Anaerobic digestion : modern theory and practice

Part 1 The microbiology and biochemistry of anaerobic digestion: general considerations substrate degradations physical factors enumerating the bacteria the breakdown of carbohydrates. Part 2 Mathematical models: the economic and engineering model the biological model general considerations the stirred-tank digester steady-state models. Part 3 Types of digesters and their construction: design and operation sludge and slurry digesters the contact digester anaerobic filters the upflow sludge blanket (UASB) digester. Part 4 Pretreatment of feedstocks: physical pretreatments removal of digestible solids, or of liquids removal of non-biodegradable solids mainly biological pretreatments particle-size reduction. Part 5 Digestion of high-solids feedstocks: simple and modified batch digesters fed-batch digesters continuous-flow stirred tanks the climatically-heated, small-farm digester the "standard" stirred-tank sewage digester. Part 6 Digestion of low-solids feedstocks: the "feedback" or "contact" digester the anaerobic filter the expanded- or fluidized-bed digester baffled and similar upflow sludge-blanket digester baffled and similar digesters. Part 7 Uses of digester products: use as fertilizer animal feedstuffs indirect use to produce animal or human feeds biogas. Part 8 Running and control of digesters: safety physical control systems analytical control systems. Appendix: glossary of terms types of digester terms used in digester running terms used in descriptions of wastes and their treatment.