Anaerobic Digestion -- Using pretreatment and enzymatic saccharification technologies to produce fermentable sugars from agricultural wastes -- Various sludge pretreatments: their impact on biogas generation -- Hydrolysis of Lignocellulosic Biomass for Recovering Hemicellulose: State-of-the-Art -- Latent potential of Microalgal Biomass: Research Efforts and Challenges -- Treatment of dye wastewater for water reuse using membrane bioreactor and biofouling control -- Economic and Market Value of Biogas Technology -- Biomass Gasification -- Activated Carbon from Renewable Sources: Thermochemical conversion and activation of biomass and carbon residues from biomass gasification -- Pyrolysis of Biomass -- Liquefaction of biomass for bio-oil products -- Intensified Synthesis of bio-ethanol from sustainable biomass -- Current approaches in producing oil and biodiesel from microalgal biomass -- Intensified Synthesis of Biodiesel from Sustainable Raw Materials Using Enzymatic Approach -- An integrated approach for efficient energy recovery production from livestock and agro-industrial wastes -- An integrated approach for efficient energy recovery production from livestock and agro-industrial wastes -- Microbial Fuel Cells: Types and Applications. .