| 摘要 |
PURPOSE:To provide an economical industrial process for decomposing a polyolefin polymer compound which causes substantial social problem for its disposal by treating a polyolefin polymer compound with wood-decaying basidiomycete, its cultured product, treated material, etc. CONSTITUTION:A polyolefin polymer compound (e.g. polyethylene film) is made to contact with wood-decaying basidiomycete (e.g. Phanerochaete chrysosporium ATCC 34541), its cultured product and/or treated product under a cultivation condition having restricted nitrogen and/or carbon contents and subjected to static culture at 20-28 deg.C for 20 days. The GPC analysis of the molecular weight of the treated polyolefin polymer compound revealed the lowering of the weight- average molecular weight from 125,000 to 10,300. Accordingly, the present process is effective in decomposing a polyolefin polymer compound in high efficiency without causing secondary pollution and is useful for the treatment of plastic wastes causing substantial social problems. |
