2004 Volume 66 Issue 3 Pages 77-83
Biogas plant in Japan excluding Hokkaido is designed so that fermentation remains, called digested slurry, may not be used in cultivation as fertilizer and they are separated into solid and liquid, and after separation liquid remains are purified and solid remains are composted. But in this case the cost was too expensive. This paper describes that the utilization of digested slurry in a paddy field effected on the growth of paddy rice and wheat and its environmental load when they are applied to the fields as fertilizer. The results of the experiment show that the growth of paddy rice and wheat applied with digested slurry was less different from that with chemical fertilizer and the ammonia emission was suppressed by applying into soil.
