Mothinee Aopreeya. Removal of total nitorgen and phosphorus in the shimp farm effluent by burned blood cockle shell. Master's Degree(Appropriate Technology for Resources and Environmental Development). Mahidol University. : Mahidol University, 2008.
Removal of total nitorgen and phosphorus in the shimp farm effluent by burned blood cockle shell
Abstract:
This research was carried out to investigate the efficiency of removal of total
nitrogen and phosphorus from shrimp farm effluent by burned blood cockle shells.
The removal of total nitrogen and phosphorus varied with blood cockle shells size
and flow rate. The characteristics of blood cockle shells were studied by comparing
burned blood cockle shells, natural blood cockle shells and activated charcoal
The results indicated that the burned blood cockle shells at 0.85-2.0 millimeters
had a removal efficiency of total nitrogen and phosphorus at 86.66% and 77.53%,
respectively. The best flow rate was 300 ml./hour. Burned blood cockle shell, natural
blood cockle shell and activated charcoal were all absorbent. Burned blood cockle
shell was the most effective in phosphorus and total nitrogen removal. Equilibrium
modeling of the adsorption isotherm was more fitted to the Langmuir model than
Freundlich model. The characteristics of burned blood cockle shells by Gas Sorption
Analyzer by Bunauer, Emmett and Teller method (BET) indicated they had higher
BET surface area and bigger average pore size than natural blood cockle shells.