Lee E Y, Cho K S, Han H D, Ryu H W
National Subsurface Environmental Research Laboratory, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, Korea.
J Environ Qual. 2002 Nov-Dec;31(6):1782-8. doi: 10.2134/jeq2002.1782.
Ammonia (NH3) removal efficencies were evaluated when hydrogen sulfide (H2S) and NH3 in binary mixture gases were supplied to a ceramic biofilter seeded with earthworm (Lumbricus terrestris) casts. The effect of inlet H2S concentration and space velocity (SV) on the removal of NH3 was investigated after the acclimation of the biofilter with NH3 gas. When NH3 was singly supplied to the biofilter, NH3 removal was maintained at almost 100% until inlet NH3 concentration was increased up to 600 microL L(-1) and SV up to 330 h(-1), at which the elimination capacity of NH3 was 148 g N m(-3) h(-1). When H2S was supplied simultaneously, however, the accumulation of toxic sulfide ions showed dual effects on NH3 removal efficiencies. First, no effects were observed at inlet H2S loading below 60 g S m(-3) h(-1); however, inhibition by H2S at higher loading was observed above 60 g S m(-3) h(-1). The point at which loading achieved a maximum of more than 99% NH3 removal efficiency was 139 g N m(-3) h(-1), when inlet H2S concentration was held under 100 microL L(-1), but it dropped to 76 and 30 g N m(-3) h(-1) when the inlet H2S concentration increased to 220 and 460 microL L(-1), respectively. The critical points of inlet H2S loading that guaranteed over 99% NH3 removal were determined as 100, 100, 60, and 40 g S m(-3) h(-1) at inlet NH3 concentrations of 100, 200, 400, and 600 microL L(-1), respectively. Inlet NH3 loading had synergic effects of increasing the inhibition of inlet H2S loading on the NH3 removability of the biofilter.
当将二元混合气体中的硫化氢（H₂S）和氨（NH₃）通入接种了蚯蚓（Lumbricus terrestris）粪便的陶瓷生物滤池时，对氨（NH₃）的去除效率进行了评估。在用NH₃气体对生物滤池进行驯化后，研究了入口H₂S浓度和空速（SV）对NH₃去除的影响。当单独向生物滤池供应NH₃时，在入口NH₃浓度增加到600 μL L⁻¹且SV增加到330 h⁻¹之前，NH₃去除率几乎保持在100%，此时NH₃的去除能力为148 g N m⁻³ h⁻¹。然而，当同时供应H₂S时，有毒硫化物离子的积累对NH₃去除效率产生了双重影响。首先，在入口H₂S负荷低于60 g S m⁻³ h⁻¹时未观察到影响；然而，在高于60 g S m⁻³ h⁻¹时观察到H₂S在较高负荷下的抑制作用。当入口H₂S浓度保持在100 μL L⁻¹以下时，负荷达到最大且NH₃去除效率超过99%的点为139 g N m⁻³ h⁻¹，但当入口H₂S浓度分别增加到220和460 μL L⁻¹时，该点降至76和30 g N m⁻³ h⁻¹。在入口NH₃浓度为100、200、400和600 μL L⁻¹时，保证NH₃去除率超过99%的入口H₂S负荷的临界点分别确定为100、100、60和40 g S m⁻³ h⁻¹。入口NH₃负荷对入口H₂S负荷对生物滤池NH₃去除能力的抑制作用具有协同增加效应。
