title: Semi-continuous anaerobic co-digestion of dairy manure with three crop residues for biogas production.
abstract: The characteristics of anaerobic semi-continuous co-digestion of dairy manure (DM) with three crop straw residues (SRs), rice straw, corn stalks and wheat straw under five mass mixing ratios (SRs/DM) were investigated. During the anaerobic digestion (AD) process, four periods were identified: startup, first stage of stabilization, second stage of stabilization, and suppression. Following the four periods, the biogas production rate varied between 101 and 576mL L(-1)d(-1). A high CH4 content and volatile solid reduction was maintained at the SRs/DM mass mixing ratio 1:9. The highest cumulative biogas production of more than 19L was obtained at ratio 5:5. However, ratio 9:1 performed worst in the whole process. Systematic analysis of the elements revealed nitrogen, phosphorus, and trace elements contents were important for the AD. Overall, the semi-continuous AD is efficient within a wide range of SRs/DM mass mixing ratios.
authors: Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China.
authors: Jiang
authors: J
authors: Li
authors: Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China.
authors: Luoyu
authors: L
authors: Wei
authors: Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China.
authors: Qiwu
authors: Q
authors: Duan
authors: Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China.
authors: Guoquan
authors: G
authors: Hu
authors: Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China. Electronic address: biomagongcheng2013@hotmail.com.
authors: Guozhi
authors: G
authors: Zhang
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002417:Cattle; D018556:Crops, Agricultural / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis*; D008697:Methane / Q000378:metabolism; D012275:Oryza / Q000737:chemistry; D025341:Principal Component Analysis; D014908:Triticum / Q000737:chemistry; D014866:Waste Products; D003313:Zea mays / Q000737:chemistry
chemical_list: D056804:Biofuels; D008372:Manure; D014866:Waste Products; D008697:Methane
keywords: Biogas; Crop straw residue; Dairy manure; Mass mixing ratio; Semi-continuous anaerobic co-digestion