Culture of microalgae biomass for valorization of table olive processing water

C. G. Contreras; A. Serrano; G. Ruiz-Filippi; R. Borja; F. G. Fermoso

doi:10.3989/gya.0439161

Authors

C. G. Contreras Instituto de la Grasa (C.S.I.C.) - School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso
A. Serrano Instituto de la Grasa (C.S.I.C.)
G. Ruiz-Filippi School of Biochemical Engineering, Pontificia Universidad Católica de Valparaíso
R. Borja Instituto de la Grasa (C.S.I.C.)
F. G. Fermoso Instituto de la Grasa (C.S.I.C.)

DOI:

https://doi.org/10.3989/gya.0439161

Keywords:

Microalgae biomass, Phenols, Proteins, Table olive processing water, Valorization

Abstract

Table olive processing water (TOPW) contains many complex substances, such as phenols, which could be valorized as a substrate for microalgae biomass culture. The aim of this study was to assess the capability of Nannochloropsis gaditana to grow in TOPW at different concentrations (10- 80%) in order to valorize this processing water. Within this range, the highest increment of biomass was determined at percentage of 40% of TOPW, reaching an increment of 0.36 ± 0.05 mg volatile suspended solids (VSS)/L. Components of algal biomass were similar for the experiments at 10-40% of TOPW, where proteins were the major compounds (56-74%). Total phenols were retained in the microalgae biomass (0.020 ± 0.002 g of total phenols/g VSS). Experiments for 80% of TOPW resulted in a low production of microalgae biomass. High organic matter, nitrogen, phosphorus and phenol removal were achieved in all TOPW concentrations. Although high-value products, such as proteins, were obtained and high removal efficiencies of nutrients were determined, microalgae biomass culture should be enhanced to become a suitable integral processing water treatment.

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