Download Advances in Biochemical Engineering & Biotechnology, Volume by Birgitte K. Ahring (Editor) PDF

By Birgitte K. Ahring (Editor)

Anaerobic digestion is an important box for the remedy of waste and wastewater. in recent times the focal point has been at the caliber of the effluent environment new calls for for pathogen removing and for profitable elimination of undesirable chemical substances throughout the anaerobic technique. the 2 volumes on Biomethanation are dedicated to offering the country of paintings in the technology and alertness of anaerobic digestion. They describe the fundamental microbiolgical wisdom of significance for knowing the techniques of anaerobic bioreactors in addition to the latest molecular options for analyzing those structures. moreover, the functions for remedy of waste and wastewaters are provided besides the newest wisdom on strategy keep watch over and legislation of anaerobic bioprocesses. jointly those volumes provide an summary of a growing to be zone, which formerly hasn't ever been awarded in this kind of entire manner.

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60 . . . . . . . . . . . . . . . 61 Abbreviations ABR ANAMMOX COD CSTR ECP EGSB HRT OLR PABR SMA SRB TS UASB USSB VFA VSS vup Anaerobic baffled reactor Anaerobic ammonium oxidation Chemical oxygen demand Continuously stirred-tank reactor Extracellular polymers Expanded granular sludge bed Hydraulic retention time Organic loading rate Periodic anaerobic-baffled reactor Specific methanogenic activity Sulfate-reducing bacteria Total solids Up-flow anaerobic sludge bed Up-flow Staged Sludge Bed Volatile fatty acids Volatile suspended solids Liquid up-flow velocity 1 Introduction Conventional anaerobic treatment systems have traditionally been used for the stabilization of sludge effluents such as sewage sludge and manure, during the last century.

Ahring BK (1995) Ant van Leeuw 67:91 12. Chen YR, Day DL (1986) Agriculural Wastes 16:313 13. Fang HHT, Wai-Chung Chung D (1999) Water Sci Technol 40:77 14. Archer DB (1983) Enzyme Microb Technol 5:162 15. Buhr HO, Andrews JF (1977) Wat Res 11:129 16. Varel VH, Isaacson HR, Bryant MP (1977) Appl Environ Microbiol 33:298 17. Hashimoto AG (1982) Biotechnol Bioeng 14:2039 18. Mackie RI, Bryant MP (1981) Appl Environ Microbiol 41:1363 19. Madamwar D, Patel A, Patel V (1990) J Ferment Bioeng 70:340 20.

The granular sludge bed is located in the bottom of the reactor where the biomass settles as granules. The wastewater is fed from the bottom of the reactor and flows upward through the sludge bed. Here the main part of the organic compounds is biologically degraded and biogas is produced. On top of the granular sludge bed, a fluidized zone is developed due to the biogas production within the granules. In this zone further biological degradation can take place. The produced biogas mixed with floated sludge is collected in the gas-solids separator located on the top section of the reactor, where it is separated and flows out of the reactor.

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