高温和嗜热连续厌氧工艺中聚乳酸与厨余垃圾的共消化。

Co-digestion of polylactide and kitchen garbage in hyperthermophilic and thermophilic continuous anaerobic process.

机构信息

Department of Environmental Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan.

出版信息

Bioresour Technol. 2012 May;112:67-74. doi: 10.1016/j.biortech.2012.02.064. Epub 2012 Feb 22.

DOI:10.1016/j.biortech.2012.02.064

Abstract

Two series of two-phase anaerobic systems, consisting of a hyperthermophilic (80°C) reactor and a thermophilic (55°C) reactor, fed with a mixture of kitchen garbage (KG) and polylactide (PLA), was compared with a single-phase thermophilic reactor for the overall performance. The result indicated that ammonia addition under hyperthermophilic condition promoted the transformation of PLA particles to lactic acid. The systems with hyperthermophilic treatment had advantages on PLA transformation and methane conversion ratio to the control system. Under the organic loading rate (OLR) of 10.3 g COD/(L day), the PLA transformation ratios of the two-phase systems were 82.0% and 85.2%, respectively, higher than that of the control system (63.5%). The methane conversion ratios of the two-phase systems were 82.9% and 80.8%, respectively, higher than 70.1% of the control system. The microbial community analysis indicated that hyperthermophilic treatment is easily installed to traditional thermophilic anaerobic digestion plants without inoculation of special bacteria.

摘要

两组两相厌氧系统，由一个高温（80°C）反应器和一个中温（55°C）反应器组成，以厨房垃圾（KG）和聚乳酸（PLA）的混合物为进料，与单相中温反应器相比，考察了整体性能。结果表明，在高温条件下添加氨促进了 PLA 颗粒向乳酸的转化。高温处理的系统在 PLA 转化和甲烷转化率方面优于对照系统。在有机负荷率（OLR）为 10.3 g COD/（L·天）时，两相系统的 PLA 转化率分别为 82.0%和 85.2%，高于对照系统（63.5%）。两相系统的甲烷转化率分别为 82.9%和 80.8%，高于对照系统的 70.1%。微生物群落分析表明，高温处理可以很容易地安装到传统的中温厌氧消化厂，而无需接种特殊细菌。