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Dissertations / Theses on the topic 'Tannery effluents'

Author: Grafiati
Published: 18 May 2024
Last updated: 26 July 2025

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1

Halder, Aparna. "Identification and studies on microbes found in tannery effluents." Thesis, University of North Bengal, 2006. http://ir.nbu.ac.in/handle/123456789/1396.

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2

Glaum, Deanne Melanie. "A process for the detanning of chrome leather wastes utilising tannery effluents." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1004089.

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The considerable volume of chromium-bearing wastes generated during the process of leather tanning, exacerbated by the potential for trivalent chromium in the wastes to be oxidised to the toxic hexavalent state, has created a major waste disposal dilemma for the tanning industry. While methods are available for the safe and effective treatment of residual chrome-tanning liquors, little has been done to address the issue of the chrome-bearing solid wastes. Given the increasingly stringent environmental compliance standards facing tanneries, unless an appropriate treatment process is developed i
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3

Laubscher, Richard Keith. "The culture of Dunaliella salina and the production of β-carotene in tannery effluents". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1004116.

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The problems of waste disposal in the tanning industry are unique in that the effluents are highly saline, have a high organic loading and contain heavy metals. Methods are available for the safe treatment and disposal of the latter two components, but the saline component requires the expensive outlay of evaporation ponds. This study has identified a possible use for the saline effluents, turning a problematic waste product into a potentially valuable by-product. A range of tannery effluents were identified and tested for their suitability for the mass cultivation of Dunaliella salina (bardaw
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4

Robertsson, Jonas, and Camilla Andersson. "Characterisation and removal of heavy metals in tannery effluents through the use of local materials." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-239005.

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Chromium and other heavy metals are known to cause issues related to human and environmental health when they occur in high concentrations in ecosystems. Chromium poses a particularly large threat if it occurs in its hexavalent form, Cr(VI), as it is highly reactive and carcinogenic. The aim of this project was to investigate the wastewater emitted from a tannery in Liwonde, Malawi, with respect to the metals Cr, Al, Cd, Cu, Fe, Mn, Pb and Zn, and to reduce the concentrations using locally available materials. A particular emphasis was put on chromium.   Wastewater collected from the tannery w
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5

Zongo, Inoussa. "Étude expérimentale et théorique du procédé d'électrocoagulation : application au traitement de deux effluents textiles et d'un effluent simulé de tannerie." Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL066N/document.

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L’électrocoagulation est une technique de traitement des eaux usées basée sur la dissolution d’anode sacrificielle de fer ou d’aluminium. Ces métaux se dissolvent sous formes de cations Fe2+ puis Fe3+ et Al3+ qui vont former des hydroxydes de métal qui entraînent par adsorption les impuretés de l’effluent en diminuant le potentiel Zêta de ces impuretés. Le réacteur électrochimique utilisé est constitué de deux électrodes métalliques (Fe ou Al) planes et parallèles qui laissent passer entre elles l’effluent à traiter. Des densités de courant de 50 à 200 A/m2 ont été appliquées pour traiter les
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6

Campos, Pena Aline C., L. F. Trierweiler, and M. Gutterres. "Influence of Photoperiod on Biomass Production and Removal of Nutrients from Tannery Effluents with Microalgae Consortium - 19." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34223.

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Content: Wastewater from tanneries besides having toxic compounds also contain nutrients such as carbon, phosphorus, and nitrogen, which facilitate the rapid multiplication of microalgae. Currently, many types of researches search microalgae capable of growing in industrial effluents, exploiting the advantages of removing the nutrients present in these waters and producing biomass with high value- added. The liquid effluents produced in tanneries for finished leather have essential nutrients for the growth of microalgae, but also some compounds that may restrict or hinder the growth of microal
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7

Rajamani, Sengoda. "Sustainable Tannery Effluent Treatment System with TDS Management - 58." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34334.

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Content: Sustainable tannery effluent treatment system in achieving required discharge standards including Total Dissolved Solids (TDS) is one of the major challenges faced by the World Leather Industry. Conventional treatment system reduces Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solids (SS), heavy metals etc. and not the TDS and salinity. To achieve the TDS level, the tanneries in South India were forced to adopt Zero Liquid Discharge (ZLD) system by incorporating Reverse Osmosis (RO) system and Multiple Effect Evaporator (MEE). Though recovery of water is be
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8

Song, Zhi. "Investigation of the treatment of mixed tannery wastewater." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341800.

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9

Barakat, Sabine. "Chromium distribution and speciation in water and sediments affected by tannery effluent in Veneto (Italy)." Thesis, University of the West of England, Bristol, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407285.

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10

Hurlaborde, Jean-Jacques d'. "Conditions nécessaires à la nitrification des effluents de tannerie en fosse d'oxydation." Lyon 1, 1987. http://www.theses.fr/1987LYO11734.

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Nitrification realisable simultanement a l'epuration carbonee par le procede des boues activees. Une etude sur pilote a permis, en s'appuyant sur les caracteristiques de cette microflore nitrifiante, de degager des consignes de gestion et de dimensionnement pour que la nitrification soit possible
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11

D'Hurlaborde, Jean-Jacques. "Conditions nécessaires à la nitrification des effluents de tannerie en fosse d'oxydation." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37606000t.

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12

Pena, Aline de Cássia Campos. "Tratamento de efluentes de curtume com consórcio de microalgas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/173838.

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Os efluentes líquidos de curtumes apresentam altas cargas orgânicas e de poluentes que devem ser tratados corretamente para atingir os padrões legais para seu descarte, evitando a eutrofização de corpos hídricos e poluição das águas. O acabamento do couro é o estágio final da produção, onde o couro recebe as características desejadas de acordo com os produtos e artigos que serão produzidos. Os efluentes das etapas de processamento para acabamento do couro são responsáveis por conterem poluentes químicos devido ao uso de corantes, surfactantes, metais tóxicos, agentes emulsificantes, recurtente
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13

Lima, Eveline Cunha. "RemoÃÃo de Sulfato em Efluentes de Curtume usando Processo BiolÃgico." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7223.

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FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ<br>A dissertaÃÃo teve como objetivo analisar a estabilidade e eficiÃncia do processo anaerÃbio de reduÃÃo de sulfato aplicado ao tratamento de efluente de um curtume. Utilizaram-se dois reatores anaerÃbios de manta de lodo e fluxo ascendente (UASB-Upflow Anaerobic Sludge Blanket), com capacidade de 3,0 litros, temperatura constante de 29+2ÂC e tempo de detenÃÃo hidrÃulica de 12 e 24 horas. Os reatores operaram com afluente sintÃtico e em seguida com afluente real. Inicialmente, com afluente sintÃtico, foram estudadas as relaÃÃes de DQO/SO4-2 de
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14

Flores, Rubia Gomes. "APLICAÇÃO DE PROCESSOS OXIDATIVOS AVANÇADOS HOMOGÊNEOS E HETEROGÊNEOS NA DEGRADAÇÃO DE EFLUENTES DE CURTUME." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/7701.

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This study investigated the application of advanced oxidative processes for the homogeneous and heterogeneous degradation of a tanning effluent. The catalytic activity of a solid oxide containing manganese was evaluated in the heterogeneous systems. The experiments were performed in a photocatalytic batch reactor in laboratory scale. The solid used was the commercial product Birm®, consisting mainly of crystalline silica, silicate, aluminum and manganese dioxide. The adsorption results using Birm® in synthetic sewage adjusted to the models of Langmuir and Freundlich and established that the ad
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15

Borba, Fernando Henrique. "Aplicação dos processos foto-Fenton e eletrofloculação no tratamento de efluente de curtume." Universidade Estadual do Oeste do Parana, 2010. http://tede.unioeste.br:8080/tede/handle/tede/1887.

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Made available in DSpace on 2017-07-10T18:08:12Z (GMT). No. of bitstreams: 1 Fernando Henrique Borba.pdf: 3301834 bytes, checksum: 0c5216d667957cc99d5acd2dd5d59c05 (MD5) Previous issue date: 2010-02-18<br>Pollution is a currently environmental problem of world concern. There are many events such as the discharging of untreated effluents in watercourses that cause the eutrophization of water bodies and bad water quality, as well as an inefficiency or lack of a current environmental law. The main goal of this dissertation was the application of solar and artificial-based photo-Fenton processes
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16

Caliari, Paulo Cezar. "Electrochemical treatment of tannery effluents." Doctoral thesis, 2017. http://hdl.handle.net/10400.6/4450.

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Tannery wastewater is highly complex and contains high concentrations of organics and other toxic chemicals, such as sulfide and chromium, which inhibit the activity of microorganisms during biological oxidations and are not removed completely from wastewater. Since the biological processes are not able to fully depollute tannery effluents, other technologies, such as electrochemical oxidation processes, are being studied for the treatment of aqueous wastewaters. In this work, the study of the electrochemical oxidation of samples from tannery wastewater, clarified or not, was carried ou
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