Article Ultrasound-controlled acidogenic valorization of wastewater for biohydrogen and volatile fatty acids production: Microbial community profiling

被引：14

作者：

Sarkar, Omprakash ^{[1
]}

Matsakas, Leonidas ^{[1
]}

Rova, Ulrika ^{[1
]}

Christakopoulos, Paul ^{[1
]}

机构：

[1] Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, Div Chem Engn, Biochem Proc Engn, S-97187 Lulea, Sweden

来源：

ISCIENCE | 2023年 / 26卷 / 04期

基金：

瑞典研究理事会;

关键词：

FERMENTATIVE HYDROGEN-PRODUCTION; LOW-STRENGTH ULTRASONICATION; METHANOGENIC GRANULES; PRETREATMENT METHODS; POSITIVELY AFFECTS; FOOD WASTE; ENHANCEMENT; EXTRAPOLATION; RAREFACTION; PERFORMANCE;

D O I：

10.1016/j.isci.2023.106519

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The present study explored the influence of ultrasound on acidogenic fermenta-tion of wastewater for the production of biohydrogen and volatile fatty acids/ carboxylic acids. Eight sono-bioreactors underwent ultrasound (20 kHz: 2W and 4W), with an ultrasound duration ranging from 15 min to 30 days, and the forma-tion of acidogenic metabolites. Long-term continuous ultrasonication enhanced biohydrogen and volatile fatty acid production. Specifically, ultrasonication at 4W for 30 days increased biohydrogen production by 3.05-fold compared to the control, corresponding to hydrogen conversion efficiency of 58.4%; enhanced volatile fatty acid production by 2.49-fold; and increased acidification to 76.43%. The observed effect of ultrasound was linked to enrichment with hydrogen-producing acidogens such as Firmicutes, whose proportion increased from 61.9% (control) to 86.22% (4W, 30 days) and 97.53% (2W, 30 days), as well as inhibition of methanogens. This result demonstrates the positive effect of ultrasound on the acidogenic conversion of wastewater to biohydrogen and volatile fatty acid production.

引用

页数：18

共 60 条

[1] Ultrasound-controllable engineered bacteria for cancer immunotherapy [J].