P r o f . Y . H . O z a
R e t d . P r o f . ,
D e p a r t m e n t O f E n v i r o n m e n t a l E n g i n e e r i n g ,
L . D . C o l l e g e O f E n g i n e e r i n g , A h m e d a b a d .
Advance Methods for Waste
Management for smart city or
smart town planning
I. Liquid (Waste Water): Advance treatments used for
liquid waste are applied after primary, secondary and
tertiary treatment or after primary and secondary or
after primary treatment as per requirement.
A few advance can be listed as under:
− Advance Oxidation (removal of OC)
Fenton Reaction (H2O2 + FeSO4)
. Evaporation (MEP), Incineration
Industrial effluent have inorganic and organic salt
It recovers organic solvent
Waste water converted into solid mass which easily handle
Step 1:- It is known as stripper. It recovered low boiling
Step 2:- waste water converted into slurry
Step 3:- slurry converted into solid waste by dryer
It is force circulation type of system which prevent scaling.
Axial flow pump is important in the system
Axial pump working with high capacity and low power
In design fluid dynamics play important role
Plasma is a electrically neutral medium of unbounded positive and negative
Plasma is fourth state of matter, it is hot ionised gas consisting of approx. equal
number of positive charged ions and negative charged electrons
Characteristic of plasma is different then ordinary gas system
Plasma is classified in thermal plasma and non-thermal plasma
These plasma technique is used and resultant in energy which afterward utilized in
Incineration is a waste treatment process that
involves the combustion of organic substances
contained in waste materials.
Incineration and other high-temperature waste
treatment systems are described as "thermal
Incineration of waste materials converts the waste
into ash, flue gas and heat.
Hydro Cavity Treatment
Cavitation is a specific phenomenon in a liquid if any
changes occur in the pressure field over time and
The effects of cavitation have become very useful in
supporting chemical processes in the environmental
protection technologies, especially in technologies
related to the decomposition of substances particularly
harmful to humans and his immediate surroundings.
Cavitation can be realized by alterations in the flow and
pressure (hydrodynamic cavitation).
In hydrodynamic cavitation, flow geometry is changed in
such a way that the kinetic energy increases at the
expense of local liquid pressure, which can make cavities
depending on the vapor pressure of the liquid.
Traditional treatment methods do not always
produce the expected results.
There exists a certain group of organic non-
biodegradable pollutants, having toxic, mutagenic, or
In the current literature there are many studies
related to hydrodynamic cavitation and the use of
associated processes in water and effluent treatment