Toxicological evaluation of bacterial decolourised anaerobically treated distillery effluent with common duckweed (Lemna minor).
J Environ Biol
;
2004 Jan; 25(1): 93-8
Artigo
em Inglês
| 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.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Pigmentos Biológicos
/
Plantas
/
Fatores de Tempo
/
Bactérias
/
Poluentes da Água
/
Biodegradação Ambiental
/
Bioensaio
/
Microbiologia Industrial
/
Clorofila
/
Testes de Toxicidade
Idioma:
Inglês
Revista:
J Environ Biol
Ano de publicação:
2004
Tipo de documento:
Artigo
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