Ammonium-Nitrogen Removal in Wastewater Through Adsorption Utilizing Bio-Sorbent Matrix

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Chalisa Jantaraksa
Nawatch Surinkul


Adsorption is one of the effective methods for removing nutrients from effluent. Adsorbent such as chitosan and various formed of activated carbon such as granulated, maize cob and bamboo were used in nitrogen-rich wastewater treatment. An alternative to the aforementioned adsorbent is bio-sorbent, a biological material that could adsorb desired substances from aqueous solution. Eggshell, with calcium carbonate as the main composition, is a waste and readily available biological material for the adsorbent matrix development. This study aimed to develop an effective and economical alternative adsorbents matrix with eggshell incorporated for the adsorption of nitrogen for the treatment of effluent from aquaculture. Eggshell was collected and washed with distilled water several times and dried in the oven at 105oC overnight, then, ground into different sizes of 250-151, 150-75, and less than 75 µm. Batch experiments were performed under a simulated influent condition with ammonium sulfate concentration of 1 to 10 gL-1. The ammonium removals were ranged from 20 to 44 percent. Formed eggshell matrixes with bentonite was also tested for ammonium nitrogen adsorption, the adsorption efficiency were ranged from 20 to 41 percent. This study reaffirms that eggshell matrix could be used as bio-sorbent for ammonium nitrogen removals. However, the treatment cost of eggshell is needed to be considered.


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