title: Anaerobic digestion of saline creeping wild ryegrass for biogas production and pretreatment of particleboard material.
abstract: The objective of this research was to develop an integrated process to produce biogas and high-quality particleboard using saline creeping wild ryegrass (CWR), Leymus triticoides through anaerobic digestion (AD). Besides producing biogas, AD also serves as a pretreatment method to remove the wax layer of CWR for improving binding capability and then the residue is used to produce high-quality particleboard. CWR was digested for three time periods, 15, 22, and 33 days with the volatile solid (VS) loading of 10 g-VS/L-sludge and the food to microorganism (F/M) ratio of 1.41. The highest biogas yield after digestion for 33 days was 251 mL/g-VS, which is corresponded to energy of 8419BTU/kg-dry CWR. The highest methane content of biogas was 63%. Compared with particleboards manufactured from urea formaldehyde (UF) and untreated CWR, the mechanical and long-term (24 h) water resistance properties of particleboards made from UF and 33-day AD CWR residue were statistically significantly improved, except for modulus of elasticity (MOE). For example, the modulus of rupture (MOR) was increased by 39%. The results indicated that the integrated process could be a cost-effective and environmentally friendly method for producing bioenergy and particleboard with agricultural residues.
authors.affiliation: Biological and Agricultural Engineering Department, University of California, One Shields Avenue, Davis, CA 95616, USA. yizheng@ucdavis.edu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
authors.forename: Zhongli
authors.initials: Z
authors.lastname: Pan
authors.forename: Ruihong
authors.initials: R
authors.lastname: Zhang
authors.forename: Hamed M
authors.initials: HM
authors.lastname: El-Mashad
authors.forename: Jinming
authors.initials: J
authors.lastname: Pan
authors.forename: Bryan M
authors.initials: BM
authors.lastname: Jenkins
mesh_terms: D000693:Anaerobiosis; D001674:Bioelectric Energy Sources; D006863:Hydrogen-Ion Concentration; D008129:Lolium / Q000378:metabolism*; D055595:Mechanical Phenomena; D008697:Methane / Q000032:analysis; D010209:Paper; D054712:Salinity; D012722:Sewage; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D012722:Sewage; D014867:Water; D008697:Methane