Kinetics Study of a Suspended Growth System for Biological …
343
Table 2 Characterization of real-life bakery and confectionery wastewater
S. No.
Parameters
Values
1
COD (mg/L)
1350 ± 30
2
BOD 5 (mg/L)
905 ± 30
3
TSS (mg/L)
550 ± 30
4
Ammoniacal nitrogen (mg/L)
65 ± 10
5
pH
7.4 ± 0.2
attributed to the presence of different ions which generally are major constituents of
the different cleansing agents and disinfectants used during the operation and maintenance stages. BOD 5 of the real-life wastewater was found to be 905 ± 30 mg/L
that indicates the presence of biodegradable organic matter in wastewater.
3.2 Carbon Oxidation Study of Simulated Bakery
and Confectionery Wastewater in Batch Reactor
The time concentration study for organic (COD) reduction with respect to the initial
COD concentration value of 1352.16 mg/L is shown in Fig. 2. From Fig. 2, it was
observed that the concentration of COD decreases with the progress of reaction time.
The plot also reveals that within a 22 h of contact time, maximum COD removal was
achieved (96.58%) beyond which the removal percentage was found to be marginal
and the curve becomes asymptotic in nature, which indicates maximum stabilization
of organic matter of wastewater within the above reaction period. Figure 3 demonstrates that there is a steady ascending in MLSS concentration up to a time period of
22 h, from initial MLSS concentration 2025 mg/L. After 22 h, the rate of increase
Fig. 2 COD removal profile during carbon oxidation study in batch reactor for simulated wastewater
sample [Initial COD concentration = 1352.16 mg/L]
343
Table 2 Characterization of real-life bakery and confectionery wastewater
S. No.
Parameters
Values
1
COD (mg/L)
1350 ± 30
2
BOD 5 (mg/L)
905 ± 30
3
TSS (mg/L)
550 ± 30
4
Ammoniacal nitrogen (mg/L)
65 ± 10
5
pH
7.4 ± 0.2
attributed to the presence of different ions which generally are major constituents of
the different cleansing agents and disinfectants used during the operation and maintenance stages. BOD 5 of the real-life wastewater was found to be 905 ± 30 mg/L
that indicates the presence of biodegradable organic matter in wastewater.
3.2 Carbon Oxidation Study of Simulated Bakery
and Confectionery Wastewater in Batch Reactor
The time concentration study for organic (COD) reduction with respect to the initial
COD concentration value of 1352.16 mg/L is shown in Fig. 2. From Fig. 2, it was
observed that the concentration of COD decreases with the progress of reaction time.
The plot also reveals that within a 22 h of contact time, maximum COD removal was
achieved (96.58%) beyond which the removal percentage was found to be marginal
and the curve becomes asymptotic in nature, which indicates maximum stabilization
of organic matter of wastewater within the above reaction period. Figure 3 demonstrates that there is a steady ascending in MLSS concentration up to a time period of
22 h, from initial MLSS concentration 2025 mg/L. After 22 h, the rate of increase
Fig. 2 COD removal profile during carbon oxidation study in batch reactor for simulated wastewater
sample [Initial COD concentration = 1352.16 mg/L]