« Previous AbstractEpidermis and pheromone production in males of the desert locust    Next Abstract"Correction: Extracting the Behaviorally Relevant Stimulus: Unique Neural Representation of Farnesol, a Component of the Recruitment Pheromone of Bombus terrestris" »

Appl Environ Microbiol

Title:		Development and evaluation of an online CO(2) evolution test and a multicomponent biodegradation test system
Author(s):		Strotmann U; Reuschenbach P; Schwarz H; Pagga U;
Address:		"Fachhochschule Gelsenkirchen, Department of Environmental Engineering, University of Applied Sciences, Neidenburger Str. 10, 45877 Gelsenkirchen, Germany. uwe.strotmann@fh-gelsenkirchen.de"
Journal Title:		Appl Environ Microbiol
Year:		2004
Volume:		70
Issue:		8
Page Number:		4621 - 4628
DOI:		10.1128/AEM.70.8.4621-4628.2004
ISSN/ISBN:		0099-2240 (Print) 1098-5336 (Electronic) 0099-2240 (Linking)
Abstract:		"Well-established biodegradation tests use biogenously evolved carbon dioxide (CO(2)) as an analytical parameter to determine the ultimate biodegradability of substances. A newly developed analytical technique based on the continuous online measurement of conductivity showed its suitability over other techniques. It could be demonstrated that the method met all criteria of established biodegradation tests, gave continuous biodegradation curves, and was more reliable than other tests. In parallel experiments, only small variations in the biodegradation pattern occurred. When comparing the new online CO(2) method with existing CO(2) evolution tests, growth rates and lag periods were similar and only the final degree of biodegradation of aniline was slightly lower. A further test development was the unification and parallel measurement of all three important summary parameters for biodegradation--i.e., CO(2) evolution, determination of the biochemical oxygen demand (BOD), and removal of dissolved organic carbon (DOC)--in a multicomponent biodegradation test system (MCBTS). The practicability of this test method was demonstrated with aniline. This test system had advantages for poorly water-soluble and highly volatile compounds and allowed the determination of the carbon fraction integrated into biomass (heterotrophic yield). The integrated online measurements of CO(2) and BOD systems produced continuous degradation curves, which better met the stringent criteria of ready biodegradability (60% biodegradation in a 10-day window). Furthermore the data could be used to calculate maximal growth rates for the modeling of biodegradation processes"
Keywords:		"Aniline Compounds/metabolism Bacteria/*metabolism Biodegradation, Environmental Biomass Carbon Dioxide/*metabolism Electric Conductivity Electrodes Environmental Monitoring/methods Oxygen/pharmacology Oxygen Consumption Sewage/*microbiology Sodium Benzoat;"
Notes:		"MedlineStrotmann, Uwe Reuschenbach, Peter Schwarz, Helmut Pagga, Udo eng Evaluation Study 2004/08/06 Appl Environ Microbiol. 2004 Aug; 70(8):4621-8. doi: 10.1128/AEM.70.8.4621-4628.2004"