Synergistic Effects of Anaerobic Co-Digestion of Pretreated Corn Stover with Chicken Manure and Its Kinetics
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Synergistic Effects of Anaerobic Co-Digestion of Pretreated Corn Stover with Chicken Manure and Its Kinetics Qiong Yu 1,2 & Shaofeng Cui 1,2 & Chen Sun 3 & Ronghou Liu 1,2 & Manobendro Sarker 1,2 & Zhijian Guo 1 & Ruiyin Lai 1 Received: 24 June 2020 / Accepted: 29 September 2020/ # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract
The pretreatment effects and synergistic effects of anaerobic co-digestion of pretreated corn stover (CS) with chicken manure (CM) were studied. Results showed that the NaOH-H2O2 pretreatment effect on CS was better than urea pretreatment in terms of anaerobic digestion promotion. The highest cumulative methane yield of 332.7 mL/g VS added was obtained from the CS (NaOH-H2O2 pretreated)/CM ratio of 1:3, and the highest cumulative methane yield of 319.7 mL/g VS added was obtained from the CS (urea pretreated)/CM ratio of 1:2. Synergistic effects were found in CS (NaOH-H2O2 pretreated)/CM ratios of 2:1, 1:2, 1:3 and CS (urea pretreated)/CM ratios of 1:1, 1:2. Synergistic effect was not found at CS (unpretreated)/CM ratios of 1:2 and 1:3. Pretreatment of CS can produce synergistic effect on anaerobic co-digestion and increase cumulative methane yield by 6.54–24.65%. Among the four kinetic models, modified Gompertz model was best fitted in describing the methane production during anaerobic co-digestion (R2 = 0.9845–0.9988). Keywords Anaerobic co-digestion . Chicken manure . Corn stover . Synergistic effects . Kinetics
* Chen Sun [email protected] * Ronghou Liu [email protected]
1
Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
2
Key Laboratory of Urban Agriculture (South), Ministry of Agriculture and Rural Affairs, 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
3
College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001 Zhejiang Province, People’s Republic of China
Applied Biochemistry and Biotechnology
Introduction Along with the increase of energy demand, the continuous depletion of fossil fuel resources and the climate change caused by greenhouse gas emission, renewable energy production technology is growing rapidly [19]. Producing biogas from anaerobic digestion (AD) is one of the renewable energy technologies and has attracted significant attention worldwide [3]. In recent years, a series of policies, laws, and plans conducive to the development of biogas technology were formulated in the world. At present, because of their good biogas potentials, livestock and poultry manure and agricultural crop straw have become preferred main feedstock that are widely used for biogas production [33]. Actually, there are large amount of chicken manure (CM) and corn stover (CS) produced annually around the world, with production of about 300 and 400 million ton per year in China, respectively [9]. They are typical organic solid wastes. For a long time, the utilization rate of agricultural
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