2.2 Pre-treatment Technologies of Anaerobic Fermentation
27
Table 2.2
Changes of metabolites including COD, TOC and TN
Pre-treatments
COD (mg/L)
TOC (mg/L)
TN (mg/L)
Initial
HS
MS
Initial
HS
MS
Initial
HS
MS
Blank
7408
12,470
3030
1970
2295
1383
1130
937.1
526.4
0.25% HCL
5706
13,780
7238
2724
8624
2468
90.8
384.4
556
1% HCL
7562
12,154
10,440
2728
6492
4624
91.2
532
396
0.5% NaOH
6920
14,940
5416
2912
9444
2260
110.8
351.2
580
1% NaOH
7562
13,976
10,260
3172
8652
2404
142.4
308.8
492
3% NaOH
11,522
12,978
8920
6372
11,040
3516
696
536
612
10 mg enzyme
11,310
17,286
5700
6776
8532
3060
492
656
596