| 论文摘要： |
The effect of thermal activation of peroxydisulfate (PDS) pretreatment on anaerobic fermentation (AF) of waste activated sludge (WAS) was investigated. WAS pretreatment was conducted at 35 degrees C and 55 degrees C with PDS dosage increasing from 0.1 to 0.9 mM/g TSS (total suspended solids). Experimental results showed that sludge solubilization and short chain fatty acids (SCFAs) production were significantly improved after pretreatment, while methanogenesis was severely inhibited. The maximum total SCFAs yield of 3183.51 mg COD/L occurred at 55 degrees C with 0.3 mM PDS/g TSS addition and day 9 of AF, which was 2.1, 1.3 and 1.1 fold of the blank, 55 degrees C and 35 degrees C + 0.3 mM PDS/g TSS pretreated samples, respectively. In addition, thermal activated PDS pretreatment could enhance the dewaterability of fermented sludge, which was advantageous for subsequent disposal of sludge. |
