Matching of Gas Metabolism among Crop Community, Human and Animal in the CEEF

Rating of daily amounts of CO₂ and O₂ exchange of crops, animals and humans to be involved in the long-term habitation experiments using the Closed Ecology Experiment Facilities (CEEF) were carried out. Daily amounts of the CO₂-absorption and O₂-generation of crops including rice, soybeans and other 27 vegetables were estimated from data obtained from a sequential crop cultivation experiment conducted from August to December of FY2001. Daily amounts of O₂-consumption and CO₂-expiration of two female Shiba goats to be involved were estimated based on gas exchange determination conducted in FY2002. Daily amounts of CO₂-expiration and O₂-consumption of two persons to be involved were estimated based on correlation between respiration rate and heart rate, heart rate data during the simulated habitation in the CEEF and a tentative work schedule. In order to discuss about whole material circulation, it is necessary to accumulate more data on rates of O₂-consumption and CO₂-generation of the waste processors and those on performance of the Sabatier O₂ recovery system, in addition to those on biological systems.