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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/TJ01000138" target="_blank" >TJ01000138: Zlepšování kvality stabilizovaných kalů metodou postaerace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Water Science and Technology

ISSN

0273-1223

e-ISSN

—

Svazek periodika

80

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1633-1642

Kód UT WoS článku

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EID výsledku v databázi Scopus

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