Long-term outdoor operation of microalgae-based digestate treatment: Impact of external drivers on process performances and techno-economic assessment.

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-03-17 DOI:10.1016/j.biortech.2025.132406

S Rossi, M Mantovani, F Marazzi, V Mezzanotte, E Ficara

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引用次数: 0

Abstract

A pilot-scale algal pond for liquid digestate treatment (5.8 m², 0.75-1.83 m³) was operated outdoor for 1145 cumulative days. Key performance indicators were correlated with relevant external drivers including influent characteristics, weather conditions, and operational parameters, gaining information for management and optimisation. A techno-economic assessment allowed to calculate and validate process costs for a scaled-up plant (2-ha). Despite external factors, thanks to consistent nitrification, ammonium removal was high and stable during all trials (85 ± 8 %). Environmental and operational conditions strongly influenced phosphate removal (51 ± 21 %) and biomass productivity (10.4 ± 6.6 g TSS/m²/d). High biomass productivities were associated to global radiation, while phosphate removal was mostly influenced by digestate characteristics. The relatively low biomass production costs (6.9 €/kg or 7.4 $/kg) and substantial savings for liquid digestate bioremediation (3.4 €/m³ or 3.7 $/m³) and N removal (15.1 €/kg N or 16.2 $/kg N) confirmed the potential of microalgae-based technologies as a cost-effective and sustainable alternative to conventional approaches.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.