Gruppo Ricicla - DiSAA - Università degli Studi di Milano, via Celoria 2, 20133 Milan, Italy.
Gruppo Ricicla - DiSAA - Università degli Studi di Milano, via Celoria 2, 20133 Milan, Italy.
Bioresour Technol. 2020 Dec;318:124270. doi: 10.1016/j.biortech.2020.124270. Epub 2020 Oct 16.
A simple biorefinery aimed at producing both biomethane (CH) and polyhydroxyalkanoates (PHAs), was proposed to valorize the organic fraction of municipal solid waste (OFMSW). Anaerobic digestion (AD) was tested at different organic loading rates (OLR-I-II-III) (i.e. 3, 4 and 6 g L d, respectively), producing biomethane and volatile fatty acids (VFAs)-rich digestate, the VFAs were then used to produce PHAs. Specific biogas and CH production remained similar when adopting different OLRs (biogas of 522-600 NL kg VS and CH of 64-67% v/v). VFAs concentrated with OLR increases and their patterns were modified. PHA production was in the range of 117-199 g kg OFMSW with the lowest production being associated to different polymer composition. The net energy recovery of this simple biorefinery accounted for 64% of OFMSW energy content, and the PHAs produced represented over 30% of the total energy.
提出了一种简单的生物炼制厂，旨在同时生产生物甲烷（CH）和聚羟基烷酸酯（PHA），以利用城市固体废物（MSW）中的有机部分（OFMSW）。在不同的有机负荷率（OLR-I-II-III）（即 3、4 和 6 g L d，分别）下测试了厌氧消化（AD），产生富含挥发性脂肪酸（VFAs）的生物甲烷和消化物，然后将 VFAs 用于生产 PHA。采用不同 OLR 时，特定的沼气和 CH 产量保持相似（沼气为 522-600 NL kg VS，CH 为 64-67% v/v）。随着 OLR 的增加，VFAs 浓缩，其模式发生变化。PHA 的产量范围为 117-199 g kg OFMSW，最低产量与不同的聚合物组成有关。该简单生物炼制厂的净能量回收占 OFMSW 能量含量的 64%，而生产的 PHA 占总能量的 30%以上。
