DESC:FIELD OF INVENTION
[001] The present invention relates to an air purification system. Particularly, the present invention relates to a system and method of self-sustaining air purification system utilizing a three layered self-sustaining filtration technology.

BACKGROUND OF THE INVENTION
[002] Rapid urbanization has led to the constant evolution of cities, which has led to drastic changes in the living conditions within the cities. Construction works are now considered a criterion for the city's development and has left us void of nature and the green ecosystem around us. This resulted in an ecosystem null of nature and the greenery around us, leading to several environmental issues. Air pollution is one such pressing issue that is continuously breaking new records for the number of unhealthy days in most cities.

[003] A WHO air quality model confirms that 99% of the world's population lives in places where air quality levels exceed WHO limits. Nearly 4.2 million deaths yearly are due to exposure to outdoor air pollution. The conventional solutions for air-filtration rely upon a heavy suction system that pushes the air out of a mechanical filter arrangement, mostly HEPA and activated charcoal. The conventional systems require frequent replacement of the filters, and applications are limited to indoor air spaces. Further, another major problem faced by the existing purification system to operate in semi-open spaces is the increased air volume and uncertain air-flow pattern, which demands a heavy suction system coupled with massive power consumption leading to infeasible design and increased electricity consumption. Thus outdoor and semi-open air quality control remains a big void in technological advancements.

[004] The existing air-purification technologies mostly rely on a stack of HEPA based mechanical filtration, charcoal filtration, etc. These filtration techniques require a fan-based suction system to channel airflow in and out of these systems. The application of these air-filtration techniques leads to the following critical limitations:
? increased power consumption due to heavy suction systems which in turn increases with the size of the coverage area;
? regular replacement of the unsustainable filter media;
? disposal of unsustainable filters in the landfills thereby leading to soil & water pollution; and
? increment in noise and size of the system along with the coverage area
[005] The indoor air-pollution problems had some conventional solutions based on mechanical filtration like HEPA & PCO techniques but with the rise of sustainable and holistic plant-based air-purification systems, indoor air quality control seems to be in a promising phase. It is for the semi-open and open spaces wherein air pollution control is a big challenge owing to colossal air volume, unpredictable airflow patterns and huge recurring costs associated with mechanical filtration systems.

[006] This disadvantages and limitations of the existing technology are summarized herein:
? Urban air is contaminated with pollutants and disease causing microorganisms and their removal requires intensive energy use and is limited as air needs to be funneled through filter systems.
? Unavailability of ‘sustainable solutions’ to effectively tackle the severe levels of PM particles, TVOCs, Gaseous pollutants (NOx, SOx etc.) & microbial contaminants in indoor and outdoor spaces.
? Unavailability of ‘effective air purification system’ for large outdoor and semi-open spaces with a huge volume of polluted air interaction.’
? Unavailability of ‘energy efficient’ air-purification systems to cater effectively to the huge air-volume of the semi-open spaces such as airports, metro stations, corridors etc.
? Unavailability of ‘modular arrangement’ of the air-purification system which can be scaled easily utilizing the mounting space of the walls.
? Unavailability of ‘self-sustaining air purification technologies’ that needs not be taken care on frequent basis for effective air purification

[007] Therefore, in view of the problem associated with the state of the art there is a need for air filtration system capable of controlling the air-quality of the semi-open spaces where air volume is huge, air-infiltration is prominent and pollutant load is very unpredictable.

OBJECTIVES OF THE INVENTION
[008] The primary objective of the present invention is to provide a self-sustaining wall mounted air purification system.

[009] Another objective of the present invention is to utilize ‘Rain Shower Technology’ for stimulating the phenomenon of the rain shower for removing air pollutants and microbial contaminants with minimal energy requirements.

[0010] Yet another objective of the present invention is to provide ‘The Seaweed filter’ for purifying the air from the severe levels of PM particles, TVOC and Gaseous pollutants (NOx, SOx etc.) in indoor and outdoor spaces through surface adsorption and absorption.

[0011] Another objective of the present invention is to provide an Urban Tunnel Effect to leverage the fluid flow phenomenon through design and strategic placements of the vents to improve the suction of the system without increasing the power consumption of the suction system.

[0012] Another objective of the present invention is to provide a modular design for the air-purification system to be mounted on the wall and scaled accordingly.

[0013] Yet another objective of the present invention is to provide an effective air purification system for large outdoor and semi-open spaces having large polluted air interaction range.

[0014] Other objects and advantages of the present invention will become apparent from the following description taken in connection with the accompanying drawings, wherein, by way of illustration and example, the aspects of the present invention are disclosed.
SUMMARY OF THE INVENTION
[0015] The present invention relates to a self-sustaining wall mounted air purification system having modules/layers which are stacked together and mounted on the wall to purify large air-volume. The air-purification method of the system of present invention is a combination of three layered purification systems i.e., bio-filtration; rain shower technology and sea-weed filter for purifying the contaminated air.
BRIEF DESCRIPTION OF DRAWINGS
[0016] An understanding of the present invention may be obtained by reference to the accompanying drawings, when taken in conjunction with the description herein and in which:

[0017] Figure 1 illustrates schematic arrangement of the suction & filtration system arrangement;

[0018] Figure 2 illustrates schematic arrangement of the outlet , soil-mix & AQI monitor arrangement;

[0019] Figure 3 illustrates the flowchart describing the working of self-sustaining wall mounted air purification system.

[0020] Figure 4 illustrates module with primary, trigger inlet, ion-splasher, rain shower arrangements and various key elements of the systems;

[0021] Figure 5 illustrates velocity gradient depicting velocity increase near the center cross section region due to Urban Tunnel Effect; and

[0022] Figure 6 illustrates the design and the dimension of the module.

DETAILED DESCRIPTION OF THE INVENTION
[0023] The following description describes various features and functions of the disclosed system with reference to the accompanying figures. In the figures, similar symbols identify similar components, unless context dictates otherwise. The illustrative aspects described herein are not meant to be limiting. It may be readily understood that certain aspects of the disclosed system can be arranged and combined in a wide variety of different configurations, all of which have not been contemplated herein.

[0024] Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0025] Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
[0026] The terms and words used in the following description are not limited to the bibliographical meanings, but, are merely used to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustrative purpose only and not for the purpose of limiting the invention.

[0027] It is to be understood that the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise.

[0028] It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. The equations used in the specification are only for computation purpose.

[0029] The present invention relates to a self-sustaining air purification system in the form of modules which are stacked together and mounted on the wall to cater to the large air-volume. The air-purification method of the system of present invention is an innovative sustainable development also known as bio-filtration. The bio-filtration is a plant's phytoremediation capabilities coupled with ‘Rain Shower Technology’. The rain shower technology impersonates the wet deposition phenomenon that occurs during rainfall which has been proven to reduce suspended pollutants in the air. This is further supported by a novel self-regenerating filter made of sodium alginate, this filter does not require replacement and is also sustainable in development and usage.

[0030] Thus, through modular design incorporating the three sustainable stacks of filters the developed air-purification system can be easily used effectively in outdoor, semi-open, and indoor spaces due to the availability of huge exposed surface areas. These modular wall mounted purification systems are easily customizable as per the requirements and aesthetics.

[0031] As shown in Figure 1 and Figure 2, air purification system of the present invention employs the following filtration mechanisms:

? first layer: Bio-filter utilizing breathing roots technology for purification of air in the first cycle;
? second layer: Water curtain utilizing rain shower technology for purification of air in the second layer;
? third layer: Self-regenerating surface absorbing filter hereby known as ‘The Seaweed filter’ made of sodium alginate for purifying the contaminated air.

[0032] Bio-Filter Layer (Plant layer): The first layer forms the initial stage of the purification system. It utilizes living plants to remove pollutants from the air while reducing the need for constant replacements. The plants can thrive and perform their pollutant removal function indefinitely with proper care and maintenance, such as with regular watering and light.

[0033] Rain Shower (Water Droplet Filter): The second layer of the filtration system comprises a rain shower/ water droplet filter that operates through the wet deposition phenomenon, effectively capturing and removing airborne pollutants. The collected water from this process is repurposed for irrigation, enhancing sustainability by minimizing water waste. Since the filter primarily relies on the continuous cycle of water droplets, it doesn't require replacements and can operate in a closed-loop system.

[0034] Self-regenerating Sea-Weed Filter: The third layer of the purification system employs a seaweed filter that traps pollutants in nanoholes on its surface. This filter is designed to be regenerative, which implies that this layer has self-cleaning properties, and it continues to function effectively without needing replacement. Additionally, the filter is made from seaweed extract, a renewable and eco-friendly material that contributes to its long-term sustainability.

[0035] The air-purification system of the present invention comprises the following characteristics:
? Modular: The system is developed in the form of small units that are joined together and scaled for variable volume of air or for variable size of the sweeping area. Each single unit is defined as a module, each module has been designed with specific size, flow rate (cfm), energy consumption, number of plants and arrangements to be joined with next modules either horizontally or vertically.
? Wall Mounted: The modules integrated with the stacks of sustainable filters are wall mounted to utilize its maximum space and improve the efficacy of the air-purification system for the semi-open spaces. Through this the area available for the air purification system fitments increases to many-folds which is not possible in conventional floor/table-top indoor air-purification systems.
? Sustainable Filtration Stacks: The first layer is of the bio-filters comprising ‘Breathing Roots Technology’. Phytoremediation is the phenomenon, through which plants can degrade the pollutants (PM, TVOCs, Gaseous pollutants) through the leaf and plant root zone. Since the plant’s roots contribute to 90% of the pollution degradation and only 10% of the pollution cleaning happens through leafs, the breathing roots technology increases the breathability of the soil-root zone and increases the volume of air getting into the root zone, thus increasing overall efficacy of the phytoremediation. The plant’s through photosynthesis also improves the oxygen levels and controls the carbon dioxide levels.

[0036] The process of filtration is done by mimicking the showers of the rainfall and passing the air through it. It has been always observed that on rainy days, most of the air's common air pollutants and pollen are washed away, helping to improve the air quality. This phenomenon is called Wet deposition. There are two main parameters that govern the wet deposition capabilities of the rain: a) Size of the droplets and b) Charges present in the droplets.

[0037] Size of the droplets: In the present invention an optimized size of droplets is achieved giving the maximum effectiveness in the wet deposition capabilities. As the smaller the size of the droplet greater will be its surface area to dissolve the particles in itself.

[0038] Charges present in the droplet: In the present invention several experiments and numerical analysis were conducted to determine a balance of positive and negative charge that the droplets should be fed with in-order to form the free [H+] and [O2-] ions from the droplets and the air. These free ions in the droplets help in increasing the coagulation capacity of the droplets for removing the particles. The gases are absorbed by the charged droplets and broken down into simpler and non-harmful gases.

[0039] Accordingly, the purification system of the present invention comprises the following components:
[0040] 1. Suction System (Axial Fans)
The chassis contains axial fans mounted inside the chassis, forming the suction system. These fans are responsible for drawing in ambient foul air from the environment through a primary inlet.
a. Primary Inlet: Positioned at the front face of the chassis, the primary inlet serves as the entry point for polluted air. The axial fans pull in the polluted air through this inlet.
b. Trigger Inlets: Located on the top surface of the chassis, the trigger inlets create a region of lower pressure inside the chassis.
This design enhances air intake through the primary inlet, optimizing the purification process.

[0041] 2. A Filtration Module, comprising:
[0042] (a) A First filtration Layer/ Biofiltration Layer: layer, the bio-filter, is mounted on the front face of a chassis near its primary inlets. It consists of plants and a specially designed pot. Polluted air passing through the primary inlet first interacts with the bio-filter, utilizing Breathing Roots Technology to remove pollutants.

[0043] (b) Second Filtration Layer - Water Curtain module with ‘Rain Shower Technology’ is achieved by facilitating the above phenomenon inside the module. The second filtration layer is fully embedded within the chassis. The second layer comprises a plurality of interconnected components as follows:
(i) Water Reservoir: The module comprises at least one water reservoir present at the bottom of the module. A submersible pump is configured in the water reservoir.
(ii) Sump with Equidistant Holes: A sump is provided in the upper portion of the module, that serves as an intermediary water reservoir. Within the sump, there are two layers of holes horizontally placed at equal intervals. These holes are designed to convert the water in the sump into water droplets and allow the water to drip through the sump.
(iii) Circulation mechanism: A pipe, mounted inside the chassis, configured with a plurality of array of holes that distribute water droplets. These water droplets are then collected in a water tank equipped with a submersible pump.
(iv) A plurality of washers, as shown in Figure 5, is mounted on the holes of the pipe to break down falling water into droplets. This collected water is subsequently circulated back into the sump by the submersible pump. The circulation of water inside the module creates a rain shower within the module.
[0044] Fig 6 shows a schematic view of the sump according to exemplary embodiment of the present invention. A series of holes with washers are carved horizontally in a single row in the pipe mounted on a sump. The pipe continuously receives water through the submersible pump from the water reservoir/ collecting tank. The sump has two adjacent layers of equidistant holes placed horizontally keeping the diameter of the washer equal to the required droplet diameter. The holes in the sump are carefully sized to optimize the formation of water droplets. The size of these water droplets is crucial because it influences the maintenance of charges and the attraction of pollutant particles. In an embodiment of the present invention,
[0045] The second Layer, i.e. a biofiltration layer is arranged such that the water curtain is parallel to the biofiltration layer. The whole arrangement of water shower is kept across the air-flow after the bio-filtration layer at 90 degree. When polluted air is drawn into the module, it first interacts with a bio-filter. After this initial interaction, the air comes into contact with the descending water droplets due to the force of gravity. This interaction occurs perpendicular to the surface created by the series of water droplets.

[0046] (3)Ion Generation Unit: An ion-generating system is placed inside the chassis in a strategic position such that it emits the ions and charges the rain drops with a balance of positive and negative ions. The charge carrying droplets falls vertically across the air flow path and coagulates with the suspended particles to absorb the harmful gases/pollutants. The drops with the dissolved pollutants are collected in the collecting tank and the water is fed again to the pipe for the rain-shower. This unit releases ions into the water curtain, enhancing the effectiveness of the charged water droplets in capturing pollutants.

[0047] (4) Sensing Components:
[0048] (a) Sensors: A plurality of sensors, as shown in Figure 4, are housed inside the chassis within a waterproof box. The sensors continuously monitor environmental conditions, such as humidity, temperature, particulate matter, CO2, CO, and TVOCs levels, contributing to air quality assessment.
A plurality of sensors may be selected from one or more of the following:
1. Humidity & Temperature Sensor: To measure relative humidity & ambient temperature
2. Particle sensor: To measure particulate matters present in the drawn in air
3. CO2 & CO sensor: To measure the ppm of CO2 & and CO in the drawn in air
4. TVOCs sensor: To measure the ppb of the Volatile organic compounds in the drawn in air.
The Sensors are mounted on a PCB which is connected through a micro-controller. This acts as a small electrical module powered through main power supply.
[0049] In an embodiment of the present invention, the data of various sensors may be displayed on any display unit not particularly limited, however, may be selected from a display device, a graphical user Interface (GUI). Further, adjustment mechanisms may be provided in the system to vary parameters like temperature and flow of shower curtain.

[0050] (b) A Light Dependent Resistor (LDR)/Light Emitting Unit:- A light unit may be positioned on the top surface of the chassis to provide light for growth of the plants. Any grow light such as a light bulb may be configured at an angle adjusted so that the light may be projected evenlg.sy across the plant leaves in biophilia section. In an embodiment of the present invention, an LDR may also be provided on top surface of the chassis for provision of light for plant’s growth and development. LDR is an electronic component whose electrical resistance changes in response to the amount of light it is exposed to. In other words, the LDR is a sensor that detects the level of light in its surroundings. When exposed to more light, the resistance of an LDR decreases, and when exposed to less light, the resistance increases. The system of the present invention uses LDR to sense the light levels in the environment, and based on their readings, it activates the corresponding grow lights to provide plants with the right amount of light for their well-being and growth. This ensures that the plants receive consistent and appropriate lighting conditions, even when natural light is insufficient. The angle of the LDR is carefully adjusted to project light evenly across the plant leaves in the biophilia section.

[0051] (c) Water Level Monitoring System:
The water level monitoring system utilizes reed float switches, which float inside the water tank. These switches provide real-time data about the water levels in the collecting tank, ensuring a continuous water supply for the water curtain and the overall system.

[0052] The final filtration layer is of the ‘Self-regenerating’ surface absorbing filter hereby known as ‘The Seaweed filter’. The filter is developed using the components:
1. Sodium Alginate (CAS: 9005-38-3);
2. Double deionized water (milliQ water)
3. D-(+)-Glucose (CAS number 50-99-7, = 99.5% w/w)
4. Calciumiodate /calcium chloride)
5. Silica (Silicon di-oxide) CAS Number:7631-86-9; and
6. Sodium Bicarbonate.

[0053] In an exemplary embodiment of the present invention, the self-generating filter composition comprises:
1. Sodium Alginate (CAS: 9005-38-3) 50 to 70 wt%;
2. Double deionized water (milliQ water )_10 to 30 wt%
3. Cross linker in the range of 0.5 to 2 wt%:
4. Calcium salt in the range of 0.5 to 5 wt%;
5. Silica in the range of 5 to 15 wt%; and (Silicon di-oxide) CAS Number:7631-86-9
6. Sodium Bicarbonate in the range of 2 to 8 wt% of the total weight of the composition.
[0054] In an embodiment, the calcium salt is selected from the group of calcium iodate or calcium chloride.
[0055] In an embodiment, crosslinker is Cross D-(+)-Glucose (CAS number 50-99-7, = 99.5% w/w).

[0056] In an exemplary embodiment, the composition of the present invention is prepared by the following steps:
1.prepaing a beaker with a magnetic stirrer;
2.adding 14.46 gm to 76.96 gm of double deionized water (milliQ water) to the beaker;
3. slowly sprinkling 0.00926 to 0.02315 moles of Sodium Alginate into the water while stirring continuously to prevent clumping and continued stirring until it is fully dissolved;
4.adding 0.00278 moles to 0.011 moles of D-(+)-Glucose /crosslinker to the solution and stir until it dissolves completely.
5. dissolving a specified amount of Calcium salt(0.0900 moles to 0.2703 moles of calcium chloride OR 0.0769 moles to 0.0256 moles calcium iodate), in a separate container in a small amount of water to form a clear solution, and gradually adding the calcium salt solution to the beaker while stirring continuously. This will cause gelation and the formation of calcium alginate.
6. slowly adding 83.20 moles to 116.48 moles of Silica (SiO2) to the mixture while stirring to ensure even distribution. Continue stirring for about 30 minutes to disperse the silica evenly.
7.Lastly, add 0.238 moles to 1.190 moles of Sodium Bicarbonate to the mixture to adjust the pH to promote cross-linking of the sodium alginate.
8. Stirring the mixture for an additional 30 minutes to ensure thorough mixing and dispersion of all components.
9. pouring the resulting slurry into round molds or desired filter shapes.
10. placing the molds on a heating plate and maintain a temperature of 70-80°C for 1 hour to promote gelation and cross-linking of the filter material.
11. allowing the granules to cool and solidify after the heating step; and
12. removing the solidified filter material from the molds and assembling it in a mesh arrangement as a filter bed in the path of the air flow.
[0057] In an exemplary embodiment, the composition is prepared by mixing the components Sodium Alginate: Double deionized water: D-(+)-Glucose: Calcium Chloride : Silica: Sodium Bicarbonate in in a molar ratio of: 0.00278: 1.388: 0.00555: 0.00900 (for CaCl2) : 0.131 : 0.0595.

[0058] In another exemplary embodiment, the composition is prepared by mixing the components Sodium Alginate: Double deionized water: D-(+)-Glucose: Calcium Iodate: Silica: Sodium Bicarbonate in in a molar ratio of 0.00278: 1.388: 0.00555: 0.00256: 0.131: 0.0595.
[0059] The following illustrates exemplary embodiments for preparation of the self-regenerating filter composition and should not construed to be limiting to the scope of the present invention.
Example 1:
[0060] The porous material has the capacity to adsorb and absorb particulate matters and gases. They are synthesized by mixing vigorously 25 mL of milliQ water with 0.6 gram of sodium alginate derived from the alginic acid, as a gelling agent and adding 1 gram of calcium iodate (or calcium chloride) to the solution and mixing it in the magnetic stirrer for 1 hour. 7.88 gram of silica fume (corresponding to 72% w/w of solid content) was added and finally 5 gram of sodium bicarbonate. The slurry was then put in round molds and warmed on a heating plate at 70–80?C for 1 hour. The achieved granules were mixed with Silica in a ratio of (30:1) and then filled in a mesh-arrangement and mounted as a bed in the path of the air flow, wherein the pollutants specifically PM particles and TVOCs are absorbed and adsorbed in the material. The property of this filter is that it is hydrophilic in nature thus it also absorbs the water content of the air (coming from the droplets) and regenerates itself regularly thus the pores never get clogged.
[0061] Working of the Invention: Figure 3 illustrates working, according to an embodiment of the present invention.

Step 1: Activation of the Suction System: - When the external power supply is activated, the axial fans mounted inside the chassis start drawing in polluted ambient air through the primary inlet holes.
Step 2: Filtration through the Layer of Filtration- Bio-Filter:- The incoming foul air encounters the bio-filter layer, consisting of plants and a specially designed pot. This bio-filter employs Breathing Roots Technology, which helps in removing pollutants from the air through the first layer interaction.
Step 3: Enhanced Air Intake:-To boost air intake, trigger inlets positioned at the top of the chassis create a region of relative low pressure, facilitating the inflow of more air from the primary inlet.
Step 4: Second Layer of Filtration - Rain Shower Technology-The drawn-in air reaches inside the chassis and interacts with Rain Shower Technology. This technology consists of two adjacent layers of charged droplets flowing from top to bottom. These droplets are charged using an ion generator.
Step 5: Water Collection and Release:- A collecting tank equipped with a submersible pump is utilized to convey water to a sump. From the sump, water droplets are released through nozzles, and gravity causes them to fall.
Step 6: Monitoring Water Levels- A water level sensor, connected to LEDs, monitors and displays the current water levels in the tank.
Step 7: Third Layer of Filtration - Regenerative Sea-Weed Filter- The third layer employs the seaweed filter to trap pollutants in nanoholes on its surface. This filter is designed to be regenerative, meaning thereby, it can clean itself and continue to function effectively without needing replacement. Additionally, the filter is made from seaweed extract, a renewable and eco-friendly material that contributes to its long-term sustainability.

[0062] The present invention can remove all prominent air-pollutants and hence can tackle air pollution in an enhanced and more effective way with all sustainable arrangements:
? Self-Sustaining: The modular purification system is self-sustaining in nature. Once implemented and attached to the power supply the system takes care of itself autonomously. The sensors after checking the humidity level in the roots triggers the irrigation system, the water used from the collecting tank is fed through a drip irrigation system to all the plants. The grow light attached with each module gets ON as per the LDR (Light dependent resistor) response and hence the plants always get ample amount of light for their health and growth. The filtration layer integrated with the modules are all sustainable and need not to be replaced after usage. The water level sensor senses the level of the water in the collecting tank and activates the alarm for the replenishing the tanks. To summarize, sustainability and non-replacement of these filter layers are achieved through each layer's inherent characteristics and design. The bio-filter relies on the resilience of plants, the rain shower filter reuses water, and the seaweed filter is both regenerative and uses sustainable materials, all contributing to their long-lasting and environmentally friendly operation.
? Advanced Air-flow design: The module has been developed to provide air the least resistance path towards the area of interest thus facilitating the less flow losses around plant root and water shower area. The air combination of air-inlets facilitate more flow rate without additional power consumption. Figure 1 and 4 illustrates that the module comprises two pairs of inlets for extracting foul air: a) Primary inlet- They are small holes of particular diameter placed around the plant pot on the front surface; b) Trigger inlet- They are small holes of particular diameter placed on the center of the module at the top surface. On the activation of the suction system the foul air is extracted from the front and top holes. Since the trigger holes are less in number, the volume of air passing through the trigger inlet is very less as compared to the primary inlet. Since air enters through the small holes, to conserve the volume its velocity increases after the inlet. This air-flow pattern discussed herein helps in extracting more foul air through the power consumption unit known as Urban Tunnel Effect as shown in Figure 4. The air with high velocity passes adjacent to the air coming from the primary inlet having relatively low velocity. The relative change in the velocity occurs due to high flow losses occurring due to friction and bend in the path at the plant pot region. Now because of the velocity difference the higher velocity air from the trigger inlet starts drawing the lower velocity air because of surface no-slip. This effect draws the inlet air towards itself thereby facilitating more air-volume inside the primary inlet. There also lies a region of relative vacuum between the air passing through the primary inlet and the trigger inlet, which further causes the air coming from the primary inlet to fill up those voids thus resulting in more air being drawn from the primary inlet.
? Biophilic Design: The Biophilia is attached behind the modules through plants, water drops, and sustainable material apart. This Biophilic structure apart from reducing C02 levels and improving Oxygen levels has added advantages like:
1. Reduce development's carbon footprint
2. Regulating the temperature of building
3. Regulating the humidity of the building
4. Improved health
5. Increased mood and feeling of well-being
6. Improved productivity
7. Increased employee engagement
8. Reduced stress levels
9. Mental restoration & reduced fatigue
[0063] The advantages of the present invention includes:
? The air-purification system of the present invention has modular design comprising three stacks of filters to be used effectively in outdoor, semi-open, and indoor spaces due to the availability of huge exposed surface areas; and
? There are numerous researches backing NASA's study of plants species cleaning ability of the pollutants. The phenomenon known as Phytoremediation, through which plants can degrade the pollutants (PM, TVOCs, Gaseous pollutants) through the leaf and plant root zone. Since the plant’s roots contribute to 90% of the pollution degradation and only 10% of the pollution cleaning happens through leafs, therefore, the ‘Breathing roots’ increases the breathability of the soil-root zone and increases the volume of air getting into the root zone, thus increasing overall efficacy of the phytoremediation.

[0064] While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is 10 intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
,CLAIMS:WE CLAIM:
1. A self-sustaining air purification system, comprising:
? a suction system;
? a filtration module comprising a first biofiltration layer, a second water curtain layer and a third self-regenerating sea-weed layer;
? an ion-generation unit;
? a plurality of sensing components;
? a light emitting unit; and
? a water level monitoring unit

2. The air purification system as claimed in claim 1, wherein the suction system comprises:
? a primary inlet positioned at the front face of the chassis, to serve as the entry point for polluted air; and
? a trigger inlet located on top surface of the chassis to create low pressure inside the chassis.

3. The air purification system as claimed in claim 1, wherein the filtration module comprises:
? a chassis for installing at least three layers of filtration mechanisms;
? a first layer consisting of a bio-filter mounted on the front face of a chassis near its primary inlets;
? a second layer stacked over the first layer and embedded within the chassis comprising a water curtain, wherein the second layer further comprises:
o At least one water reservoir configured with a submersible pump;
o at least one sump comprising two layers of equidistant holes placed horizontally;
o a pipe mounted on the sump comprising a series of holes arranged horizontally on the pipe;
o a plurality of washers mounted on the plurality of holes; and
o a circulation mechanism for circulation of water.
? a third layer stacked over the second layer comprising a self-regenerating surface absorbing filter.

4. The air purification system as claimed in claim 1, wherein the system is a wall mounted system comprising at least one purification unit.

5. The air purification system as claimed in claim 1, wherein the plurality of sensors is selected from, but not limited to, humidity & temperature sensor, particle sensor, CO2 & CO sensor, and TVOCs sensor.

6. The air purification system as claimed in claim 1 or 3, wherein the self-regenerating sea-weed filter comprises a composition consisting of:
i. Sodium Alginate (CAS: 9005-38-3) 50 to 70 wt%;
ii. Double deionized water (milliQ water)_10 to 30 wt%
iii. Cross linker in the range of 0.5 to 2 wt%:
iv. Calcium salt in the range of 0.5 to 5 wt%;
v. Silica in the range of 5 to 15 wt%; and (Silicon di-oxide) CAS Number:7631-86-9
vi. Sodium Bicarbonate in the range of 2 to 8 wt% of the total weight of the composition.
7. The air purification system as claimed in claim 5, wherein the crosslinker is Cross D-(+)-Glucose (CAS number 50-99-7, = 99.5% w/w).

8. The air purification system as claimed in claim 5, wherein the calcium salt is selected from calcium chloride or calcium Iodate.
9. The air purification system as claimed in claims 1 to 6, wherein the self-regenerating sea-weed layer of the present invention is prepared by the steps consisting of:
i. prepaing a beaker with a magnetic stirrer;
ii. adding a specified amount of double deionized water (milliQ water) to the beaker;
iii. slowly sprinkling a specified amount of Sodium Alginate into the water while stirring continuously to prevent clumping and continued stirring until it is fully dissolved;
iv. adding a specified amount of D-(+)-Glucose /crosslinker to the solution and stir until it dissolves completely.
v. dissolving a specified amount of Calcium salt in a separate container in a small amount of water to form a clear solution, and gradually adding the calcium salt solution to the beaker while stirring continuously. This will cause gelation and the formation of calcium alginate.
vi. slowly adding a specified amount of Silica (SiO2) to the mixture while stirring to ensure even distribution. Continue stirring for about 30 minutes to disperse the silica evenly.
vii. adding the specified amount of Sodium Bicarbonate to the mixture to adjust the pH to promote cross-linking of the sodium alginate.
viii. stirring the mixture for an additional 30 minutes to ensure thorough mixing and dispersion of all components.
ix. pouring the resulting slurry into round molds or desired filter shapes.
x. placing the molds on a heating plate and maintain a temperature of 70-80°C for 1 hour to promote gelation and cross-linking of the filter material.
xi. allowing the granules to cool and solidify after the heating step; and
xii. removing the solidified filter material from the molds and assembling it in a mesh arrangement as a filter bed in the path of the air flow.

10. A method of purification of air pollutants using the self-sustaining purification system as claimed in claim 1, the method comprising the steps of:
I. activating suction System by activating the external power supply to draw in polluted ambient air through the primary inlet holes by axial fans mounted inside the chassis;
II. activating the ion generating system by external power supply to release high discharge of ion.
III. passing the incoming foul air through the bio-filter layer to remove pollutants from the air through the first layer interaction;
IV. enhancing the air Intake by the trigger inlets positioned at the top of the chassis by creating a region of relative low pressure, facilitating the inflow of more air from the primary inlet;
V. passing the air of step II through second filtration layer consisting of two adjacent layers of charged droplets flowing from top to bottom;
VI. monitoring water Levels using a water level sensor, connected to LEDs, monitors and displaying the current water levels in the tank on a user’s interface;
VII. passing the air from the second later through the third regenerative Sea-Weed to trap pollutants in nanoholes on its surface to obtain purified layer.