AI Article Synopsis
- Most marine microalgae are usually grown in coastal areas, but this 185-day study successfully cultivated Nannochloropsis oceanica inland using new photobioreactors (PBRs) of varying sizes.
- A 700-liter PBR showed better adaptability to seasonal changes and produced nearly equal lipid content compared to smaller 150-liter PBRs, suggesting good performance in colder temperatures.
- The study found that the average production cost of N. oceanica was about $11.89 per kg, which is significantly lower than the market price of $20.19 per kg; smaller PBRs were noted to be more cost-effective for energy prices.
Article Abstract
Most marine microalgae are typically cultivated in coastal areas due to challenges in inland cultivation. In this 185 days experiment, Nannochloropsis oceanica was semi-continuously cultivated inland using different photobioreactors (PBRs). The newly designed 700-liter (L) PBR exhibited tolerance to seasonal changes compared to the 150-L PBRs. The innovative in-situ oxygen release rate (ORR) measurement method results indicated that ORR was influenced by light intensity and temperature. The optimal temperature range for N. oceanica growth was 14-25 ℃, demonstrated cold tolerance and lipid accumulation at low temperatures. The maximum lipid content in 700-L and 150-L PBRs was 29 % and 28 %, respectively. Based on the average biomass productivity, the price of N. oceanica was $11.89 kg (or $3.35 kg based on maximum biomass productivity), which is cheaper than the current market price of $20.19 kg. From results, smaller PBRs at the same hydro electricity price are more cost-effective.
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| http://dx.doi.org/10.1016/j.biortech.2024.130829 | DOI Listing |
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