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Hybrid Filtration System for Treatment of Stormwater Runoff
Abstract Hydrocyclone is widely used in industry, for its simple design, high capacity, low maintenance and low operational cost. The objective of this study is to develop ballasted hydrocyclone flocculation and filtration systems (BHFF) system. The BHFF system is consisted of hydrocyclone ballasted coagulation with polyaluminium chloride silicate (PACS) and upflow filter to treat micro particles in urban storm runoff. Roadside sediment particles (<100 μm) was mixed with tap water to make various turbid suspensions to determine the optimum PACS dosage. The experiment of Jar test was applied with rapid mixing at 200 rpm for 1 min, slow mixing at 50 rpm for 3 min, and settling period for 5 min. The results of Jar test showed that PACS optimum dosage was 7.0 mg/L, which these conditions left residual turbidity to less than 2.0NTU. The synthesized turbidity was made with roadside sediment particles to evaluate performance of BHFF system. There are two modes (without PACS use and with PACS use) of operation for BHFF system. In case of without coagulant use, the range of SS, turbidity removal efficiency were 42.9–95.8% (mean 80.8%), 20.2–88.2% (mean 61.7%), respectively. And, the recovery rate of filter was 72.8–85.9% (mean 80.9%) the rate of remained solid loading in filter media was 16.6–27.2%(mean 19.1%) after backwashing. The results of Jar test showed that PACS optimum dosage was 7.0 mg/L, which these conditions left residual turbidity to less than 2.0NTU. In case of BHFF run with coagulant use, the range of SS, turbidity removal efficiency were 62.2–100.0 (mean 88.8%), 64.5–99.8% (mean 88.7%), respectively. Based on SS loading mass balance analysis, the recovery rate of filter was 87.5–90.1% (mean 89.2%). It was found that removal efficiency was enhanced with PACS dosage. In case of coagulant use, the particle size of effluent is bigger than influent particle size. The BHFF system, which came out to solve the problems of low efficiency of removing micro particles of upflow filtration type stormwater treatment devices, therefore HBFF is considered as an alternative system.
Hybrid Filtration System for Treatment of Stormwater Runoff
Abstract Hydrocyclone is widely used in industry, for its simple design, high capacity, low maintenance and low operational cost. The objective of this study is to develop ballasted hydrocyclone flocculation and filtration systems (BHFF) system. The BHFF system is consisted of hydrocyclone ballasted coagulation with polyaluminium chloride silicate (PACS) and upflow filter to treat micro particles in urban storm runoff. Roadside sediment particles (<100 μm) was mixed with tap water to make various turbid suspensions to determine the optimum PACS dosage. The experiment of Jar test was applied with rapid mixing at 200 rpm for 1 min, slow mixing at 50 rpm for 3 min, and settling period for 5 min. The results of Jar test showed that PACS optimum dosage was 7.0 mg/L, which these conditions left residual turbidity to less than 2.0NTU. The synthesized turbidity was made with roadside sediment particles to evaluate performance of BHFF system. There are two modes (without PACS use and with PACS use) of operation for BHFF system. In case of without coagulant use, the range of SS, turbidity removal efficiency were 42.9–95.8% (mean 80.8%), 20.2–88.2% (mean 61.7%), respectively. And, the recovery rate of filter was 72.8–85.9% (mean 80.9%) the rate of remained solid loading in filter media was 16.6–27.2%(mean 19.1%) after backwashing. The results of Jar test showed that PACS optimum dosage was 7.0 mg/L, which these conditions left residual turbidity to less than 2.0NTU. In case of BHFF run with coagulant use, the range of SS, turbidity removal efficiency were 62.2–100.0 (mean 88.8%), 64.5–99.8% (mean 88.7%), respectively. Based on SS loading mass balance analysis, the recovery rate of filter was 87.5–90.1% (mean 89.2%). It was found that removal efficiency was enhanced with PACS dosage. In case of coagulant use, the particle size of effluent is bigger than influent particle size. The BHFF system, which came out to solve the problems of low efficiency of removing micro particles of upflow filtration type stormwater treatment devices, therefore HBFF is considered as an alternative system.
Hybrid Filtration System for Treatment of Stormwater Runoff
Lee, J. H. (author) / Yang, S. H. (author) / Song, D. H. (author)
2018-09-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
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