Enhancement of biogas production from rape straw using different co-pretreatment techniques and anaerobic co-digestion with cattle manure

Eid S Gaballah; Abd El-Fatah Abomohra; Chao Xu; Mahdy Elsayed; Tarek Kh Abdelkader; Jiacong Lin; Qiaoxia Yuan

doi:10.1016/j.biortech.2020.123311

Enhancement of biogas production from rape straw using different co-pretreatment techniques and anaerobic co-digestion with cattle manure

Bioresour Technol. 2020 Aug:309:123311. doi: 10.1016/j.biortech.2020.123311. Epub 2020 Apr 6.

Authors

Eid S Gaballah¹, Abd El-Fatah Abomohra², Chao Xu³, Mahdy Elsayed⁴, Tarek Kh Abdelkader¹, Jiacong Lin³, Qiaoxia Yuan⁵

Affiliations

¹ College of Engineering, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan 430070, PR China; Agricultural Engineering Department, Faculty of Agriculture, Fayoum University, 63514 Fayoum, Egypt.
² Department of Environmental Engineering, School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, PR China; Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt.
³ College of Engineering, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan 430070, PR China.
⁴ College of Engineering, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan 430070, PR China; Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza 12613, Egypt.
⁵ College of Engineering, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan 430070, PR China; Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River, Ministry of Agriculture and Rural Affairs, Wuhan 430070, PR China. Electronic address: [email protected].

PMID: 32289661
DOI: 10.1016/j.biortech.2020.123311

Abstract

The present study investigated the possibility of valorizing rape straw through anaerobic digestion and the possibility of improving biomethane yield by pretreatment with H₂SO₄, combined H₂SO₄ with steam explosion (SE) and SE combined with superfine grinding (SFG). To evaluate the pretreatment method efficiency, several analytical techniques were applied. Additionally, the performance of co-digesting of cattle manure (CM) with pretreated rape straw (PRS) at different ratios was evaluated. The results showed that combined pretreatment could dissolve the lignocellulosic fiber structure, which positively stimulated methane yield. The highest cumulative CH₄ yield (CMY) of 305.7 mLg^-1VS was achieved by combined SE at 180 °C for 5 min with SFG, which was 77.84% higher than the untreated. The CMY was further improved by 11.4-59% higher than the control (CM) using co-digestion. This study confirmed that, under optimal parameters of AD, pretreatment with SEG180 could significantly boost the CMY from co-digestion of CM and PRS.

Keywords: Co-digestion; Combined pretreatments; Methane production; Rape straw; Steam explosion; Sulfuric acid.

MeSH terms

Anaerobiosis
Animals
Biofuels*
Cattle
Manure*
Methane
Steam

Substances

Biofuels
Manure
Steam
Methane