Kim Jung Hoon, Rene Eldon R, Park Hung Suck
Department of Civil and Environmental Engineering, University of Ulsan, P.O. Box 18, Ulsan 680-749, South Korea.
Chemosphere. 2007 Jun;68(2):274-80. doi: 10.1016/j.chemosphere.2006.12.100. Epub 2007 Feb 20.
The performance of a lab scale biofilter packed with biomedia, encapsulated by sodium alginate and polyvinyl alcohol was used for treating ammonia (NH(3)) gas at different loading rates. The metabolic end products during NH(3) oxidation were NH(4)(+), NO(3)(-) and NO(2)(-). It is noteworthy to mention that the immobilized cell biofilter required no separate acclimatization period and showed high removal efficiencies during the start of continuous experiments. The removal efficiency was nearly 100% when ammonia loading was 4.5gm(-3)h(-1) and the maximum elimination capacity achieved in this study was 5.5gNH(3)m(-3)h(-1) at a loading rate of 7.5gm(-3)h(-1). Shock loading studies were carried out to ascertain the response of the immobilized cells to fluctuations in inlet concentration and flow rate. The inlet loading rates were varied between 0.05 and 6gNH(3)m(-3)h(-1) during this phase of operation. The biofilter responded effectively to these shock loading conditions and recovered rapidly within 4-8h. Pressure drop values were consistently less and insignificant. The results from this study indicated that this immobilized cell biofilter could be considered as a potential option to treat NH(3) under steady and transient state operation.
使用填充有生物介质、由海藻酸钠和聚乙烯醇封装的实验室规模生物滤池，在不同负荷率下处理氨气（NH₃）。NH₃氧化过程中的代谢终产物为NH₄⁺、NO₃⁻和NO₂⁻。值得一提的是，固定化细胞生物滤池无需单独的驯化期，并且在连续实验开始时显示出高去除效率。当氨负荷为4.5g m⁻³ h⁻¹时，去除效率接近100%，本研究中在7.5g m⁻³ h⁻¹的负荷率下实现的最大去除能力为5.5g NH₃ m⁻³ h⁻¹。进行了冲击负荷研究，以确定固定化细胞对入口浓度和流速波动的响应。在此操作阶段，入口负荷率在0.05至6g NH₃ m⁻³ h⁻¹之间变化。生物滤池对这些冲击负荷条件有效响应，并在4 - 8小时内迅速恢复。压降值始终较小且不显著。本研究结果表明，这种固定化细胞生物滤池可被视为在稳态和瞬态操作下处理NH₃的潜在选择。
