Environmental Engineering Reference
In-Depth Information
rigorous scientific inquiry. The greatness of the past and present will frame the future. So the aim and mission towards a better
and congenial human society is ushering in hope and insightful destiny.
13.7
APPlicAtiOn Of A BuBBle cOlumn reActOr And visiOn Of innOvAtive ideAs
The bubble column reactor is a visionary tool for its application in AOPs. Challenges lie ahead in the integration of nanofiltra-
tion and the bubble column reactor. Excellent heat and mass transfer characteristics urges the scientific community to declare
it as a challenging and visionary tool. The world of environmental engineering and the domain of wastewater treatment will
usher in a new era with the application of bubble column reactor.
Bubble column reactors are intensively used as multiphase reactors and contactors in the chemical, biological, and pharma-
ceutical domains. They provide several advantages during operation and maintenance such as high heat and mass transfer char-
acteristics, compactness, and low operating and maintenance costs. Three-phase bubble column reactors are widely used in
chemical reaction engineering, that is, in the presence of catalysts, and also in biochemical applications where microorganisms
are utilized as solid suspensions in order to manufacture industrially valuable bioproducts. Investigation of design parameters
characterizing the operation and transport phenomena of bubble columns has led to a better understanding of hydrodynamic
properties, heat and mass transfer characteristics, and flow regime mechanisms at work during the operation. The review [35]
also targets and focuses on bubble column reactors, their description, design and operation, application areas, fluid dynamics,
and regime analysis encountered.
The application of bubble column reactors has had a tremendous impact in recent years in the field of environmental engi-
neering. The world of unknown in the areas of AOPs and nanofiltration will open up new windows of innovation and intuition
in the years to come. Bubble column reactors have new applications with regard to AOPs. The vision is clear-cut with the fron-
tiers of environmental science and engineering expanding to unprecedented levels. The grit and determination of the scientist's
vision is inspiring and immense. The common man's problems in the field of desalination will mostly be solved by the science
of nanofiltration. Research areas will slowly grow to visionary proportions.
13.8 dOctrine Of HeAt And mAss trAnsfer cHArActeristics Of A BuBBle
cOlumn reActOr
Heat and mass transfer predictabilities are the major targets of the operation of bubble column reactor. Theoretically, a scien-
tist's vision is toward better operation and maintenance of this visionary tool. The aim is to achieve better hydrodynamics as
well as better reactivity, heat, and mass transfer.
13.9
dOctrine Of HydrOdynAmics Of BuBBle cOlumn reActOr And multiPHAse flOW
The importance of hydrodynamics of bubble column and the associated regime of multiphase flow is targeted toward efficient
reactivity and linked to heat and mass transfer characteristics.
Bubble column reactors belong to the general class of multiphase reactors that include mainly three categories, that is, trickle
bed reactors (fixed or packed bed), fluidized bed reactor, and bubble column reactor [36-39].
13.10
Hidden trutH in tHe dOmAin Of envirOnmentAl engineering And nAnOfiltrAtiOn
Hurdles and unsurpassed barriers shapes the future and the scientific rigor is a vibrant witness. The greatness of environmental
engineering tools are unraveled and the human society aims at a sustainable future. The loeb-Sourirajan model has revolution-
ized the entire field of membrane science. Principles of membrane science have been established through scientific research.
newer and novel methods of water treatment and desalination are shaping and reshaping scientific intuition. Environmental
engineering will usher in a new dawn in science and technology. The backbone of this unending scientific endeavor is strict and
stringent environmental regulations. Developed and developing nations are gearing up toward new challenges to embrace the
far-reaching environmental engineering frontier.
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