Author/Editor		Toman, MJ; Roš, M
Title		Biodegradation and concomitant biocenosis development in a fluidised bed reactor
Translated title		Biokemijska razgradnja in razvoj spremljajoče združbe v reaktorju s fluidizirano biomaso
Type		članek
Source		Acta Biol Slov
Vol. and No.		Letnik 42, št. 2
Publication year		1999
Volume		str. 17-25
Language		eng
Abstract		Compared to activated sludge, immobilised biomass proved to be more efficient when biodegradation is concerned. Different support particles may be used, among them quartz sand is rather common. Degradation of synthetic wastewater (with ingredients simulating food processing industry wastewater) in a laboratory fluidised bed reactor filled with 250-315 qm support material was studied as well as the appearance and development of fixed and suspended biomass. Biodegradation in tluidised bed reactors depends on N and P compounds in raw wastewater. In case of treatment efficiency up to 95% according to BODs, the suitable ratio BODS:N:P is 100:3:0.5. In the experimental reactor, biomass distributed into three layers. Concerning biodegradation, the fluidised (turbulent) layer with immobilised biomass appeared to be the most important one. The biofilm development starts with the attachment of dispersed bacteria, followed by filamentous microorganisms (bacteria and fungi), protozoa and particular metazoa, e.g. nematodes. However, in the fluidised bed reactor biomass, no rotifers could be detected, although they seem to be an important part of the concomitant biocenosis of activated sludge.
Descriptors		SEWAGE ECOSYSTEM BIODEGRADATION BIOMASS FOOD-PROCESSING INDUSTRY NITROGEN PHOSPHORUS