Bioremediation Approaches for Degradation …
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Steps involved in the electro flotation are
1. Generation of gas bubble
2. Interaction between pollutants and gas bubble
3. Adsorption of the gas bubble on the pollutants surface
4. Rising of gas bubble along with pollutants to the surface of water.
Factors affecting the flotation rate are
1. Solution surface tension
2. Diameter of gas bubble
3. Pollutant particle size
4. Residence time of water in the electrolytic cell
5. Zeta potential of gas bubble
6. Temperature
7. pH
8. Concentration of the pollutant (Arulmurugan et al. 2007; Ukiwe et al. 2014;
Abbas and Ali 2018; Butler et al. 2011; Naje et al. 2015).
2.9.2 Disadvantages
All the above methods have its own limitations, but high cost and low efficiency
when more number of dyes is present in the waste water stream, also not environmentally safe. Further generations of toxic and secondary waste products are the
quite aggravating of these methods which needs to be tackled further.
3 Biological Methods
Recently, treating due effluent by biological methods has been received much consideration due to its cost, easy process, simplicity and can used to remove different categories of dye effluents. In biological methods, microorganisms like fungi, bacteria,
yeast, actinobacteria, algae and plants are used. Among the different biological
sources, plants (Phytoremediation) has been considered to be more potential and
economical when compared to all other methods.
3.1 Phytoremediation
Phytoremediation—Utilization of live plants to remove the pollutants from the environments. The term Phytoremediation is derived from Greek Phyto, plant and Latin
remedium, cure. This phytoremediation method is an emerging technology, gaining
much interest among the researchers due to its promising results with inexpensive. It
is the in situ and eco-friendly method to remove different hazardous waste pollutants
125
Steps involved in the electro flotation are
1. Generation of gas bubble
2. Interaction between pollutants and gas bubble
3. Adsorption of the gas bubble on the pollutants surface
4. Rising of gas bubble along with pollutants to the surface of water.
Factors affecting the flotation rate are
1. Solution surface tension
2. Diameter of gas bubble
3. Pollutant particle size
4. Residence time of water in the electrolytic cell
5. Zeta potential of gas bubble
6. Temperature
7. pH
8. Concentration of the pollutant (Arulmurugan et al. 2007; Ukiwe et al. 2014;
Abbas and Ali 2018; Butler et al. 2011; Naje et al. 2015).
2.9.2 Disadvantages
All the above methods have its own limitations, but high cost and low efficiency
when more number of dyes is present in the waste water stream, also not environmentally safe. Further generations of toxic and secondary waste products are the
quite aggravating of these methods which needs to be tackled further.
3 Biological Methods
Recently, treating due effluent by biological methods has been received much consideration due to its cost, easy process, simplicity and can used to remove different categories of dye effluents. In biological methods, microorganisms like fungi, bacteria,
yeast, actinobacteria, algae and plants are used. Among the different biological
sources, plants (Phytoremediation) has been considered to be more potential and
economical when compared to all other methods.
3.1 Phytoremediation
Phytoremediation—Utilization of live plants to remove the pollutants from the environments. The term Phytoremediation is derived from Greek Phyto, plant and Latin
remedium, cure. This phytoremediation method is an emerging technology, gaining
much interest among the researchers due to its promising results with inexpensive. It
is the in situ and eco-friendly method to remove different hazardous waste pollutants