Stalked protozoa identification by image analysis and multivariable statistical techniques

Amaral, A. L.; Ginoris, Y. P.; Nicolau, A.; Coelho, M. A. Z.; Ferreira, E. C.
June 2008
Analytical & Bioanalytical Chemistry;Jun2008, Vol. 391 Issue 4, p1321
Academic Journal
Protozoa are considered good indicators of the treatment quality in activated sludge systems as they are sensitive to physical, chemical and operational processes. Therefore, it is possible to correlate the predominance of certain species or groups and several operational parameters of the plant. This work presents a semiautomatic image analysis procedure for the recognition of the stalked protozoa species most frequently found in wastewater treatment plants by determining the geometrical, morphological and signature data and subsequent processing by discriminant analysis and neural network techniques. Geometrical descriptors were found to be responsible for the best identification ability and the identification of the crucial Opercularia and Vorticella microstoma microorganisms provided some degree of confidence to establish their presence in wastewater treatment plants.


Related Articles

  • Monitoring of activated sludge settling ability through image analysis: validation on full-scale wastewater treatment plants. D. Mesquita; O. Dias; E. Ferreira // Bioprocess & Biosystems Engineering;Apr2009, Vol. 32 Issue 3, p361 

    Abstract  In recent years, a great deal of attention has been focused on the research of activated sludge processes, where the solid–liquid separation phase is frequently considered of critical importance, due to the different problems that severely affect the compaction and the...

  • Operational results and experience with submerged fixed-film reactors in the pretreatment of industrial effluents Teichgraber, B.; Schlegel, S. // Water Science & Technology;2000, Vol. 41 Issue 4/5, p453 

    Submerged fixed-film reactors are ideal for the pretreatment of industrial effluents. The advantages lie not only in the investment costs, but also in the operating costs. The pretreatment plants can be subject to higher loads than are possible with the activated sludge process. Consequently,...

  • Industry briefs.  // WaterWorld;Oct96, Vol. 12 Issue 9, p3 

    Presents news items related to wastewater industry in the United States as of October 1996. Includes President Bill Clinton's proposed spending to allow the US Geological Survey to extend water quality testing to 75 key cities; Stormwater reuse project at the Hillsborough Country courthouse;...

  • Region 5 recognizes outstanding sewage treatment plants.  // WaterWorld;May98, Vol. 14 Issue 5, p7 

    Discloses that the US Environmental Protection Agency Region 5 has given awards to four sewage treatment plants for excellence in industrial wastewater pretreatment. Names of plants that received awards; Requirements for maintaining an effective pretreatment program; Role of industrial...

  • Inhibition Monitoring for Rapid Wastewater Screening. Wooten, Steven // WaterWorld;Jan2001, Vol. 17 Issue 1, p26 

    Presents a method for the control of discharges from industrial waste generators sewage disposal plants. Identification of shock loads with a biomonitoring instrument; Monitor of toxic materials in the influent; Analysis of the wastewater.

  • The Ultimate Outhouse.  // ENR: Engineering News-Record;01/04/99, Vol. 242 Issue 1, p22 

    Reveals that residents of Springfield Townhomes, Pennsylvania have opposed plans to site a wastewater treatment plant in their midst. What the plan includes; Remarks from David S. Davidson, Jr., president of consulting engineer C.S. Davidson Inc.; Amount of money in costs due to changes to the...

  • Protozoan Fauna and Abundance in Aeration Tanks of Three Municipal Wastewater Treatment Plants in the Eastern Cape Province of South Africa. Sibewu, M.; Momba, M. N. B.; Okoh, A. L. // Journal of Applied Sciences;2008, Vol. 8 Issue 11, p2112 

    This study focuses on the assessment of the protozoan fauna and abundance in the mixed liquors of aeration tanks of the three municipal wastewater treatment plants located in Fort Beaufort, Dimbaza and East London in the Eastern Cape Province of South Africa and their implication to the...

  • Microbial evaluation of activated sludge and filamentous population at eight Czech nutrient removal activated sludge plants during year 2000. Krhutkova, O.; Ruzickova, I.; Wanner, J. // Water Science & Technology;2002, Vol. 46 Issue 1/2, p471 

    Presents the results of microbial evaluation of activated sludge and filamentous population at nutrient removal activated sludge plants in Czech Republic. Relationship between the composition of activated sludge consortia and modification of the process with nutrient removal; Presence of...

  • Greif Mill Faces Wastewater Problems.  // Official Board Markets;7/17/2010, Vol. 86 Issue 29, p13 

    The article reports on the joint effort between the Massillon, Ohio officers and Greif Bros. Corp. to resolve wastewater problems after sewer line trouble between the company's containerboard mill and the city wastewater treatment plant was detected.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics