Application of ammonia stripping in sewage for ammonia removal

Chen, Yee Being (2020) Application of ammonia stripping in sewage for ammonia removal. [Project Paper] (Submitted)

Text lp FK 2020 13.pdf Download (2MB)

Abstract

Sewage is conveyed to a sewage treatment plant for removal of impurities before discharging into rivers, lakes or oceans. All existing sewage treatment plants in Malaysia are not designed for removal of ammoniacal nitrogen whereby excessive ammoniacal nitrogen in waterways can cause pungent smell. Nitrification-denitrification process for ammonia removal requires high treatment cost. In this study, application of ammonia stripping to remove ammoniacal nitrogen in sewage was investigated using a lab-scale ammonia stripping reactor. Ammoniacal nitrogen concentration of sample was identified by phenate method from a constructed calibration curve that had R2 of 0.9956. Evaluation on effects from variables as well as optimization of operating parameters was performed by central composite design (CCD) of response surface methodology (RSM). A linear model with R2 of 0.3719 was suggested by software. Based on maximum ammonia removal efficiency criteria, the optimum operating parameters were 5g/L, 70 and 3 hours for sodium hydroxide dosage, air-liquid ratio and stripping time respectively. At optimal conditions, the predicted ammonia removal efficiency was 42.76% but the actual removal efficiency was 49.84%. Ammonia removal efficiency of 63.36% was achieved in a prolonged treatment of 5 hours. Absorption process was studied whereby deionized water was able to recover 31% of stripped ammonia gas. This study demonstrated that ammonia stripping could be used to remove ammoniacal nitrogen present in sewage.

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms Siti Mariam Giman
Date Deposited:	21 Nov 2022 08:13
Last Modified:	21 Nov 2022 08:13
URI:	http://psaspb.upm.edu.my/id/eprint/612

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