A Study on the Improvement of Nitrogen Removal Efficiency in Small Size Sewage Treatment Facility Utilizing Zeolite Carrier
| Periodical | Materials Science Forum (Volume 724) |
|---|---|
| Main Theme | Eco-Materials Processing and Design XIII |
| Edited by | Jing Sun, Lian Gao, Hyungsun Kim, Jian Feng Yang, Tohru Sekino and Soo Wohn Lee |
| Pages | 53-56 |
| DOI | 10.4028/www.scientific.net/MSF.724.53 |
| Citation | Hyun Jong Joo et al., 2012, Materials Science Forum, 724, 53 |
| Online since | June, 2012 |
| Authors | Hyun Jong Joo, Jung Soo Choi, Kwang Hyun Lee, Sung Chul Kim |
| Keywords | Ion Exchange, Natural Zeolite, Nitrogen Removal, Retrofitting Process, Zeolite Carrier |
| Price | US$ 28,- |
The aim of this research was to develop a zeolite carrier for wastewater treatment in a small-size sewage treatment facility. To evaluate the ion-exchange characteristic of zeolite medium, the isotherm equation of both Langmuir and Freundlich model were examined. It was found that the maximum absorption amount (qm) and adsorption strength (1/n) were about 2.94 mg NH4+-N/g and 0.3854, respectively. In order to validate the adsorption performance by applying the zeolite carrier to the in-situ field, nitrogen removal efficiency was evaluated by a retrofitted process in the small sewage treatment where carbon-nitrogen ratio was especially low in influent. By the application of this proposed method, the effluent TN concentration was in the range of 6.5-20 mg/L (average of 12.9 mg/L) which may satisfy sufficient discharge standard limit. The zeolite medium had ion-exchange capacity of 30-40% of influent NH4+-N concentration, and TN removal efficiency improved about 40% compared to the existing process. Therefore, the renovation of the carrier utilization shows the possibility of pre-treatment of NH4+-N in influent and thus improves the TN removal efficiency of wastewater treatment.
