Co-digestion of spent mushroom substrate and corn stover for methane production via solid-state anaerobic digestion

Abstract The effects of solid-state NaOH pretreatment on the efficiency of methane production from semi-dry anaerobic digestion of rose (Rosa rugosa) stalk were investigated at various NaOH loadings (0, 1, 2, and 4% (w/w)). Methane production, process stability and energy balance were analyzed. Results showed that solid-state NaOH pretreatment significantly improved biogas and methane yields of 30-day anaerobic digestion, with increases from 143.7 mL/g volatile solids (VS) added to 157.1 mL/g VS –192.1 mL/g VS added and from 81.8 mL/g VS added to 88.8 mL/g VS–117.7 mL/g VS added, respectively. Solid-state NaOH pretreatment resulted in anaerobic digestion with higher VS reduction and lower technical digestion time. The 4% NaOH-treated group had the highest methane yield of 117.7 mL/g VS added, which was 144% higher compared to the no NaOH-treated group, and the highest net energy recovery. Higher rate of lignocellulose breakage and higher process stability of anaerobic digestion facilitated methane production in the NaOH-pretreated groups.

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Reactor performance and microbial community dynamics during solid-state anaerobic digestion of corn stover at mesophilic and thermophilic conditions

Bioresource Technology ◽

10.1016/j.biortech.2013.02.073 ◽

2013 ◽

Vol 136 ◽

pp. 574-581 ◽

Cited By ~ 86

Author(s):

Jian Shi ◽

Zhongjiang Wang ◽

Jill A. Stiverson ◽

Zhongtang Yu ◽

Yebo Li

Keyword(s):

Microbial Community ◽

Anaerobic Digestion ◽

Solid State ◽

Corn Stover ◽

Community Dynamics ◽

Reactor Performance ◽

Microbial Community Dynamics ◽

Thermophilic Conditions

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Solid-State Anaerobic Digestion for Methane Production from Corn Stalks with Stack-Pretreated

Materials Science Forum ◽

10.4028/www.scientific.net/msf.697-698.326 ◽

2011 ◽

Vol 697-698 ◽

pp. 326-330 ◽

Cited By ~ 1

Author(s):

S.X. Zhou ◽

Y.P. Dong ◽

Y.L. Zhang

Keyword(s):

Anaerobic Digestion ◽

Solid State ◽

Methane Production ◽

Biogas Production ◽

Cow Dung ◽

Cow Manure ◽

Pretreatment Method ◽

Biogas Yield ◽

Microbial Pretreatment ◽

Microbial Strains

Microbial pretreatment was applied to enhance biogas production from corn stover through solid-state anaerobic digestion, but the price of microbial strains is high. The objective of this study was to find the effects on biogas production by the naturally microbial pretreatment method. The highest cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained in B group (the pretreated corn straws with cow dung), which was 19.6% higher than that of the untreated samples. The D group（the pretreated corn straws with the sludge）cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained, which was 18.87% higher than that of the untreted samples. The biogas of D group increased to the range of 55%～60% methane content, while B group with the range of 75%～80%.The results indicated that the pretreated corn straws mixing cow manure can improve both the biogas production yield and the content of methane in CH4。

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