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Title: Alkylethoxyglucoside-enhanced volatile fatty acids production from waste activated sludge: performance and mechanisms
Authors: Wu, Qinglian
Zheng, Heshan
Chen, Ying
Liu, Min
Bao, Xian
Guo, Wanqian
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Wu, Q., Zheng, H., Chen, Y., Liu, M., Bao, X. & Guo, W. (2021). Alkylethoxyglucoside-enhanced volatile fatty acids production from waste activated sludge: performance and mechanisms. Journal of Cleaner Production, 289, 125765-.
Journal: Journal of Cleaner Production
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.
ISSN: 0959-6526
DOI: 10.1016/j.jclepro.2020.125765
Schools: School of Civil and Environmental Engineering 
Rights: © 2020 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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