Page 84 - Abstract book - TJSSF-2020

Thailand – Japan Student Science Fair 2020 (TJ-SSF 2020)
“Seeding Innovations through Fostering Thailand – Japan Youth Friendship”

The wastewater treatment machine nano zinc oxide

Jirart Nganrungreung , Siriyakorn Theprat , Nattiwut Wisedsri
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Advisors: Namthip Srikeaw , Surasuk Boontima
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1 Princess Chulabhorn Science High School Loei

Abstract

This project aims to invent the wastewater treatment machine and to study the performance of coliform
bacteria disinfection by mixing clear coating with Nano ZnO coated on a propeller and inside the bucket.
We use ultraviolet light to catalysis Nano ZnO and disinfects coliform bacteria. The activated charcoal
box was used to absorb the waste gas from hydrogen sulfide (H2S) by sucking the air to pass through
the tube then the activated carbon that contains inside the tube will absorb the waste gas. From the
measurement of water quality by measuring pH, DO, hydrogen sulfide concentration and total coliform
bacteria every 30 minutes for 6 times, the results showed that pH increase to 6.02 from 4.22, DO
increase to 4.02 mg /l from 2.31 mg /l, the total of coliform bacteria decreased and the concentration of
hydrogen sulfide decrease after absorption. The information represents that the wastewater treatment
machine can treatment wastewater contamination coliform bacteria and absorb the hydrogen sulfide
effectively.

Keyword: Nano ZnO, Quality of water, The wastewater treatment machine

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