王峰^1,
1.南方科技大学工程技术创新中心北京,北京 100083

Polylactide biodegradation under thermophilic and hyperthermophilic anaerobic digestion condition

WANG Feng^1,
1.Engineering Innovation CenterBeijing, South University of Science and Technology of China, Beijing 100083, China

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摘要:用批次实验研究了聚乳酸塑料在厌氧消化条件下的降解特性。结果表明,提高处理温度和氨氮浓度可以显著促进聚乳酸分解为乳酸。当聚乳酸作为唯一的基质时,其转化为甲烷的速度缓慢,60 d后甲烷转化率为11.7%。将聚乳酸与餐厨垃圾混合消化则可以促进聚乳酸转化,60 d后的转化率为49.8%。如果将聚乳酸在80 ℃条件下预处理,然后再进行厌氧消化,则22 d后的转化率为81.8%。混合消化和超高温预处理都可以改善聚乳酸的可降解性,其中超高温预处理的促进效果尤为明显。
关键词: 聚乳酸/
高温/
超高温/
厌氧消化

Abstract:The biodegradation of polylactide (PLA) under anaerobic digestion condition was evaluated by batch experiments. It was found that increasing temperature and ammonia concentration can promote the transformation of PLA to lactic acid. When the PLA was treated under thermophilic (55 ℃) anaerobic digestion, it was difficult for it to be converted to methane gas. After 60 days treatment, the net methane conversion ratio of the PLA was only 11.7%. Co-digestion of the PLA and kitchen garbage (KG) promoted the biodegradation of the PLA, which reached a methane conversion ratio of 49.8% after 60 days treatment. With hyperthermophilic (80 ℃) pretreatment, the biodegradation of PLA was promoted greatly, and the net methane conversion ratio of the PLA was 81.8% after 22 days in the following thermophilic anaerobic digestion.
Key words:polylactide/
thermophilic/
hyperthermophilic/
anaerobic digestion.

[1]	KIM H, HAN S, SHIN H.The optimisation of food waste addition as a co-substrate in anaerobic digestion of sewage sludge[J].Waste Management,2003,21:515-526
[2]	HONG F, TSUNO H, HIDAKA T, et al.Study on applicability and operation factor of thermophilic methane fermentation to garbage treatment in high concentration under once-a-day feeding condition[J].Environmental Engineering Research,2003,40:333-342
[3]	SCHERER P, VOLLMER G, FAKHOURI T, et al.Development of a methanogenic hyperthermophilic conditions[J].Water Science & Technology,2000,4(3):83-91
[4]	LEE M, HIDAKA T, TSUNO H.Effect of temperature on performance and microbial diversity in hyperthermophilic digester system fed with kitchen garbage[J].Bioresource Technology,2008,99(15):6852-6860
[5]	LEE M, HIDAKA T, HAGIWARA W, et al.Comparative performance and microbial diversity of hyperthermophilic and thermophilic co-digestion of kitchen garbage and excess sludge[J].Bioresource Technology,2009,0(2):578-585
[6]	董蕾,占美丽,孙英杰,等.餐厨垃圾高温厌氧消化[J].环境工程学报,2013,7(6):2355-2360
[7]	马磊,王德汉,谢锡龙,等.餐厨垃圾的高温厌氧消化处理研究[J].环境工程学报,2009,3(8):1509-1512
[8]	吴静,王广启,曹知平,等.“热水解-高温厌氧消化”工艺处理高含固率剩余污泥的中试研究[J].环境科学,2014,35(9):3461-3465
[9]	HO K, POMETTO A.Temperature effects on soil mineralization of polylactic acid plastic in laboratory respirometers[J].Journal of Polymer and the Environment,1999,7(2):101-108
[10]	ONYARI J, MULAA F, MUIA J, et al.Biodegradability of poly (lactic acid), preparation and characterization of PLA/gum arabic blends[J].Journal of Polymer and the Environment,2008,16(3):205-212
[11]	COPINET A, BERTRAND C, GOVINDIN S, et al.Effects of ultraviolet light (315 nm), temperature and relative humidity on the degradation of polylactic acid plastic films[J].Chemosphere,2004,55(5):763-773
[12]	DUNNE M, CORRIGAN O I, RAMTOOLA Z.Influence of particle size and dissolution conditions on the degradation properties of polylactide-co-glycolide particles[J].Biomaterials,2000,21(16):1659-1668
[13]	ZENDA K, FUNAZUKURI T.Depolymerization of poly (ethylene terephthalate) in dilute aqueous ammonia solution under hydrothermal conditions[J].Journal of Chemical Technology & Biotechnology,2008,83(10):1391-1396
[14]	ARAI R, ZENDA K, HATAKEYAMA K.Reaction kinetics of hydrothermal depolymerization of poly (ethylene naphthalate), poly (ethylene terephthalate), and polycarbonate with aqueous ammonia solution[J].Chemical Engineering Science,2010,65(1):36-41
[15]	MORMANN W, SPITZER D.Fractionation and ammonolyticdegradation of poly (hexamethylene carbonate) in (supercritical) ammonia[J].E-Polymers,2004,4(1):81-92
[16]	PARK Y, HONG F, HIDAKA T, et al.Comparison of thermophilic anaerobic digestion characteristics between single-phase and two-phase systems for kitchen garbage treatment[J].Journal of Bioscience & Bioengineering,2008,105(1):48-54

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刊出日期:2018-01-14

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超高温和高温厌氧条件下聚乳酸塑料的降解

王峰^1,
1.南方科技大学工程技术创新中心北京,北京 100083
基金项目:
关键词: 聚乳酸/
高温/
超高温/
厌氧消化
摘要:用批次实验研究了聚乳酸塑料在厌氧消化条件下的降解特性。结果表明,提高处理温度和氨氮浓度可以显著促进聚乳酸分解为乳酸。当聚乳酸作为唯一的基质时,其转化为甲烷的速度缓慢,60 d后甲烷转化率为11.7%。将聚乳酸与餐厨垃圾混合消化则可以促进聚乳酸转化,60 d后的转化率为49.8%。如果将聚乳酸在80 ℃条件下预处理,然后再进行厌氧消化,则22 d后的转化率为81.8%。混合消化和超高温预处理都可以改善聚乳酸的可降解性,其中超高温预处理的促进效果尤为明显。

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