Influence of liquid- and solid-state coupling anaerobic digestion process on methane production of cow manure and rice straw

Influence of liquid- and solid-state coupling anaerobic digestion process on methane production... Based on the different characteristics of cow manure and rice straw, liquid- and solid-state coupling anaerobic digestion (L-SS-AD) is designed in this study. In detail, cow dung was fermented in liquid anaerobic digestion (L-AD) process, while rice straw was treated in SS-AD process with L-AD digestate as inoculums to get the benefit of both the process. Opti- mization experiments were systematically performed in both two processes. The results showed that organic loading rate (OLR) of 10.0 kg VS/(m  d) was possible during the L-AD process, and the average specific methane production (SMP) 0 0 was 225.2 mL CH /g VS at a steady state. In addition, in batch test of SS-AD, the lower substrate-to-inoculum ratios (S /I ) 0 0 favored the reaction rate and the optimal S /I of 0.9 was selected for further leach-bed experiment. Furthermore, a leach-bed reactor for SS-AD process was operated stably at the average OLR of 2.17 kg VS/m  d with the feed interval of 2 weeks. The maximum SMP was 216.13 mL CH /g VS. Finally, the total energy yield values of 15.45 kJ/g VS can be obtained from the integrated process. L-SS-AD process can improve the efficiency of methane production and provide data preference for full-scale industrial biogas project. Keywords Liquid- http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Material Cycles and Waste Management Springer Journals

Influence of liquid- and solid-state coupling anaerobic digestion process on methane production of cow manure and rice straw

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Publisher
Springer Japan
Copyright
Copyright © 2018 by Springer Japan KK, part of Springer Nature
Subject
Engineering; Civil Engineering; Waste Management/Waste Technology; Environmental Management
ISSN
1438-4957
eISSN
1611-8227
D.O.I.
10.1007/s10163-018-0750-5
Publisher site
See Article on Publisher Site

Abstract

Based on the different characteristics of cow manure and rice straw, liquid- and solid-state coupling anaerobic digestion (L-SS-AD) is designed in this study. In detail, cow dung was fermented in liquid anaerobic digestion (L-AD) process, while rice straw was treated in SS-AD process with L-AD digestate as inoculums to get the benefit of both the process. Opti- mization experiments were systematically performed in both two processes. The results showed that organic loading rate (OLR) of 10.0 kg VS/(m  d) was possible during the L-AD process, and the average specific methane production (SMP) 0 0 was 225.2 mL CH /g VS at a steady state. In addition, in batch test of SS-AD, the lower substrate-to-inoculum ratios (S /I ) 0 0 favored the reaction rate and the optimal S /I of 0.9 was selected for further leach-bed experiment. Furthermore, a leach-bed reactor for SS-AD process was operated stably at the average OLR of 2.17 kg VS/m  d with the feed interval of 2 weeks. The maximum SMP was 216.13 mL CH /g VS. Finally, the total energy yield values of 15.45 kJ/g VS can be obtained from the integrated process. L-SS-AD process can improve the efficiency of methane production and provide data preference for full-scale industrial biogas project. Keywords Liquid-

Journal

Journal of Material Cycles and Waste ManagementSpringer Journals

Published: May 28, 2018

References

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