纤维与石英砂过滤技术的比较研究
Comparison between fiber and sand filtration technology
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摘要: 提出了无需额外反冲洗装置与动力消耗的水力自清洗纤维过滤技术，与石英砂过滤进行了比较研究，探索该技术应用的可行性。结果表明，10 m/h滤速下纤维过滤与石英砂过滤相比，出水浊度、SS分别降低59%和86%，COD、TOC、TP和TN降低5%~20%，水头损失大幅降低，两者初始水头损失分别为0.12 kPa和3.97 kPa，5 h后分别达到1.58 kPa和5.98 kPa。纤维滤柱反冲洗历时40 s，而石英砂滤柱为15 min，反洗耗水率分别为2.9%和6.9%。反洗后纤维滤柱出水浊度和SS分别为4.08 NTU、6 mg/L，低于石英砂滤柱的5.81 NTU、28 mg/L。水力自清洗纤维过滤技术可节省动力装置和动力消耗，反冲洗历时短、耗水率低，具有较好的应用前景。Abstract: Comparative study was carried out between hydraulic self-cleaning fiber filtration， a technology free of equipments and power consumption in backwashing， and sand filtration. Results showed that at filtration velocity of 10 m/h， fiber filtration achieved reduction of turbidity and SS by 59% and 86% compared to sand filtration， COD， TOC， TP and TN by 5%~20%. Head loss was greatly minimized in fiber filtration. Initial head losses were 0.12 kPa and 3.97 kPa， and reached 1.58 kPa and 5.98 kPa after 5 h’s operation for fiber and sand filtrations respectively. A mere 40 s backwashing time was enough for fiber filter while 15 min required for sand filter， with water consumption rates being 2.9% and 6.9%， respectively. Turbidity and SS of fiber effluent after backwashing were 4.08 NTU and 6 mg/L， lower than that of sand filtration (5.81 NTU， 28 mg/L). The hydraulic self-cleaning fiber filtration could be a promising technology due to no backwashing equipment and power consumption， quick backwashing and low water consumption rate.
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Key words:
- fiber filtration /
- sand filtration /
- hydraulic self-cleaning /
- backwashing
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