Biomedical Engineering Reference
In-Depth Information
Table 1. Characters of the domestic wastewater
Concentration (mgL
-1
)
Item
COD 160-430
a
TN 40-60
TP 5-10
NH
4
+
-N 30-50
NO
3
-
-N <1
NO
2
-
-N <1
a
COD concentration ranged from 160-430 mgL
-1
with 80% possibility lower than 200 mgL
-1
Synthetic wastewater was used in experimental operations of anaerobic-anoxic SBR
reactors. Characteristics of the wastewater were listed in table 2-4, where different
concentrations of NO
3
-
-N were used to control influent COD/ NO
3
-
-N as 3, 6, and 12
respectively.
pH was measured with glass electrode (Leici, Shanghai China); Temperature (T) was
measured with mercury temperature meter (Ruiming, China); COD, TN, TP, NH
4
+
-N, NO
3
-
-
N, and NO
2
-
-N were measured with standard methods (APHA, 1998).
Table 2. Main components of the synthetic wastewater
Concentration (mgL
-1
)
Components
Chemicals
COD
200
NaAc
NH
3
-N
10
NH
4
Cl
TP
6
KH
2
PO
4
and K
2
HPO
4
(1:1 in mass)
1mLL
-1
Trace solution
Refer to table 4
Table 3. Main components of the nitrate solution
Concentration (mgL
-1
)
Components
Chemicals
NO
3
-
-N
17/34/68
KNO
3
TP
6
KH
2
PO
4
and K
2
HPO
4
(1:1 in mass)
1 mLL
-1
Trace solution
Refer to table 4
Table 4. Main components of the trace solution
Concentration (mgL
-1
)
Components
FeCl
3
0.900
H
3
BO
3
0.150
CaCl
2
·6H
2
O
0.150
CuSO
4
·5H
2
O
0.030
KI
0.180
MnCl
2
·4H
2
O
0.060
Na2MoSO
4
·2H
2
O
0.060
ZnSO
4
·7H
2
O
0.120
