Spray Circular for Disinfecting Surfaces and Places
Sao Jose dos Campos, Sao Paulo
25 March 2020

Based on internal studies and in collaboration with international partners, VOA prepared this information circular for Spraying for Disinfection of Surfaces and Places. The purpose of this circular is to inform anyone interested, including and not limited to the VOA franchise and service network itself, of the possibilities for using Drone Technology for spraying services for the purpose of disinfection for mitigation, delay and reduction of spread of viruses in public places, streets, industrial and hospital yards, squares, among others.

In parallel, VOA launched a new area, called “Urban Spraying”, on its service platform. This area is available to receive any disinfection requests from authorities and other interested parties in any location in the national territory.

On the other hand, VOA is providing a channel to receive registrations from drone operators that have technical resources (drones, technical training) for spraying. Based on this, we will be able to facilitate that eventual demands for Disinfection are met by trained regional operators.

Access the service platform here

After your initial registration, we will contact you. If you need, contact us by phone +55 12 3911 1881 or Whatsapp +55 12 99609 4343

The introduction

International authorities and WHO work together to control the spread of the COVID-19 virus. Global governments and authorities are actively working on strategies, methods and procedures to slow and slow the evolution of the epidemic that is present today.

VOA together with the main manufacturers of industrial drones in the world has developed methods of using drones against the coronavirus using our technology to protect people's lives.

The VOA-001 and VOA-002 drones can be used to deliver a mixture of water and chlorine-based disinfectants to affected locations and areas. A drone has a maximum daily capacity in hectares of approximately 20 hectares and, therefore, can spray an average of one location per day. Drones can be handled by pilots specially trained by VOA, or by operators already trained by authorities and companies.

In addition to helping to disinfect buildings and street objects, drone spraying plays an important role in minimizing the potential for coronavirus to spread to potential virus-carrying birds and mammals, such as mice and other rodents.

The solution that has been used as a quick and effective aid in protecting against the coronavirus is based on disinfectants that have Sodium or Chlorine Hypochlorite or Alkildimethylbenzylammonium Chloride as the main active compound.

There are worldwide references for the use of drones for this purpose. Every day more and more localities are disinfected.

Spraying area:

(1) Public places where people can move, such as factories, parks, schools, gas stations, open markets, bus stations, etc.

(2) Residential district, such as localities, communities, etc.

(3) Area of ​​potential danger, such as isolation districts, hospitals and other risk areas where they may have viruses.

VOA-001 Drone in Spray Testing
VOA-001 Drone in Spray Testing
VOA-001 spraying disinfectants contract COVID-19 (Coronavirus)
VOA-001 spraying disinfectants against COVID-19 (Coronavirus)

B) Operational Procedures:

The recommendations here do not replace the operation according to the drone's flight manual, they are only complementary.

Flight Mode

  • Flight in autonomous mode in an open outdoor environment;
  • Flight in Manual GPS mode outdoors with obstacles.

Before Flight

  • Make sure the batteries are fully charged;
  • Before takeoff, perform the system calibration for the site;
  • Check obstacles in the operating area;
  • Ensure that people are not present in the operational area, respecting the current rules for operating drones.

In flight

  • Open the flight camera to observe the surroundings;
  • If necessary, the pilot can operate from elevated platforms: terraces, vehicle tops;
  • The flight must be VLOS (in line of sight);
  • Pay attention to systems against external interference, especially magnetometers.

After the Flight

The disinfectant containing chlorine or ammonia is corrosive. After missions, the equipment must be cleaned and kept free of disinfectant residues immediately.

Squares and Streets Drone against COVID-19 (Coronavirus)
Squares and Streets Drone against COVID-19 (Coronavirus)

C) Product Recommendations:

Based on tests carried out and on the history of applications in the world and in Brazil, one can assume the use of disinfectants whose active principle is:

  • Sodium hypochlorite, or;
  • Alkyldimethylbenzylammonium chloride.

The tables below provide some guidelines for spraying.

PurposeConcentrationNecessary timeMethod
Disinfection of Surfaces and Things0.1% 1000mg / L10 min1L of water with 20ml of primary solution
Dip disinfection of contaminated things0.05% 500mg / L1L of water with 10ml of primary solution

Area TypeConcentrationAltitudeSpeedVolumeBicos
Suspected infection area0.10%3 to 5 meters3 to 5 m / s3 to 4.5 ml / m2015
Area without suspected infection0.05%3 to 5 meters3 to 5 m / s4.5 to 7.5 ml / m2 015

D) Observation of Rules and Regulations:

The operations suggested in this circular are, as a rule, feasible to be carried out while respecting the current legislation for the operation of Drones.

Special attention should be paid to the Brazilian Special Civil Aviation Regulation 94 and ICA 100-40., As provided in the Procedures and Specifications for the VOA Approved, Document VOA-BIZ-100-00.

For more information on the regulation of Drones in Brazil, access the website of ANAC, DECEA.

D) References:

This circular has as references:

  1. ANVISA, Patient Safety in Health Services, Cleaning and Disinfecting Surfaces, Brasília, 2010.
  2. World Economic Forum, 3 Ways China is Using Drones to Fight Coronavirus, March / 2020.
  3. PAN, C. UK university study identifies Chinese drone maker XAG as best fit for disinfection operations to fight coronavirus spread, Seoul, March 27, 2020.
  4. Utilities Middle East staff. Covid-19 Spread Opens New Frontiers For Drones In UAE, Dubai, March 31, 2020.
  5. Staff Reporter, April 03, 2020, New Delhi, SDMC uses drones to disinfect Nizamuddin.
  6. AYLING, L. Daily Mail Australia, April 03, 2020, How the streets, shopping malls and playgrounds of Australia could soon be sprayed with disinfectant by DRONES in a radical new plan to defeat coronavirus.
  7. General office of the national health commission of China, New Coronavirus Pneumonia Prevention and Control Solution, Notice of the General Office of the National Health and Health Commission on Issuing a New Coronavirus Pneumonia Prevention and Control Plan (Fifth Edition), 21st Feb 2020.
  8. General office of the national health commission of China, Guidelines for the Use of Disinfectants, Notice of the General Office of the National Health and Health Commission on Printing and Distributing Guidelines for the Use of Disinfectants, 19th Feb 2020.
  9. National Health Surveillance Agency - ANVISA, Recommendations and alerts on disinfection procedures in public places carried out during the COVID-19 pandemic, March 27, 2020, TECHNICAL NOTE No 22/2020 / SEI / COSAN / GHCOS / DIRE3 / ANVISA