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THE BIOLOGICAL PROCESS OF DOMESTIC WATER

Lucica Balint

First published: 2018-06-20https://doi.org/10.5593/sgem2018/5.1/s20.114View metrics

Abstract

Biological domestic water treatment is an important and integral step of wastewater treatment system and it treats wastewater coming from either residential buildings or industries. This process is used to remove any contaminants that left over after primary treatment. The biological process of domestic water treatment presented in this paper consisted in the activation of the suspended microorganisms, which consisted of two distinct operations: a) aeration, where the microorganisms are mixed with nutrients from domestic water, where oxygen is injected; b) sedimentation by separation of biomass and other solids in suspension. The result of the decomposition of organic molecules allows the maintenance of existing biomass and the creation of a new biomass from the reproduction of microorganisms. Experimental research was performed on influent and effluent samples and the following parameters were measured: pH, temperature, dissolved oxygen and alcalinity. The analysis period was 50 days. The pH was over 6.7, otherwise a reduction in the nitrification activity occurred. At temperatures over 45 В°C and below 5 В°C nitrification has not occurred. By using this method, the organic substances removed from the effluent were over 80%.

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Publication details

Title
THE BIOLOGICAL PROCESS OF DOMESTIC WATER
Authors
Lucica Balint
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation
Publisher
STEF92 Technology
Year
2018
Pages
885-892
SWS Citekey
Balint201820885892
ISSN
1314-2704
ISBN
978-619-7408-46-1
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
domestic water treatmentnutrientsbiomassnitrification
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