Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors
碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 98 === This study investigated the Fe0/CO 2 recirculated system coupled with fluidized sand bed reactor system under different operating conditions to determine the hydraulic parameters suitable for the removal of arsenate. The effect on hydraulic parameters were...
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ndltd-TW-098CNUP55150462015-10-13T19:06:45Z http://ndltd.ncl.edu.tw/handle/17237794144732452406 Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors Fe0/CO2串聯流體化床反應系統之水力特性試驗 Hsin-Wei Wang 王信惟 碩士 嘉南藥理科技大學 環境工程與科學系暨研究所 98 This study investigated the Fe0/CO 2 recirculated system coupled with fluidized sand bed reactor system under different operating conditions to determine the hydraulic parameters suitable for the removal of arsenate. The effect on hydraulic parameters were investigated using a tracking dye (Reactive Orange 16) by varying the inflow rate (60, 95, 125, 180, 310 mL / min) and the carbon dioxide bubbling rate (100, 200, 300 mL / min) for the recirculated treatment system. For the fluidized sand bed process, effect on hydraulic parameters were investigated by varying the amount of sand (1, 2, 3 kg) and the air flow rate (100, 200, 300 mL / min). The pH, DO, ORP of the system during operation were recorded in real-time. The experimental results showed that the Fe0 /CO2 treatment system at 200 mL/min of carbon dioxide bubbling rate can create a low pH environment conducive to the removal of arsenate when using micro scale iron and at an inflow rate of 310 mL/min, its hydraulic retention time is determined to be at 35 min. This indicates that the higher removal observed in the fluidized sand bed process, due to additional adsoeption sites offered by sand, will decrease due to a higher arsenic concentration coming from the Fe0 /CO2 treatment system. When 15 g of micro scale iron is added to the Fe0 /CO2 treatment system, the observed removal at the Fe0 /CO2 treatment system is around 40% in 45 min, decrease to around 25% in 90 min and to around 20% in 120 min. However, the removal at the fluidized-sand bed is around 95% in 45 min and decrease to 85% in 90 min to 80% in 120 min, due to an increasing higher arsenic concentration from the Fe0 /CO2 treatment system. However, when 5g of micro scale iron is added three times, at an interval of 45 min, the observed removal in the Fe0 /CO2 treatment system is around 55% in 45 min, then decrease to around 50% in 60 min, then increase again to 55% in 90 min due to additional dosage of iron at 80 min. The observed removal in the fluidized san bed is around 85% in 45 minutes then increase to around 90%, due to improved observed removal in the Fe0 /CO2 treatment system and maintaining the observed removal efficiency in 90 min, then decrease to 85 % in 120 min. The result indicated that multi-step addition of micro scale iron can remove arsenate better that a single addition. Chih-Hsiang Liao 廖志祥 2010 學位論文 ; thesis 103 zh-TW |
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碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 98 === This study investigated the Fe0/CO 2 recirculated system coupled with fluidized sand bed reactor system under different operating conditions to determine the hydraulic parameters suitable for the removal of arsenate. The effect on hydraulic parameters were investigated using a tracking dye (Reactive Orange 16) by varying the inflow rate (60, 95, 125, 180, 310 mL / min) and the carbon dioxide bubbling rate (100, 200, 300 mL / min) for the recirculated treatment system. For the fluidized sand bed process, effect on hydraulic parameters were investigated by varying the amount of sand (1, 2, 3 kg) and the air flow rate (100, 200, 300 mL / min). The pH, DO, ORP of the system during operation were recorded in real-time.
The experimental results showed that the Fe0 /CO2 treatment system at 200 mL/min of carbon dioxide bubbling rate can create a low pH environment conducive to the removal of arsenate when using micro scale iron and at an inflow rate of 310 mL/min, its hydraulic retention time is determined to be at 35 min. This indicates that the higher removal observed in the fluidized sand bed process, due to additional adsoeption sites offered by sand, will decrease due to a higher arsenic concentration coming from the Fe0 /CO2 treatment system. When 15 g of micro scale iron is added to the Fe0 /CO2 treatment system, the observed removal at the Fe0 /CO2 treatment system is around 40% in 45 min, decrease to around 25% in 90 min and to around 20% in 120 min. However, the removal at the fluidized-sand bed is around 95% in 45 min and decrease to 85% in 90 min to 80% in 120 min, due to an increasing higher arsenic concentration from the Fe0 /CO2 treatment system. However, when 5g of micro scale iron is added three times, at an interval of 45 min, the observed removal in the Fe0 /CO2 treatment system is around 55% in 45 min, then decrease to around 50% in 60 min, then increase again to 55% in 90 min due to additional dosage of iron at 80 min. The observed removal in the fluidized san bed is around 85% in 45 minutes then increase to around 90%, due to improved observed removal in the Fe0 /CO2 treatment system and maintaining the observed removal efficiency in 90 min, then decrease to 85 % in 120 min. The result indicated that multi-step addition of micro scale iron can remove arsenate better that a single addition.
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author2 |
Chih-Hsiang Liao |
author_facet |
Chih-Hsiang Liao Hsin-Wei Wang 王信惟 |
author |
Hsin-Wei Wang 王信惟 |
spellingShingle |
Hsin-Wei Wang 王信惟 Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
author_sort |
Hsin-Wei Wang |
title |
Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
title_short |
Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
title_full |
Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
title_fullStr |
Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
title_full_unstemmed |
Hydraulic parameters characterization on the system of Fe0/CO2 and fluidized sand bed reactors |
title_sort |
hydraulic parameters characterization on the system of fe0/co2 and fluidized sand bed reactors |
publishDate |
2010 |
url |
http://ndltd.ncl.edu.tw/handle/17237794144732452406 |
work_keys_str_mv |
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