Regenerable adsorbent for removing ammonia evolved from anaerobic reaction of animal urine

作     者：CHOU Liang-hsing TSAI Ru-in CHANG Jen-ray LEE Maw-tien 

作者机构：Department of Civil and Water Resource Engineering"National" Chiayi UniversityChia-YiTaiwanChina Department of Chemical Engineering"National" Chung Cheng UniversityChia-YiTaiwanChina Department of Applied Chemistry"National" Chiayi UniversityChia-YiTaiwanChina. 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2006年第18卷第6期

页      面：1176-1181页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：HzSOdC in the early cycles of regeneration was due to collapse of the fine pores and, in turn, formation of the larger pores. The process lends itself to removal of NH3 fiom the effluent in biodegradation of animal urine, which is normally saturated with moisture. Acknowledgments: The support of contract No. NSC 94-EPA-Z-194-001 "National" Chiayi University and "National" Chung Cheng University is acknowledged 

主　　题：ammonia removal regenerable adsorbent reactive adsorption biodegradation of animal urine activated carbon 

摘      要：The waste gas evolved from biodegradation of animal urine contains ammonia causing environmental concerns. A new and effective method for removing ammonia from such waste gas using reactive adsorption is presented. In the process, activated carbon impregnated with H2SO4（H2SO4/C） is employed. Ammonia in the waste gas reacts with H2SO4 on the adsorbent instantaneously and completely to form （NIL）2SO4. The H2SO4/C adsorbent is high in NH3 adsorption capacity and regenerable. The NH3 removal capacity of this regenerable adsorbent is more than 30 times that of the adsorbents used normally in the industry. The spent H2SO4/C is regenerated by flowing low-pressure steam through the adsorbent bed to remove the （NH4）2SO4 from the adsorbent. The regeneration by-product is concentrated （NH4）2SO4 solution, which is a perfect liquid fertilizer for local use. Re-soaking the activated carbon with H2SO4 solution rejuvenates the activity of the adsorbent. Thus the H2SOJC can be reused repeatedly. In the mechanism of this reactive adsorption process, trace of H20 in the waste gas is a required, which lends itself to treating ammonia gas saturated with moisture from biodegradation of animal urine.