Executive Summary : | The rapid rising of extending industrialization and urbanization is a global vulnerability which immediately requires utmost attention towards the clean water production. The release of numerous heavy metals, organic dyes, cleaning agents and radioactive reactants etc. from the industries adversely affect the ecosystem and biomagnified through the food chain. Hence, these incipient bottlenecks exhibit a critical issue that will necessitate the limits on its usage, reusability, communal wisdom and circular economy in order to develop sustainability. Therefore, addressing the dazzling confront in global water insufficiency and water pollution, the researchers are showing their keen interest to explore an innovative, feasible, economically viable, biodegradable, resilient, chemical free and energy efficient wastewater treatment technique. By considering all these aforesaid facts, oxygenic photosynthetic “green microalgae” are emerging as one of the most suitable solutions in the frontiers of wastewater treatment technology management system. Generally, microalgae are influenced by several metabolic pathways (photoautotrophic, mixotrophic, and heterotrophic) to accumulate the biomass along with other secondary metabolites. Among them, organic carbon and light mediated mixotrophic cultivation affords an additional benefit to microalgae system for boosting the biomass and synthesis of valuable co-products, over inherent photoautotrophy. Very recently, the budding interest in employing microalgae biomass for biopolymer production has paved the way to explore an innovative and feasible approach towards clean water development. Biopolymers are usually considered as one of the most fascinating larger biomolecules, owing to their certain degree of biocompatible, renewable, reusable, and biodegradable phenomenon. Apart from that, the biopolymers have a huge capacity to form the complexes with metal ions and able to blanket the surface for protecting the metals from various corrosive agents. But, the large-scale biopolymer production without hampering the cell growth is still in its nascent stage. Therefore, current project proposes a one pot multi phasic intermittent fed batch cultivation strategy by step-wise light attenuation for the simultaneous enhancement of biomass and biopolymers. This entire process will be developed by fabricating a PBR/Raceway system. The as-synthesized biopolymers will be applied for anticorrosion efficiency of mild steel under acid condition. |