Page 86 - Abstract book - TJSSF-2020

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

Phosphate absorbing material in washing water

Wittawin Punpeng ,Natthakit Thongchana
1
1
Advisor: Montien Songserm
1

Chonrasadornumrung
1

Abstract
The purpose of this project is to study the suitable materials for phosphate adsorption in washing water
and find a suitable binder to mold the material and absorb the phosphate in waste water with high
phosphate content which causes the plants to grow too much. We studied the materials for using to
absorb phosphate substances by using many materials Group 1 is egg shell, mussel shell and fly ash.
Group 2 is Chamchuri tree bark and Mangosteen shell. Group 3 chicken bones and pork bones. Finding
suitable materials for phosphate absorption is studied by Dissolve the detergent in water 10 grams of
each material were absorbed for 30 minutes. Tested by standard phosphate test kit, found that egg shells,
mussel shells and fly ash can reduce the amount of phosphate in the water. Then took the eggshell
Mussel shells and fly ash to burn by kiln with the temperature of 800 C for 3 hours and tested it again
๐
by dissolving the detergent in water until having a phosphate value of 5 mg / l when using egg shells
to burn. Burned mussel shells and 10 grams of fly ash absorbed for 30 minutes. It was found that the
detergent solution when adding the burned egg shells. Flaming mussel shells and fly ash had the
phosphate values reduced to 0.25, 0.5, 1.0 mg / l respectively. The coagulation of all 3 absorbent
materials with quicklime, plaster and tapioca flour, it was found that mussel shells and fly ash use
tapioca flour to combine well with for the eggshell, the plaster is needed to combine well. The use of
absorbent materials was tested by preparing 6 liters of washing water to measure 2.5 mg / l of phosphate.
When 3 types of absorbent were added in 30 minutes, we found that phosphate in washing water was
reduced to about 0.5 mg/l

Keywords: phosphate adsorption, egg shells, mussel shells, fly ash

74