适用于贵州某酒厂生态湿地除磷的本地基质筛选研究

The local substrates for phosphorus removal in ecological wetlands of a distillery in Guizhou Province

为筛选适宜于贵州某酒厂生态湿地构建的本地基质,对贵州5种本地基质及3种常用基质开展实验研究。结果表明:各基质净化含磷浓度0.5 mg/L溶液的吸附能力由大至小为:石灰岩>火山岩>沸石>陶罐>陶粒>碎石>红砖>BAF滤料;石灰岩、陶罐、碎石、火山岩4种典型基质的磷平衡浓度均极低,均适宜于净化低浓度含磷废水;石灰岩31.95%的Ca元素及1.06%的Mg元素是其对磷吸附能力较强的原因所在,火山岩则缘于11.56%的Fe元素及7.04%的Al元素含量,而碎石、陶罐的Al、Fe、Ca、Mg元素含量相对较少、磷去除能力较低。综合来看,该酒厂采用本地基质构建生态湿地时,可以石灰岩为主,适量使用碎石、陶罐。

To select the suitable local substrates for the construction of an eco-wetland in a distillery in Guizhou Province,experimental studies were conducted on 5 local substrates and 3 common substrates.The results showed that the adsorption capacities of the substrates to purify a 0.5 mg/L phosphorus solution,from highest to lowest,were limestone>volcanic rock>zeolite>pottery pot>ceramsite>crushed stone>red brick>BAF filter material.The phosphorus equilibrium concentrations of limestone,pottery pot,crushed stone,and volcanic rock were low,which were suitable for purifying a low-concentration phosphoruscontaining wastewater.Limestone had a higher phosphorus adsorption capacity due to 31.95%Ca and 1.06%Mg.Volcanic rocks had 11.56%Fe and 7.04%Al.While gravel and pottery pots had relatively low Al,Fe,Ca,and Mg contents with a low phosphorus removal capacity.When constructing an eco-wetland using a local matrix in the distillery,limestone could be used as the primary substrate,with a moderate use of gravel and pottery pot.