3.6.2. Phytotoxicity studies
Seed germination and plant growth bioassays are the most
common techniques used to evaluate the phytotoxicity (Patil et al.,
2008). The untreated textile effluent released to the environment
may be hazardous, when used directly for the agriculture purpose.
Hence it is of prime intention to study the phytotoxic effect of
treated as well as untreated effluent. Seed germination was found
to be completely inhibited for both T. aestivum and P. mungo when
exposed to untreated effluent (Table 7). Germination percentage of
seeds of T. aestivum and P. mungo in treated effluent and plain
distilled water were compared. It was found that, there is slight
inhibition in case of the seeds exposed to treated effluent, indicating
somewhat toxic nature of it, ultimately affecting the length
of plumule and radical. Although treated effluent seems to be toxic
compared to control (distilled water), it was found to be much less
toxic than untreated effluent. Phytotoxicity studies revealed the
exertion of toxic effect of treated and untreated effluent on T. aestivum
and P. mungo seeds.
4. Conclusions
It was observed that the waste yeast cells from distillery
industry have the significant potential to remediate the textile
effluent. Reduction in the color, heavy metals, COD and BOD was
achieved by both; yeast cells from waste (YB) and standard yeast
strain S. cerevisiae MTCC 463 (SC). Induction of reductive enzymes
like DCIP reductase and azo reductase indicates the involvement of
theses enzymes in the decolorization process. Utilization of inexpensive
supportive material like POP for immobilization and
development of continuous effluent treatment plant, will be an
economical tool for the textile industry in near by future. Cytotoxic
and genotoxic studies in combination with classical Allium test
gives clear idea regarding the less toxic nature of the treated
effluent. As the present study deals with the utilization of waste of
one (distillery) industry to remediate the waste from another
(textile) industry, it proves to be efficient methodology for the
waste management from both the industries.
3.6.2. Phytotoxicity studiesSeed germination and plant growth bioassays are the mostcommon techniques used to evaluate the phytotoxicity (Patil et al.,2008). The untreated textile effluent released to the environmentmay be hazardous, when used directly for the agriculture purpose.Hence it is of prime intention to study the phytotoxic effect oftreated as well as untreated effluent. Seed germination was foundto be completely inhibited for both T. aestivum and P. mungo whenexposed to untreated effluent (Table 7). Germination percentage ofseeds of T. aestivum and P. mungo in treated effluent and plaindistilled water were compared. It was found that, there is slightinhibition in case of the seeds exposed to treated effluent, indicatingsomewhat toxic nature of it, ultimately affecting the lengthof plumule and radical. Although treated effluent seems to be toxiccompared to control (distilled water), it was found to be much lesstoxic than untreated effluent. Phytotoxicity studies revealed theexertion of toxic effect of treated and untreated effluent on T. aestivumand P. mungo seeds.4. ConclusionsIt was observed that the waste yeast cells from distilleryindustry have the significant potential to remediate the textileeffluent. Reduction in the color, heavy metals, COD and BOD wasachieved by both; yeast cells from waste (YB) and standard yeaststrain S. cerevisiae MTCC 463 (SC). Induction of reductive enzymeslike DCIP reductase and azo reductase indicates the involvement of
theses enzymes in the decolorization process. Utilization of inexpensive
supportive material like POP for immobilization and
development of continuous effluent treatment plant, will be an
economical tool for the textile industry in near by future. Cytotoxic
and genotoxic studies in combination with classical Allium test
gives clear idea regarding the less toxic nature of the treated
effluent. As the present study deals with the utilization of waste of
one (distillery) industry to remediate the waste from another
(textile) industry, it proves to be efficient methodology for the
waste management from both the industries.
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