Simple improvement of digested sludge quality: is post-aeration the key?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F19%3A43919444" target="_blank" >RIV/60461373:22320/19:43919444 - isvavai.cz</a>
Result on the web
<a href="https://iwaponline.com/wst/article-abstract/80/9/1633/71318/Simple-improvement-of-digested-sludge-quality-is?redirectedFrom=fulltext" target="_blank" >https://iwaponline.com/wst/article-abstract/80/9/1633/71318/Simple-improvement-of-digested-sludge-quality-is?redirectedFrom=fulltext</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2166/wst.2019.409" target="_blank" >10.2166/wst.2019.409</a>

Result language
angličtina
Original language name
Simple improvement of digested sludge quality: is post-aeration the key?
Original language description
Postaeration, where digested sludge is introduced into aerobic conditions, is a technology that could improve the quality of sludge and sludge liquor in many ways. Although it is a fairly simple process, only few data about the effect of postaeration have been published. In this study, batch experiments have been performed first, indicating that postaeration affects the total ammonia nitrogen (TAN) and sludge dewaterability. At the removal of TAN both stripping and biological oxidation can play an important role depending on specific condition. Then the postaeration was investigated in a semicontinuous batch reactor. In addition, the effect of postaeration on the concentration of selected micropollutants such as pharmaceuticals, EOX and AOX was studied. The hydraulic retention time (HRT) of 8, 6, 4 and 2 days and different aeration intensities were tested. TAN removal efficiency achieved was about 40–60%, sludge dewaterability expressed by sludge cake total solids (TS) concentration after dewatering improved relatively by 5–30%. In addition, also TS degradation is taking place and therefore the reduction of final sludge amount to be disposed could be even higher. The biggest changes of observed parameters were recorded at the longest HRT.
Czech name
—
Czech description
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Project
<a href="/en/project/TJ01000138" target="_blank" >TJ01000138: Improvement of the quality of stabilized sludge by the postaeration</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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