| Title |
Alkylethoxyglucoside-enhanced volatile fatty acids production from waste activated sludge: Performance and mechanisms |
| ID_Doc |
19449 |
| Authors |
Wu, QL; Zheng, HS; Chen, Y; Liu, M; Bao, X; Guo, WQ |
| Title |
Alkylethoxyglucoside-enhanced volatile fatty acids production from waste activated sludge: Performance and mechanisms |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.jclepro.2020.125765 |
| Abstract |
The green and low-cost surfactant Alkylethoxyglucoside (AEG) was used to enhance VFAs production from waste activated sludge (WAS). VFAs production (436.27 +/- 14.88 mg COD/g VSS) was improved by-6.15 times than the blank under the optimal dosage 0.4 g/g TSS, exceeding most of current enhancement strategies. Thereinto, AEG degradation contributed to-15% of total VFAs production, and its primary degradation rate approached 100% on the eighth day. Mechanism investigation revealed that AEG promoted the WAS disintegration and enzyme-substrate interaction by reducing the surface charge to weaken the repulsive force, so that hydrolysis and acidification extents were improved by 35% and 18%, respectively. However, methanation was suppressed by AEG itself and the reduced pH. Additionally, the functional microorganisms responsible for substrates hydrolysis and VFAs generation were much more enriched after adding AEG. From a performance, economic and environmental perspective, AEG has a great application potential on enhancing VFAs production. (c) 2020 Elsevier Ltd. All rights reserved. |
| Author Keywords |
Waste activated sludge; Anaerobic fermentation; Volatile fatty acids; Surfactant; Alkylethoxyglucoside (AEG) |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000620272500013 |
| WoS Category |
Green & Sustainable Science & Technology; Engineering, Environmental; Environmental Sciences |
| Research Area |
Science & Technology - Other Topics; Engineering; Environmental Sciences & Ecology |
| PDF |
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