Integrated Cultivation and Photohydrogen Production of Tetraselmis Subcordiformis in a Flat-plate Photobioreactor System

Chem. J. Chinese Universities

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Integrated Cultivation and Photohydrogen Production of Tetraselmis Subcordiformis in a Flat-plate Photobioreactor System

ZHENG Yang^1,2, CHEN Zhao-An¹, FU Yun-Bin^1,2, LU Hong-Bin¹, ZHANG Wei^1*

1. Marine Bioproducts Engineering Group, Dalian Institute of Chemical and Physics, Chinese Academy of Sciences, Dalian 116023, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China

Received:2008-02-28 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
Contact: ZHANG Wei

Abstract

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 PSⅡactivity 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, PSⅡactivity 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.

Key words: Flat-plate photobioreactor, Process integration, Tetraselmis subcordiformis, Chlorophyll fluorescence, Fuel cell

CLC Number:

Q949.2

TrendMD:

ZHENG Yang^1,2, CHEN Zhao-An¹, FU Yun-Bin^1,2, LU Hong-Bin¹, ZHANG Wei^1*. Integrated Cultivation and Photohydrogen Production of Tetraselmis Subcordiformis in a Flat-plate Photobioreactor System[J]. Chem. J. Chinese Universities, doi: .

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Integrated Cultivation and Photohydrogen Production of Tetraselmis Subcordiformis in a Flat-plate Photobioreactor System

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