BIOGAS PRODUCTION FROM BIODEGRADABLE BIOPLASTICS
BIOGAS PRODUCTION FROM BIODEGRADABLE BIOPLASTICS
复制标题
利用可生物降解的生物塑料生产沼气
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
R. Marchetti
中科院分区：
文献类型：
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作者：
C. Vasmara;R. Marchetti
在这项研究中，从生物可降解的生物塑料沼气生产的潜力进行了评估。Mater-Bi®（玉米淀粉基柔性膜系列）和PLA（聚乳酸;一种刚性聚乳酸基聚合物）生物塑料在实验室分批反应器中在35 ° C或55 ° C下单独消化或与猪浆或scotta（部分脱蛋白奶酪乳清）共消化。在孵育期间监测甲烷（CH4）和氢气（H2）的产生。测定了每个反应器的最大CH4（Mmax）或H2（Hmax）产量、潜在CH4（BMP）或H2（BHP）产量g-1挥发性固体（VS）以及在无水状态下的残留VS。当生物塑料单独或与猪泥浆一起消化时产生甲烷，而H2仅在与scotta共消化时产生。Mmax、BMP、Hmax和BHP在55 ° C下平均高于35 ° C下（分别为+69%、+158%、+51%和+45%）。在35 ° C下，在单消化中，仅用Mater-Bi®产生少量CH4（33 mL g-1 VS）。在55 ° C下，Mater-Bi®和PLA的BMP分别等于113 mL和282 mL CH4 g-1 VS。MaterBi®和PLA在55 ° C下的单消化将初始VS含量降低了51%。当PLA与猪泥浆共消化时，Mmax比理论值高12%，具有协同效应。在与scotta的共消化中，对于在35 ° C下孵育的Mater-Bi®，观察到H2产量几乎显著增加12%。在厌氧消化中利用生物塑料废物生产沼气，与传统堆肥一起或替代传统堆肥，似乎是成功的废物管理的一种有希望的可能性。
In this study, the potential for biogas production from biodegradable bioplastics was evaluated. Mater-Bi® (a family of maizestarch based flexible films) and PLA (PolyLactic Acid; a rigid, polylactide-based, polymer) bioplastics were digested in laboratory batch reactors, alone or in co-digestion with pig slurry or scotta (partially deproteinized cheese whey), at 35°C or 55°C. Methane (CH4) and hydrogen (H2) production were monitored during the incubation period. Maximum CH4 (Mmax) or H2 (Hmax) production per reactor, potential CH4 (BMP) or H2 (BHP) production g-1 volatile solids (VS), and residual VS in the digestates were determined. Methane was produced when bioplastics were digested alone or with pig slurry, whereas H2 was produced only in co-digestion with scotta. Mmax, BMP, Hmax and BHP were on average higher at 55°C than at 35°C (+69%, +158%, +51% and +45%, respectively). At 35°C, in monodigestion, small amounts of CH4 (33 mL g-1 VS) were produced with Mater-Bi® only. At 55°C, the BMP for Mater-Bi® and for PLA were equal to 113 mL and 282 mL CH4 g-1 VS, respectively. Monodigestion of MaterBi® and PLA at 55°C reduced the initial VS content by 51%. When PLA was in co-digestion with pig slurry, Mmax was 12% higher than the theoretical one, with a synergistic effect. In co-digestion with scotta, a nearly significant 12% increase in H2 production was observed for Mater-Bi® incubated at 35°C. The exploitation of bioplastic waste in anaerobic digestion for biogas production, together with or in alternative to conventional composting, appears a promising possibility for a successful waste management.