| Abstract |
| This study aimed to assess the removal efficiency for TN and TP depending on whether or not settling is removed in an advanced water treatment system for ships, where sequencing batch reactor (SBR) and membrane bioreactor (MBR) processing is applied, to satisfy the water quality standards of the Marine Environment Protection Committee (MEPC) of the International Maritime Organization (IMO). For these purposes, the concentrations of TN and TP in the inflow and outflow water were measured to calculate the TN and TP removal efficiencies. Water discharged from a bathroom, which was created for the experiment, was used as raw water. Under Condition 1, settling existed, and aeration was conducted for 150 min, settling for 45 min, agitation for 15 min, and settling for 15 min. Under Condition 2, settling did not occur, and aeration was conducted for 180 min and agitation for 60 min. The mixed liquor suspended solids (MLSS) concentration in the reactor was 3,500 mg/L, whereas the aeration rate was 121 L/min and the water production rate was 1.2 L/min. According to the results, the average TN removal efficiency was 42.2% and the average TP removal efficiency was 49.5%, under Condition 1, whereas the average TN removal efficiency was 64.9% and the average TP removal efficiency was 55.6%, under Condition 2. Although the final nutrient levels did not satisfy the water quality standards of MEPC 227(64), the TN and TP removal efficiencies were higher under Condition 2 where no settling occurred. |
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| Key Words |
| Advanced Sewage Treatment for Shipboard, Sedimentation, SBR, MBR, T-N |
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