Effective Harvesting of Nannochloropsis Microalgae Using Mushroom Chitosan: A Pilot-Scale Study.


Icon for Frontiers Media SA Icon for PubMed Central Related Articles

Effective Harvesting of Nannochloropsis Microalgae Using Mushroom Chitosan: A Pilot-Scale Study.

Front Bioeng Biotechnol. 2020;8:771

Authors: Chua ET, Shekh AY, Eltanahy E, Thomas-Hall SR, Schenk PM

Abstract
For efficient downstream processing, harvesting remains as one of the challenges in producing Nannochloropsis biomass, a microalga with high-value omega-3 oils. Flocculation is an effective, low-energy, low-cost method to harvest microalgae. Chitosan has been shown to be an effective food-grade flocculant; however, commercial chitosan is sourced from crustaceans, which has disadvantages including concerns over heavy-metal contamination. Thus, this study tests the flocculation potential of mushroom chitosan. Our results indicate a 13% yield of chitosan from mushroom. The identity of the prepared chitosan was confirmed by Fourier-transform infrared (FTIR) spectroscopy. Furthermore, results show that mushroom chitosan can be an alternative flocculant with >95% flocculation efficiency when tested in 100-mL jar and 200-L vertical column photobioreactor. Applications in a 2000-L raceway pond demonstrated that thorough mixing of mushroom chitosan with the algal culture is required to achieve efficient flocculation. With proper mixing, mushroom chitosan can be used to produce food-grade Nannochloropsis biomass suitable for the production of vegan omega-3 oils as a fish oil alternative.

PMID: 32766222 [PubMed]

Higher toenail selenium is associated with increased insulin resistance risk in omnivores, but not in vegetarians.

Related Articles Higher toenail selenium is associated with increased insulin resistance risk in omnivores, but not in vegetarians. Nutr Metab (Lond). 2020;17:62 Authors: Gu Q, Cui X, Du K, Wang B, Cai W, Tang Q, Shen X Abstract Background: The relationship between selenium (Se) and insulin resistance remains unclear. We aim to explore the association … Continue reading

Seaweed diversity within intertidal zone of Olaikuda and Vadakkadu, Rameshwaram, southeast coast of India.

Related Articles Seaweed diversity within intertidal zone of Olaikuda and Vadakkadu, Rameshwaram, southeast coast of India. Heliyon. 2020 Jul;6(7):e04585 Authors: Roy S Abstract Seasonal variation of seaweed diversity was studied in Olaikuda and Vadakkadu, the two unexplored coastal areas in Rameshwaram Island in south coast of India. An extensive survey on seasonal changes of seaweed … Continue reading

Changes in biochemical parameters by gender and time: Effect of short-term vegan diet adherence.

Related Articles Changes in biochemical parameters by gender and time: Effect of short-term vegan diet adherence. PLoS One. 2020;15(8):e0237065 Authors: Sisay T, Tolessa T, Mekonen W Abstract BACKGROUND: Vegetarian diets adapted for various reasons that may include religious, ethical, and health considerations have reasonable health benefits including weight loss, and favorable metabolic changes. However, studies … Continue reading

Fortified vegetarian milk for prevention of metabolic syndrome in rats: impact on hepatic and vascular complications.

Related Articles Fortified vegetarian milk for prevention of metabolic syndrome in rats: impact on hepatic and vascular complications. Heliyon. 2020 Aug;6(8):e04593 Authors: Hussein AMS, Fouda K, Mehaya FM, Mohamed DA, Mohammad AA, Abdelgayed SS, Mohamed RS Abstract Metabolic syndrome (MetS) is characterized as a gathering of various metabolic disorders, for example, hyperglycemia, dyslipidemia, and obesity. … Continue reading

Shortening telomere is associated with subclinical atherosclerosis biomarker in omnivorous but not in vegetarian healthy men.

Related Articles Shortening telomere is associated with subclinical atherosclerosis biomarker in omnivorous but not in vegetarian healthy men. Aging (Albany NY). 2019 07 19;11(14):5070-5080 Authors: Cinegaglia N, Antoniazzi L, Rosa D, Miranda D, Acosta-Navarro J, Bortolotto L, Hong V, Sandrim V Abstract Telomere length is considered to be a biomarker of biological aging and age-related … Continue reading

Life Extension Membership