Kinetics Study of a Suspended Growth
System for Biological Treatment
of Bakery and Confectionery Wastewater
Biswajit Chakraborty, Pradyut Kundu, Joydeep Mukherjee,
and Somnath Mukherjee
Abstract The effluent of bakery and confectionery production unit mainly contaminated with oil, fat, nitrogen, glucose, starch, etc. These industries use plentiful water
for proper functioning and operating of the production unit and simultaneously it
emanates a huge amount of wastewater. A laboratory investigation was undertaken
to explore the feasibility of biodegradation of bakery and confectionery wastewater
along with kinetic study. The experimental studies were done with simulated real-life
bakery and confectionery wastewater in batch-fed reactor. Necessary characterization was done after collecting wastewater from the outlet of the real-life plant. It was
found that COD value was within a range of 1300–1400 mg/L and BOD/COD ratio
between 0.68 and 0.71. The microbial seed was acclimatized for 3 months. Necessary
batch kinetic studies were performed with preacclimatized seed mixture in different
proportions to the simulated sample. It was noticed that about 90% removal of COD
could be achieved after a contact period of 26 h in corresponding to 1320 mg/L
of the initial COD concentration. Similarly, 76% ammoniacal nitrogen (NH 4
+ –N)
removal was also found with respect to initial NH 4
+ –N concentration of 75.38 mg/L
after a contact period of 30 h. Finally, experimental dataset was utilized to determine
various kinetic coefficients such as K, Y, k d , K s for designing a real-life activated
sludge reactor system for the treatment of bakery and confectionery wastewater.
B. Chakraborty · J. Mukherjee
School of Environmental Studies, Jadavpur University, Kolkata 700032, India
e-mail: chakrabortyjit007@gmail.com
J. Mukherjee
e-mail: joydeep.mukherjee@jadavpuruniversity.in; joydeep_envstu@school.jdvu.ac.in
P. Kundu
Department of Food Processing Technology, Mirmadan Mohanlal Government Polytechnic,
Plassey, Nadia, West Bengal 741156, India
e-mail: kundupradyut@yahoo.co.in
S. Mukherjee (B)
Environmental Engineering Division, Civil Engineering Department, Jadavpur University,
Kolkata 700032, India
e-mail: mukherjeesomnath19@gmail.com
© Springer Nature Singapore Pte Ltd. 2021
D. Ramkrishna et al. (eds.), Advances in Bioprocess Engineering and Technology,
Lecture Notes in Bioengineering,
https://doi.org/10.1007/978-981-15-7409-2_34
339
System for Biological Treatment
of Bakery and Confectionery Wastewater
Biswajit Chakraborty, Pradyut Kundu, Joydeep Mukherjee,
and Somnath Mukherjee
Abstract The effluent of bakery and confectionery production unit mainly contaminated with oil, fat, nitrogen, glucose, starch, etc. These industries use plentiful water
for proper functioning and operating of the production unit and simultaneously it
emanates a huge amount of wastewater. A laboratory investigation was undertaken
to explore the feasibility of biodegradation of bakery and confectionery wastewater
along with kinetic study. The experimental studies were done with simulated real-life
bakery and confectionery wastewater in batch-fed reactor. Necessary characterization was done after collecting wastewater from the outlet of the real-life plant. It was
found that COD value was within a range of 1300–1400 mg/L and BOD/COD ratio
between 0.68 and 0.71. The microbial seed was acclimatized for 3 months. Necessary
batch kinetic studies were performed with preacclimatized seed mixture in different
proportions to the simulated sample. It was noticed that about 90% removal of COD
could be achieved after a contact period of 26 h in corresponding to 1320 mg/L
of the initial COD concentration. Similarly, 76% ammoniacal nitrogen (NH 4
+ –N)
removal was also found with respect to initial NH 4
+ –N concentration of 75.38 mg/L
after a contact period of 30 h. Finally, experimental dataset was utilized to determine
various kinetic coefficients such as K, Y, k d , K s for designing a real-life activated
sludge reactor system for the treatment of bakery and confectionery wastewater.
B. Chakraborty · J. Mukherjee
School of Environmental Studies, Jadavpur University, Kolkata 700032, India
e-mail: chakrabortyjit007@gmail.com
J. Mukherjee
e-mail: joydeep.mukherjee@jadavpuruniversity.in; joydeep_envstu@school.jdvu.ac.in
P. Kundu
Department of Food Processing Technology, Mirmadan Mohanlal Government Polytechnic,
Plassey, Nadia, West Bengal 741156, India
e-mail: kundupradyut@yahoo.co.in
S. Mukherjee (B)
Environmental Engineering Division, Civil Engineering Department, Jadavpur University,
Kolkata 700032, India
e-mail: mukherjeesomnath19@gmail.com
© Springer Nature Singapore Pte Ltd. 2021
D. Ramkrishna et al. (eds.), Advances in Bioprocess Engineering and Technology,
Lecture Notes in Bioengineering,
https://doi.org/10.1007/978-981-15-7409-2_34
339