Cynthia Urrutia Molina , María Eugenia González Quijón , Erwin Yañez , Claudio R. Navarro , Camilo Rodríguez-Villegas , David Silva
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引用次数: 0
Abstract
The increasing demand for sustainable wastewater treatment solutions has led to the exploration of microalgae-based systems, which offer dual benefits of pollutant removal and biomass valorization. This study investigates the potential of Chlorella vulgaris cultivated in mixed salmon industry wastewater with varying salinity conditions (synthetic, natural, and industrial sources) for bioremediation and bio-crude oil production. The removal efficiencies for heavy metals reached 64.63 % for Cu in RM treatment, 32.76 % for Zn in RN treatment, and 9.43 % for Pb in YR treatment. Regarding nutrient uptake, YR demonstrated the highest efficiency, removing 75.44 % of N and 16.54 % of PO₄3−. These results demonstrate the capability of microalgae to remediate wastewater under different saline conditions. Confocal Laser Scanning Microscopy (CLSM) analysis revealed significant lipid accumulation. The highest relative mean fluorescence intensity was recorded for the YR treatment (2624 ± 806 AU), followed by RM (1468 ± 2160 AU) and RN (1396 ± 1276 AU), confirming the influence of salinity on lipid biosynthesis. The bio-crude oil yield obtained from HTL of microalgal biomass ranged from 3.15 % to 10.26 % for RN and RM, respectively, showing an effect of the salinity conditions and nutrient availability in the culture medium. These results are indicative of its potential, which could be applicable to food or biofuel products developed in support of a circular bioeconomy in the salmon industry. Future research should focus on refining the process conditions to maximize energy recovery and resource efficiency in large-scale applications.
期刊介绍：
Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment
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