PMID- 33383477
OWN - NLM
STAT- MEDLINE
DCOM- 20210209
LR  - 20210209
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 281
DP  - 2021 Mar 1
TI  - Comparison of acoustic and hydrodynamic cavitation based hybrid AOPs for COD 
      reduction of commercial effluent from CETP.
PG  - 111792
LID - S0301-4797(20)31717-5 [pii]
LID - 10.1016/j.jenvman.2020.111792 [doi]
AB  - The present work investigates the treatment of commercial effluent obtained from 
      Common Effluent Treatment Plants (CETP) using acoustic cavitation (AC) and 
      hydrodynamic cavitation (HC) based hybrid AOPs. Comparison of different hybrid 
      AOPs viz. H(2)O(2), Fe(2+)/H(2)O(2), Fe(2+)/H(2)O(2)/Air, 
      Fe(2+)/H(2)O(2)/S(2)O(8)(2-) and Fe(2+)/H(2)O(2)/S(2)O(8)(2-)/Air in combination 
      with both AC and HC has been performed in terms of extent of chemical oxygen 
      demand (COD) reduction and kinetic rate constants. The best results of COD 
      reduction as 95.2% and 97.28% were obtained for AC/Fe(2+)/H(2)O(2)/Air and 
      HC/Fe(2+)/H(2)O(2)/Air systems respectively at Fe(2+)/H(2)O(2) ratio of 0.1 and 
      pH of 2 within 60 min of treatment under conditions of ultrasonic power 
      dissipation as 150 W, inlet pressure for HC as 4 bar (as applicable depending on 
      process) and temperature of 30 +/- 2  degrees C. Slightly lower efficacy was established 
      for the combination approach involving AC or HC coupled with Fe(2+)-activated 
      S(2)O(8)(2-) and H(2)O(2) yielding COD reduction of 82.9% and 86.93% for the 
      AC/Fe(2+)/H(2)O(2)/S(2)O(8)(2-)/Air and HC/Fe(2+)/H(2)O(2)/S(2)O(8)(2-)/Air 
      systems respectively at Fe(2+)/H(2)O(2)/S(2)O(8)(2-) ratio of 1:40:17.5. Cost 
      estimation on the basis of cavitational yield performed on the AC and HC based 
      treatment systems revealed economical nature of HC based treatment. Kinetic 
      studies were also performed by fitting the experimental data with pseudo first 
      order kinetic model (PFOKM), generalized kinetic model (GKM) and 
      Behnajady-Modirshahla-Ghanbery kinetic model (BMGKM). It was demonstrated that 
      GKM provided best fitting for all the experiments whereas BMGKM was most suitable 
      for Fenton based reactions. It was clearly established that complex CETP effluent 
      can be effectively treated using the combined approaches based on HC with 
      potential for larger scale operation.
CI  - Copyright (c) 2020 Elsevier Ltd. All rights reserved.
FAU - Agarkoti, Chandrodai
AU  - Agarkoti C
AD  - Department of Chemical Engineering, Institute of Chemical Technology, Matunga, 
      Mumbai, 40019, India.
FAU - Gogate, Parag R
AU  - Gogate PR
AD  - Department of Chemical Engineering, Institute of Chemical Technology, Matunga, 
      Mumbai, 40019, India. Electronic address: pr.gogate@ictmumbai.edu.in.
FAU - Pandit, Aniruddha B
AU  - Pandit AB
AD  - Department of Chemical Engineering, Institute of Chemical Technology, Matunga, 
      Mumbai, 40019, India.
LA  - eng
PT  - Journal Article
DEP - 20201229
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Water Pollutants, Chemical)
RN  - BBX060AN9V (Hydrogen Peroxide)
SB  - IM
MH  - Acoustics
MH  - Biological Oxygen Demand Analysis
MH  - *Hydrodynamics
MH  - Hydrogen Peroxide
MH  - Kinetics
MH  - Oxidation-Reduction
MH  - *Water Pollutants, Chemical
OTO - NOTNLM
OT  - Acoustic cavitation
OT  - Advanced oxidation processes (AOPs)
OT  - CETP textile effluent
OT  - Hybrid treatment processes
OT  - Hydrodynamic cavitation
OT  - Kinetic model
EDAT- 2021/01/01 06:00
MHDA- 2021/02/10 06:00
CRDT- 2020/12/31 20:15
PHST- 2020/05/16 00:00 [received]
PHST- 2020/11/13 00:00 [revised]
PHST- 2020/12/02 00:00 [accepted]
PHST- 2021/01/01 06:00 [pubmed]
PHST- 2021/02/10 06:00 [medline]
PHST- 2020/12/31 20:15 [entrez]
AID - S0301-4797(20)31717-5 [pii]
AID - 10.1016/j.jenvman.2020.111792 [doi]
PST - ppublish
SO  - J Environ Manage. 2021 Mar 1;281:111792. doi: 10.1016/j.jenvman.2020.111792. Epub 
      2020 Dec 29.