a la posición final. Entre cada paso, una cámara DSLR (del inglés Digital single-lens reflex camera) ubicada en el trinocular superior tomara la fotografía. Tras finalizar la serie, el conjunto de imágenes finales puede ser ...
12
artículo
Publicado 2020
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In this research work of quantitative approach, the general objective was to determine the noncompliance factors of the waste control protocol based on the methodology proposed by the Committee of Sponsoring Organizations of the Treadway. This methodology was applied in a &nbs...
13
artículo
In this work an alternative is presented for the wastewater treatment in the University City of the UNMSM with the use of wetlands. Many «natural systems» they are being considered with the purpose of the wastewater treatment and control of the contamination of the water. The interest in the natural systems this based on the conservation of the resources associated with these systems like opposed to the process of conventional for wastewater treatment that is intensive regarding the energy use and chemical. The wetlands are one of the many types of natural systems that can be used for the treatment and control of the contamination. According to U.S. EPA (1983). «A wetland is built specifically with the purpose of to control the contamination and to manage the waste, in a place where a natural wetland exists. The form in that these wetlands works has similarity with the biological proc...
14
artículo
An integrated approach to the design and analisis of heat exchanger networrks (HEN) Is outlined. A case study is used, carminic acid,, to illustrate this integrated approach, to emphasize the economy of 60% energy with respect to convectional process.
15
artículo
Publicado 2003
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En este trabajo se propone un proceso para el tratamiento de los residuos sólidos urbanos (RSU) generados en el cono norte de Lima. La planta se instalará en el distrito de Puente Piedra, región de Lima. La capacidad de tratamiento es de 1500 TM/dia y se produce etanol, metano y diesel 2 como productos de valor agregado, asimismo se logra una reducción superior al 80% en volumen de RSU destinados actualmente a la disposición final en los rellenos sanitarios de Zapallal y La Vizcacha. El impacto de la implementación de este proceso será positivo tanto en los aspectos tecnológico, económico y ambiental.
16
artículo
The aim of this work is the evaluation of both adsorption-desorption mechanisms of hexavalent chromium in two metallurgical wastes. These processes were investigated using batch tests. Theses wastes correspond to the metallurgical processes of Ni-Co recovery in Cuban industries. The first one (called SAL-waste) is originated by sulphuric acid leaching and the second one (ACL-waste) is the by-product of ammonia-carbonate metallurgical leaching. The wastes are mainly constituted by iron minerals. Grain size distribution is poorly graded with a average value of diameter is about 0.02 mm. The adsorption isotherms of Cr in ACL and SAL are strongly non-linear and well described by the Freundlich equations (S = Kf Cn w). Desorption isotherms of Cr in both wastes are near-linear and illustrate very well the presence of a hysteretic process. The time of Cr adsorption short and desorption is very ...
17
artículo
The aim of this work is the evaluation of both adsorption-desorption mechanisms of hexavalent chromium in two metallurgical wastes. These processes were investigated using batch tests. Theses wastes correspond to the metallurgical processes of Ni-Co recovery in Cuban industries. The first one (called SAL-waste) is originated by sulphuric acid leaching and the second one (ACL-waste) is the by-product of ammonia-carbonate metallurgical leaching. The wastes are mainly constituted by iron minerals. Grain size distribution is poorly graded with a average value of diameter is about 0.02 mm. The adsorption isotherms of Cr in ACL and SAL are strongly non-linear and well described by the Freundlich equations (S = Kf Cn w). Desorption isotherms of Cr in both wastes are near-linear and illustrate very well the presence of a hysteretic process. The time of Cr adsorption short and desorption is very ...
18
artículo
Publicado 2023
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The province of Soto Norte (Santander), Colombia, is known for its mining tradition in the municipalities of Vetas and California. Four centuries ago, mining exploitation was developed and environmental liabilities were generated, which put at risk in activity. Many defend the topographic and vegetal restoration of exhausted mining operations, burying them or sealing them. However, when these works have brought out mineral outcrops of worldwide interest or have allowed access to galleries excavated many centuries ago that have provided valuable archaeological remains that have served to learn a little more about our history. Therefore, in the face of the generally accepted idea that the restoration of a mining waste inevitably passes through its burial or sealing. Geotourism around the mining industry is an emerging sector that contributes not only to the diffusion of the interesting geo...
19
tesis de maestría
Publicado 2006
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La empresa Agrícola Chapi tiene más de quince años operando en el mercado nacional estando dedicada a la producción y comercialización de productos agrícolas siendo su principal producto el espárrago. Este producto es considerado commodity porque no es procesado bajo una marca específica y el precio está determinado por las leyes de la oferta y demanda del mercado internacional. El Perú es uno de los pocos países que cuenta con el tipo de suelo y clima para tener una producción constante de espárrago en todas las épocas del año, sin embargo, es China, el país que mayor cantidad de producción exporta por facilidad de acceso a mejores tecnologías, fuentes de financiamiento y mano de obra económica. Otra de las características del mercado de este producto es que es mayor la demanda que la oferta, por lo cual en la mayoría de casos la producción está vendida antes de s...
20
artículo
Publicado 2006
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Hazardous wastes include those materials due to their corrosive, reactive, explosive, toxic, flammable or biohazard characteristics, pose a risk to human health and the environment when handled improperly. The type of treatment depends on the characteristics of the waste. The most commonly used treatments are physical, chemical. biological and thermal. Treatment processes also generate waste, which must be deposited in a special landfill or security deposit.
