Biodegradability of degradable plastics exposed to anaerobic digested sludge and simulated landfill conditions |
| |
Authors: | Pyong Kyun Shin Myung Hee Kim Jong Min Kim |
| |
Institution: | (1) Environmental Research Center, Korea Institute of Science and Technology, Seoul, Korea |
| |
Abstract: | The biodegradabilities of various plastics by anaerobic digested sludge were measured and compared with the biodegradabilities
under simulated landfill conditions. Bacterial poly(3-hydroxy-butyrate-co-3-hydroxyvalerate) (PHB/HV; 92/8, w/w), a natural
aliphatic polyester, degraded nearly to completion within 20 days of cultivation by anaerobic digested sludge, while synthetic
aliphatic polyesters such as poly-lactic acid, poly(butylene succinate), and poly (butylene succinate-co-ethylene succinate)
did not degrade at all in 100 days. Cellophane, which was used as a control material, exhibited a similar degradation behavior
to PHB/HV. Under simulated landfill conditions, PHB/HV degraded quite well within 6 months. Synthetic aliphatic polyesters
also showed significant weight losses through 1 year of cultivation. The acidic environment inside simulators generated by
the degradation of biodegradable food wastes which comprised 34 % of municipal solid waste seems to cause the weight loss
of synthetic aliphatic polyesters. |
| |
Keywords: | Biodegradability plastics anaerobic digested sludge simulated landfill |
本文献已被 SpringerLink 等数据库收录! |
|