Reactor design for hazardous waste treatment using a white rot fungus

Lewandowski, G. A.; Armenante, Piero M.; Pak, Daewon

doi:10.1016/0043-1354(90)90067-g

Cited by 52 publications

(24 citation statements)

References 22 publications

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“…100 cm 3 of sterile media in 500 cm 3 Erylenmeyer¯asks were inoculated with a loop full of spores drawn from a fresh slant of P. chrysosporium and incubated at 30 C, in stationary condition. Samples were drawn at different time intervals, centrifuged to separate the cells and the supernatant was analysed for enzyme activity.…”

Section: Enzyme Productionmentioning

confidence: 99%

“…2 kg/m 3 of glucose supplemented with pine or cellulose on the third day was used to obtain good yeild (140 U) of lignin peroxidase activity [2]. 2-Chlorophenol biodegradation in batch and packed bed reactors with 10 kg/m 3 of glucose have also been used [3]. The time course lignin peroxidase production under nitrogen limiting, suf®cient, and excess condition was studied.…”

Section: Introductionmentioning

confidence: 99%

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Optimisation of lignin peroxidase production from Phanerochaete chrysosporium using response surface methodology

Manimekalai

Swaminathan

1999

Bioprocess Engineering

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The ligninolytic white rot fungus Phanerochaete chrysosporium, holds good promise as a biological treatment tool due to its ability to produce the lignin peroxidase enzyme which has the potential to degrade a wide variety of hazardous compounds. The effective application of this technique requires optimisation of the process variables to maximise the enzyme production. Response surface methodology was applied to determine the effects of glucose, ammonium tartarate and ferrous sulphate and their mutual interactions on lignin peroxidase production. With a view to simultaneously reducing the number of experiments and obtaining more information on the mutual interactions between the variables, a 2 3 full-factorial central composite experimental design was adopted. The experimental data were ®tted to a second order polynomial equation using multiple regression analysis and also analysed by appropriate statistical methods. Solving the regression equation using the multi-stage monte-carlo optimisation techniques, the optimum process conditions for enhanced production of lignin peroxidase were obtained as: glucose 0.9728 kg/m 3 , ammonium tartarate 0.288 kg/m 3 , and ferrous sulphate 0.097 kg/m 3 .

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Section: Enzyme Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimisation of lignin peroxidase production from Phanerochaete chrysosporium using response surface methodology

Manimekalai

Swaminathan

1999

Bioprocess Engineering

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“…Uma alternativa que tem-se mostrado muito interessante, motivo pelo qual está sendo submetida a intensa avaliação, é a utilização de biorreatores operados com fungos. Sistemas que operam com fungos imobilizados em diversos suportes têm sido utilizados com grande sucesso na degradação de clorofenóis [45][46][47][48][49][50] . Recentes publicações têm reportado alta eficiência de algumas enzimas no tratamento de efluentes (ex.…”

Section: Métodos Biológicos Para Remediação De Efluentes Derivados Daunclassified

Remediação de efluentes derivados da indústria de papel e celulose: tratamento biológico e fotocatalítico

1997

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Recebido em 24/4/96; aceito em 16/8/96 REMEDIATION OF EFFLUENTS FROM PAPER AND CELLULOSE INDUSTRY. BIOLOGICAL AND PHOTOCATALYTIC TREATMENT. The contribution of the industrial activities to the environmental contamination phenomena is evident. Great efforts are dedicated to the establishment of methodologies which permits an adequate treatment of the produced effluents, as a manner of minimizing the environmental impact of these wastes. The methodologies based on photocatalytic processes are very promise alternatives, because permits degradation of a great number of chemical substances of high toxic potential, without the use of other chemicals. The present work is an overview about the principal environmental aspects related with the paper and cellulose industry and the main alternatives employed for the reduction of environmental impact produced for its residues. The principal results of the photocatalytic treatment of this kind of effluents using metallic semiconductors is also showed.Keywords: paper and cellulose effluents; biological and photocatalytic treatment; metallic semiconductors. REVISÃO INTRODUÇÃOO desmedido crescimento populacional dos nossos dias, junto com a popularização do modelo consumista gerado nos países do chamado "primeiro mundo", tem propiciado a explosão industrial que caracteriza as últimas décadas. Esta atividade industrial é responsável pela produção de inúmeros produtos de primeira necessidade, razão pela qual tem-se transformado em verdadeiro símbolo das sociedades desenvolvidas. Além de proporcionar alimentos, materiais e serviços, a atividade industrial costuma ser responsabilizada, muitas vezes com justa razão, pelo fenômeno de contaminação ambiental, tema que deixou de ser preocupação exclusiva de cientistas e visionários e transformou-se em clamor geral de uma sociedade que testemunha a deterioração progressiva do planeta.Embora exista uma preocupação universal por evitar episódi-os de contaminação ambiental, estes eventos continuam acontecendo, principalmente por que grande parte dos processos produtivos são intrinsecamente poluentes. Muitos estudos, objetivando desenvolver tecnologia capaz de minimizar o volume e a toxicidade dos efluentes industriais, têm sido realizados. Atualmente, por exemplo, existe uma forte tendência nas indústrias de papel e celulose pelo estabelecimento de tecnologias limpas, as quais poderiam permitir, em princípio, atingir o estado de descarga zero [1][2][3][4][5][6] . Infelizmente, a aplicabilidade deste tipo de sistemas está subordinada ao desenvolvimento de processos modificados e ao estabelecimento de sistemas de reciclagem de efluentes, atividades que implicam tecnologias não universalmente disponíveis. Por este motivo, o estudo de novas alternativas para o tratamento e a remediação dos inúmeros efluentes industriais atualmente produzidos, continua sendo uma das principais armas de combate contra a contaminação antropogênica.Com este propósito, muitas técnicas têm sido desenvolvidas. Alguns procedimentos clássicos como incineração e procedime...

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“…Previous investigators have reported certain strains to be capable of degrading lignin (Hackett et al, 1977 andKirk et al, 1978), polymeric dyes (Glenn and Gold, 1983), aromatic hydrocarbons (Bumpus, 1989), 2-chlorophenol (Lewandowski et al, 1990) and pesticides (Bumpus and Aust, 1987).…”

Section: Introductionmentioning

confidence: 96%

The use of image analysis for spore counts of white-rot fungi

1992

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SUMMARYAn improved method has been developed for the determination of fungal spore counts using a haemocytometer. The method uses a personal computer with a frame grabber card and commercial imaging software. Semi-automation using an iterative programming technique was implemented to count the spores produced by Phanerochaete chrysosporium. Rapid and reliable counts were achieved using image processing.

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Reactor design for hazardous waste treatment using a white rot fungus

Cited by 52 publications

References 22 publications

Optimisation of lignin peroxidase production from Phanerochaete chrysosporium using response surface methodology

Optimisation of lignin peroxidase production from Phanerochaete chrysosporium using response surface methodology

Remediação de efluentes derivados da indústria de papel e celulose: tratamento biológico e fotocatalítico

The use of image analysis for spore counts of white-rot fungi

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