Biological wastewater treatment

Research output: Chapter in Book/Report/Conference proceedingChapter


Over the last few decades, more and more wastewater treatment plants have been built all over the world. Today, several problems that occur in the course of water and wastewater treatment processes requires the active participation of hydro-biologists, microbiologists, applied ecologists and chemists; their knowledge and work may be crucial in numerous cases. In the field of water management and environmental protection, the solution of treatment of water and wastewater as well as the improvement of purification efficiency have become the central questions. The characterization of a particular water and wastewater depends on its physical, chemical and (micro)biological constituents. Water pollution comprises every external impact which modifies the quality of waters in such a way that it is suitability for ensuring the natural aquatic processes and ability for human use decreases or stops. Usually water pollution is not a natural environmental process. Pollutants and contaminants from wastewater are removed by physical, chemical and biological methods. Physical methods include sedimentation (settling), filtration and floatation. Chemical methods of wastewater treatment include neutralization and aeration/oxidation. Biological methods of waste treatment constitute the most common and widely used methods because they are the most economical means of accomplishing an acceptable final effluent. Biological wastewater treatment can be functioned by aerobic processes; these include the homogeneous reactor and fixed contact biofilm, and the anaerobic reactor during the function methane-gas. In this chapter, we deal with aerobic treatment, which is the activated sludge method as well as the anaerobic process. Activated sludge is the most widely used method to bring about stabilization in wastewater with organic matter constituents. Monitoring possibilities of function are analyzed in this sludge system. At the end of the chapter, a short outline is given about plans in the future concerning a connection with biological wastewater treatment.

Original languageEnglish
Title of host publicationWastewater and Water Contamination
Subtitle of host publicationSources, Assessment and Remediation
PublisherNova Science Publishers, Inc.
Number of pages24
ISBN (Electronic)9781536135800
ISBN (Print)9781536135794
Publication statusPublished - Jan 1 2018


ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Science(all)

Cite this

Lakatos, G. (2018). Biological wastewater treatment. In Wastewater and Water Contamination: Sources, Assessment and Remediation (pp. 105-128). Nova Science Publishers, Inc..