The sludge was characterized according to ABNT NBR /, following the procedures for obtaining leached extract (ABNT NBR /), to classify . Brazilian Association of Technical Norms, in ABNT NBR Procedure for obtention leaching extract of solid wastes (Rio de Janeiro, ), p. 16 8. Brazilian Association of Technical Regulation. Procedures for obtainment of leaching extract from solid residues. Rio de Janeiro: ABNT (NBR ).
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Revista Escola de Minas, 68 3 The atomic absorption spectroscopy corroborated results found from chemical analysis since highlighted certain elements such as manganese, iron and aluminum in quantities above those permitted by the NBR No.
The results show all samples are hazardous according to local environmental law NBR due to lead leaching. Therefore, it is possible to analyze the difference in the linear retraction of burning of the formulations.
Hence, in the coming years, the amount of sludge produced every day tends to increase due to the implementation of new service stations. The CRTs were split into three, according to the previous delimitation Fig. Despite having proper landfills for the disposal of CRT monitors, most of them end up in improper landfills or in no landfill at all Oliveira, Best results were observed in sample F that was processed with the following parameters: Table 4 presents the results of the Raw Residue of the STD and enamel waste, showing that the residue used has a smaller particle size than the standard mass, directly aiding in the packaging factor, contributing to a better compaction.
American Public Health Association,p. The chemical analysis of the solution was performed in an atomic absorption spectrophotometer. Rio de Janeiro, b.
Rotator for non volatile substances TE – Tecnal
As reported in several international publications, waste of CRT monitors represents an environmental threat and yet it has not been classified under Brazilian law. The samples were molded into prismatic blades with dimensions of 6. Subsequently, sludge is treated under anaerobic digesters, followed by dehydration through sun exposure in drying beds for 15 days. Even though promising, there are no studies indicating any economic or environmental viability of these uses, since these byproducts have resistance loss compared to those already marketed.
Lead hazard evaluation for cathode ray tube monitors in Brazil
As stated by Okadaa material containing lead may scatter and result in oral intake of the dispersed lead by humans, which ultimately results in health problems.
The surfaces set by equations of the compound model for mixtures of soil with both sludge residues are shown in Figure 7.
Compaction tests were performed at intermediate compression pressure for soil — WTP sludge mix and under interchanged pressures for soil —STP sludge mix.
Commercial application 1005 marketing of water plant residuals. These solutions have as limiting factors groundwater and soil contamination organic fertilizer and land farmingcosts landfill and incineration and loss of mechanical strength clay pottery 100005 fine aggregate. Study for vitreous waste recovery in the formulation of heavy nbt ceramics. It is regarded as a pre-treatment, in which hazardous constituents of wastes are processed and kept in less soluble forms, being confined in capsules, particles or blocks.
Chemically, the residue showed larger amounts than those found in the literature of both aluminum and iron oxides, indicating that the use of coagulants exceeded the values of other WTPs, due to impurities present in these waters. Tantawy MA, Sa R. NBR A 5. As examples, cited can be the use of chamotte, glass, rock dust, wood ash and rice husk ash incorporated in the ceramic mass for blocks. In compliance with the TRB rating, an A soil type is regarded as good to excellent for paving uses.
The dispersion of the results may have been affected by the granular nature of the soil, which requires further care with samples during the process to avoid damages, mainly with regard to laying of the specimens into the triaxial chamber. Nbd the waste treatment and disposal, FONSECA points out that it is essential to reuse them instead of simply storing it temporarily due to economic, environmental and area availability causes.
Therefore, recycling or re-use within the same process can be a reasonable way of preserving the environment. Thus, we can assert that abnf amount of aluminum-sulfate based coagulant added in the water treatment we assessed was higher than xbnt other WTPs that have already surveyed in this country.
Environmental profile of ceramic tiles and their potential for improvement. The procedures presented the NBR simulate the leaching that may occur to aabnt non-sheltered waste; a flowchart of the norm is presented in Fig. Mechanical testing Compression tests were performed through tests of California bearing ratio CBR and Resilience Modulus RM to assess potential use of the residue in base and sub-base paving.
Characteristics of fired clay bricks with waste marble powder addition as building materials. The study was to analyze the technical feasibility of the incorporation of vitreous waste, from enamel decanters, into a heavy clay mass for fired clay ceramic structural block production.
Unused solid materials form such residues during wastewater treatment process. These tailings have the potential to be used as an alternative raw material in the manufacture of heavy clay ceramics and therefore, from a manufacturing point of view, can be used as a great flux that still generates improvements in the characterization of the final product and gains in sustainable marketing.
These minerals are typical of material that has undergone treatment in WTPs. The analyzed waste is considered as class I—Dangerous due to the presence of toxic elements in the leachate above the Brazilian waste classification standard. Services on Demand Journal. Even though the leachate analysis has classified the residue as non-hazardous for being non-inert, care is essential with its storage and disposal, to avoid contamination of water resources and even the soil with heavy metals.
How to cite this article. Ten samples were pressed for each formulation in a total of 60 samples at a pressure of 5 tons. Additions from enamel waste contributed to the increase of physical properties such as burning retraction, mechanical resistance to bending, and decreased water absorption and loss of ignition.
As the waste content increases it also increased retraction, because of the waste having considerable amounts of fluxing materials as shown in Table 2which aids in the fusion of the piece, causing the retraction. Water and sewage treatment plants STP and WTP generate as byproduct a significant amount of sludge with environment harmful elements.
Rotator for non volatile substances TE-743
Edmond, OK Tel: Figure 2 Linear thermal retraction of the formulations studied. Because of the large volume of sludge produced, residue destination planning should consist of a program to guide final disposal taking into account technical, environmental and economic points of view.
Characterisation of fired—clay bricks incorporating biosolids and abng effect of heating rate on properties of bricks. No part of this content may be reproduced or transmitted in any form or by any means as per the standard guidelines of fair use.
The presence of silica SiO2 in main content is an indicator that the residue can improve the quality of the piece, mainly in the mechanical strength, since it is an oxide flux related to the verification of the material.
Such a tool considers industrial wastes as by-products or alternative materials that can feed another industry. Therefore, innovative approaches to the production of heavy clay ceramics that are less dependent on virgin sources are highly encouraged from the perspective of protecting natural resources and sustainable development.