Abstract
Microbiological examinations have been performed over the last 3 years at 3 large sewage treatment plants in the greater Stockholm area. All 3 plants have periodically suffered from excessive growth of the filamentous bacterium Microthrix parvicella. The growth of Microthrix parvicella was favored by low sludge loading. Results from various plants and from the various parallel systems within the individual plants were compared. The bacterial composition of the activated sludges differed in ways that could not be explained by the sludge loading or the sewage composition. Biological processes in the secondary clarifiers seem to influence the competition between the different organisms in the activated sludge. A clear relationship was shown between high sludge retention time in the secondary clarifiers, VFA production in the return activated sludge (RAS) and a high abundance of Microthrix parvicella.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
