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Development of high performance photosynthetic bioreactor for the fixation of carbon dioxide

开发用于固定二氧化碳的高性能光合生物反应器

基本信息

批准号：
07555390
负责人：
TANISHITA Kazuo
金额：
$ 1.22万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555390/
关键词：
Microalgae carbon dioxide fixation flow adaptation bioreactor earth environment Photo-enviroment photosynthesis life support for closed system

项目摘要

The high performance of photosynthesis in the micro algae is required for gas excange system in CELSS system and fixing carbon dioxide in the atmosphere. Tubular photosynthetic bioreactors are desirable for achieving the efficient design of reactor because of the efficient way of illumination and producing the hydrodynamically mixing in the micro algae suspension. The purpose of this study is to measure the photosynthetic rate of micro algae and clarify the process of photosynthesis with the presence of hydrodyna flow in the tubular reactor system and find the optimum design of reactor achieving the maximum performa photosynthetic rate. Two types of reactors were employed for the prototype units. The first one (CDTR1) is coaxial double cylinder type and the second one (CDTR2) is a coaxial double cylinders with ribs on the inn surface of tubular reactor to mix suspension and scatter light. In high concentrated suspension, the oxygen production rate for the illumination from both outside and inside in CDTR2 was 1.5 times higher than that illumination from outside only in CDTR1. For higher flow rate in the tubular photobioreactor illumination condition for micro algae was improved and growth rate became larger. In micro algae tubular photobiorea with higher concentration, scattering light from both outside and inside which improves illumination condit for micro algae is effective for promoting the performance of photosynthesis.

CELSS系统中的气体交换系统和固定大气中的二氧化碳都需要微藻的高效光合作用。管状光合生物反应器是实现反应器高效设计的理想反应器，其有效的照明方式和微藻悬浮液中流体动力混合的产生。本研究的目的是测量微藻的光合速率，阐明管式反应器系统中存在水螅流时的光合作用过程，并找到实现最大光合作用速率的反应器优化设计。原型机组采用了两种类型的反应堆。第一种（CDTR1）为同轴双缸型，第二种（CDTR2）为同轴双缸型，管式反应器表面有肋，用于混合悬浮液和散射光。高浓度悬浮液中，CDTR2中内外光照的产氧速率是CDTR1中仅外部光照的1.5倍。随着管式光生物反应器流速的提高，微藻的光照条件得到改善，生长速度增大。在浓度较高的微藻管状光生物圈中，从外部和内部散射光线，改善微藻的光照条件，对促进光合作用的性能是有效的。