Anaerobic co-digestion of chicken manure and corn stover in batch and continuously stirred tank reactor (CSTR)

• Published in: Bioresource technology Vol. 156; pp. 342 - 347
• Main Authors: Li, Yeqing, Zhang, Ruihong, He, Yanfeng, Zhang, Chenyu, Liu, Xiaoying, Chen, Chang, Liu, Guangqing
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.03.2014; Elsevier
• Subjects: Agronomy. Soil science and plant productions; anaerobic digestion; Anaerobiosis; Animals; Batch Cell Culture Techniques - instrumentation; Batch Cell Culture Techniques - methods; Biofuel production; Biofuels; biogas; Biogas digestate; Biological and medical sciences; Biological treatment of sewage sludges and wastes; Bioreactors; Biotechnology; carbon nitrogen ratio; Chicken manure; Chickens; Co-digestion; Continuously stirred tank reactors; Corn; Corn stover; Energy; Environment and pollution; Feeding; Food industries; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Industrial applications and implications. Economical aspects; Manure; Manure - analysis; Methane; Methane - metabolism; poultry manure; Pyrolysis; Residues; Temperature; Thermogravimetry; total solids; Use and upgrading of agricultural and food by-products. Biotechnology; Use of agricultural and forest wastes. Biomass use, bioconversion; Waste Products - analysis; Zea mays - chemistry; TAN; Corn stover; S/I ratio; HRT; Biogas digestate; VFA; OLR; C/N ratio; Pyrolysis; AD; Chicken manure; BMP; CM; DSFD; TA; Co-digestion; TGA; CS; CSTR; EY; DTG; VMP; HCV; VS; LCV; TS; Monocotyledones; Zea mays; Poultry manure; Biogas; Continuous stirred tank reactor; Cereal crop; Anaerobic digestion; Straw; Gramineae; Angiospermae; Spermatophyta; Corn by product
• ISSN: 0960-8524; 1873-2976; 1873-2976
• DOI: 10.1016/j.biortech.2014.01.054

•Co-digestion of CM and CS were investigated under batch and continuous conditions.•CSTR showed stable methane yield of 223±7mL/gVSadded at OLR of 4gVS/L/d.•Post-digestion of digestate gave extra energy yield up to 2.6MJ/kgVSadded.•Pyrolysis of digestate could produce valuable pyrolysis gas with LCV of 10.9MJ/m3. Anaerobic co-digestion of chicken manure and corn stover in batch and CSTR were investigated. The batch co-digestion tests were performed at an initial volatile solid (VS) concentration of 3gVS/L, carbon-to-nitrogen (C/N) ratio of 20, and retention time of 30d. The methane yield was determined to be 281±12mL/gVSadded. Continuous reactor was carried out with feeding concentration of 12% total solids and C/N ratio of 20 at organic loading rates (OLRs) of 1–4gVS/L/d. Results showed that at OLR of 4gVS/L/d, stable and preferable methane yield of 223±7mL/gVSadded was found, which was equal to energy yield (EY) of 8.0±0.3MJ/kgVSadded. Post-digestion of digestate gave extra EY of 1.5–2.6MJ/kgVSadded. Pyrolysis of digestate provided additional EY of 6.1MJ/kgVSadded. Pyrolysis can be a promising technique to reduce biogas residues and to produce valuable gas products simultaneously.