Impact of Different Carbon Supplement on Simultaneous Production of C-phycocyanin (C-PC) and Poly-ß-hydroxybutyrate (PHB) from Nostoc Muscorum

Abstract

In this study, simultaneous production of poly-ß-hydroxybutyrate (PHB) and C-phycocyanin (C-PC) from Nostoc muscorum was investigated. PHB yield after C-PC extraction was not found differ significantly as without C-PC extraction. Under photoautotrophic growth condition, the test cyanobacterium was found to accumulate PHB and C-PC with a maximum yield of 40 and 57 mg l-1 respectively at the stationary phase, i.e. on day 21 of incubation. The most significant enhancement in C-PC yield up to 146 mg l-1 was recorded in 0.4 % fructose supplementation. High C-PC and PHB accumulation was recorded in 0.4% fructose supplementation followed by 0.4% glucose supplementation. A highly positive correlation between biomass yield and PHB content depicted that the rise in PHB content under supplementation of glucose, fructose, maltose and sucrose was due to boost in growth. Thus, present study demonstrates simultaneous production of both the products, i.e. PHB and C-PC is possible.