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Comparative Study of the Growth Rate and Wastewater Treatment Efficiency of (Caulerpa sertularioides) and (Ulva intestinalis) in Shrimp Pond Effluent

Organization(s):Princess Chulabhorn Science High School Trang
Country:Thailand
Student(s):1. Miss. Sawitta Jongjai 2. Miss. Annawee Chapplang
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):salamiyah kittibunyathiwagon
Contributors:-
Report Type(s):Virtual Science Symposium Report
Protocols:Dissolved Oxygen, Nitrates, pH, Salinity, Water Temperature
Presentation Video: View Video
Presentation Poster: View Document
Language(s):English
Date Submitted:2026-01-30
This cover image shows the collection of seaweed samples, including Ulva intestinalis and Caulerpa sertularioides, from a natural water source. The samples were collected for a comparative study on their growth and efficiency in treating wastewater from shrimp farming ponds. The activity represents the fieldwork process prior to laboratory analysis
This study aimed to compare the growth rate and wastewater treatment efficiency of (Caulerpa sertularioides) and (Ulva intestinalis) in shrimp pond wastewater. The experiment was conducted under two water conditions: seawater (control) and shrimp pond wastewater. Each condition consisted of three treatments: (C.sertularioides), (U.intestinalis), and a mixed culture, with three replicates per treatment over a four-week period. Algae were cultured in 40-liter basins with an initial biomass of 25 g. Water quality parameters, including dissolved oxygen (DO), pH, temperature, and salinity, were monitored, and growth rate was determined by weekly biomass measurements .The results indicated that (U.intestinalis) exhibited the highest wastewater treatment efficiency, with DO increasing from 6.40±0.00 mg/L to 7.25±0.37 mg/L, significantly higher than (C.sertularioides)and the mixed culture (p<0.05). The pH in the (U.intestinalis) treatment was 8.0±0.05, within the optimal range. In terms of growth rate, (U.intestinalis) showed the highest value (54.40%), followed by the mixed culture (51.60%) and (C.sertularioides) (42.80), with significant differences among treatments (p<0.05).These findings demonstrate that (U.intestinalis) has high potential as an effective and environmentally friendly biological treatment for shrimp pond wastewater.


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