From information the crop statistic of Chiang Rai, the first products is rice 740,923 ton/year and the second is corn for animal 340,738 ton/year (Chiang Rai Province, 2014) and most disposal of byproduct in Chiang Rai is open burning (Provincial office of Natural Resources and Environment Chiangrai, 2011) caused by the burning of rice straw and corn cobs from the remaining animals with regarding to environmental impact from open burning of agricultural residues, and causing a negative impact on public health, such as the respiratory system and economic damage