3.4. Changes in GI
Fig. 5 shows the changes in the GI during the composting process in different reactors. The differences in the GI of the compostobtained from the three treatments were obvious, especially between the GI of the compost obtained from solar treatment and that obtained from the other two treatments. In the early phase of composting, the GI of the compost from the solar reactor rapidly increased after a decrease, while only a subtle increase in the GI occurred in the compost obtained from the ordinary and greenhouse reactors, indicating the difficulty in eliminating phytotoxic substances at low temperatures. The initial low GI may be closely associated with the NH3 levels (Fig. 5), as suggested in other
studies on compost obtained from animal manures (Ramirez-Perez et al., 2007). At the end of the composting process, the GI of the compost from ordinary, solar, and greenhouse treatments reached 71%, 91%, and 70%, respectively. It has been reported that the GI is an indicator of the phytotoxic condition of the compost (Tiquia and Tam, 1998). Thus, when compared with the three treatments, the solar treatment achieved the highest compost maturity.
3.4. Changes in GIFig. 5 shows the changes in the GI during the composting process in different reactors. The differences in the GI of the compostobtained from the three treatments were obvious, especially between the GI of the compost obtained from solar treatment and that obtained from the other two treatments. In the early phase of composting, the GI of the compost from the solar reactor rapidly increased after a decrease, while only a subtle increase in the GI occurred in the compost obtained from the ordinary and greenhouse reactors, indicating the difficulty in eliminating phytotoxic substances at low temperatures. The initial low GI may be closely associated with the NH3 levels (Fig. 5), as suggested in otherstudies on compost obtained from animal manures (Ramirez-Perez et al., 2007). At the end of the composting process, the GI of the compost from ordinary, solar, and greenhouse treatments reached 71%, 91%, and 70%, respectively. It has been reported that the GI is an indicator of the phytotoxic condition of the compost (Tiquia and Tam, 1998). Thus, when compared with the three treatments, the solar treatment achieved the highest compost maturity.
การแปล กรุณารอสักครู่..
