Optimization of anaerobic acidogenesis by adding Fe0 powder to enhance anaerobic wastewater treatment

Liu, Yiwen, Zhang, Yaobin, Quan, Xie, Li, Yang, Zhao, Zhiqiang, Meng, Xusheng and Chen, Shuo (2012) Optimization of anaerobic acidogenesis by adding Fe0 powder to enhance anaerobic wastewater treatment. Chemical Engineering Journal, 192 179-185. doi:10.1016/j.cej.2012.03.044


Author Liu, Yiwen
Zhang, Yaobin
Quan, Xie
Li, Yang
Zhao, Zhiqiang
Meng, Xusheng
Chen, Shuo
Title Optimization of anaerobic acidogenesis by adding Fe0 powder to enhance anaerobic wastewater treatment
Formatted title
Optimization of anaerobic acidogenesis by adding Fe0 powder to enhance anaerobic wastewater treatment
Journal name Chemical Engineering Journal   Check publisher's open access policy
ISSN 1385-8947
1873-3212
Publication date 2012-06-01
Sub-type Article (original research)
DOI 10.1016/j.cej.2012.03.044
Open Access Status Not Open Access
Volume 192
Start page 179
End page 185
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Acidogenesis is responsible to convert complex organics into volatile fatty acids (VFA), whose metabolic rate and production type have important effects on the whole anaerobic digestion. A novel strategy for enhancing anaerobic wastewater treatment via dosing Fe powder (40g) in an acidogenic reactor (2L) is described. The results showed that the hydrolysis/fermentation was accelerated by Fe dosing. As a result, the acidogenic performances in COD removal (45-56%) and VFA production (1170-1340mg/L) were less affected by shortened hydraulic retention time (HRT) from 6 to 2h. However, COD removal declined to 25% and VFA production decreased to 661mg/L in a reference reactor without Fe0 dosing (A2). Besides, Fe0 dosing optimized fermentation type, namely, the production of propionate was decreased, which was favorable for subsequent acetogenesis and methanogenesis. Fluorescence in situ hybridization (FISH) analysis indicated that Fe0 dosing increased the abundance of acidogens, especially acetogens. The methanogenic reactor fed with the effluent of A1 had higher COD removal and treatment stability with almost no propionate detected. These results suggested that the enhancement of acidification by Fe0 powder dosing was helpful to accelerate and improve anaerobic acidogenesis to create a favorable feeding condition for the subsequent treatment.
Keyword Acidogenesis
Anaerobic
Fe0
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Advanced Water Management Centre Publications
 
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