Applicability of water from the Bay of Gdańsk as a growth medium for mixotrophic culture of Platymonas subcordiformis.

Anna Nowicka,Joanna Kazimierowicz,Magda Dudek,Marcin Dębowski,Marcin Zieliński

doi:10.31083/j.fbe1401005

Abstract

P. subcordiformis is a potentially promising species with commercial, environmental and technological viability for industrial applications. The great potential of these microalgae lies in their fast biomass growth, pollution resistance, and compatibility with different culture media. This study aimed to determine the efficiency of P. subcordiformis biomass production in a medium prepared with water from the Bay of Gdańsk. The tested medium supported high biomass growth rates which reached 317.58 ± 42.31 mgV⁢S/dm3⋅d in the best-performing variant, with a final concentration of 3493.3 ± 465.4 mgV⁢S/dm3⋅d. In the autotrophic culture, nitrogen and phosphorus removal exceeded 98%. Amending the mixotrophic culture with glucose did not affect P. subcordiformis concentrations. However, it did significantly limit the demand for nutrients in the biomass and reduced chlorophyll a production in the cells.

Highlights

Pushing forward the development and widespread take-up of environmentally-friendly, efficient and costeffective biomass production technologies represents an ongoing challenge to scientists, as well as a priority issue for operators of energy systems [1]
Chlorophyll concentration was 1986.7 ± 151.7 μg/dm3, with mean r at 180.61 ± 13.80 μg/dm3·d (Fig. 2). These values are nearly 50% lower than those noted in S1V1 (Fig. 2)
Nitrogen take-up was approximately 75.70 ± 0.60% (Fig. 7), which translates to N levels of 5.11 ± 0.13 mg Total nitrogen (TN)/dm3 (Fig. 3)

Summary

Introduction

Pushing forward the development and widespread take-up of environmentally-friendly, efficient and costeffective biomass production technologies represents an ongoing challenge to scientists, as well as a priority issue for operators of energy systems [1]. There is an increasingly common view that intensive use of farmland for growing biofuel crops may lead to decreased global food supply and a significant positive pressure on food prices [6]. Such risks and limitations have been acknowledged by European Union (EU) legislators. Algae possess very high photosynthetic efficiency, can rapidly build biomass, are resistant to various contaminants and can be sited on land that is unsuitable for other purposes Given these considerations, algae may represent a viable substitute for traditional energy cops. The positive effect of DHA and other Omega-3 fatty acids on the cardiovascular system has been proven in many in vivo and in vitro experiments and clinical trials [17]

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Conclusion