Study of the Processes of Stepwise Tertiary Sedimentation of Treated Wastewater using Reagents
Yu. V. Vasilyeva, M. N. Dortseva
FSBEI HE «Donbas National Academy of Civil Engineering and Architecture»
Abstract: The possibility of using tertiary sedimentation with the use of reagents for the additional purification of biologically treated wastewater in airlift bioreactors from suspended solids and phosphorus compounds has been studied. The article presents the results of laboratory studies to determine the effectiveness of tertiary sedimentation of biologically treated wastewater in connection with the BOSEB technology (treatment with airlift bioreactors). In laboratory tests, classical reagents were used (coagulant, flocculant, lime). The experimental results showed that the greatest efficiency of tertiary purification from both suspended solids and phosphorus compounds was shown by a scheme with two-stage sedimentation and the introduction of an anionic flocculant at the first stage, and a coagulant at the second, with an increase in the residence time at the second stage to 40 minutes. Indirect confirmation of the hypothesis was obtained that activated sludge particles removed from the clarifier have a positive surface charge.
Keywords: tertiary sedimentation, phosphates, turbidity, coagulant, flocculant, activated sludge.
Pages: 103-108.
Link for citation: Vasilyeva, Yu. V.; Dortseva, M. N. Study of the Processes of Stepwise Tertiary Sedimentation of Treated Wastewater using Reagents. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2024. – Issue 2024-4(168) Scientific and technical achievements of students of the construction and architectural industry. – Р. 103-108. – URL: https://donnasa.ru/publish_house/journals/vestnik/2024/2024-4(168)/st_22_vasilyeva_dortseva.pdf (date of access: 15.10.2024). (in Russian)
Issue 2024-4 (168)Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture