Microalgae for Carbon Capture and Circular Bioeconomy

Imran Ahmad is a Postdoctoral Researcher at the Institute for Water and Wastewater Technology, Durban University of Technology, South Africa. He specializes in photobioreactor engineering, microalgal biotechnology, and sustainable wastewater treatment for carbon capture, nutrient recovery, and circular bioeconomy. He has authored and edited scholarly books and publications with leading international publishers while advancing scalable environmental technologies through research innovation. Ihana Aguiar Severo is a Microalgae Cultivation Engineer at AstaReal, Inc. with active research collaborations at Florida State University and the Federal University of Paraná. She has authored over 100 scientific contributions and co-invented six patents, including one granted patent. Sameh Samir Ali is Distinguished Professor at Tanta University, Egypt, and Full Professor at the Biofuels Institute, Jiangsu University, China. His research focuses on biological conversion of recalcitrant organic wastes into biofuels and integrating bioremediation with biorefinery technologies.

• List of Contributors xxiiiForeword xxxiPreface xxxiiiAcknowledgments xxxvii1 Microalgae for Carbon Sequestration: An Introduction to Concepts and Applications 1Muhammad Shahid, Abdul Wahid, Umer Hayat, Alnour Mahmmoud Bokhary, Muhammad Usman Khan, Muhammad Mubashar Omar,Shuaishuai Ma, and Mahnoor Chishty1.1 Introduction 11.2 Microalgae Biology and Carbon Fixation Mechanism 31.2.1 Overview of Species 31.2.2 Photosynthesis and Carbon Capture: Role of RuBisCO and the Calvin Cycle 61.2.3 Carbon Concentrating Mechanism 81.3 Microalgae Cultivation Techniques for Carbon Sequestration 101.3.1 Open Pond Systems 101.3.2 Photobioreactors 101.3.3 Hybrid Systems 111.3.4 Use of Flue Gas 121.4 Carbon Sequestration Potential of Microalgae 121.4.1 CO2 Fixation Rates 121.4.2 Mass Balance and Carbon Conversion Efficiency: From CO2 to Biomass 131.4.3 Carbon Storage Forms 151.4.4 Life Cycle Assessment (LCA): Evaluating Carbon Net Savings 161.5 Applications of Microalgal Biomass from Carbon Sequestration 171.5.1 Biofuels 171.5.2 Biofertilizers 181.5.3 Animal Feed 181.5.4 Bioplastics 191.5.5 Pharmaceuticals and Nutraceuticals 191.6 Technological Innovations and Recent Advances 191.6.1 Genetic Engineering 201.6.2 Artificial Intelligence (AI) and IoT: Smart Monitoring of Cultivation Systems 211.6.3 Nanotechnology: Improving Light Penetration and Nutrient Absorption 221.6.4 Co-cultivation Systems: Symbiotic Growth with Other Microorganisms 231.7 Economic and Environmental Considerations 241.7.1 Cost Analysis: Capital and Operational Costs of Different Cultivation Systems 241.7.2 Market Potential: Demand for Bio-based Products from Microalgal Biomass 251.7.3 Environmental Impact: Reduction of Greenhouse Gases, Water Use, and Land Footprint 261.7.4 Policy and Incentives 271.8 Challenges to Carbon Emission and Sequestration 271.8.1 Technical Challenges: Scaling Up Production While Maintaining Efficiency 271.8.2 Economic Barriers: High Initial Investment and Competition with Fossil Fuels 281.8.3 Environmental Concerns: Water Use and Potential Contamination 291.9 Conclusions 301.10 Future Outlook 30References 312 Advances in Heterotrophic Microalgal Cultivation for Optimized Carbon Sequestration 37Shaswatee Bhattacharjee, Nilamjyoti Kalita, Hunmily Teronpi, Bhargish Nandan Gogoi, Shanydul Islam, and Partha Pratim Baruah2.1 Introduction 372.2 Strategies for Carbon Trapping 382.2.1 Biological Carbon Sequestration 392.2.2 Geological Carbon Sequestration 402.2.3 Chemical and Technological Carbon Trapping 402.3 Microalgae as a Carbon Sequester 412.4 Process Optimization for Enhanced Carbon Sequestration 422.4.1 pH 422.4.2 Temperature 432.4.3 Light/Photoperiod 432.4.4 Macro and Micronutrients 432.5 Cultivation Techniques 442.5.1 Circular Ponds 442.5.2 Unstirred Open Ponds 442.5.3 Raceway Pond 452.6 Bioreactor Design 452.7 Strain Engineering 462.8 Prospects of Carbon Sequestered Microalgae 472.8.1 Biofuels 472.8.2 Bioethanol 482.8.3 Bio-oil 492.8.4 Bioremediation 502.8.5 Fertilizer 502.8.6 Others 502.9 Challenges in Carbon Sequestration 512.10 Conclusion 52Acknowledgments 53References 533 Flue Gas Utilization in Microalgal Systems: A Sustainable Approach for Carbon Capture 61Saadia Ijaz and Shahida Hasnain3.1 Introduction 613.2 Flue Gas Mitigation Strategies 623.3 Flue Gas Mitigation with Microalgae 633.3.1 Microalgal Flue Gas Utilization Process 643.4 Mechanism of CO2 Fixation in Microalgae 653.4.1 Autotrophic Metabolism 653.4.2 Carbon Concentration Mechanism 673.5 Microalgal Cultivation Systems 683.5.1 Open Systems 683.5.2 Closed System 703.5.3 Hybrid System 713.6 Factors Affecting Flue Gas Mitigation by Microalgae 723.6.1 Effect of Flue Gas Composition 723.6.2 Types of Microalgal Strains 753.6.3 Effect of pH 763.6.4 Effect of Temperature 763.6.5 Effect of Light Irradiance 773.6.6 Effect of Flow and Mixing 783.6.7 Effect of Mass Transfer 793.7 Strategies to Enhance Flue Gas Capture 793.7.1 Biotechnological Strategies 793.7.2 Process Control and Engineering Strategies 823.8 Conclusion 85References 854 Optimizing Flue Gas-derived Nutrients for Algal Cultivation and Carbon Reduction 99Savita Singh, Avinash Singh, Mrinal, and Krishna Kumar Jaiswal4.1 Introduction 994.2 Flue Gas: Source and Characteristics 1004.3 Flue Gas-derived CO2 Separation via Adsorbents for Microalgal-based Bioremediation 1024.3.1 CO2 Separation Technologies 1024.3.2 Membrane Materials and Applications 1024.3.3 Technical and Operational Challenges 1034.3.4 Energy and Logistical Constraints 1034.3.5 Integration with Microalgal Systems 1034.4 CO2 Capture from Flue Gas via Chemical Absorbents and Their Regeneration for AlgalCultivation 1044.5 Microalgal CO2 Mitigation Using Liquid Phase Carbon Carriers and Direct Flue GasApplication 1054.6 Direct Flue Gas Utilization in Microalgal Cultivation Systems 1064.7 Microalgae Reduce NOx, SOx, and Heavy Metal Ions in Industrial Flue Gas 1084.7.1 NOx Reduction by Microalgae 1094.7.2 SOx Reduction by Microalgae 1094.7.3 Reduction of Heavy Metal Ions by Microalgae 1104.7.4 Microalgae for Carbon Dioxide Capture from Flue Gas 1114.8 Microalgae Cultivation Systems 1134.8.1 Open Pond Systems 1144.8.2 Raceway Ponds 1144.8.3 Multilayer Bioreactors 1164.8.4 Closed Cultivation Systems 1164.8.5 Genetic Enhancement and Enzymatic Strategies for Flue Gas Sequestration UsingMicroalgae 1164.8.6 Downstream Applications of Microalgal Biomass 1174.8.7 Life Cycle Assessment of Algal Cultivation 1194.8.8 Future Directions 1204.9 Conclusion 121References 1225 Integrating Microalgae with Power Plants: Carbon Sequestration and Emission Reduction Strategies 129Ahmed Elsayed Mahmoud Fodah, Taha Abdelfattah Mohammed Abdelwahab, Haiping Yang, and Sameh Samir Ali5.1 Introduction 1295.1.1 Background on Climate Change and Emissions 1295.1.2 Microalgae for Carbon Fixation 1305.1.3 Carbon Concentrating Mechanisms (CCMs) in Microalgae 1315.2 Power Plant Emissions 1345.2.1 Emission Points for Integration of Power Plant with Microalgae 1365.2.2 Challenges in Using Untreated Flue Gas Directly 1365.2.3 Emission Profiles from Different Power Plants 1375.3 Designs of Cultivation Systems 1385.3.1 Microalgae Integration Strategies with Power Plants 1405.3.2 Enhancing the Compatibility of Flue Gas Components with Microalgal Growth 1455.3.3 Integrated Systems for Wastewater Treatment 1465.4 Practical Applications and Economics 1485.4.1 Partnerships Between Power Plant Facilities and Algal Firms 1485.4.2 Carbon Pricing and ETS 1495.4.3 Incentives for Carbon Mitigation 1505.4.4 Evaluations of Techno-economic Analysis (TEA) 1515.5 Challenges and Future Perspectives in the Integration of Microalgae with Energy Generation Facilities 1525.6 Conclusion 154Abbreviation List 154References 1546 Integrating Microalgae in Wastewater Remediation and Biodiesel Production: Advancing Toward Carbon Neutrality 167Sameh S. Ali, Yasser El-Halmouch, Mohammad Magdy El-Metwally, Ahmed E. Fodah, Imran Ahmad, Katerina Klavdianou, Michael Kornaros, and Faizal Bux6.1 Introduction 1676.2 Major Pollutants in Aquatic Environments 1696.3 Microalgae in Wastewater Remediation 1726.3.1 Role of Microalgae in Wastewater Treatment 1766.3.2 Nutrient and Pollutant Removal Mechanisms 1766.3.3 Biomass Production and Biodiesel Potential 1786.3.4 Lipid Accumulation, Extraction, and Biodiesel Production 1796.3.5 Carbon Neutrality and Sustainability Assessment 1836.4 Conclusion 185References 1867 Utilizing Wastewater for Microalgal Cultivation: A Dual Approach to Carbon Capture and Water Treatment 197Sameh S. Ali, Hamad Qaiser, Ahmed E. M. Fodah, Amr H. H. Hashem, Eirini Sventzouri, Michael Kornaros, and Imran Ahmad7.1 Introduction 1977.2 Biology and Role of Microalgae in Environmental Remediation 1997.2.1 Overview of Microalgae (Types, Characteristics, Photosynthetic Efficiency) 1997.2.2 Growth Requirements: Light, CO2, Nutrients 2007.2.3 Mechanisms of Nutrient Removal: Nitrogen, Phosphorus, Heavy Metals 2027.2.4 Advantages Over Conventional Wastewater Treatment Methods 2077.3 Wastewater Characteristics and Suitability for Microalgal Cultivation 2087.3.1 Types of Wastewaters 2087.3.2 Key Parameters 2097.3.3 Pretreatment Requirements and their Effects on Algae Growth 2147.4 Carbon Capture Potential of Microalgae 2157.4.1 Photosynthetic CO2 Fixation Pathway 2167.4.2 Role of Flue Gas and Industrial CO2 Streams as Carbon Sources 2177.4.3 Integrating Microalgal Cultivation into Carbon Sequestration Strategies 2187.5 Wastewater Treatment Efficiency 2197.5.1 Case Studies or Examples Demonstrating COD, BOD, and TSS Reduction 2207.5.2 Regulatory Implications and Alignment with Environmental Standards 2247.6 Challenges and Future Perspectives 2267.7 Conclusion 227References 2288 Application of Microalgae and Other Microorganisms Co-cultivation Systems for a Circular Bioeconomy 247Villamil J.A., Levío-Raimán M., González-Fernández C., and Tomás-Pejó E8.1 Introduction 2478.2 Key Considerations When Co-culturing Microalgae With Other Microorganisms 2498.3 Applications of Microalgae Co-cultivation Systems 2518.3.1 Wastewater Treatment and Nutrients Recovery 2528.3.2 Biofuels Production 2568.3.3 Carbon Dioxide Biofixation 2598.4 Limitations and Challenges 2628.5 Conclusion 264Acknowledgments 264References 2659 Fundamentals and Applications of Photobioreactors for Carbon Capture—Part I 273Ihana Aguiar Severo, Walter José Martínez-Burgos, José Ignacio Gayo-Peláez, Alla Silkina, Jeremy Alexander Axle Sabo, and Payton Jade Walker9.1 Introduction 2739.2 Fundamentals of PBRs 2749.2.1 Design Types and Configurations 2759.3 Carbon Capture Using Photobioreactors 2829.3.1 Mechanisms of CO2 Uptake by Microalgae 2829.3.2 Environmental and Species-specific Factors 2899.3.3 Integration of Flue-gas and Industrial CO2 into PBRs 2939.3.4 Mass Transfer and Absorption Kinetics 2989.3.5 Case Studies 3039.4 Conclusion 305References 30610 Microalgae-based Photobioreactors for Carbon Capture: Challenges, Scale-Up, and Integration for Zero-discharge Systems—Part II 315Ihana Aguiar Severo, Walter José Martínez-Burgos, José Ignacio Gayo-Peláez, Alla Silkina, Jeremy Alexander Axle Sabo, and Payton Jade Walker10.1 Introduction 31510.2 Challenges to Industrial Deployment of Microalgal Systems 31610.2.1 Operational and Process-Level Challenges 31610.3 Regulatory, Infrastructure, and System Integration Barriers 32110.3.1 Policy Gaps and Uncertainty 32210.3.2 Environmental and Social Concerns 32310.3.3 Infrastructure Mismatch 32410.3.4 Pathways for Alignment 32410.4 Emerging Solutions and Pilot-scale Success Stories 32510.4.1 Technological Innovations Enabling Efficient CO2 Capture 32510.4.2 Pilot and Demonstration Projects 32710.4.3 Integration into the Circular Economy 32910.4.4 Lessons Learned and Scaling Opportunities 33110.5 Lifecycle Flowchart for Zero-Discharge Algal Carbon Capture 33310.6 Conclusion and Future Perspectives 335References 33511 Microalgae-based Solutions for Zero-discharge Concepts in Industrial Applications 341Nilay Kumar Sarker and Prasad Kaparaju11.1 Introduction 34111.2 Principles of Zero-discharge in Industrial Systems 34311.3 Microalgal Biology Relevant to ZDCs 34411.4 Waste Streams Suitable for Microalgae-based ZDCs 34611.4.1 High-nutrient Effluents 34711.4.2 High-salinity and Brine-based Effluents 34711.4.3 High-organic Load Streams 34811.4.4 Gas Emissions as Inputs 34811.5 Microalgal Integration into Zero-discharge System Designs 34911.5.1 PBR-based ZDC Modules 34911.5.2 HRAPs as Pre-treatment for ZDC 35011.5.3 Algal Biofilms and Attached-growth Systems 35111.6 Bioremediation Functions of Microalgae for Achieving Zero Discharge 35111.6.1 Nutrient Removal (N, P, K) 35211.6.2 Heavy Metal and Toxic Compound Removal 35211.6.3 Organic Pollutant Degradation 35211.6.4 Pathogen Reduction and Water Disinfection 35311.6.5 Practical Dimension 35311.7 Biomass Valorization Pathways Supporting Zero-discharge 35411.7.1 Bioenergy Routes 35411.7.2 High-value Products 35511.7.3 Biochar and Biofertilizers from Residual Biomass 35611.7.4 Circular Integration Model 35611.7.5 Practical Dimension 35611.8 Case Studies Across Industrial Sectors 35611.8.1 Textile and Dyeing Industry 35711.8.2 Mining and Metallurgical Industries 35811.8.3 Power Plants and Cement Kilns 35811.8.4 Aquaculture and Fisheries Processing 35911.8.5 Food and Beverage Processing Plants 35911.9 Technical Analysis 35911.9.1 Techno-economic Considerations 35911.9.2 Bottlenecks, Limitations, and Engineering Challenges 36011.10 Conclusion 361References 36212 Microalgae in Circular Bioeconomy: Closing the Loop in Carbon Utilization 365Charu Deepika and Roong Jien Wong12.1 Introduction 36512.2 Microalgae and CO2 Sequestration 37012.2.1 CO2 Fixation Pathways in Microalgae 37012.2.2 Photosynthetic Efficiency and Productivity Metrics 37212.2.3 CO2 Capture Potential: Quantitative Comparisons with Terrestrial Plants and CCS 37312.3 Microalgal Cultivation Strategies for Circularity 37612.3.1 Microalgae Cultivation Systems 37712.3.2 Utilization of Industrial Flue Gas as CO2 Source 37812.3.3 Wastewater as Nutrient Input: Closing the Nutrient Loop 37812.3.4 Energy and Resource Efficiency in Cultivation 37912.4 Biorefinery Concept and Biomass Valorization 38012.5 Circular Bioeconomy Models and Industrial Integration 38312.6 Sustainability and Economic Assessments (LCA and TEA) 38412.6.1 Environmental Trade-offs and System Boundaries 38612.6.2 Circularity Indicators and Metrics 38712.7 Challenges, Innovations, and Future Perspectives 38712.7.1 Key Challenges in Scaling Microalgal Solutions 38712.7.2 Technological and Bioprocess Innovations 38912.7.3 Towards a Net-zero and Circular Carbon Future 390References 39113 Harnessing Microalgae for Carbon Sequestration in Circular Bioeconomy Frameworks 399Eleni Pagkaki, Katerina Klavdianou, Eirini Sventzouri, Myrsini Sakarika, Rania Al-Tohamy, Sameh S. Ali, and Michael Kornaros13.1 Introduction: The Intersection of Decarbonization and Bioeconomy 39913.1.1 The Global Carbon Challenge 39913.1.2 Defining the Circular Bioeconomy 40013.1.3 Microalgae as a Green Platform 40013.2 Biological Mechanisms of Carbon Fixation 40113.2.1 Photosynthetic Efficiency 40213.2.2 Strain Selection for High-carbon Environments 40413.2.3 Metabolic Engineering 40513.3 Technologies for Harnessing Microalgae 40613.3.1 Cultivation Systems 40613.3.2 Coupling with Industrial Flue Gas 40813.3.3 Wastewater as a Nutrient Source 41213.4 Integration into Circular Bioeconomy Frameworks: The Algal Biorefinery Concept 41413.4.1 From Waste to Wealth: Product Pathways 41413.4.2 Closing the Loop: Recycling Residual Biomass 41713.5 Environmental Assessment 41713.6 Future Perspectives and Challenges 41813.6.1 Scaling Up: From Pilot to Industrial Implementation 41813.6.2 Regulatory and Policy Frameworks 42213.7 Conclusion 422References 42314 Production of Biofuel from Microalgae as a Strategy for Replacing Fossil Oil 431Cyro Hernandez Calixto and André Bellin Mariano14.1 The Global Energy Challenge and the Role of Biomass 43114.2 Potential of Microalgae as an Energy Feedstock 43314.3 Fundamentals and Thermochemical Routes for Synthetic Fuels 43414.3.1 Biochemical Composition of Microalgae and Conversion Implications 43714.3.2 Pyrolysis of Microalgae and Biocrude Production 43714.3.3 Hydrothermal Processing and Hydrothermal Liquefaction 44014.4 Microalgae Gasification and the Syngas Platform 44214.5 Intermediate Platforms: Biocrude and Syngas 44314.6 Refining and Synthesis from Intermediate Platforms: Distillation, Upgrading, and Catalytic Routes 44414.6.1 Atmospheric Distillation and Fractionation of Biocrude 44414.6.2 Biocrude Upgrading: Principles and Challenges 44514.6.3 Hydroprocessing: Hydrotreatment and Hydrocracking 44614.6.4 Integration with FCC (Fluid Catalytic Cracking) 44714.6.5 FT Synthesis and Methanol Route 45014.6.6 Process Integration 45314.7 Technical-economic and Cost-benefit Analysis of Routes 45614.8 Innovative Business Models and Industrial Integration 45714.9 Conclusions and Future Prospects 458References 46015 Life Cycle and Techno-economic Analysis (LCA and TEA) of Microalgal Systems: Evaluating Environmental and Economic Sustainability 463Katerina Klavdianou, Eirini Sventzouri, Eleni Pagkaki, Rania Al-Tohamy, Sameh S. Ali, and Michael Kornaros15.1 Introduction 46315.1.1 An Overview of Life Cycle Assessment (LCA) and Techno-economic Analysis (TEA) 46415.1.2 Establishing System Boundaries and Functional Unit 46515.2 Bibliometric Analysis 46615.3 Methodology and Standards 47115.3.1 LCA Frameworks and Standards 47115.3.2 TEA Frameworks 47115.3.3 Harmonization of Models: The Problem of Inconsistent Data and Assumptions in Current Literature 47215.4 LCA: Environmental Impacts 47615.4.1 Life Cycle Inventory (LCI) Analysis 47815.4.2 Impact Categories 48215.5 Techno-economic Analysis 48415.5.1 Capital Expenditures 48415.5.2 Operational Expenditures 48515.6 Comparative Scenarios and Trade-offs 48615.6.1 Cultivation System 48615.6.2 Product Value Pyramid 48715.7 Strategies for Improving Economics and Sustainability 48815.7.1 The Biorefinery Approach 48815.7.2 Circular Integration 48915.8 Conclusion and Future Outlook 490References 49116 Future Direction Scaling Microalgae-driven Carbon Capture in a Circular Bioeconomy 503Mohamad Padri and Ananda Nuryadi Pratama16.1 Introduction 50316.2 Engineering and Scientific Considerations for Scaling Up 50416.2.1 Laboratory Development to Actual Scale Cultivation 50416.2.2 Large-scale Cultivation System 50616.2.3 Key Scale-up Challenges 50916.2.4 Strains Sources for Carbon Capture Process 51116.2.5 Digitalization, Automation, and Artificial Intelligence 51216.3 Integration into Circular Biorefineries 51416.3.1 Biorefinery Concept for Microalgae Carbon Capture System 51416.3.2 Wastewater Utilization for Carbon Capture 51616.3.3 Application of Close Loop System for Microalgae-based Carbon Capture 51716.4 Current Challenges in Microalgae-based Carbon Capture 51816.4.1 Cultivation Instability and Operational Limitations 51816.4.2 Harvesting, Dewatering, and Downstream Constrains 51916.4.3 Nutrient Level and Culture Demand 52016.4.4 Economic Aspects and Scalability 52016.4.5 Scientific and Engineering Gaps for Field Execution 52116.5 Future Directions and Development Projection 52216.5.1 Advancements in Biological Engineering and Strain Development 52216.5.2 Engineering and Operational Aspects 52216.5.3 Integration with Actual System and Utilization of Emission Sources 52316.5.4 Continuation of Application by Applying Circular Bioeconomy Concept 52416.6 Conclusion 524References 52517 Case Studies in Microalgal Technologies: Real-world Applications and Lessons for Carbon Sequestration and Circular Bioeconomy 531Muhammad Shahid, Abdul Wahid, Umer Hayat, Alnour MahmmoudBokhary, Muhammad Usman Khan, Muhammad Mubashar Omar, Shuaishuai Ma, and Mahnoor Chishty17.1 Introduction 53117.2 Microalgae Distribution and Abundance 53417.3 Carbon Sequestration by Microalgae 53517.3.1 Major Economically Useful Microalgal Species in the Oceanic World 53517.3.2 Efficiency of Microalgal Species in Carbon Sequestration 53817.4 Carbon Sequestration and Microalgae-based Technologies 54017.4.1 Power Plants: Capturing CO2 from Industrial Flue Gases 54117.4.2 Cement Industry: Reducing CO2 Emissions through Algal Absorption 54117.4.3 Breweries: Utilizing Fermentation Emissions for Algal Growth 54117.4.4 Steel Industry: Microalgae-based Carbon Capture 54217.5 Microalgae as a Key Player in the Circular Bioeconomy 54217.5.1 Microalgae in Bioenergy and Biofuels 54217.5.2 Microalgae in Bioplastics and Packaging 54317.5.3 Microalgae in Nutraceuticals and Animal Feed 54417.5.4 Microalgae in Wastewater Treatment and Soil Restoration 54417.5.5 Microalgae in Health and Cosmetics 54417.6 Conclusion 54517.7 Future Outlook 546References 54618 Public Perceptions, Policy Frameworks, and Regulatory Pathways: Overcoming Challenges for Microalgae Adoption 555Nilay Kumar Sarker and Prasad Kaparaju18.1 Introduction 55518.2 Public Perceptions: Barriers and Opportunities 55618.2.1 Awareness and Understanding of Microalgae-based Products 55618.2.2 Consumer Acceptance of Algae-derived Foods and Bioproducts 55718.2.3 Social Acceptance of Algae Cultivation Facilities 55818.2.4 Strategies to Improve Public Perception 55918.3 Policy Frameworks Shaping Microalgae Adoption 56018.3.1 Overview of Relevant Policy Domains 56118.3.2 National and Regional Differences 56118.3.3 Cross-sector Policy Inconsistencies 56218.3.4 The Role of Incentives, Subsidies, and Market Instruments 56318.4 Regulatory Pathways: Current Landscape and Bottlenecks 56418.4.1 Regulatory Actors and Responsibilities 56418.4.2 Legal Classification Challenges 56418.4.3 Facility Permitting and Compliance 56518.4.4 International Trade and Standards 56618.5 Case Studies 56618.5.1 Wastewater Treatment and Biofertilizer Production: A Case of Operational Success With Regulatory Hesitation 56718.5.2 Functional Food and Feed Industries: High Commercial Potential with Cost and Compliance Failures 56718.5.3 Wastewater Bioremediation and Pollution Control 56818.5.4 Bioprocessing and Industrial Scale-Up 56918.5.5 Comparative Analysis 57018.6 Integrative Framework: Linking Public Perceptions, Policy, and Regulation 57118.6.1 The Socio-technical Adoption Model for Microalgae 57118.6.2 Identifying Leverage Points 57218.6.3 Role of Multi-stakeholder Collaboration 57218.7 Pathways to Overcome Adoption Challenges 57318.7.1 Policy Reforms 57318.7.2 Public Engagement Strategies 57418.7.3 Industry Best Practices 57518.7.4 Research and Innovation Priorities 57518.8 Conclusion and Future Perspectives 576References 57719 Emerging Frontiers in Microalgal Innovation: AI Integration, Genetic Engineering, and Next-generation Technologies 581Tarek Mahrous, Tamer Elsamahy, Esraa A. Abdelkarim, Osama Abdalla Abdelshafy Mohamad, and Ahmed Elsayed Mahmoud Fodah19.1 Introduction 58119.2 AI in Microalgal Systems 58319.2.1 AI in Strain Identification, Classification, and Process Optimization 58319.2.2 Real-time Monitoring and Control 58619.3 Genetic Engineering and Synthetic Biology Approaches 58719.3.1 Genome Editing Tools 58719.3.2 Metabolic Pathway Engineering 59119.4 Next-generation Cultivation Technologies 59419.4.1 Smart and AI-driven Photobioreactors 59419.4.2 Microfluidics and High-throughput Screening 59519.5 Integration and Synergy: Building Programmable Biofactories 59719.6 Challenges and Ethical Considerations 60019.6.1 Biosafety and Ecological Risks of Genetically Modified Algae 60019.6.2 Data Privacy and Transparency in AI-driven Processes 60019.6.3 Regulatory Landscapes and Public Perception 60119.7 Outlook 60119.7.1 Emerging Trends: Quantum AI, Self-evolving Strains, and Biofoundries 60219.7.2 Interdisciplinary Training and Collaboration 60219.7.3 Roadmap for Commercial and Ecological Deployment 60319.8 Conclusion 603References 604Index 613