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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Influence of the particle size of carbonate-siliceous rock on the efficiency of phosphorous removal from domestic wastewater
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Influence of the particle size of carbonate-siliceous rock on the efficiency of phosphorous removal from domestic wastewater

机译：碳酸盐 - 硅质岩石粒径对家水缺水磷去除效率的影响

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The aim of the study was to determine the influence of the particle size of carbonate -silica rock (opoka) used in rock filters on the efficiency of phosphorus removal from domestic wastewater. The investigations were carried out in a laboratory using a model consisting of three vertical flow filters with carbonate -silica rock of different particle sizes (G(1)=1-2 mm; G(2) = 2-5 mm; G(3) = 5-10 mm). The tested rock was subjected to decarbonising at 900 C and consisted primarily of 51.7% SiO2, 23.2% CaO, and 7.6% A1203. In the first three weeks of the study (1-3), the hydraulic load of each filter was Qi = 0.721/day and the hydraulic residence time was HRII = 24 h; in the next three weeks (4-6) Q(2) = 1.081/day and HRT2 =16 h, and during the last three weeks (7-9) Q(3) = 1.441/day and HRT3 =12 h. A significant influence of the size of rock particles and the hydraulic load (hydraulic residence time) on the efficiency of total phosphorus removal and on phosphorus concentration in the wastewater discharged from the system was observed (proportional to = 0.05). Statistically, the best removal of phosphorus from wastewater - an average of 97%, was found in the substrate with the smallest particle size (rock G(1), 1-2 mm) at the lowest hydraulic load of 0.721/day and at a hydraulic residence time of 24 h. The lowest phosphorus removal efficiency was observed in the filter containing rock G3 with a particle size of 5-10 mm (mean <60%). The average concentration of total phosphorus in wastewater flowing out from filter G(1) was 0.23 mg/l, which was much below the limit values specified by EU regulations. The overall phosphorus load removed during the study period (nine weeks) in the filter with fraction G(1) was 0.38 g/kg of rock, in the filter with G2-0.30 g/kg of rock, in the filter G3-0.28 g/kg of rock. The load of phosphorus removed during this period not characterized the full sorption capacity of the rock. The study showed that the rock subjected to decarbonising at 900 C could be successfully used to remove phosphorus from domestic wastewater, especially in areas where phosphorus removal requirements are very high <2 mg/l). 2016 Elsevier B.V. All rights reserved.
机译：该研究的目的是确定岩石过滤器中使用的碳酸盐 - 硅岩（OPOKA）粒径对来自家畜的磷去除效率的影响。在实验室中进行研究，该模型在实验室中进行，该模型由具有不同颗粒尺寸的碳酸盐 - 硅岩（G（1）= 1-2mm; g（2）= 2-5mm; g（3 ）= 5-10毫米）。将测试的岩石在900℃下进行脱碳，主要为51.7％SiO 2，23.2％CaO和7.6％A1203。在研究的前三个星期（1-3）中，每个过滤器的液压负荷为QI = 0.721 /天，液压停留时间是HRII = 24小时;在接下来的三周（4-6）Q（2）= 1.081 /天和HRT2 = 16小时，在过去三周（7-9）Q（3）= 1.441 /天和HRT3 = 12h。观察到岩石颗粒尺寸和液压载荷（液压停留时间）对从系统排出的废水中的总磷去除效率和磷浓度的显着影响（比例到= 0.05）。在统计上，在废水中最佳地去除来自废水的磷，在基板中，在最小的粒度（岩石G（1），1-2毫米），最低液压载荷为0.721 /天和A液压停留时间为24小时。在含有岩石G3的过滤器中观察到最低磷去除效率，粒径为5-10mm（平均<60％）。从过滤器G（1）流出的废水中总磷的平均浓度为0.23mg / L，低于欧盟规定规定的极限值。在馏分G（1）的过滤器中的研究时期（九周）中除去的总磷载荷为0.38g / kg岩石，在过滤器中，在过滤器G3-0.28 g中的岩石中。 / kg岩石。在此期间除去的磷的负荷未表征岩石的充分吸附能力。该研究表明，在900℃下脱碳的岩石可以成功地用于去除国内废水中的磷，特别是在磷去除要求非常高<2 mg / L的区域中。 2016年Elsevier B.v.保留所有权利。

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