Integrated cultivation and photohydrogen production of tetraselmis subcordiformis in a flat-plate photobioreactor system

Yang Zheng, Zhao An Chen, Yun Bin Fu, Hong Bin Lu, Wei Zhang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper aimed to develop an integrated processes of microalgal cultivation and hydrogen photoproduction in a flat-plate photobioreactor system combined with alkaline fuel cell. The optimal high cell density of 8.5 × 106 cell/mL was achieved on 9 d when the cultivation of Tetraselmis subcordiformis was supplemented with CO2 of 2%-5% (volume fraction) in the flat-plate photobioreactor. When the bioreactor system was switched to the hydrogen production condition, hydrogen evolution was induced by the addition of carbonylcyanide (m-chlorophenylhydrazone, CCCP) and anaerobic condition, with a maximum hydrogen production rate of 1.1 mL/(h·L) for 60 h. The kinetics analysis of algal chlorophyll fluorescence was carried out to identify the limiting factors in both algal growth and hydrogen production at 2% CO2 supplementation. At hydrogen production phase, algal PS II activity and relative electron transfer rate (rETR) decreased with the increase of time, which caused the decline and eventual stop in hydrogen production. To sustain the hydrogen production, PS II activity and rETR must be maintained. The results demonstrate the feasibility of process integration of algal cultivation and hydrogen production in one single system, which will significantly improve the process economics.

Original languageEnglish
Pages (from-to)2209-2212
Number of pages4
JournalGaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities
Volume29
Issue number11
Publication statusPublished - 1 Nov 2008
Externally publishedYes

Keywords

  • Chlorophyll fluorescence
  • Flat-plate photobioreactor
  • Fuel cell
  • Process integration
  • Tetraselmis subcordiformis

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