Volume 32 Issue 2
Mar.  2012
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CHEN Min, DENG Sufang, YANG Youquan, HUANG Yibin, LIU Zhongzhu. Study on O2-supply Characteristics of Azolla in Controlled Ecological Life Support System[J]. Journal of Space Science, 2012, 32(2): 223-229. doi: 10.11728/cjss2012.02.223
Citation: CHEN Min, DENG Sufang, YANG Youquan, HUANG Yibin, LIU Zhongzhu. Study on O2-supply Characteristics of Azolla in Controlled Ecological Life Support System[J]. Journal of Space Science, 2012, 32(2): 223-229. doi: 10.11728/cjss2012.02.223

Study on O2-supply Characteristics of Azolla in Controlled Ecological Life Support System

doi: 10.11728/cjss2012.02.223
  • Received Date: 2011-06-05
  • Rev Recd Date: 2012-01-12
  • Publish Date: 2012-03-15
  • In this study, we try to investigate the O2-supply characteristics under manned condition in order to lay a foundation for carrying out Azolla biological component systematical and general ground simulation experiment and space application. A closed test cabin of Controlled Ecological Life Support System and Azolla wet-culturing devices were built to measure the changes of atmospheric O2-CO2 concentration inside the cabin under “Azolla-fish-men” coexisting condition. The results showed that, O2 consumption amount per unit weight of fish is 0.0805~0.0831L·kg-1·h-1, the CO2 emission amount is 0.0705~0.0736L·kg-1·h-1. Which of trial volunteers is O2 19.71L·h-1 and CO2 18.90L·h-1 under 7000~8000 lx. Artificial light, human and fish respiring and Azolla photosynthetic O2-releasing tend to achieve O2-CO2 homeostasis inside the cabin. Enhancing atmospheric CO2 concentrations in the cabin obviously promoted Azolla group net photosynthesis efficiency. This shows that Azolla has strong photosynthetic O2-release ability, which equilibrates the O2-CO2 concentration inside the cabin in favor of human survival, and then verifies the prospect of Azolla in space application.

     

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