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Analysis of $CO_2$ and Harmful Gases Caused by Using Burn-type $CO_2$ Generators in Greenhouses  

Park, Jong-Seok (Research Institute of Industrial Science & Technology)
Shin, Jong-Wha (Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National University)
Ahn, Tae-In (Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National University)
Son, Jung-Eek (Department of Plant Science and Research Institute for Agriculture and Life Sciences, Seoul National University)
Publication Information
Journal of Bio-Environment Control / v.19, no.4, 2010 , pp. 177-183 More about this Journal
Abstract
Bum-type $CO_2$ generators are widely used in greenhouses for the purpose of $CO_2$ supply for photosynthesis and greenhouse heating. However harmful gases included in the air might give severe effects on the plant growth. For investigating the possible emission of harmful gases from commercial bum-type $CO_2$ generators, we carried out the analysis of the harmful by-products (NO, NOx, $NO_2$, CO, and VOCs) and $CO_2$ caused by using a bum-type $CO_2$ generator in greenhouses. And the harmful by-products from different type of fuels such as kerosene, LPG, and LNG were quantified. In order to minimize the uncertainties from a $CO_2$ generator, 4 different $CO_2$ generators were utilized in four plastic greenhouses and a glasshouse located at different places during the experimental works. The results showed that the concentration of NOx is proportional to $CO_2$ concentration. Levels of harmful gases in the most of greenhouses, where the new bum-type $CO_2$ generators were installed, were lower than 1.0 ppm when $CO_2$ concentration was set at 1,000 ppm. In case of LNG combustion, the concentration of CO reached out up to 300 ppm and pre-treatment for CO reduction, such as the adsorption process, would be inevitable to abate the adverse effects on plant growth.
Keywords
$CO_2$ enrichment; $CO_2$ generator; harmful gases; Kerosene; LPG;
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