Bioremediation : A novel approach to waste to waste treatment in surface coatings industry / R. J. Patil in PAINTINDIA, Vol. XLVII, N° 6 (06/1997)

[article]  inPAINTINDIA > Vol. XLVII, N° 6 (06/1997) . - p. 41-52 Titre : Bioremediation : A novel approach to waste to waste treatment in surface coatings industry Type de document : texte imprimé Auteurs : R. J. Patil, Auteur ; P. K. Kamath, Auteur Année de publication : 1997 Article en page(s) : p. 41-52 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Industrie  peinture  vernis'  'Eau  usée  industrielle'  'Epuration  eau  usée'  biologique'  Biofiltre Index. décimale : 667.9 Revêtements et enduits Résumé : In recent times, bioremediation - a biological treatment process for industrial wastes has emerged as a preferred technology in the chemical industry, which has not been exploited to the extent required, by the surface coating industry. This paper attempts to explore bioremediation as a process to degrade wet paint sludge and for the clean up of hazardous solvent residues in liquid as well as gaseous forms. Towards meeting these objectives, five microbial cultures have been isolated by the enrichment and adaptation culture technique from the spray booth environs as well as from the composite soil sample collected from the environs of Rashtriya Chemicals and Fertilizers Plant, located in the near vicinity of Hindustan Petroleum Refinery in Mumbai. The genera of all the five cultures have been identified biochemically, of which, one is an yeast culture and the rest is bacteria. During enrichment, individual hydrocarbon solvents such as benzene/ethyl acetate/mineral turpentine/chloroform/ methyl iso butyl ketone/toluene/butyl cellosolve/triethylamine/xylene/methanol and petrol are used as carbon and energy sources employing Kazuyoshi et al, simple mineral salts medium to support microbial activity. As the clean up of complex sites require a host of microbial flora with metabolic and physiological diversity, the microflora from the booth water was bioaugmented with isolates from the RCF source. The proportion of the culture mix in the consortia played a significant role resulting in enhanced uptake of organic residues, thereby shortening the period of incubation. About 95-99% reduction in COD values were achieved with concomitant reduction in the levels of solvent odours from booth water. Wet paint sludge digestion by the consortia, though, was considerably slow. Significant degradative changes in polyester portion of the binder has been observed as compared to amino resin. Further experimentation on exposure of individual cultures to a host of solvents in vapour/gaseous form has yielded interesting results. Note de contenu : - WASTE DISPOSAL - SOLVENT EMISSIONS - WHAT IS BIOREMEDIATION AND HOW DOES A BIOFILTER WORK ? - BIOFILTER - SCOPE OF THE PRESENT WORK - SCOUTING FOR MICROORGANISMS - Enrichment and adaptation - Isolation - Selection of cultures for consortia - Identification/characterisation - MAINTENANCE OF CULTURES - PREPARATION OF ARTIFICIAL (TAILOR MADE) BOOTH WATER - ANALYSIS OF SOLVENTS - INFRARED SPECTROSCOPY - CULTURE RESPONSE TO SOLVENT VAPOURS - Single solvent-multiple cultures response - CHEMICAL OXYGEN DEMAND (COD) - SLUDGE DIGESTION Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13286 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
006464	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Biosynthesis of a UV stable pigment : prodigiosin / V. Natarajan in PAINTINDIA, Vol. XLV, N° 10 (10/1995)

[article]  inPAINTINDIA > Vol. XLV, N° 10 (10/1995) . - p. 23-33 Titre : Biosynthesis of a UV stable pigment : prodigiosin Type de document : texte imprimé Auteurs : V. Natarajan, Auteur ; P. K. Kamath, Auteur Année de publication : 1995 Article en page(s) : p. 23-33 Note générale : Glossaire - Bibliogr. Langues : Anglais (eng) Tags : Biosynthèse  Pigment  Prodigiosine  'Serratia  marcescens'  'Culture  de  microorganismes'  Mutagenèse  Optimisation  'Zinc  II  Ion'  Mutation  'Cobalt  'Milieu  culture'  'Nickel  'Elément  trace'  'Fer  Nutriment  'Titane  'Irradiation  UV'  'Molybdène  Enterobacteriaceae  Bactérie Index. décimale : 667.9 Revêtements et enduits Résumé : Pigment Prodigiosin is red maroon in colour and has a pyrrye dipyrryl methene structure. It is water insoluble and occurs membrane bound in the cells of Serratia marcescens, which is gram negative bacterium. As the parent strain of Serratia marcescens NRRL B284 was found to be unstable in its pigment synthesising ability, an attempt was therefore made to derive UV stable mutants employing UV induced mutagenesis. Out of seven mutants derived, a lone mutant designed M2 was found to be most promising both in terms of stable pigment producing characters as well as faster growth rates in select synthetic medium compared to the rest of the mutants. Studies on mutant M2 constitue optimisation of Carbon:Nitrogen ratio in the synthetic medium selected, followed by studies on feeding salts of trace cations during cell cultivation (as nutrient modifiers) to explore further (if any), scope for improving the UV stability of the pigment synthesised. The role/contribution towards UV stability by trace cations e.g. Mo++, Ti++, Fe++, Ni++, Co++ and Zn++ were investigated. Select UV stable pigments were evaluated for their performance in two types of air drying paints, with intersting results with respect to colour and gloss retention Note de contenu : HISTORY OF PROIDOGIOSIN - SCOPE OF CURRENT WORK - MATERIAL AND METHODS - EXPERIMENTAL : Culture maintenance and inoculum preparation - Screening of media for pigment production - Optimisation of carbone : nitrogen ratio for pigment synthesis - Cell harvesting, determination of biomass, pigment extraction - Chromatographic analysis of pigment - Reversion to chromogenic variants - Role of oxygen - Straint improvement through UV mutagenesis - Screening of salts of trace cations as nutrient modifiers - Pigment screening for uv stability - Prodigiosin for paint application - RESULTS AND DISCUSSION : Reversion to chromogenic variants - UV induced mutagenesis and effect of mutation - Effect of oxyten - Effect of optimising carbon : nitrogen in synthetic medium for mutant M2 - Composition of MSM - Effect of trace cations on UV stability of pigment - Performance of prodigiosin in paints - IR interpretation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13665 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
006457	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)