| Abstrakt: |
The influence of different initial moisture content on the degradation of phenanthrene was studied during sewage sludge composting under the same aerobic fermentation conditions. Wood chips were used as amendment and the moisture content of mixture was adjusted to 56.21% (treatment 1) or 60.89% (treatment 2). The results showed that initial moisture content has a significant effect on sewage sludge composting, the composting of two treatments all lasted 12 days. In addition, variations in moisture content led to different temperature tendencies, with the temperature of treatment 1 increasing faster than that of treatment 2, while the thermophilic stage of treatment 2 lasted for longer than that of treatment 1. The overall oxygen content, moisture content, volatile solids, pH, and total nitrogen content of the two treatments were basically the same. Microbial degradation of phenanthrene during sewage sludge composting primarily occurred in the rapid heating stage and thermophilic temperature stage, and a portion of the 4-5 ring polycyclic aromatic hydrocarbons would concentrate relatively. The phenanthrene degradation rate of treatment 1 and treatment 2 were 52.37% and 45.64%, respectively. Based on the phenanthrene degradation efficiency, an initial moisture water content of 56.21% should be used during the sewage sludge composting. [ABSTRACT FROM AUTHOR] |
