Assessment of metabolic activity of single and mixed microorganism population assigned for potto wstewater biodegradation

Christopher Kent, M Lasik, J Nowak, Z Czarnecki

Research output: Contribution to journalArticle


An attempt was made to characterise thermophilic microflora isolated in an industrial plant utilising food industry waste. Initial estimation of environmental requirements of a mixed microorganism population was performed using the method measuring changes in electrical impedance by means of the BacTrac 4100 Automatic Microorganisms Growth Analyzer. Control of the dynamics of microorganism growth on broth media supplemented with sources of carbon, nitrogen and phosphorus and at various pH allowed initial assessment of their environmental requirements. The course of alterations in electrical impedance during culturing of both single isolates and mixed microorganism populations can be described by means of Gompertz's curve characteristic for bacteria growth with a very high correlation coefficient. The mixed microorganism population and isolates obtained from it were also characterised from the point of view of their biodegradation potentials of wastewater obtained in the potato processing industry. Biodegradation processes carried out in conditions of shake flask cultures at a temperature of 55degreesC showed higher reducing potentials of chemical oxygen demand (COD) of a mixed bacteria culture. Single isolates were characterised by a distinctly inferior metabolic activity and lower biodegradation potentials of "hot" potato wastewater.
Original languageEnglish
Pages (from-to)719-725
Number of pages7
JournalPolish Journal of Environmental Studies
Issue number6
Publication statusPublished - 1 Jan 2002


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