Preprint Article Version 1 This version is not peer-reviewed

Photofermentative Poly-3-Hydroxybutyrate Production by Rhodopseudomonas Sp. S16-VOGS3 in a Novel Outdoor L-Shaped Row Photobioreactor

Version 1 : Received: 26 July 2018 / Approved: 26 July 2018 / Online: 26 July 2018 (15:56:26 CEST)

A peer-reviewed article of this Preprint also exists.

Carlozzi, P.; Seggiani, M.; Cinelli, P.; Mallegni, N.; Lazzeri, A. Photofermentative Poly-3-Hydroxybutyrate Production by Rhodopseudomonas sp. S16-VOGS3 in a Novel Outdoor 70-L Photobioreactor. Sustainability 2018, 10, 3133. Carlozzi, P.; Seggiani, M.; Cinelli, P.; Mallegni, N.; Lazzeri, A. Photofermentative Poly-3-Hydroxybutyrate Production by Rhodopseudomonas sp. S16-VOGS3 in a Novel Outdoor 70-L Photobioreactor. Sustainability 2018, 10, 3133.

Journal reference: Sustainability 2018, 10, 3133
DOI: 10.3390/su10093133

Abstract

In the present study, the performance of a 70 L photobioreactor, operating outdoors, was investigated using a purple bacterial strain as Rhodopseudomonas sp. S16-VOGS3 for producing poly-3-hydroxybutyrate (PHB). The novel photobioreactor was equipped with 5L-shaped rows; the bottom of every row was placed in a stainless-steel tank containing water with controlled temperature. The photofermentation trials were carried out under fed-batch mode and under a semi-continuous regimen using lactic acid as carbon source. The effect of the irradiance and the C/N ratio on the PHB accumulation was investigated, in order to evaluate the optimal bacterial growth. The results showed the feasibility of the prototype photobioreactor for the production of PHB by Rhodopseudomonas sp. S16-VOGS3 under the natural light/dark cycle. During the fed-batch growth (144 h long), the cumulative PHB increased quickly reaching the maximum value of 377 mg/L and decreased to 255 mg/L during the semi-continuous regimen (336 h long).

Subject Areas

photobioreactor; Rhodopseudomonas sp. S16-VOGS3; poly-3-hydroxybutyrate; thermal analysis; C/N ratio

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