Biological Treatment of Tannery Wastewater - A Review

Durai, G.; Rajasimman, M.

doi:10.3923/jest.2011.1.17

Cited by 242 publications

(110 citation statements)

References 17 publications

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“…The SBR system operated according to anoxic-aerobic-anoxic principles. Predenitrification was the most efficient strategy for simultaneous removal of nitrogen and organic matter from tannery wastewater [2,26]. Additional anoxic phase was included to improve nitrogen removal; no external carbon source was needed.…”

Section: Resultsmentioning

confidence: 99%

“…Wastewater generated in tannery industry is one of the most polluting effluents due to the presence of large amounts of heavy metals (chromium), chloride, ammonia, and organic substances [1,2]. Conventional wastewater treatments have been used to treat tannery effluents, based on physicochemical treatments; however, these strategies cause an important increase in the cost of the treatment [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Pire-Sierra

Cegarra-Badell

Carrasquero

et al. 2016

Rev. Fac. Ing. Univ. Antioquia

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Pire-Sierra

Cegarra-Badell

Carrasquero

et al. 2016

Rev. Fac. Ing. Univ. Antioquia

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“…6 Águas residuais industriais contaminadas por compostos orgânicos são tratadas, comumente, através de sistemas biológicos, amplamente utilizados para o tratamento de efluentes líquidos lançados nos sistemas fluviais e marinhos. 7 O tratamento biológico possui, entretanto, algumas desvantagens, dentre as quais se destacam a grande área ocupada pelos sistemas convencionais de tratamento biológico (várias lagoas aeróbias, anaeróbias e facultativas), a exalação de odores desagradáveis e sua total inutilidade na presença de resíduos que contenham substâncias nocivas aos microorganismos (pouco biodegradáveis ou não biodegradáveis). 8 As desvantagens apresentadas justificam a investigação de novos métodos.…”

Section: Introductionunclassified

Processo De Eletrocoagulação-Flotação: Investigação Dos Parâmetros Operacionais Para O Tratamento De Águas Residuais Da Indústria De Pescados

João¹,

Emerick²,

Filho³

et al. 2017

Quim. Nova

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The objective of this study was the utilization of an electrocoagulation-flotation process to evaluate the treatment of a real wastewater from fish industries (Brazil -SC). This type of effluent is usually treated by conventional processes, which are often not sufficient to meet the desired final quality of legal environmental requirements. The effect of current density, pH and treatment time was evaluated. The best experimental conditions for the process were current of 5 A, potential of 15 V and distance between electrodes equal to 10 mm. Under these conditions, the removal of the contaminants were expressive for all analyzed parameters as follows: average color reduction of 95.5%; turbidity of 96.9%; COD 93.3; BOD5 of 97.5%; phosphorus of 88.5% and oils and greases of 93.6%.Keywords: electrochemical process; electrocoagulation; wastewater; fish industry. INTRODUÇÃOO fornecimento de água limpa à população constitui um dos grandes desafios contemporâneos. O abastecimento de água potável é crítico, especialmente nos países subdesenvolvidos.1 Rios, canais e outros corpos de água são constantemente poluídos devido à descarga indiscriminada de águas residuais (efluentes líquidos).2 Países altamente desenvolvidos, como os EUA, também se defrontam com problemas relacionados ao abastecimento de água, o que por sua vez instiga o reaproveitamento de águas residuais.3 Dessa forma, cria-se uma demanda por metodologias mais eficazes e baratas para o tratamento de águas residuais diante das tecnologias tradicionais existentes. 4 Contudo, muitas vezes as propriedades ou características das águas residuais industriais variam largamente de uma indústria para outra, e também na mesma indústria, dependendo de fatores como a variabilidade da matéria-prima.5 Para a maioria das indústrias de beneficiamento, as operações produzem águas residuais que contêm contaminantes orgânicos e inorgânicos solúveis, partículas coloidais e sólidos suspensos. Dependendo do tipo de operação, o grau de contaminação pode variar largamente entre baixo, médio ou alto. 6 Águas residuais industriais contaminadas por compostos orgânicos são tratadas, comumente, através de sistemas biológicos, amplamente utilizados para o tratamento de efluentes líquidos lançados nos sistemas fluviais e marinhos.7 O tratamento biológico possui, entretanto, algumas desvantagens, dentre as quais se destacam a grande área ocupada pelos sistemas convencionais de tratamento biológico (várias lagoas aeróbias, anaeróbias e facultativas), a exalação de odores desagradáveis e sua total inutilidade na presença de resíduos que contenham substâncias nocivas aos microorganismos (pouco biodegradáveis ou não biodegradáveis). 8 As desvantagens apresentadas justificam a investigação de novos métodos.A indústria de beneficiamento de pescados representa um exemplo de geração de águas residuais contaminadas por compostos orgânicos. Esse setor é associado à produção de grandes volumes de efluentes, que apresentam alta carga de matéria orgânica, elevada turbidez, forte coloração amarelada e odo...

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“…Then the raw materials are tanned. Two methods are adopted for tanning of raw hide, vegetable tanning and chrome tanning (Durai et al 2011). …”

Section: Introductionmentioning

confidence: 99%

Alternative Treatment Strategy for Different Streams of Tannery Wastewater

Przywara

2017

J. Ecol. Eng.

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This article discusses the results of laboratory tests aimed to determine the effectiveness of tannery wastewater treatment in the process of enhanced oxidation using Fenton reagent. The general sewage from the tannery located in Mazowieckie Province was used for the research. The process was carried out using two doses of iron of 0.45 g Fe 2+ /dm 3 and 0.56 g Fe 2+ /dm 3 , and H 2 O 2 from 2.21 g/dm 3 to 4.08 g/dm 3 . All the tests were performed for a constant optimum pH of 3.0. Wastewater was characterized by basic physico-chemical indicators (pH, conductivity, COD, chromium, ammonium nitrogen). The efficiency of the process was determined mainly on the basis of changes in the organic pollutants identified as COD. The efficacy of the Fenton process for different doses of Fe 2+ and Fe 2+ /H 2 O 2 ratio of 1: 5, 1: 6 and 1: 7 was from 69 to 80% COD reduction in relation to raw sewage. Another aspect of the study was determining the possibility of removing sulphides from the wastewater by catalytic oxygenation with oxygen from air in the presence of manganese. In this case, the wastewater produced during leather manufacture in tanneries located in the southern part of Poland was examined. The subject of the study described in the paper was to determine the optimum manganese dose and oxidation time to simultaneously remove the sulphides and organic pollutants expressed as COD. The change in pollutant content in the wastewater over time indicates that the reduction of parameters takes place within one hour after the addition of manganese. Using the process of catalytic oxidation with 0.1 g/dm 3 to 0.6 g/dm 3 manganese and a reaction time of 1, 3, 24 h, the sulphides were removed in the range of 50 to 99% and organic compounds in 12 to 65%.

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Biological Treatment of Tannery Wastewater - A Review

Cited by 242 publications

References 17 publications

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Nitrogen and cod removal from tannery wastewater using biological and physicochemical treatments

Processo De Eletrocoagulação-Flotação: Investigação Dos Parâmetros Operacionais Para O Tratamento De Águas Residuais Da Indústria De Pescados

Alternative Treatment Strategy for Different Streams of Tannery Wastewater

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