Université de Lyon, INSA Lyon, DEEP Laboratory, EA7429, F-69621 Villeurbanne cedex, France.
Université de Lyon, INSA Lyon, DEEP Laboratory, EA7429, F-69621 Villeurbanne cedex, France; Universidade Federal da Paraiba, Dep. Engenharia Civil e Ambiental DECA, João Pessoa, Brazil.
Sci Total Environ. 2020 May 10;716:137084. doi: 10.1016/j.scitotenv.2020.137084. Epub 2020 Feb 3.
Biowaste material is a good candidate for the production of energy in urban territories. The presence of undesirable or constituents mixed with the biowaste collected by municipalities makes it difficult to recycle organic matter of sufficient quality for agricultural uses. Methane production is particularly attractive for energy recovery notably because this energy vector can be distributed using the grid already in place for natural gas in many cities. Depending on the origin and biochemical composition of biowaste, methane can be produced using thermochemical (gasification then syngas methanation) or biological processes (anaerobic digestion). The objective of this work was to characterize the ability of biowaste to be used as a feedstock for anaerobic digestion. Based on considerations such as the quantities produced and the availability, four categories of biowaste produced in the city of Lyon were identified as potential key resources: Garden biowaste (GBW), restauration biowaste (RBW), household biowaste (HBW) and supermarkets biowaste (SMBW). Representative samples were taken from the sites of production and analyzed for parameters including biomethane potential (BMP). Each sample was then fractioned by leaching and the distribution of the BMP between the particulate fraction and the readily soluble fraction was assessed. GBW organic matter exhibited high hemicellulose content (over 81% of VS) and a low BMP which was very poorly distributed into its soluble fraction (2 NL·kg). RBW, HBW and SMBW showed a much higher BMP with a strong distribution in the soluble fraction (100 NL·kg). Plastic materials were found to account for up to 40% of the mass of SMBW sample. Altogether, GBW was identified as non-favorable for anaerobic digestion and recommended rather for thermochemical conversion. HBW, RBW and SMBW revealed adapted to anaerobic. Pulping was shown to be applicable in order to convert the 3 biowaste materials into a pumpable slurry with high biomethane potential.
生物废物材料是城市地区生产能源的理想选择。由于市政收集的生物废物中存在不希望有的成分或与生物废物混合的成分，因此难以回收足够质量的有机物质用于农业用途。甲烷生产特别吸引人，因为这种能源载体可以使用许多城市已经存在的天然气管网进行分配。根据生物废物的来源和生化组成，甲烷可以通过热化学（气化然后合成气甲烷化）或生物过程（厌氧消化）来生产。本工作的目的是确定生物废物作为厌氧消化原料的能力。基于产量和可用性等考虑因素，确定了里昂市生产的四类生物废物作为潜在的关键资源：园林生物废物（GBW）、餐饮生物废物（RBW）、家庭生物废物（HBW）和超市生物废物（SMBW）。从生产现场采集代表性样品，并分析包括生物甲烷潜力（BMP）在内的参数。然后，通过浸出对每个样品进行分级，并评估 BMP 在颗粒部分和易溶部分之间的分布。GBW 有机物的半纤维素含量（超过 VS 的 81%）较高，BMP 非常低，且不易溶于其可溶部分（2NL·kg）。RBW、HBW 和 SMBW 表现出更高的 BMP，且其在可溶部分的分布较强（100NL·kg）。发现塑料材料占 SMBW 样品质量的 40%。总的来说，GBW 不适合用于厌氧消化，建议进行热化学转化。HBW、RBW 和 SMBW 适合用于厌氧消化。纸浆化被证明适用于将这 3 种生物废物材料转化为具有高生物甲烷潜力的可泵送泥浆。
