Effects of high ammonia loads on nitrogen mass balance and treatment performance of a biotrickling filter |
| |
| Institution: | 1. Centre for Education in Environmental Sustainability, and Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, New Territories, Hong Kong;2. College of Environmental Science and Engineering, State Key Laboratory for Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China;3. Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Tsing Yi Island, Hong Kong;1. Department of Chemistry, Adekunle Ajasin University, Nigeria;2. Department of Chemistry, The Federal University, Wukari, Nigeria;3. School of Chemical Engineering, Universiti Sains Malaysia, Malaysia;1. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, PR China;2. Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea;3. Department of Bioinformatics, University of Sciences and Technology, Daejeon 305-350, Republic of Korea;4. Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, PR China;1. Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. School of Engineering and Information Technology, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia;1. Department of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;2. Department of Risk Management, Graduate School of Environmental and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;3. Department of Safety Management, Faculty of Environmental and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;1. Chemical Engineering Department, College of Engineering, University of Diyala, Baquba City, Diyala, Iraq;2. Chemical Engineering Department, College of Engineering, University of Baghdad, Aljadrea, Baghdad, Iraq |
| |
| Abstract: | A biotrickling filter packed with coal slag as packing medium was continuously used for more than 9 months under high ammonia loading rates of up to 140 g/m3/h. Nitrogen mass balance and microbial community analysis were conducted to evaluate the inhibitory effects of high ammonia concentration and metabolic by-products on the rates of nitrification. Ammonia removal efficiency reached above 99% at an empty bed retention time of as low as 8 s when inlet concentrations were below 350 ppm. The maximum and critical elimination capacities of the biotrickling filter were 118 g/m3/h and 108.1 g/m3/h, respectively. Kinetics analysis results showed that less than 2.5 s was required for the biotrickling filter with pH control to treat ammonia at concentrations of up to 500 ppm in compliance with the Taiwan EPA standard (outlet NH3 < 1 ppm). Results of mass balance and microbial community analysis indicated that complete removal was mainly contributed by the activities of autotrophic ammonia oxidizing bacteria and not by physical absorption or adsorption at low loading rates. However, at high inlet loadings, ammonium became the dominant by-product due to inhibitory effects of high ammonia concentration on the bacterial community. |
| |
| Keywords: | Ammonia removal Biotrickling filter Inhibitory effects Coal slag |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
