Characterizing the paper industry sludge for environmentally-safe disposal

Azevedo, Afonso Rangel Garcez de; Alexandre, Jonas; Pessanha, Luís Sérgio Peixoto; Manhães, Rosane da Silva Toledo; Brito, Jorge de; Marvila, Markssuel Teixeira

doi:10.1016/j.wasman.2019.06.001

Cited by 80 publications

(25 citation statements)

References 44 publications

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“…To make ceramic blocks, a kaolinite clay mass from the city of Campos dos Goytacazes-RJ, Brazil, which presented the same parameters of physical, chemical, and mineralogical characterization, indicated by other researchers who studied the same clay [21][22][23], was used. The ceramic blocks were produced using an Eco Master 7000 Turbo II press, with hydraulic control, 7.5 hp engine, and compression load up to 360 kN.…”

Section: Methodsmentioning

confidence: 99%

Analysis of deformability modulus by linear and nonlinear elastic methods in ceramic structural masonry and mortars

Cerqueira¹,

Marvila²,

Azevedo³

et al. 2020

Cerâmica

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There are studies analyzing the parameters of structural masonry strength, however few are performed evaluating the interference of the mortar in the deformability parameters. The objective of this study was to verify the theories of elasticity (Hooke’s linear model and nonlinear models by Ghosh, Duffing, and Martin, Roth, and Stiehler) applied to structural masonry. Ceramic blocks were pressed and fired at 890 ºC and mortars prepared with the proportion 1:1:5:0.5:2 of cement: hydrated lime: sand: PVA binder: water. The materials were tested in compression individually and in prisms with and without the use of mortars. The results obtained with the linear elastic analysis were incoherent since the deformability modulus obtained for the mortar prisms was higher than those without mortar. Performing the analysis by nonlinear theories, it was found that the results obtained were more coherent, mainly by Duffing’s theory that uses one parameter for stiffness and another for damping of the material.

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Section: Methodsmentioning

confidence: 99%

Analysis of deformability modulus by linear and nonlinear elastic methods in ceramic structural masonry and mortars

Cerqueira¹,

Marvila²,

Azevedo³

et al. 2020

Cerâmica

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“…In addition, reference 1 : 1 : 6 mortars (REF116) show lower workability than 1 : 2 : 9 mortars (REF129) due to the comparatively greater amount of cement and minor amount of hydrated lime. is behavior is usually found in mortars and has been reported [20][21][22][23][24]. us, it is found that the composition of mortars directly affects the workability parameters of the material, where mortars with finer particles (such as marble residue) show an increase in workability.…”

Section: Analysis Of Materials Compositionmentioning

confidence: 85%

Study of the Compressive Strength of Mortars as a Function of Material Composition, Workability, and Specimen Geometry

Marvila¹,

Azevedo²,

Alexandre³

et al. 2020

Modelling and Simulation in Engineering

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In the present work, the statistical dispersion of the mortar compressive strength as a function of the geometric parameters of the specimens as well as the effect of the mortar workability difference on the compressive strength was investigated. For this purpose, specimens were prepared for six types of mortars: two conventional mortars in the proportions of 1 : 1 : 6 and 1 : 2 : 9 of cement, hydrated lime, and sand, respectively, two with clay replacing lime, and two with marble waste in place of lime. The results confirm the difference between the results found for the two geometries due to the differences in the heights of the molding layers and show that the workability of the mortar modifies the resistance properties, especially in the cylindrical mold where the molding of the specimens is more complex. By comparing the differences between the destructive test results and those defined by the Finite Element Modeling (FEM) for conventional mortars, it was clear that the effect of excess material in the sample during the compression tests did not change the strength properties studied. This facilitates the performance of the assay as specimens may be used excessively on the side without the need for sample rectification.

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“…In any case, today, one of the outcomes of worldwide urbanization is an expanded measure of solid Waste. The world paper industry produces a great amount of industrial solid waste that undergoes a treatment process that can be primary, secondary, or tertiary, in order to adapt the waste for correct disposal [5]. Electronic waste or E-waste is one of the main sources of harmful toxic pollutants (polyvinyl chlorides, polychlorinated biphenyls, lead and mercury).…”

Section: Introductionmentioning

confidence: 99%

Amount of Waste used for Different Purposes: A Socio-ecological Impact

Ghosh

Pal

Biswas

et al. 2020

IJECC

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Waste is a ceaselessly developing issue at worldwide and territorial just as at neighborhood levels. Due to vigorous globalization and product proliferation in recent years, more waste has been produced by the soaring manufacturing activities. The social ecology of waste recycling implies the structural, functional and managerial intervention of waste generation process. The specific objective of the research was to isolate and identify the system variables characterizing and the management of waste recycling process and to estimate intra and inter level of interaction amongst and between the variables for respective, inductive and interactive contribution. The present study takes a look into the approach, process and impact of ongoing waste management process, followed by the both kalyani and jalpaiguri municipalities. A set of agro-ecological, socio-economic and techno managerial factors have been developed by selecting two sets of operating variables: Independent Variables: Age(x1), Education(x2), Family member(x3), Total cost of energy(x4), Household land(x5), Income(x6), Expenditure of family(x7), Volume of waste generation per household(x8), Water consumption per day(x9), Total bio diversity(x10), Impact of waste management on health(x11), Impact of waste management on agriculture(x12), Impact of waste management on livestock(x13), Impact of waste management on water(x14), Impact of waste management on soil(x15), Impact of waste management on micro flora and fauna(x16), Exposure to media(x17),Training received(x18), Participation on waste recycling programmer (x19), Perception on environmental impact of waste management(x20), Waste management at household level with value addition by percentage (x21a), Waste management at household level with value addition by percentage (x21b). Dependent variables: Volume of waste used for different purposes (y1). The following independent variables have come out with stark contribution on this consequent variable. Result suggested that in terms of variable, behavior and responses there have been stark differences between jalapaiguri and kalyani municipal areas. In kalyani, some few variables like perception of environmental impact on waste management, waste management at household level with value addition by percentage, impact of waste management on agriculture have recorded the distinct contribution on volume of waste used for different purposes and in jalpaiguri total household land, volume of waste generation from household, water consumption per day have gone in the determinant way. So, in kalyani and jalpaiguri municipal areas these variables have maximum influence on the dependent variable. Household wastes mostly are bio degradable in nature. It can be converted to organic manure which has a great nutritional value for plants and if these bio wastes can be converted into organic manure then amount of waste will be reduced. Not only bio waste but we can use non bio degradable wastes for energy production also.

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Characterizing the paper industry sludge for environmentally-safe disposal

Cited by 80 publications

References 44 publications

Analysis of deformability modulus by linear and nonlinear elastic methods in ceramic structural masonry and mortars

Analysis of deformability modulus by linear and nonlinear elastic methods in ceramic structural masonry and mortars

Study of the Compressive Strength of Mortars as a Function of Material Composition, Workability, and Specimen Geometry

Amount of Waste used for Different Purposes: A Socio-ecological Impact

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