Scale-up of plug-flow reactors in anaerobic treatment of agro-industrial wastes

IF 3.7 3区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Biochemical Engineering Journal Pub Date : 2024-07-26 DOI:10.1016/j.bej.2024.109437

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Abstract

This study is aiming to evaluate the optimization potential of anaerobic digestion systems for the treatment of complex agro-industrial wastes at an industrial scale. In previous work, the performance of a 20 L pilot-scale Plug Flow Reactor (PFR) that was able to operate at Organic Loading Rates (OLRs) of up to 25 kg Chemical Oxygen Demand (COD) m⁻³ d⁻¹, was demonstrated. This concept was then successfully transferred in a semi-industrial scale PFR of a volume equal to 50 m³, and the optimal operational parameters were evaluated. The construction of a full industrial scale facility followed, utilizing initially a 380 m³ PFR. Since PFR systems in practice do not behave ideally, due to short Length to Diameter ratio (L/D) and/or higher axial dispersion, the ideal PFR behavior was compared with real data of the non-ideal industrial-scale system; a performance reduction of 25–30 % was detected. However, the disadvantage of the non-ideal behavior of PFRs can be overcome by the cascaded arrangement of two such reactors (2 × 380 m³ PFRs), leading to a total volume reduction of 35 %, as depicted by experimentation on the industrial scale cascaded PFRs. The optimal design parameters for the PFRs are provided.

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扩大塞流式反应器在厌氧处理农用工业废物中的规模

本研究旨在评估厌氧消化系统的优化潜力，以便在工业规模上处理复杂的农用工业废物。在之前的工作中，20 升中试规模的塞流式反应器（PFR）的性能得到了验证，该反应器可在有机负荷率（OLR）高达 25 千克化学需氧量（COD）m d 的条件下运行。随后，成功地将这一概念移植到容积为 50 米的半工业规模 PFR 中，并对最佳运行参数进行了评估。随后，建造了一个全工业规模的设施，最初使用的是一个 380 米长的 PFR。由于长径比（L/D）较短和/或轴向分散度较高，实际中的并流蓄热式冷凝器系统的性能并不理想，因此将理想的并流蓄热式冷凝器性能与非理想工业规模系统的实际数据进行了比较；结果发现性能降低了 25-30%。然而，通过对工业规模的级联式并流蓄热式反应器进行实验，可以克服并流蓄热式反应器非理想行为的缺点，通过级联布置两个这样的反应器（2 × 380 米并流蓄热式反应器），总体积可减少 35%。我们还提供了并流蓄热式反应器的最佳设计参数。

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来源期刊

Biochemical Engineering Journal 工程技术-工程：化工

CiteScore

7.10

自引率

5.10%

发文量

380

审稿时长

34 days

期刊介绍： The Biochemical Engineering Journal aims to promote progress in the crucial chemical engineering aspects of the development of biological processes associated with everything from raw materials preparation to product recovery relevant to industries as diverse as medical/healthcare, industrial biotechnology, and environmental biotechnology. The Journal welcomes full length original research papers, short communications, and review papers* in the following research fields: Biocatalysis (enzyme or microbial) and biotransformations, including immobilized biocatalyst preparation and kinetics Biosensors and Biodevices including biofabrication and novel fuel cell development Bioseparations including scale-up and protein refolding/renaturation Environmental Bioengineering including bioconversion, bioremediation, and microbial fuel cells Bioreactor Systems including characterization, optimization and scale-up Bioresources and Biorefinery Engineering including biomass conversion, biofuels, bioenergy, and optimization Industrial Biotechnology including specialty chemicals, platform chemicals and neutraceuticals Biomaterials and Tissue Engineering including bioartificial organs, cell encapsulation, and controlled release Cell Culture Engineering (plant, animal or insect cells) including viral vectors, monoclonal antibodies, recombinant proteins, vaccines, and secondary metabolites Cell Therapies and Stem Cells including pluripotent, mesenchymal and hematopoietic stem cells; immunotherapies; tissue-specific differentiation; and cryopreservation Metabolic Engineering, Systems and Synthetic Biology including OMICS, bioinformatics, in silico biology, and metabolic flux analysis Protein Engineering including enzyme engineering and directed evolution.