title: Evaluation of hydrothermal treatment in enhancing rice straw compost stability and maturity.
abstract: In order to evaluate the hydrothermal treatment (HTT) in enhancing compost stability and maturity of lignocellulosic agricultural residues, a bin-scale (90 L) composting of rice straw with and without "HTT" was performed. The rice straw compost product with "HTT" after 6 weeks of composting can be considered stable and adequate for field application as expressed by pH of 8.4, "EC value" of 2.96 dS m(-1), C/N ratio of 12.5, microbial activity of <8.05 mg CO2 g(-1) OM d(-1), NH4(+)-N content of 93.75 mg kg(-1) DM and finally, by "GI" of >83%. However, compost may prove phytotoxic if used as growing media for EC sensitive plants. As for rice straw compost product without "HTT", the high microbial activity (>12.28 mg CO2 g(-1) OM d(-1)) even after 14 weeks of composting suggests that the residue has not stabilized yet and is far away from stability and maturity, although a higher GI (>100%) was observed.
authors.affiliation: Department of Environmental Science and Technology, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan. Electronic address: bakhtiyor_nr@yahoo.com.
authors.forename: Bakhtiyor
authors.initials: B
authors.lastname: Nakhshiniev
authors.forename: Muhammad Kunta
authors.initials: MK
authors.lastname: Biddinika
authors.forename: Hazel Bantolino
authors.initials: HB
authors.lastname: Gonzales
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Sumida
authors.forename: Kunio
authors.initials: K
authors.lastname: Yoshikawa
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis; D004553:Electric Conductivity; D018525:Germination; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D012275:Oryza / Q000737:chemistry*; D012987:Soil; D013696:Temperature; D014866:Waste Products / Q000032:analysis*; D014867:Water / Q000494:pharmacology*
chemical_list: D064751:Ammonium Compounds; D009566:Nitrates; D009930:Organic Chemicals; D012987:Soil; D014866:Waste Products; D014867:Water; D002245:Carbon Dioxide; D002244:Carbon; D009584:Nitrogen
keywords: Compost; Hydrothermal treatment; Rice straw; Stability and maturity