纤维与石英砂过滤技术的比较研究

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1.58kPa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。

Comparison between fiber and sand filtration technology

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.