P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Anaerobic Biotechnology for Bioenergy Production Principles and Applications Anaerobic Biotechnology for Bioenergy Produc tion: Principles and Applications Samir Kumar Khanal © 2008 John Wiley & Sons, Inc. ISBN: 978-0-813-82346-1 P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Anaerobic Biotechnology for Bioenergy Production Principles and Applications SAMIR KUMAR KHANAL University of Hawai‘i at Ma¯noa A John Wiley & Sons, Ltd., Publication P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Editionfirstpublished2008 (cid:2)C 2008SamirKhanal BlackwellPublishingwasacquiredbyJohnWiley&SonsinFebruary2007.Blackwell’spublishingprogramhasbeen mergedwithWiley’sglobalScientific,Technical,andMedicalbusinesstoformWiley-Blackwell. 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P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Contents CONTRIBUTORS, xi PREFACE, xiii 1 OVERVIEW OF ANAEROBIC BIOTECHNOLOGY, 1 SamirKumarKhanal 1.1 Anaerobic Biotechnology and Bioenergy Recovery, 1 1.2 Historical Development, 3 1.3 Importance of Anaerobic Biotechnology in Overall Waste Treatment, 5 1.4 Definition and Principle of Anaerobic Processes, 6 1.5 Important Considerations in Anaerobic Biotechnology, 8 1.6 Merits of Anaerobic Biotechnology, 15 1.7 Limitations of Anaerobic Process, 22 References, 25 2 MICROBIOLOGY AND BIOCHEMISTRY OF ANAEROBIC BIOTECHNOLOGY, 29 SamirKumarKhanal 2.1 Background, 29 2.2 Organics Conversion in Anaerobic Systems, 29 2.3 Process Microbiology, 32 References, 41 3 ENVIRONMENTAL FACTORS, 43 SamirKumarKhanal 3.1 Background, 43 3.2 Temperature, 43 3.3 Operating pH and Alkalinity, 47 3.4 Nutrients, 55 v P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 vi Contents 3.5 Toxic Materials, 56 3.6 Redox Potential or Oxidation–Reduction Potential, 59 References, 61 4 KINETICS AND MODELING IN ANAEROBIC PROCESSES, 65 KeshabRajSharma 4.1 Background, 65 4.2 Basic Elements, 66 4.3 Stepwise Approach to Modeling, 69 4.4 Modeling of pH Change, 79 4.5 Modeling of Energy Generation, 87 References, 92 5 ANAEROBIC REACTOR CONFIGURATIONS FOR BIOENERGY PRODUCTION, 93 SamirKumarKhanal 5.1 Background, 93 5.2 Strategies for Decoupling HRT and SRT, 93 5.3 Classification of Anaerobic Bioreactors, 94 5.4 Membrane Technology for Syngas Fermentation to Ethanol, 112 References, 114 6 MOLECULAR TECHNIQUES IN ANAEROBIC BIOTECHNOLOGY: APPLICATION IN BIOENERGY GENERATION, 115 SrisudaDhamwichukorn 6.1 Background, 115 6.2 Molecular Techniques in Anaerobic Biotechnology, 115 6.3 Fundamentals of Molecular Techniques, 116 6.4 Phylogenetic Analysis, 117 6.5 Molecular Techniques for Microbial Community Structure Analysis: DNA Fingerprinting, Clone Library, and Fluorescent in Situ Hybridization, 118 6.6 Molecular Techniques for Functional Analysis, 121 6.7 Nucleic Acid Extraction of Anaerobic Cells/Isolates and Sludge, 123 6.8 Molecular Techniques for Structure and Function Analysis, 123 6.9 Postgenomic Approaches for Bioenergy Research, 128 References, 130 P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Contents vii 7 BIOENERGY RECOVERY FROM SULFATE-RICH WASTE STREAMS AND STRATEGIES FOR SULFIDE REMOVAL, 133 SamirKumarKhanal 7.1 Background, 133 7.2 Sulfate-Reducing Bacteria, 133 7.3 High-Strength Sulfate-Rich Wastewater, 135 7.4 Methane Recovery from High-Strength Sulfate-Laden Wastewater, 135 7.5 Important Considerations in Treatment and Methane Recovery from High-Strength Sulfate-Laden Wastewater, 137 7.6 Interactions between MPB and SRB, 143 7.7 Sulfide Removal, 149 References, 157 8 BIOENERGY GENERATION FROM RESIDUES OF BIOFUEL INDUSTRIES, 161 SamirKumarKhanal 8.1 Background, 161 8.2 Bioethanol Feedstocks, 162 8.3 Biodiesel Feedstocks, 163 8.4 Ethanol Production, 163 8.5 Thin Stillage Characterization, 171 8.6 Cassava-Based Ethanol Production, 183 8.7 Cellulose-Based Ethanol Production, 185 8.8 Bioenergy Recovery from Crude Glycerin, 186 References, 187 9 BIOHYDROGEN PRODUCTION: FUNDAMENTALS, CHALLENGES, AND OPERATION STRATEGIES FOR ENHANCED YIELD, 189 SamirKumarKhanal 9.1 Background, 189 9.2 Biological Hydrogen Production, 190 9.3 Microbiology of Dark Fermentation, 191 9.4 Hydrogen Production Pathway through Dark Fermentation, 192 9.5 Suppression of Hydrogen Consumers, 196 9.6 Hydrogen Yield, 199 P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 viii Contents 9.7 Important Considerations in Biohydrogen Production, 200 9.8 Limitations of Dark Fermentation and Potential Remedial Options, 210 9.9 Technoeconomic Analysis of Hydrogen Fermentation, 213 References, 215 10 MICROBIAL FUEL CELL: NOVEL ANAEROBIC BIOTECHNOLOGY FOR ENERGY GENERATION FROM WASTEWATER, 221 HongLiu 10.1 Background, 221 10.2 How Does a Microbial Fuel Cell Work?, 222 10.3 Stoichiometry and Energetics, 223 10.4 Electrochemically Active Microbes and Electron Transfer Mechanisms, 225 10.5 Evaluation of MFC Performance, 228 10.6 MFC Designs and Electrode Materials, 231 10.7 Operational Factors Affecting MFC Performance, 239 10.8 Opportunities and Challenges for MFCs in Wastewater Treatment, 242 References, 243 11 PRETREATMENT OF HIGH-SOLIDS WASTES/RESIDUES TO ENHANCE BIOENERGY RECOVERY, 247 SanthaHarikishan 11.1 Background, 247 11.2 Efficiency of Sludge Pretreatment, 248 11.3 Ultrasound Pretreatment, 250 11.4 Chemical and Physical Pretreatment, 257 11.5 Thermal Hydrolysis, 261 11.6 Impact of Improved Digestibility on Overall Process Economics, 264 References, 264 12 BIOGAS PROCESSING AND UTILIZATION AS AN ENERGY SOURCE, 267 SanthaHarikishan 12.1 Background, 267 12.2 Biogas Production, 267 P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Contents ix 12.3 Factors Affecting Digester Gas Production, 269 12.4 Biogas Composition, 270 12.5 Biogas Impurities, 272 12.6 Biogas Cleaning for Effective Utilization, 274 12.7 Biogas Utilization, 279 12.8 Future of Biogas as a Renewable Resource, 290 References, 291 INDEX, 293 P1:SFK/UKS P2:SFK/UKS QC:SFK/UKS T1:SFK BLBS011-Khanal 9780813823461 July11,2008 15:3 Contributors SrisudaDhamwichukornisPresidentandChiefScientistofPacificTimeCo.Ltd. andUniverseandScienceCo.Ltd.,Bangkok,Thailand.ShereceivedherPh.D.in environmentalbiotechnologyfromMichiganTechnologicalUniversity,Michigan, andwasPostdoctoralResearchAssociateattheUniversityofNotreDame,Indiana. Dr Dhamwichukorn’s research interests are in microbial community analysis us- ingmoleculartechniques,bioremediation,applicationsofDNAmicroarrays,and bioinformatics. Santha Harikishan is a Process Engineer at Black and Veatch, Kansas City, Mis- souri. He obtained his M.S. in environmental engineering from Iowa State Uni- versity. Santha has extensive practical experience with biosolids processing and bioenergy production. He is actively involved in process and facility design for wastewater treatment plants, and evaluation and development of residuals man- agementschemesfortreatmentfacilities. Hong Liu is an Assistant Professor of Biological and Ecological Engineering at Oregon State University. She obtained her Ph.D. in environmental engineering fromtheUniversityofHongKongandreceivedpostdoctoraltrainingatPennsyl- vaniaStateUniversity.DrLiuhaspublishedover30researchpapers,mainlyinthe areas of microbial fuel cell and biohydrogen production. She and her coworkers atPennsylvaniaStateUniversitywonPopularMechanics2005BreakthroughAward fortheirinventionofabioelectrochemicallyassistedprocessforhydrogengenera- tion.Hercurrentresearchinterestsareintheareasofenvironmentalbiotechnology, microbialfuelcell,andbioenergyproduction. KeshabRajSharmaisaResearchFellowinAdvancedWaterManagementCenter at the University of Queensland, Australia. He received Ph.D. in environmental engineering from the Hong Kong University of Science and Technology, Hong Kong. Dr Sharma’s research focuses on biofilm processes, and process modeling andsimulationofbiologicalsystems. xi
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