By Birgitte K. Ahring (Editor)
Anaerobic digestion is a tremendous box for the remedy of waste and wastewater. in recent years the point of interest has been at the caliber of the effluent atmosphere new calls for for pathogen elimination and for profitable removing of undesirable chemical compounds in the course of the anaerobic approach. the 2 volumes on Biomethanation are dedicated to providing the nation of paintings in the technology and alertness of anaerobic digestion. They describe the fundamental microbiolgical wisdom of value for knowing the techniques of anaerobic bioreactors besides the most recent molecular innovations for studying those structures. additionally, the purposes for therapy of waste and wastewaters are awarded besides the newest wisdom on strategy regulate and legislation of anaerobic bioprocesses. jointly those volumes supply an summary of a starting to be zone, which formerly hasn't ever been awarded in one of these complete means.
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Extra resources for Advances in Biochemical Engineering & Biotechnology, Volume 082, Biomethanation II
For sludges with higher ash content, serious decreases of methanogenic activity have been reported [86, 97, 98]. The main components of the ash content of the granules are calcium, potassium, phosphorus, magnesium, sodium, iron, and trace elements such as Ni and Co . Bhatti et al.  showed that not all the ash content of granular sludge fed with brewery wastewater was composed of metals but also contained materials similar to silica and/or silt. Weight calculations revealed that about 50% of the ash consisted of inorganic silica and silt while the other 50% consisted of metals.
In this way, initial granulation can be enhanced by addition of crushed granulated sludge (up to 8%) or inert materials [76, 151, 157, 163], which then serve as granule precursors. The granulation process in UASB reactors inoculated with suspended anaerobic sludge can also be accelerated by the supplementation of the reactors with natural or synthetic polymers that act similarly to the extracellular polymeric substances in the granules . V. Skiadas et al. one that has been shown to have the ability to degrade the actual wastewater.
Ahring BK, Sandberg M, Angelidaki I (1995) Appl Microbiol Biotechnol 6. Dugba PN, Zhang H (1999) Bioresour Technol 68:225 7. Whitmore TN, Lazzari M, Lloyd D (1985) Biotechnol Lett 7:283 8. van Lier JB, Rebac S, Lettinga G (1996) In: Proceedings of the IASWQ-NVA Int. conf. on advanced wastewater treatment 9. Varel VH, Hashimoto AG, Chen YR (1980) Appl Environ Microbiol 40:217 10. Hashimoto AG (1982) Agriculural Wastes 4:345 11. Ahring BK (1995) Ant van Leeuw 67:91 12. Chen YR, Day DL (1986) Agriculural Wastes 16:313 13.