Harvesting of microalgae biomass
- 1. SUBJECT : MICROALGAL TECHNOLOGY P.DIVYA, 1’ST M.SC MICROBIOLOGY, DEPARTMENT OF MICROBIOLOGY, VIVEKANANDHA ARTS AND SCIENCE COLLEGE FOR WOMEN SANKARI,SALEM.
- 2. INTRODUCTION Microalgae are microscopic algae that can be found in various aquatic environments. They are known for their high photosynthetic efficiency and ability to produce valuable compounds. This presentation explores the harvesting techniques used to unlock the potential of microalgae for various application.
- 3. IMPORTANCE OF MICROALGAE Microalgae play a crucial role in ecosystem balance and are a promising source of biofuels, nutraceuticals, and bioplastics. Their high growth rate and biomass productivity make them ideal candidates for sustainable production. Efficient harvesting techniques are essential to maximize the utilization of microalgae resources.
- 4. CONVENTIONAL HARVESTING METHODS Conventional methods for microalgae harvesting include sedimentation, centrifugation, and filtration. Sedimentation relies on the settling velocity of microalgae, while centrifugation utilizes centrifugal force to separate the cells. Filtration involves passing the culture through different types of filters to capture the microalgae biomass.
- 5. EMERGING HARVESTING TECHNOLOGIES New technologies are being developed to improve microalgae harvesting efficiency. Flocculation techniques use chemicals or natural flocculants to aggregate microalgae cells, enabling easier separation. Electro-coagulation applies electric currents to induce coagulation and precipitation of microalgae. Microfiltration and ultrafiltration offer more precise separation based on size and provide higher purity of harvested.
- 6. HARVESTING CHALLENGES Despite advancements, microalgae harvesting still faces challenges. Factors like cell size variability, cell fragility, and energy consumption pose obstacles to efficient separation. Additionally, cost-effective scalability of harvesting techniques remains a concern for large-scale microalgae production.
- 8. APPLICATIONS OF HARVESTED MICROALGAE Harvested microalgae can be utilized in various industries. They can serve as a sustainable source of biofuels, animal feed, food supplements, and cosmetic ingredients. The rich nutritional profile and bioactive compounds present in microalgae make them valuable resources for improving human and environmental health.
- 9. CONCLUSION Microalgae harvesting techniques are crucial for unlocking the potential of these microscopic organisms. Conventional methods and emerging technologies offer solutions for efficient separation, enabling the utilization of microalgae in various industries. Overcoming challenges and investing in future advancements will pave the way for a sustainable and valuable microalgae-based economy.