Influence of Carbon-activated Foam to Gain Fresh Water Production
on Ultrasonic Vibration Assisted Water Purification System
I D. G. Agustriputra
1
1
a
, P. Wijaya Sunu
1b
, I N. Suamir
1c
, Wayan Nata Septiadi
2d
,
I Gede Santosa
1
e
, I M. Suarta
1
f
, I W. Temaja
1
g
and I Nym Sugiartha
1
h
1
Jurusan Teknik Mesin, Politeknik Negeri Bali, Kampus Bukit Jimbaran, Kuta Selatan, Badung-Bali, Indonesia
2
Jurusan Teknik Mesin, Universitas Udayana, Kampus Bukit Jimbaran, Kuta Selatan, Badung-Bali, Indonesia
Keywords: Water Purification, Ultrasonic Vibration, Carbon Activated Foam, Filter.
Abstract: Increasing demand for freshwater has been necessary for the development of the urban community. Saline
water is one of the problems for urban society in coastal areas. Separation techniques to distilled water from
saline water were performed by using many different kinds of systems. In recent years, many kinds of
technology had been developed to convert saline water into freshwater with various methods and apparatus.
Ultrasonic atomization is one of the methods to generate very narrow water droplets on atmospheric pressure
and ambient temperature. This project has experimented to observe the performance of new technology within
the water purification process from saline water and it’s assisted by an ultrasonic humidifier for the
humidification process. It has been performed a miniature technology which utilized a commercial ultrasonic
humidifier with a power rating of 10 watts and resonance frequency 0f 1,65 MHz. Utilization of carbon-
activated foam had been conducted to gain the performance of the humidification and dehumidification
process. This work had been also analysed the measurement of the production of freshwater by its quality and
quantity. The quality of the freshwater has been indicated by total dissolved solids (TDS) or salt
concentrations of the output of this technology and also the number of output freshwater flow rates as their
quantity. It has been measured about 2750-2850 ppm and the rate of freshwater production about 60-86 ml/h
by a single unit of ultrasonic humidifier. It also indicated that influence of carbon activated foam to gain water
output rate.
1 INTRODUCTION
Utilization and demand of freshwater studied for
both present and past for the future demand
projection. Commonly, water is utilized for
agricultural, domestic and industrial, hydroelectric
power and other water uses. Freshwater is a part of
life and our life necessities. There are two main
problems for sustainable fresh water supply for
domestically purposed, scarcity of fresh water and
a
https://orcid.org/0000-0002-9422-7876
b
https://orcid.org/0000-0002-6915-0475
c
https://orcid.org/0000-0003-0594-7511
d
https://orcid.org/0000-0003-3121-9542
e
https://orcid.org/0000-0001-5445-804X
f
https://orcid.org/0000-0001-5715-7170
g
https://orcid.org/0000-0001-9010-8426
h
https://orcid.org/0000-0003-0924-4418
increasing demand for freshwater. The world's water
consumption is enormous and spread across various
applications and industries. The biggest problem
faced developing the technology of freshwater
production that is the maintenance costs of
equipment. Freshwater is generally characterized by
concentrations of dissolved salts and other total
dissolved solids. Indonesia is an archipelago that has
a large amount of seawater. Different kinds of
systems in separation technique to distilled water
from saline water/seawater were performed by
462
Agustriputra, I., Sunu, P., Suamir, I., Septiadi, W., Santosa, I., Suarta, I., Temaja, I. and Sugiartha, I.
Influence of Carbon-activated Foam to Gain Fresh Water Production on Ultrasonic Vibration Assisted Water Purification System.
DOI: 10.5220/0010947600003260
In Proceedings of the 4th International Conference on Applied Science and Technology on Engineering Science (iCAST-ES 2021), pages 462-469
ISBN: 978-989-758-615-6; ISSN: 2975-8246
Copyright
c
 2023 by SCITEPRESS – Science and Technology Publications, Lda. Under CC license (CC BY-NC-ND 4.0)

several technologies (Shehata et al. 2019). One of the
methodologies is humidification and
dehumidification (HDH) for the distillation of saline
water.
Many researchers designed HDH to reduce
power
consumption or increase the use of free
renewable
energy (Shehata et al. 2019)(Rahimi-Ahar,
Hatamipour, and Ahar 2020)(Dumka, Jain, and
Mishra 2020)(El-Said and Abdelaziz 2020). In line
with this technology development, various design and
capacity becomes an important parameter for
sustainable technology and appropriated by the user
in several communities.(Agustriputra et al. 2021).
This research has been proposed a humidification
and dehumidification system which utilized an
ultrasonic piezo’s vibrations to generate mist from
saline water. Carbon activated foam has been utilized
in the humidification and dehumidification process to
gain the output of fresh water in this system. Carbon
activated is prevalent material that occupies in water
purification technology.
2 LITERATURE REVIEW
2.1 Ultrasonic Vibration for Liquid
Atomization
One of the atomization processes applied an
ultrasonic vibration produced by a piezoelectric disc.
Unlike traditional atomization, ultrasonic atomization
of liquid uses solely electrical energy, which is
delivered to a piezoelectrically vibrating disk. There
are no moving parts, only mechanical vibrations
generated by the supplied electrical energy to use in
the generation of the droplets. The ejection of small
droplets from a liquid film formation on an
ultrasonically vibrating surface known as an
ultrasonic atomization. This is mixed by two major
conventions, namely, the capillary wave hypothesis
and the cavitation hypothesis have been proposed to
explain the ejection of droplets from a vibrating
surface. (Spotar et al. 2015) The capillary wave
hypothesis considers the production of a capillary
wave consisting of peaks and troughs on a vibrating
surface, which can’t be observed visually. The
cavitation theory proposes that cavitation, which has
defined as the creation of cavities in the liquid film on
the piezo electric’s vibrating surface. these is
responsible for droplet generation. A cavitation event
around the vibration of piezoelectric disk expels
directly from collapse the droplets of these bubbles,
especially near the superficial. (El-Said and
Abdelaziz 2020) (Yasuda et al. 2010) (Khmelev et al.
2017)
The cavitation theory proposes that cavitation,
which is defined as the creation of cavities in the
liquid film on the piezo electric disc vibrating surface.
A cavitation event around the oscillating piezoelectric
disk expels directly from the droplets the collapse of
these bubbles, especially near the surface. (Kudo et
al. 2017). Because the droplets produced are fast and
small in size, often only a few micrometers in
diameter, ultrasonic atomization has been used in a
wide variety of applications. the most widely used for
commercial application are humidifiers for home
appliance. Ultrasonic humidifiers have been used in
air conditioning systems, and these are commonly
used in subtropical areas for household appliances
and cold chains for fresh fruit and vegetables. The
formation of a very fine mist can also be applied in
the fumigation of fresh food or the sanitization of food
service equipment.
The mist generated by acoustic atomization has a
very large surface area per unit volume of solution,
due to the small diameter of the droplets. Series of
experiments were performed to analyses the influence
of physical parameters such as temperature, carrier gas
flow, and position of mist collection on the enrichment
of ethanol distillation. Besides, droplet size
measurements of the atomized mists and visualization
of the oscillating fountain jet formed during
ultrasound application were utilized to understand the
separation mechanism. However, the
level of
concentrations that can be achieved is limited by the
rate of mass transfer of generated mist through the
liquid to the surface of the droplets as their form.
(Zhang, Yuan, and Wang 2021)(Hamai et al. 2009).
So far, there is no convention in the literature about
the actual mechanism which is responsible for
ultrasonic atomization. Cavity evidence has been
reported only in situations where the forcing
acceleration is very high, such as in the horn atomizer.
On the other hand, no evidence of cavitation was
reported in the case of ultrasonic atomization
occurring on the surface of the vibrating piezoelectric
disc.
A desalination plant is a technology for the
separation of freshwater from saline water. The
amount of salt will be removed by the distillation
process or other similar separation processes. Solar
still is common technology from a conventional
method. This technology had been developed
significantly by various research and methods cause
of the utilization of solar thermal energy which has
been free energy. (Rahbar, Esfahani, and Asadi
2016),(Shehata et al., 2020). The utilization of
ultrasonic atomization becomes favourable
Influence of Carbon-activated Foam to Gain Fresh Water Production on Ultrasonic Vibration Assisted Water Purification System
463

technology in recent years for application in several
fields such as room air humidification, aroma
diffuser, reduce air solid contaminant, and
nanoparticle synthesis. An easy operation is one of
the advantages of ultrasonic atomization and is
maintenance-free. An ultrasonic atomization process
utilized more efficient electric energy, generating
mist by mechanical vibrations supplied by ultrasonic
frequency of electrical power. (Putra et al. 2020)
2.2 Adsorption to Desalinate of Saline
Water
One of the most popular methods in water
purification has been used an activated carbon
material as an adsorbent. In an aqueous solution,
adsorption of an activated carbon involves three
interactions: first interactions are adsorbate to liquid,
second interactions are adsorbate and surface area,
and third interactions are liquids to adsorbate. The
strength of physical adsorption to surface contacts
indicates degree of adsorption in absorbent materials,
as opposed to adsorbate to liquid and liquid to surface
interactions. The chemical properties of the surface
determine adsorbate to surface interactions, whereas
the solubility of the adsorbent material determines
adsorbate to liquid interactions. Surface chemistry
determines the interactions of liquids with the
adsorbate's surface area. (Bowen 1969)
There are several types of activated carbon, most
notably granular form of an activated carbon,
extruded activated carbon, and there are also many
uses of powdered activated carbon. they are not
limited to water treatment and gas purification, but
it’s also needed for several adsorption process. Only
certain materials can be adjusted in the industry as
required, such as high tensile strength, tolerance of
high temperature, derived from Activated Carbon
Fiber (ACF) or cellulosic fibre which was made from
natural and synthetic material.
Activated carbon has various uses, most notably
water purification, gas purification and conservation,
medical use, heavy metal release, and energy saving
devices. (Marsh and Rodríguez-Reinoso 2006).
Especially, carbon activated foam was used to gas and
water purification. A composite fibre has been
manufactured by inserting of carbon activated for gas
and water filtration. It applied to gas and water
purification technology. Synthetic mesoporous
carbon also required to an easy tuneable pore size and
improving others mechanical properties. It’s just
Activated carbon has many uses, mainly due to its
adjustable pore size, better quality and durability, as
well as its thermal properties and large surface area.
The most common and used materials for commercial
activated carbon production include various animal
residues, pitches, coke, which affect their recycling
and economic potential. Various reports indicate that
activated carbon production affects production
efficiency. Many researchers have reviewed and
explored various methods for producing activated
carbon, including production methods, physical
activation, chemical activation, physiochemical
activation, and energy conservation.(Paul et al. 2019)
Solar desalination already has taken valuable
place
in brackish or desalination process. Various water
desalination processes have been being operated
with the help of solar thermal energy (Li et
al. 2013).
The current solar desalination systems still
have
relatively high capital cost, low proficiency and
productivity and dependency on location, weather
and season which make it uncompetitive with the
others desalination technology. However, solar
desalination is a feasible choice for the arid region
with a minimum water demands for developing
countries, due to the elimination the cost of the water
transportation and cost of energy source. The most
practical renewable desalination technique could be
solar distillation which is a simply natural
evaporation–condensation process with a low-cost
energy source.
3 EXPERIMENTAL APARATUS
AND METHODS
In this project, we perform ultrasonically
experiments to observe the atomization of saline
water in the humidification process at vibration
frequency of 1.65 MHz. This provides insight into the
dynamics of ultrasonic atomization. we were looking
into whether we consider examining ‘ultrasonic
humidifier’ presumably as an evaporation (or
humidification) process in part of this technology. An
ultrasonic transducer occupied as a mechanical work
through vibrations to generate the mist or water
fountain on the circulation of the air as a carrier gas.
Our analysis is based on the cavitation wave
mechanism by ultrasonic vibrations module that
generates water mist in a chamber. Recent works,
such as the use of ultrasonic atomization on solar still
technology, separation of ethanol from water
solutions, and other similar work to increase
humidification processes via ultrasonic atomization,
have considered this decision. (Shehata et al. 2019)
(Dumka and Mishra 2020) (Shehata et al. 2020). This
experimental study also conducts to analyse the
iCAST-ES 2021 - International Conference on Applied Science and Technology on Engineering Science
464

production of fresh water and reduced the total
dissolved solids of saline water. it utilized a portable
ultrasonic humidifier module to formed water mist
which is in the humidification chamber. The
thickness of saline water layer and mass flow rate of
the air will be an important parameter on installation
of ultrasonic humidifier.
1. Saline water container 5. DC blower 5015
2. Ultrasonic humidifier module 6. Activated Carbon Foam
(dehumidification)
3. Circulation gas carrier 7. Fresh water reservoir
4. Activated Carbon Foam 8. Fresh water out conduit
(first Stage)
Figure 1: Schematic of experimental apparatus.
3.1 Material and Equipment
A commercially available mist-maker or ultrasonic
humidifier (also known as a nebulizer) was used to
carry out the experiments. The resonant
frequency of
the disc is about 1.65 MHz with a
ceramic piezo
electric disc, which is diameter of 20 mm and power
rating of about 10-15 W. An acrylic
material was
utilized for designing and constructing two chambers
on this prototype technology. A DC blower unit
(type 5015) serves to circulate air as a
carrier gas
into the dehumidification chamber. A PWM module
was applied to the speed controller of the blower unit.
(Figure 1). DC power supply used to
supply electrical
power for ultrasonic generator (24 volts) and blower.
Carbon activated foam was utilized to adsorb of
total dissolved liquid of salt in the saline water. This
is typically a synthetic fiber that has been
manufactured by the amount of powdered activated
carbon. There are two parts of carbon-activated foam
in the installation of this experimental apparatus. In
the humidification chamber, 4 cm of activated foam
thickness were installed. It purposed to reduce the
number of salts at the first stage of condensation. This
thickness of carbon-activated foam had been
determined by passing observable water mist. Then,
the influence of carbon activated foam thickness was
investigated by the thickness of about 1,2,3, and 4 cm
respectively. it aims to increase of condensation of
fresh water in the dehumidification chamber.
3.2 Experimental Setup
Dry air (carrier gas) is circulated in two chambers,
humidification and dehumidification, through the
inlet of the air blower. After ultrasonic atomization,
dry air mixed with air mist flows into the
dehumidification chamber through the dry air
temperature and relative humidity being measured.
(Figure 1)
Figure 2: Schematic of data measurement.
The effect of water layer thickness and mass flow
rate determines to humidity and air temperature of
carrier gas. Next procedure, the blower's rotation
speed was controlled by using of PWM module. 4
steps of the blower’s speed rotations were controlled
to indicate 4 set points of air mass flow rate. Several
sensors had been installed in the humidification and
dehumidification chamber (Figure 2 Schematic of
data measurement. 4 sensor bme 280 were installed to
measure the temperature of airflow on the chamber of
humidification and dehumidification technology. 2
Sensor ds18b20 has been used for the measure of
saline water and air temperature. The experiments
were conducted to evaluate the overall performance
of the application ultrasonic humidifier into a saline
Influence of Carbon-activated Foam to Gain Fresh Water Production on Ultrasonic Vibration Assisted Water Purification System
465

water purification system. (e.g., dry temperature,
relative humidity (RH), and Total Dissolved Solids
(TDS) on the output of freshwater. An Arduino
environment has been designed for an embedded
system on measuring system and collecting data of
this experiment. Arduino UNO R3 installed for
collecting and digital reading all sensors and
modules.
4 RESULT AND DISCUSSIONS
Firstly, measurement of the electric current
concluded with the ultrasonic humidifier module. this
measurement observes the limitations of saline water
layer thickness. it is indicated by the visible amount
of mist that had been generated as fountain fog.
Table 1: Electrical current supply to ultrasonic humidifier
module.
Saline Water
Electric Current
(Ampere)
3 0.42
3.5 0.42
4 0.42
4.5 0.42
5 0.43
5.5 0.43
6 0.43
According to electrical current measurement (Table
1 Electrical current supply to ultrasonic
humidifier
module), saline water limited to layer thickness and
air mass flow rate were considered by the gain of
electrical supply and fog formation. We
have
decided to the testing limit of saline water layer
thickness on 3 – 5 cm and also air mass flow rate
about 0,000093-0,000558kg/s, according to 4 set
points of PWM module. Saline Water layer thickness
influenced on increasing of electrical current up to
0,01 Ampere at thickness 4 to 5 cm water layer.
Based on the measured results, the absolute
humidity is determined by humidity ratio, relative
humidity, and partial pressure of water vapor could be
obtained by following equations:
𝜔 = 0,622𝜑/(𝑃
𝑏
− 𝑃
𝑠𝑤
𝜔)................... (1)
where 𝜔 is humidity ratio (kg/kg), φ is relative
humidity, P
b is atmospheric pressure (Pa), Psw is
partial pressure of water vapor (Pa), then it has been
determinated by dry air function (T);
ln P = C
1
/T + C
2
+ C
3
T + C
4
T
2
+ C
5
ln T ....... (2)
and coefficient of C
1
= -6069.9385; C
2
=
21.2409643; C
3
= 0.027111929; C
4
= 1.673952x 10-
5; and C
6
= 2.433502, which could be utilized to
describe the relationship between air temperature and
partial pressure of water vapor. Measurement of Total
Dissolved Solids utilized a digital salinometer and
also the number of productivities freshwater
measured by measuring cup and stopwatch. It is not
easy to configure the flow rate of freshwater out
Figure 1) by digital measurement because of low-
velocity flows.
Figure 3: Moisture content of humidification and
dehumidification process.
In this experiment, we have been collected data
relative humidity and dry air temperature from
sensors bme280 and then, data have been determined
for moisture content of dry air. Based on the
psychrometric of the air we calculate the flow rate of
the moisture content, Figure 3 shows the rise of
moisture content by gained of ultrasonic humidifier
on the chamber. On the higher limit of mass flow rate
increased their moisture content but lower mass flow
rate reduced moisture content of dry air on
humidification process. Humidification process have
been determined for effective limits of water layer
thickness about 4 – 4,5 cm and also air mass flow rate
about 0,000186kg/.
The temperature difference of carrier gas is the
deviation of dry air temperature between dry air
temperature in the outlet of dehumidification
chamber and temperature humid air on the humidifier
iCAST-ES 2021 - International Conference on Applied Science and Technology on Engineering Science
466

chamber. Figure 3 shows that almost all of the testing
is increased the temperature of dry air (carrier gas).
Electrical equipment produced heat which was
transferred to saline water on humidification and
dehumidification chamber. Increasing dry bulb
temperature had been held on 4,5 cm water layer
thickness and it’s maximized on 5 cm water layer
thickness. The Air mass flow rate of 0,000186kg/s
shows that the temperature deviation is higher
relatively than others air mass flow rates.
Figure 4: Dry bulb temperature difference.
Performance of saline water in humidification and
dehumidification process indicated by measurement
of freshwater output flow rate and reduction of salt
concentrations as the quality of freshwater
production. Measurement had been performed by 30
minutes of time interval and we have been observed
repetition for 10 times measurement. Based on
preliminary testing we have decided to adjusted the 4
cm thickness of the seawater layer on the surface of
the piezoelectric disc.
Seawater had been used to approach the total
dissolved solids of saline water. Seawater was
collected from Jimbaran beach in the Badung regency
Bali. Based on Figure 5, this prototype of the
humidification and dehumidification process could
be reduced the salt concentrations of saline water. It’s
normally, about 3500-3800 ppm which has been
reduced up to 2800 ppm of total dissolved solids on
freshwater outputs. This quality of the freshwater
output still shown higher limits for utilization
domestically. However, this experiment had been
proved that the utilization of ultrasonic modules and
carbon-activated foam can reduced salts or the total
dissolved solids or salinity in the seawater.
Figure 5: Fresh water output quality.
The flow rate of freshwater is about 60-86 ml/h.
(Figure 6). The influence of carbon-activated
foam
had been mentioned by increasing of output
fresh
water. Because of addition, carbon activated foam
thickness can increase compression of water
mist
in the dehumidification chamber. It also influences
the rate of water generated from the mist
stream in
carbon-activated foam. In the
humidification
chamber, we also use activated carbon to reduce the
salinity of mist generated by the
ultrasonic module.
Design considerations determined the thickness of
carbon activated foam which have
been installed in
the dehumidification chamber.
Based on the quality and quantity of fresh
water output, post-treatment of fresh water is needed
to meet the needs of fresh water for water
consumption. However, the development of this
technology is still promising for the use of free
renewable energy (Photo Voltaic system) and also a
sustainable supply of fresh water for coastal areas.
Low power rating of ultrasonic humidifier and DC
vortex blower is considerable choice in water
purification technology. The pressure difference
between the humidification and dehumidification
chambers and flow velocity of the carrier gas take
effect in increasing of freshwater productivity.
Influence of Carbon-activated Foam to Gain Fresh Water Production on Ultrasonic Vibration Assisted Water Purification System
467

Figure 6: Fresh water output quantity.
5 CONCLUSIONS
The utilization of ultrasonic vibration/ultrasonic
humidifier for humidification process had been tested
their performance experimentally. Their performance
had been also influenced by installing carbon-
activated foam in the humidification and
dehumidification process to gain freshwater output
quality and quantity. It had been reduced salinity up
to 2750 ppm from ordinary seawater and maximum
freshwater production is 86 ml/h.
ACKNOWLEDGEMENTS
The authors gratefully acknowledge Direktorat
Jenderal Pendidikan Tinggi, Kementerian
Pendidikan, Kebudayaan, Riset, dan Teknologi for
financial support by research grant no SP DIPA
023.17.1.690439/2021 revisi ke-04 tanggal 4 Juni
2021, and also Pusat Penelitian dan Pengabdian
Kepada Masyrakat (P3M) Politeknik Negeri Bali for
their technical and administrative assistance in
managing the project.
REFERENCES
Agustriputra, I. D. G., Putu Wijaya Sunu, Sudirman,
Nyoman Sugiartha, I. Wayan Temaja, and Wayan
Nata Septiadi. 2021. “Performance of Ultrasonic
Atomization on Mini Sea Water
Humidification and
Dehumidification Technology.” 169–77.
Bowen, J. F. 1969. Principles of Waste Water Treatment.
Vol. 2.
Dumka, Pankaj, Ananya Jain, and Dhananjay R. Mishra.
2020. “Energy, Exergy, and Economic Analysis of
Single Slope Conventional Solar Still Augmented with
an Ultrasonic Fogger and a Cotton Cloth.” Journal of
Energy Storage 30(April):101541.
El-Said, Emad M. S., and Gamal B. Abdelaziz. 2020.
“Experimental Investigation and Economic
Assessment of a Solar Still Performance Using High-
Frequency Ultrasound Waves Atomizer.” Journal of
Cleaner Production 256:120609.
Hamai, Koumei, Norimichi Takenaka, Ben Nanzai,
Kenji
Okitsu, Hiroshi Bandow, and Yasuaki
Maeda. 2009.
“Influence of Adding Salt on Ultrasonic Atomization
in an Ethanol-Water Solution.” Ultrasonics
Sonochemistry
16(1):150–54.
Khmelev, V. N., Shalunov, A. V., Golykh, R. N., Nesterov,
V. A., Dorovskikh, R. S., & Shalunova, A. V. (2017).
Providing the efficiency and dispersion characteristics
of aerosols in ultrasonic atomization. Journal of
Engineering Physics and Thermophysics, 90(4), 831-
844.
Kudo, T., Sekiguchi, K., Sankoda, K., Namiki, N., & Nii,
S. (2017). Effect of ultrasonic frequency on size
distributions of nanosized mist generated by ultrasonic
atomization. Ultrasonics sonochemistry, 37, 16-22.
Marsh, Harry, and Francisco Rodríguez-Reinoso. 2006.
Characterization of Activated Carbon.
Paul, Rajib, Mewin Vincent, Vinodkumar Etacheri, and Ajit
K. Roy. 2019. Carbon Nanotubes, Graphene, Porous
Carbon, and Hybrid Carbon-Based Materials:
Synthesis, Properties, and Functionalization for
Efficient Energy Storage. Elsevier Inc.
Putra, I. D. G. A. T., P. W. Sunu, I. W. Temaja, N. Sugiartha,
I. M. Sugina, and I. W. Suirya. 2020. “Investigation on
Application of Ultrasonic Humidifier for Air
Conditioning System.” Journal of Physics: Conference
Series 1450(1).
Rahbar, Nader, Javad Abolfazli Esfahani, and AminAsadi.
2016. “An Experimental Investigation on Productivity
and Performance of a New Improved Design Portable
Asymmetrical Solar Still Utilizing Thermoelectric
Modules.” Energy Conversion and Management
118:55– 62.
Rahimi-Ahar, Zohreh, Mohammad Sadegh Hatamipour,
and Leile Rahimi Ahar. 2020. “Air Humidification-
Dehumidification Process for Desalination:A Review”
Progress in Energy and Combustion Science 80.
Shehata, Ali I., A. E. Kabeel, Mohamed M. Khairat
Dawood, Mohamed M. Abo Elazm, Abdalla M. Abdalla,
and Ahmed Mehanna. 2019. “Achievement of
Humidification and Dehumidification Desalination
System by Utilizing a Hot Water Sprayer and
Ultrasound Waves Techniques.” Energy Conversion
and Management 201(October):112142.
iCAST-ES 2021 - International Conference on Applied Science and Technology on Engineering Science
468

Shehata, Ali I., A. E. Kabeel, Mohamed M. Khairat
Dawood, Aly M. Elharidi, A. Abd_Elsalam, Khaled
Ramzy, and Ahmed Mehanna. 2020. “Enhancement
of the Productivity for Single Solar Still with
Ultrasonic Humidifier
Combined with Evacuated Solar
Collector: An Experimental Study.” Energy
Conversion and Management 208(February):112592.
Spotar, Sergey, Asad Rahman, Ooi Chel Gee, Kon Kee
Jun, and Sivakumar Manickam. 2015. “A Revisit to the
Separation of a Binary Mixture of Ethanol-Water Using
Ultrasonic Distillation as a Separation Process.”
Chemical Engineering
and Processing: Process
Intensification 87:45– 50.
Yasuda, N., Yamamura, K., & Mori, Y. H. (2010).
Impingement of liquid jets at atmospheric and elevated
pressures: an observational study using paired water
jets or water and methylcyclohexane jets. Proceedings
of the Royal Society A: Mathematical, Physical and
Engineering Sciences, 466(2124), 3501-3526.
Zhang, Yu, Songmei Yuan, and Lizhi Wang. 2021.
“Investigation of Capillary Wave, Cavitation and
Droplet Diameter Distribution during
Ultrasonic
Atomization.” Experimental
Thermal and Fluid
Science 120(March 2020):110219.
Influence of Carbon-activated Foam to Gain Fresh Water Production on Ultrasonic Vibration Assisted Water Purification System
469