earticle

영어

The remainded solids of food wastes saccharified and the process remnants generated from bacterial cellulose production were fermentated using two-phase UASB reactor. The aim of this study was to examine the availability of methane sludge as a liquid fertilizer. The total nitrogen content in methane sludge was 0.08～0.11%. It is lower than a liquid fertilizer standard of official fixture(<0.3%). The concentration of heavy metals in methane sludge were not detected or lower than a liquid fertilizer standard of official fixture, too. The electronic conductivity of soil with and without methane sludge was 23.37, 18.16 uS/cm, respectively. In garden Balsam plants watered with methane sludge, both length of leaf and stem of the plants were 2 cm longer than control, and the stem diameter was 1 mm thicker. So, it was considered that methane sludge has availability as a liquid fertilizer and did not cause unfavorable effect to plants or soil.