LOOK: CdeO City invention disinfects bacteria on face masks


The Department of Science and Technology (DOST) Region 10 recently tested the efficiency of a locally-produced C-type ultraviolet light (UV-C) disinfection device made to disinfect personal protective equipment (PPE), particularly N95-type face masks.

Elpidio Paras, who is also the chief executive officer of Parasat Cable TV, developed the “Parazapp” as a way to help medical frontliners who are looking after coronavirus patients.

Through the UV cabinet, frontliners can reuse their PPE several times, instead of discarding them after a single-use. It is also portable and low-cost equipment made of locally-available materials such as stainless steel cabinet, timer system, UV-C germicidal lamps.


Testing and evaluation

DOST’s Regional Standards and Testing Laboratories (RSTL), which released the initial finding Monday, conducted the tests which entailed samples of N95 face masks contaminated with Escherichia Coli (E. coli) bacteria being subjected to different exposure times from 30 seconds to five minutes inside Parazapp.

“The test achieved 83 percent to 97 percent reduction of E. coli populations when used for five minutes. Through statistical methods, the team also estimated the proper exposure time needed to achieve higher reduction levels. At least 24 minutes of exposure inside the Parazapp may be needed to achieve a 99.99 percent reduction of E. coli populations in the masks, and at least 38 minutes may be needed to achieve 99.9999 percent reduction,” the DOST-10 report said.

The agency described Parazapp as a portable and low-cost disinfecting equipment that is composed of locally-available materials such as stainless steel cabinet, timer system, and UV-C germicidal lamps.

Paras collaborated with DOST-10 through RSTL for the initial evaluation of the germicidal properties and initial determination of the optimal exposure time for the Parazapp.

DOST-10 noted that with the current rise of Covid-19 positive patients in various parts of the country, the Parazapp can be potentially used to disinfect viruses in PPE and other medical equipment and devices.

However, the agency said the device still requires more research and development with appropriate methods, testing equipment, and facilities.

Meanwhile, Romela Ratilla, DOST-10 assistant director, said the agency always welcomes innovations from local inventors to help ease the effects of the pandemic.


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Blayce Malaya

Content and Media Specialist at WhatALife! Born under the star sign Gemini, Blayce first discovered her love for writing through journal writing. Then, she stumbled upon fiction writing in 2016 and explored student journalism in 2018. Despite an amateur, Blayce continues to thrive and deliver quality content to her readers.