Next Article in Journal
Propylene Polymerization Catalyzed by Metallocene/Methylaluminoxane Systems on Rice Husk Ash
Next Article in Special Issue
Enhanced Enzymatic Hydrolysis of Pennisetum alopecuroides by Dilute Acid, Alkaline and Ferric Chloride Pretreatments
Previous Article in Journal
Discovery and Computational Analyses of Novel Small Molecule Zika Virus Inhibitors
Previous Article in Special Issue
The Effect of the Chemical Character of Ionic Liquids on Biomass Pre-Treatment and Posterior Enzymatic Hydrolysis
Article Menu
Issue 8 (April-2) cover image

Export Article

Open AccessArticle

Comparison of Two Process Schemes Combining Hydrothermal Treatment and Acidogenic Fermentation of Source-Separated Organics

1
Department of Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada
2
Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
3
Greenfield Global, 275 Bloomfield Road, Chatham, ON N7M 0N6, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Ivet Ferrer
Molecules 2019, 24(8), 1466; https://doi.org/10.3390/molecules24081466
Received: 14 March 2019 / Revised: 5 April 2019 / Accepted: 6 April 2019 / Published: 13 April 2019
(This article belongs to the Special Issue Efficient Technology for the Pretreatment of Biomass II)
  |  
PDF [1563 KB, uploaded 13 April 2019]
  |  

Abstract

This study compares the effects of pre- and post-hydrothermal treatment of source- separated organics (SSO) on solubilization of particulate organics and acidogenic fermentation for volatile fatty acids (VFAs) production. The overall COD solubilization and solids removal efficiencies from both schemes were comparable. However, the pre-hydrolysis of SSO followed by acidogenic fermentation resulted in a relatively higher VFA yield of 433 mg/g VSS, which was 18% higher than that of a process scheme with a post-hydrolysis of dewatered solids from the fermentation process. Regarding the composition of VFA, the dominance of acetate and butyrate was comparable in both process schemes, while propionate concentration considerably increased in the process with pre-hydrolysis of SSO. The microbial community results showed that the relative abundance of Firmicutes increased substantially in the fermentation of pretreated SSO, indicating that there might be different metabolic pathways for production of VFAs in fermentation process operated with pre-treated SSO. The possible reason might be that the abundance of soluble organic matters due to pre-hydrolysis might stimulate the growth of more kinetically efficient fermentative bacteria as indicated by the increase in Firmicutes percentage. View Full-Text
Keywords: acidogenic fermentation; hydrothermal treatment; source separated organics; volatile fatty acids; particulate organics solubilization; microbial community analysis acidogenic fermentation; hydrothermal treatment; source separated organics; volatile fatty acids; particulate organics solubilization; microbial community analysis
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Lin, L.; Hosseini Koupaie, E.; Azizi, A.; Bazyar Lakeh, A.A.; Dhar, B.R.; Hafez, H.; Elbeshbishy, E. Comparison of Two Process Schemes Combining Hydrothermal Treatment and Acidogenic Fermentation of Source-Separated Organics. Molecules 2019, 24, 1466.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top