deactivation of the activated sludge as a result of mechanical disintegration

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ID: 178476
2017
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Abstract
The aim of the study was to analyse the impact of hydrodynamic disintegra-tion of thickened excess activated sludge, performed at different levels of energy density (70, 140, 210 280 and 350 kJ/l), on the respiratory activity of microorganisms. For this purpose the oxygen uptake rate test (OUR) was used. The experiment also included determination of the sludge disintegra-tion degree (DD). Studies have shown, that the value of the energy density and sludge disintegration degree affected the respiratory activity of micro-organisms. With a relatively low DD, below approx. 9 % (corresponding to an energy density of approx. 140 kJ/l), increase of microbial activity was observed (6,2 − 30,2 %), as compared with untreated sludge. However, above this value of DD, inactivation of microorganisms occurred. Deactiva-tion of microorganisms higher than 85 % was observed when the sludge disintegration degree was greater than approx. 24 % (corresponding to an energy density of approx. 210 kJ/l).
Reference Key
walczak2017inynieriadeactivation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Justyna Walczak;Monika Żubrowska-Sudoł;Agnieszka Garlicka
Journal BMC medical education
Year 2017
DOI
10.12912/23920629/70266
URL
http://www.journalssystem.com/ie/DEZAKTYWACJA-OSADU-CZYNNEGO-W-WYNIKU-PROCESU-MECHANICZNEJ-DEZINTEGRACJI,70266,0,2.html
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