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Study of the effectiveness of bioabsorbent to absorb wastewater from rubber factories.
Organization(s):Princess Chulabhorn Science High School Trang
Country:Thailand
Student(s):1. Master Narakorn Buakaew
2. Miss Phatpapha Chukot
3. Miss Warissara Chootong
Grade Level:Middle School (grades 6-8, ages 11-14)
GLOBE Member(s):salamiyah kittibunyathiwagon
Contributors:Mrs. Jintana Mahasawat Position: Fisheries Specialist (Expert Level)
Mr. Siwaporn Yongrat Fisheries scholar
Mr. Wannayut Khongsai Production Manager, Guangken Rubber (Trang) Co., Ltd.
Report Type(s):Virtual Science Symposium Report
Protocols:Dissolved Oxygen, Nitrates, pH, Water Temperature
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Language(s):English
Date Submitted:2026-01-30
This project, " Study of the effectiveness of bioabsorbent to absorb wastewater from rubber factories," aimed to investigate the efficiency of bioadsorbent made from water hyacinth and azolla in absorbing wastewater from rubber factories. Seven ratios of water hyacinth:azolla were tested: 100:0, 90:10, 70:30, 50:50, 30:70, 10:90, and 0:100. The experiment was divided into three stages: Stage 1 creating bioabsorbent; Stage 2 study the effectiveness of bioadsorbent by measuring DO, pH, ammonia, and nitrite at various times within 24 hours; and Stage 3 testing the effectiveness of bioabsorbent. The results showed that the bioadsorbent with a 50:50 water hyacinth:azolla ratio exhibited the highest efficiency in absorbing wastewater from rubber factories. This efficiency was significantly correlated with an increase in DO (p < .05) and a continuous decrease in nitrite and ammonia (p < .05). The findings are consistent with the biological nitrification process. Furthermore, the 50:50 ratio bioadsorbent was found to have a degradation rate of up to 61.85% within 24 hours. Therefore, the 50:50 ratio bioadsorbent is suitable for development as an bioabsor for wastewater from rubber factories and possesses the best biodegradability.
Keywords: Bioabsorbent, Degradation rate