Department of Civil Engineering and Architecture and C-MADE, University of Beira Interior Edificio 2 das Engenharias, Calcada Fonte do Lameiro, 6201-001 Covilha, Portugal.
J Environ Sci (China). 2010;22(6):820-5. doi: 10.1016/s1001-0742(09)60183-2.
Two media bed (gravel and Filtralite NR) were tested in a mesocosm to evaluate the removal of organic matter (as chemical oxygen demand (COD)), ammonia (NH4-N), nitrite, nitrate and solid matter (as total suspended solids (TSS)) for a synthetic wastewater (acetate-based) and a domestic wastewater. The use of Filtralite allowed average removal rates (6-16.8 g COD/(m2 x day), 0.8-1.1 g NH4-N/(m2 x day) and 3.1 g TSS/(m2 x day)) and removal efficiencies (65%-93%, 57%-85% and 78% for COD, NH4-N and TSS, respectively), higher than that observed in the experiments with gravel. The applied loads of COD, ammonia, nitrate and TSS seem to influence the respective removal rates but only for the treatment of domestic wastewater with higher correlation coefficients for Filtralite. Regardless the type of media bed and the type of wastewater, nitrate was completely removed for nitrogen loading rates up to 1.3 g NO3-N/(m2 x day). There was no evidence of the influence of nitrate loads on the removal of organic matter.
两种介质床（砾石和 Filtralite NR）在中观模型中进行了测试，以评估其对合成废水（基于乙酸盐）和生活污水中的有机物（以化学需氧量 (COD) 表示）、氨 (NH4-N)、亚硝酸盐、硝酸盐和固体物质（以总悬浮固体 (TSS) 表示）的去除效果。Filtralite 的使用实现了平均去除率（6-16.8 g COD/(m2 x day)、0.8-1.1 g NH4-N/(m2 x day)和 3.1 g TSS/(m2 x day)）和去除效率（65%-93%、57%-85%和 78%分别用于 COD、NH4-N 和 TSS），高于砾石实验中的观察值。COD、氨、硝酸盐和 TSS 的应用负荷似乎影响各自的去除率，但仅对生活污水处理具有更高的 Filtralite 相关系数。无论介质床的类型和废水的类型如何，只要氮负荷不超过 1.3 g NO3-N/(m2 x day)，硝酸盐就会被完全去除。没有证据表明硝酸盐负荷对有机物去除有影响。
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