Banana peel waste can be used as an adsorbent to clean heavy metals out of the wastewater from small-scale screen-printing businesses, which is usually dumped into the drains around the businesses without being cleaned first. Adsorbent from banana peel waste can adsorb heavy metals in wastewater. Will produce a license.

The household-scale screen printing industry generally does not treat its wastewater due to the ignorance of the owner. Heavy metals in the wastewater from the screen-printing industry are harmful when present in the soil and water environment. Usually, the household-scale screen printing industry does not have a large area of land and is in a dense residential environment, so a technology is developed that does not require large areas of land, is easy to operate, and produces good processing efficiency. Adsorbents from banana peel waste are easy to make and acquire as raw materials. Researchers hope their work will produce less waste from banana peels and less pollution from heavy metals.