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Waste and Biomass Valorization

, Volume 7, Issue 2, pp 325–330 | Cite as

Characterization and Thermophilic Anaerobic Digestion of Organic Fraction of Municipal Solid Waste

  • Yeqing LiEmail author
  • Hong Liu
  • Dongfang Su
  • Fang Yan
Original Paper

Abstract

Purpose

To investigate the characteristics, pretreatment effects and methane production potential of organic fraction of municipal solid waste (OFMSW), machine-separated OFMSW (MS-OFMSW) and machine-with floating-separated OFMSW (MFS-OFMSW) were digested under batch thermophilic anaerobic digestion conditions in this assay.

Methods

The MS-OFMSW and MFS-OFMSW samples were digested in four 1 L batch digesters at initial volatile solids (VS) loadings of 3 g VS/L, each in duplicate, and at a thermophilic temperature (50 ± 2 °C). The effective volume of each digester was 0.5 L and the corresponding substrate to inoculum (S/I) ratio was 0.5. The digestion time for biochemical methane potential test was 30 days.

Results

Results showed that 76.5 % of OFMSW was made up of papers and small organics. The volatile solids to total solids (VS/TS) ratios of MS-OFMSW and MFS-OFMSW were approximately 50 and 80 %, respectively. The C/N ratios for MS-OFMSW and MFS-OFMSW were found to be 18.3 and 15.5, respectively. For biogas and methane yields, on the basis of VS, there were no significant differences (p > 0.05) between MS-OFMSW and MFS-OFMSW, respectively. However, on a TS basis, the biogas and methane yields of MFS-OFMSW were 534.8 and 325.9 mL/g TS, respectively, which were 49.8 and 48.3 % higher than those of MS-OFMSW.

Conclusion

Mechanical separation combined with floating separation could be an efficient way to increase the biodegradability of OFMSW.

Keywords

Organic fraction of municipal solid waste (OFMSW) Machine and floating pretreatment Thermophilic anaerobic digestion Biochemical methane potential (BMP) 

Abbreviations

AD

Anaerobic digestion

BMP

Biochemical methane potential

EBY

Experimental biogas yield

EMY

Experimental methane yield

HRT

Hydraulic retention time

OFMSW

Organic fraction of municipal solid waste

MFS-OFMSW

Machine- and floating-separated OFMSW

MS-OFMSW

Machine-separated OFMSW

NA

Not available

ND

Not determined

SMA

Specific methanogenic activity

SD

Standard deviation

TS

Total solids

VS

Volatile solids

Notes

Acknowledgments

This work was partly supported by Science Foundation of China University of Petroleum, Beijing (No. 2462014YJRC034). The authors also acknowledge financial support from China Scholarship Council. We appreciate assistance provided by Ruihong Zhang, Steve Zicari, Natthiporn Aramrueang, Asato Caitlin, Mianfeng Zhang, and Xiaoying Liu, Department of Biological and Agricultural Engineering, University of California, Davis, USA.

Supplementary material

12649_2015_9444_MOESM1_ESM.docx (148 kb)
Supplementary material 1 (DOCX 148 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Institute of New Energy, State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum (Beijing)BeijingPeople’s Republic of China

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