342
B. Chakraborty et al.
Fig. 1 Experimental setup of suspended growth batch reactor
2.4 Experimental Setup and Procedure for the Treatment
of Wastewater in Batch Reactor
Batch kinetic studies for the treatment of stimulated bakery and confectionery
wastewater for carbon oxidation and nitrification have been performed in 1 L volume
measuring cylinder separately as shown in Fig. 1. After seed acclimatization, about
800 mL volume of sample was taken in each cylinder with necessary diluted feed
solution. Each cylinder was facilitated with aeration system by inserting stone sparger
fitted with laboratory-scale compressor. The graduation marked in the cylinder helped
for determining sludge volume for each cylinder in more convenient manner.
3 Results and Discussion
3.1 Characterization of Real-Life Bakery and Confectionery
Wastewater
The wastewater samples as characterized in the laboratory with respect to the
following parameters are shown in Table 2. The COD and NH 4
+ –N values were
found within a range of 1350 ± 30 and 65 ± 10 mg/L, respectively. The average
pH and TSS of real-life composite sample wastewater were found to be 7.4 ± 0.2
and 550 ± 30 mg/L, respectively. The temperature during collection of sample was
observed in the range of 25–32 °C. As regards to the high TDS value, the reason can be
B. Chakraborty et al.
Fig. 1 Experimental setup of suspended growth batch reactor
2.4 Experimental Setup and Procedure for the Treatment
of Wastewater in Batch Reactor
Batch kinetic studies for the treatment of stimulated bakery and confectionery
wastewater for carbon oxidation and nitrification have been performed in 1 L volume
measuring cylinder separately as shown in Fig. 1. After seed acclimatization, about
800 mL volume of sample was taken in each cylinder with necessary diluted feed
solution. Each cylinder was facilitated with aeration system by inserting stone sparger
fitted with laboratory-scale compressor. The graduation marked in the cylinder helped
for determining sludge volume for each cylinder in more convenient manner.
3 Results and Discussion
3.1 Characterization of Real-Life Bakery and Confectionery
Wastewater
The wastewater samples as characterized in the laboratory with respect to the
following parameters are shown in Table 2. The COD and NH 4
+ –N values were
found within a range of 1350 ± 30 and 65 ± 10 mg/L, respectively. The average
pH and TSS of real-life composite sample wastewater were found to be 7.4 ± 0.2
and 550 ± 30 mg/L, respectively. The temperature during collection of sample was
observed in the range of 25–32 °C. As regards to the high TDS value, the reason can be