GREEN AND CARBON NEGATIVE

GREEN AND CARBON NEGATIVE

  • Micro-Algae, unlike bacteria are green and photosynthetic micro-organisms. Instead of consuming oxygen, they release oxygen into the surroundings, thereby creating an oxygenated environment. In this process they absorb CO2. To generate 1 kg of algal biomass, 1.83 kgs of CO2 is absorbed.
  • In a typical effluent treatment process, for every 1000 L of effluent treated, anywhere between 200 gms to 500 gms of micro algae are generated. This implies that for a 1.5 MLD plant which is currently being setup in a textile unit in Malegaon, we will be on an average sequestering a good 960 kgs of Carbon dioxide per day. This amounts to sequestering 350 tonnes of Carbon dioxide in the entire year.

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  • The plant at Malegaon has a BOD of 1000 – 1500 ppm, which implies a BOD load of 2250 kgs per day of BOD which is removed. This is equivalent to a release of 1150 tons of CO2 per year, if a conventional Activated Sludge Process is used.
  • To put that figure into perspective, a typical eucalyptus or pine tree will take in anything between 150 – 180 kgs of CO2in an entire year. The CO2 taken in by one plant at Malegaon will be equal to planting 2000 Eucalyptus trees.
  • Sequestration of CO2 by micro-algae is very well documented globally. Several companies have used micro-algae to absorb CO2 from flue gas to mitigate their Carbon footprint. For the first time, this technology is being widely used in industries in India at a large scale. Effluent treatment and simultaneous carbon offset by micro-algae represent a win-win situation from an environmental point of view.

 

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