Illumination system for growth and net energy ratio enhancement of Arthrospira (Spirulina) platensis outdoor cultivation in deep raceway pond. (June 2021)

• Record Type: Journal Article
• Authors: Sirikulrat, Krit; Pekkoh, Jeeraporn; Pumas, Chayakorn
• Is Part Of: Bioresource technology reports. Volume 14(2021)
• Publication Date: 2021-06
• Subjects: Outdoor cultivation -- Net energy ratio -- Illumination system -- Open raceway pond -- Light scattering column; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2021.100661
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: One major problem found in open raceway ponds for algae production is the limited light penetrability, which means that the pond depth should not exceed 25–30 cm. This study aimed to use transparent light-scattering column (LSC) to enhance the brightness in the deeper level of a deep raceway pond. A maximum of 16 LSCs were immersed vertically in the testing pond, which was compared with a control pond without LSC. The results showed that the cultivation period to the stationary phase of the LSC pond was 4 days faster than that of the control pond. The biomass productivity and net energy ratio of the LSC pond were respectively found to increase by about 48.3% and 41.7%, while the water loss from evaporation decreased by about 13.6%. The overview from the results indicated that the environment can be conserved by means of reducing the energy, time and water for cultivation. Graphical abstract: Unlabelled Image Highlights: Deep raceway pond illumination improved by light scattering column (LSC). By applying the LSC, the cultivation period was 4 days faster than control pond. The biomass productivity in deep LSC raceway pond increased about 48.3%. LSC reduced water-air surface in raceway pond given 13.6% lower evaporation loss. Resulting in better productivity, cultivation period the NER increased 41.7%.