Decolorization of pulp and paper mill effluent by growth ofAspergillus niger.

Pulp and paper mill effluent was decolorized by growth ofAspergillus niger. Adding glucose (2.0 g/l) and NH4H2PO4 (1.0 g/l) improved decolorization by the fungus (leaving 19% of original colour) and reduced the BOD5 (43%) and the COD (41%) of the effluent after 48 h of incubation.

Isolation and characterization of a methanol-utilizing strain ofCandida boidinii from cow dung which is able to grow on paraffin.

A methanol-utilizing yeast,Candida boidinii, was isolated from cow dung. It could grow on a medium containing methanol or liquid paraffin as the only carbon source. Its cell yield after 7 days of growth on methanol was 0.34 g g(-1) and on paraffin 0.30 g g(-1). The organism was able to tolerate up to 4% (v/v) methanol.

A correlation between the dissipation of insecticides and rhizosphere microflora of Abelmoschus esculentus (L.) Moench.

A study to understand the relationship between the dissipation of aldicarb and disulfoton in the rhizosphere region of bhendi and the microbial population revealed a negative correlation between the fungal and Azotobacter population and the residues of both insecticides. However, no definite correlation could be recorded between the populations of bacteria and actinomycetes and the residues of the insecticides.