Toxicological evaluation of bacterial decolourised anaerobically treated distillery effluent with common duckweed (Lemna minor).
J Environ Biol
;
2004 Jan; 25(1): 93-8
Article
Dans Anglais
| IMSEAR
| ID: sea-113737
ABSTRACT
Duckweed (Lemna minor) a small vascular plant, grows rapidly, is sensitive to a wide variety of toxicants and is easy to culture. A method is described that measures duckweed frond growth, chlorophyll, protein and biomass content as indicator of growth inhibition. The physico-chemical analysis of anaerobically treated distillery effluent revealed high BOD (28,000 mg/l), COD (52,400 mg/l) and dark brown colour (180,000 Co. Pt.). This effluent showed high toxicity to Lemna minor after 96 h of exposure in laboratory condition. EC50 of the fronds for chlorophyll, protein and biomass was found to be 25%, however, the bacterial decolourised effluent showed reduction of BOD (87.50%), COD (84.50%) and colour (76%). Further the toxicity evaluation with Lemna minor showed toxicity reduction up to 63% for all tested parameters. The EC50 noted for chlorophyll, protein and biomass was 100% concentration of decolourised effluent.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Pigments biologiques
/
Plantes
/
Facteurs temps
/
Bactéries
/
Polluants de l'eau
/
Dépollution biologique de l'environnement
/
Dosage biologique
/
Microbiologie industrielle
/
Chlorophylle
/
Tests de toxicité
langue:
Anglais
Texte intégral:
J Environ Biol
Année:
2004
Type:
Article
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