DSpace collection: 會議論文

Nitrate Removal from Groundwater Using Constructed Wetlands

title: Nitrate Removal from Groundwater Using Constructed Wetlands abstract: To investigate the kinetic behaviors of nitrate removal from groundwater using constructed wetlands, this study set up two flow-through pilot-scale constructed wetlands with the same areal size but various flow patterns (free water surface flow (FWS) and subsurface flow (SF)) to receive a synthetic nitrate contaminated groundwaterat a target concentration of 20 mg NO3-N L-1. These two wetlands were operated at nearly identical hydraulic loading rate (HLR) in every trial and sequentially run in various trials with different HLRs ranging from 0.02 to 0.27 m d-1. Nitrate removal rates of both wetlands increased with increasing hydraulic loading rate until a maximum valus was reached. The maximum removal rates, occurred at HLR of 0.12 and 0.07 m/d, were 0.910 and 1.161 g N/m2/d for the FWS and SF wetland, respectively. After the maximum values were reached, further increasing HLR led to a considerable decrease in nitrate removal rate. Nitrate removal efficiencies remmained high (>85%) and effluent nitrate concentrations always satisfied drinking water standard (<10 NO3-N/L) when HLR did not exceed 0.04 m/d for both FWS and SSF wetlands. As HLR was greater than 0.4 m/d, effluent nitrate significantly increased and removal efficiency cinsiderably decreased with the increase of HLR. The longitudinal transect nitrate data show that the SF wetland exhibited a frist-order plug-flow reactor profile, while the FWS watland diverged from a plug flow response. The first-order nitrate removal rate constant, determined either from longitudinal transect data or influent-effluent data, tends to decrease with increasing HLRs, which may be due to increase of nitrate loading rate decreasing the denitrification rate in wetlands. The FWS wetland provided significantly higher (p<0.05) organic carbon in effluent than the SF wetland, while the SF wetland exhibited significantly (p<0.05) lower effluent DO than the FWS wetland. However, there was no significant difference (p>0.5) in nitrate removal performance between the two types of constructed wetlands in this study except in one trial operating at HLR of 0.06~0.07 m/d.

International and National Collaboration Approach on Constructed Wetland as Natural Treatment for Sewage Treatment at Ubon Ratana Dam Sub District Municipality,Khon Kaen Thaialnd

title: International and National Collaboration Approach on Constructed Wetland as Natural Treatment for Sewage Treatment at Ubon Ratana Dam Sub District Municipality,Khon Kaen Thaialnd abstract: Constructed wetland as natural sewage treatment established at Ubon Ratana Dam Municipality, Khon Kaen, Thailand has demonstrated as the success project conducted by the strong collaboration of academic institutes and governmental agencies. The universities include Chia Nan University of Pharmacy and Science(CNU, Taiwan) and Khon Kaen University(KKU, Thailand) as the knowledge transfer organization under the collaborating support of the regional governmental office (Regional Environmental Office, REO 10) as the policy and planning organization and local government (Ubon Ratana Dam Municipality) as the operating organization. Collaboration could be accomplished under 3M concept including mutual interest, mutual understanding and mutual respect. In addition to 3M, two more factors called as 2F which are mutual fund and mutual fun have to be significantly cooperated to such accomplishment. This paper, therefore, presents how to successfully implement the project in terms of international and national collaboration approach and will not cover techical design.

Profile of Industry-University Linkage at Chia Nan University of Pharmacy and Science

title: Profile of Industry-University Linkage at Chia Nan University of Pharmacy and Science abstract: The RDC and IIC are the major platform for industry-university linkage at Chia Nan University of Pharmacy and Science. Organization for promoting such linkage and achievement of the recent three fiscal years (2005-2007) will be addressed. According to statistical data, the R&D funding and industry-related support amounts to around 120 million NTD for the fiscal year of 2007.In terms of intellectual property, currently, the approved CNU-owned patents total 59, plus40 in the reviewing process.There're22 companies which are now incubated in the campus of Chia Nan University. The revenue of technology transfer amounts to around 1 million NTD for the recent three fiscal years. In the long run, both RDO and IIC will serve to support sustainable development of university operation.

台灣南部人工溼地之蒸發散特性

title: 台灣南部人工溼地之蒸發散特性 abstract: 本文主要探討各類人工溼地之蒸發散特性及其與相關氣象因子之關連性，其觀察研究對象包括自由表面流動式(FWS：free water surface flow)、潛流式(SSF：subsurface flow)、無植栽潛流式等小型人工溼地模場及大型人工溼地實場，由相關實驗結果可知由於觀測期間洽由冬末漸至夏初，FWS(A1 系統)蒸發散呈二階段變化，於2008.02.12~ 03.19 呈現區間變動特性，而於2008.03.19~05.18 期間，則隨溫度而漸次增加，其平均值約為3.44cm/d，此現象應肇因於前者之水生植物處於休眠期所致。至於SSF(A2 系統)之結果與FWS 系統相比較，可發現SSF 蒸發散較無FWS 呈兩階段化明顯，惟隨冬末漸至夏初之溫度升高，蒸發散值之變動範圍也明顯增大，其平均值約為2.72cm/d。無植栽石頭床SSF 系統，較不受蒸散影響，其變化趨勢亦未有FWS 與SSF 系統之兩階段變化，其平均值約為1.97cm/d。而於冬季水生植物休眠期之大型人工溼地實場(系統B)而言，其蒸發散呈現相對區間變動變化，其平均值約為3.00cm/d。另由各類人工溼地系統與氣溫之相關性結果可發現小型FWS 系統之蒸發散特性變化與氣溫間之相關係數為0.76，顯示二者間具有高度相關，而當自由液面降至礫石面下後，亦即SSF 系統，其相關係數則降為中度相關之0.57。如將水生植栽去除，相關係數為-0.35，其結果呈現接近低度負向相關。以上各系統係置於六層大樓屋頂，系統受樓板輻射熱較大，氣溫之影響較大，而系統置於地面時(系統B)，則其相關係數呈現低度相關之0.2，顯示溫度於人工濕地之蒸發散程序中並非主導性因數。至於風速與相對濕度之關連性則未呈現高度相關性。