PMID- 30741612
OWN - NLM
STAT- MEDLINE
DCOM- 20200727
LR  - 20200727
IS  - 1479-487X (Electronic)
IS  - 0959-3330 (Linking)
VI  - 41
IP  - 20
DP  - 2020 Aug
TI  - Development of modified airlift reactor (MALR) for improving oxygen transfer: 
      optimize design and operation condition using 'design of experiment' methodology.
PG  - 2670-2682
LID - 10.1080/09593330.2019.1579869 [doi]
AB  - Oxygen scarcity may significantly affect the process performance since it has low 
      aqueous solubility and high demand by chemical and biological processes. The 
      oxygen mass transfer is therefore necessary to enhance. This work aimed to 
      develop the gas-liquid reactor, named Modified Airlift Reactor (MALR) for 
      improving the oxygen transfer efficiency in terms of internal configurations and 
      aeration parameters by equipping a vertical baffle for creating liquid 
      circulation phenomena, and installing slanted baffles in the reactor riser to 
      extend air-bubbles retention time and to improve their distributions. Since 
      extremum conditions of the investigated factors may inefficient, optimum levels 
      are required to identify. 2 (k) factorial and response surface design of Design 
      of Experiment (DOE) methodology were applied to optimize these complex variables 
      in terms of overall liquid mass transfer coefficient (K (L) a) of clean water. As 
      a result, the main effective factors of MALR with their optimum value are amount 
      of baffles (N (b)  approximately  3 baffles), baffle angle (alpha  approximately  50 degrees ), position of base area (Y 
      (r)  approximately  10 cm), open space on baffle (A (s)  approximately  90 cm(2)), and gas flow (Qg). 
      Increasing Qg resulted better K (L) a for the studied ranges (2-18 LPM). At the 
      optimum condition, the improvement of MALR in terms of K (L) a coefficient was 
      increased up to 97% and 28% compared to the regular bubble column and airlift 
      reactor, respectively, at a certain gas flow without any extra energy. The 
      correlation models of K (L) a coefficient with significant variables and power 
      consumption were constructed for future estimation purposes.
FAU - Bun, Saret
AU  - Bun S
AUID- ORCID: 0000-0003-1846-3989
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
AD  - Department of Rural Engineering, Institut de Technologie du Cambodge, Phnom Penh, 
      Cambodia.
FAU - Wongwailikhit, Kritchart
AU  - Wongwailikhit K
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
AD  - INSA, UPS, INPT; LISBP, Universite de Toulouse, Toulouse, France.
FAU - Chawaloesphonsiya, Nattawin
AU  - Chawaloesphonsiya N
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
FAU - Lohwacharin, Jenyuk
AU  - Lohwacharin J
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
FAU - Ham, Phaly
AU  - Ham P
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
AD  - Department of Rural Engineering, Institut de Technologie du Cambodge, Phnom Penh, 
      Cambodia.
FAU - Painmanakul, Pisut
AU  - Painmanakul P
AD  - Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn 
      University, Bangkok, Thailand.
AD  - Centre of Excellence of Environmental and Hazardous Waste Management, 
      Chulalongkorn University, Bangkok, Thailand.
LA  - eng
PT  - Journal Article
DEP - 20190217
PL  - England
TA  - Environ Technol
JT  - Environmental technology
JID - 9884939
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - *Bioreactors
MH  - *Oxygen
OTO - NOTNLM
OT  - K L a coefficient
OT  - 2 k factorial design
OT  - airlift reactor
OT  - design of experiment
OT  - optimization
OT  - response surface design
EDAT- 2019/02/12 06:00
MHDA- 2020/07/28 06:00
CRDT- 2019/02/12 06:00
PHST- 2019/02/12 06:00 [pubmed]
PHST- 2020/07/28 06:00 [medline]
PHST- 2019/02/12 06:00 [entrez]
AID - 10.1080/09593330.2019.1579869 [doi]
PST - ppublish
SO  - Environ Technol. 2020 Aug;41(20):2670-2682. doi: 10.1080/09593330.2019.1579869. 
      Epub 2019 Feb 17.