E-resources
Peer reviewed
-
Jo, Yura; Park, Jungsu; Kim, Gi-Beom; Lee, Youngkyu; Kim, Sang-Hyoun
Journal of water process engineering, July 2024, 2024-07-00, Volume: 64Journal Article
High-rate activated sludge (HRAS) is wastewater treatment focusing on reducing greenhouse gas emissions via energy recovery from sludge. However, the effect of hydraulic retention time (HRT) on HRAS performance and redirection pathways has seldom been investigated. Also, the fractionation of extracellular polymeric substance (EPS) as loosely-bound (LB) and tightly-bound (TB) in HRAS sludge have not reported yet. This study aimed to comprehensively investigate the carbon redirection pathways and biogas recovery potential of the HRAS system, examining the separate effects of HRT and SRT. An HRT of 1.5 h and an SRT of 2 d, HRAS achieved the highest COD recovery, with 64.8 % removed and 60.5 % redirected as waste activated sludge (WAS) as the pseudo-steady average values. And WAS exhibited notably high LB-EPS, reaching 366.2 mg/g volatile suspended solids (VSS). Furthermore, the metabolism pathway for redirection resulted in biosorption 54.9 %, LB-EPS 34.0 %, TB-EPS 7.2 %, and cell growth 3.9 % based VSS. The biochemical methane potential of WAS was measured at 234.0 mL CH4/g COD, equivalent to 40.5 % of influent at HRT 1.5 h and SRT 2 d as optimal conditions. Notably, Family Carnobacteriaceae and Genus Trichococcus were emerged dominantly in HRAS. This study would be useful in the design and operation of HRAS for sustainable wastewater treatment and climate change mitigation. Display omitted •HRT 1.5 h and SRT 2 d showed the maximum pollution removal and biogas recovery.•64.8 % of influent COD was removed, of which 62.5 % were recovered as biogas.•Redirected sludge had high LB-EPS, which is related to the high biodegradability.•Carnobacteriaceae was dominant bacterial family in HRAS.
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.