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BANYI DISINFECTANT ROBOT
The aim of the present work is to contribute in the fight against the spread of Covid-19, a novel human coronavirus, in hospitals, public transport, airlines, and any enclosed areas. In this study, we have adopted the physical disinfection method by using UVC light and also with Organic Chemical Sprayer as agent.
Our finding shows that a mobile robot is the most efficient device to inactivate microorganisms, so we have developed a robot called BANYI Robot named by Mr. Ho Kai Huat, Singapore my Ex Boss, My Good Friend and My God Father.
The SARS-CoV-2 responsible for the disease known as Covid-19 is a virus that is mostly transmitted through aerosols. The pandemic has recently emerged from China with a total of 83.021 confirmed cases of pneumonia around the world (as of June 2, 2020) (www.worldometers.info/coronavirus/). To reduce the pandemic spread of the virus, five measures have been adopted: (1) massive testing, (2) quarantine, (3) disinfection, (4) social distancing, and (5) sanitary measures. The disinfection techniques are of chemical and/or physical type (Otto et al. 2011). The effectiveness of a disinfection plan depends on the environmental factors such as temperature, relative humidity, organic load, pH, surface topography, water hardness, or the presence of other chemicals compounds (Otto et al. 2011; Mojarad et al. 2017; Darnella et al. 2004). In fact, the agents used in a chemical disinfection procedure are classified according their nature: (1) acids: acetic acid and citric acid; (2) alcohols: ethanol and isopropanol; (3) aldehydes: formaldehyde and gluteraldehyde; (4) alkalis: sodium or ammonium hydroxide, sodium carbonate, and calcium oxide; (5) biguanides: chlorhexidine; (6) halogens: chlorine or iodine compounds; (7) oxidizing agents; and (8) quaternary ammonium compounds. The chemical disinfection of microorganisms refers to the application of a chemical agent at known concentration C. The disinfection phenomenon is a kinetic process described mathematically for the first time by the well-known Chick-Watson model since 1908. The basic rate model of disinfection is described according to the following equation (Chick 1908):
where N is the number of microorganisms after time t and k is the observed disinfection rate constant. Several authors (Hom 1972; Lambert and Johnston 2000; Prokop and Humphrey 1970) have refined the Chick-Watson model by taking account other parameters involved in the disinfection process. Disinfectant concentration and contact time are integral to disinfection kinetics and the practical application of the Ct concept (Ct being the disinfectant concentration multiplied by the contact time). The physical disinfection methods are UV light treatment (Guridi et al. 2019), gamma irradiation treatment (Silindir and Özer 2009), and heat treatment of virus (Sauerbrei and Wutzler 2009). In fact, since 2004, Darnell et al. have examined several methods to inactivate the coronavirus. In this study, the authors have reported that the coronavirus was inactivated by UVC (254 nm), or at a temperature higher than or equal to 65 °C, alkaline (pH > 12) or acidic (pH < 3) conditions, and formalin and glutaraldehyde treatments.
When UVC is used as a disinfection technique, Equation (1) takes the following form (Kamiko and Ohgaki 1989):
where I (μW/cm2) and Z (cm2/μWs) are respectively the UV intensity and the microorganism susceptibility factor. The susceptibility parameters vary with environmental conditions, such as relative humidity (RH) (Ko et al. 2000; McDevitt et al. 2012). It is known that UVC effectiveness decreases with increasing RH (McDevitt et al. 2012). The UVC effectiveness for microorganisms is correlated also to room configuration, lamp placement, lamp age, air movement patterns, and by the mixing degree of room air. The dose relates, D (μJ/cm2), to the UV intensity according Equation (3):
D=It
where t (s) is the irradiation time.
The D90 is the required UVC dose for 90% inactivation of a microorganism. The SARS-CoV-2 is of about 120 nm in diameter. Its inactivation dose corresponds to D90 = 6.11 μJ/cm2 (Jingwen et al. 2020). The virus is highly susceptible to UVC irradiation and its susceptibility is 3 times greater than the influenza (common cold) virus. The dose received by surface unity at given distance r (cm) from the sanitizer depends on the power, P (μW), of the emitted UVC lamp according to the following equation (Owens et al. 2005):
where L (cm) and t (s) are, respectively, the length of the lamp and the exposure time, so the exposure time can be estimated according Equation (5):
In order to express the relative number of living microorganisms that are inactivated, the log 10 reduction factor is calculated according the following equation (Mazzola et al. 2003):
where N0 and N are respectively the number of microorganisms before and after exposure to UV light, so when the log 10 reduction takes the values 1, 2, 3, and 4, the percent reduced microorganisms is respectively 90%, 99%, 99.9%, and 99.99%.
The medical frameworks are on the front lines of the battle against coronavirus, so the hospitals must be disinfected efficiently and quickly. In this context, the UVC technique is recommended by the scientist community to win the war against the Covid-19 pandemic. In this work, we will firstly present and discuss the different devices using UVC disinfection. Then, we will expose a prototype disinfection robot developed by Addison Institute`s sister concern SG Robotics.
A contribution of SG Tamila`s and Addison Institute`s R&D Division named SGRobotics.com research and engineering to the world war against Covid-19 pandemic has been presented in this report. The study of different disinfectant systems led us to identify our choice on the development of a mobile disinfection robot. The Banyi Robot is an autonomous device and can be controlled manually. It can also work in a fully automated mode. The lamps integrated into the robot and its mobility can deactivate coronavirus and microorganisms in a record time. Based on artificial intelligence, integrated sensors, and cameras, the device is of high security. Banyi Robot shuts down when humans are around to protect them from the harmful effects of UVC
Category :
Desktop AppsClient :
CobrasoftwaresDate :
19th Jun, 2025Link :
www.thambi.ai
Challenge
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Solution
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The Results
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Opportunities while benefiting those with out access to financial services
Opportunities while benefiting those with out access to financial services