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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 環境工程學系所 > 依資料類型分類 > 碩博士論文 >  醫療廢水處理節能模式操作之探討-以醫學中心醫院為例

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/155328

標題: 醫療廢水處理節能模式操作之探討-以醫學中心醫院為例
Energy-saving operation of medical wastewater Treatment Using Medical Center Hospital as an Example
作者: 趙政綱
Chao, Jeng-Kang
Contributors: 洪俊雄
環境工程學系所
關鍵字: 活性污泥法;二級處理系統;醫療廢水;去除率;節能模式
activated sludge treatment;activated sludge treatment system;medical wastewater;removal rate;energy-saving operation
日期: 2013
Issue Date: 2013-11-21 11:52:34 (UTC+8)
Publisher: 環境工程學系所
摘要: 污水廠操作一般討論重點大部分放在污染物去除或功能性探討,甚少將污染物去除率及污泥產出量與能源使用消耗情形進行比較,如果污水廠設計正確,提供無限量資源使用,污染物的去除應有不錯表現,然而在探討一個依據活性污泥法(activated sludge treatment)柱塞流型反應 (plug flow reactor, PFR)二級處理系統運轉30年廢污水處理廠而言,其設計進流水量2,500 CMD,進流水質生化需氧量250 mg/L、化學需氧量500 mg/L、懸浮固體250 mg/L,為追求較佳去除率一般所採取方案不外乎充分提供較高理論需氧量,使處理後放流水質生化需氧量及懸浮固體<10 mg/L以下,化學需氧量<30 mg/L。以醫學中心醫院之醫療廢水處理廠個案觀點為例,探討88年至90年分析三年累計統計數據,廢污水處理量介於1,454~1,938 CMD時,年平均產出含水率84%脫水污泥重量計有360.805噸,實際污水處理量僅有其設計處理率之65.14%,平均每噸污水處理用電量為0.233度,二氧化碳排放量每月平均為11,162 Kg,污泥每月產出平均量為30,067 Kg。在經歷不斷測試檢討分析操作參數關連性,92年完成污水處理設備更新工程及節能設備產品應用如向量變頻器、高效率馬達及以空氣攪拌取代機械攪拌等方式,由99年至101年統計資料觀察,實際污水處理量亦只有設計污水處理率之68.38%,平均每噸污水處理用電量為0.099度,放流水質BOD<14 mg/L去除率可達83.76%,COD<52mg/L,SS<9.8 mg/L,二氧化碳排放量每月平均為5,208 Kg,脫水污泥年平均產出量為123.617噸。因此在有效規劃節能模式與提升性能效率下,以99年至101年統計資料為基準與88年至90年三年統計數據比較,可節省用電量及二氧化碳排放量53.33%與減少脫水污泥65.74%的產出,而且放流水質依然符合環保署管制醫療保健服務業放流水排放標準。
For wastewater treatment operation, it is usually be concerned about the pollutants removal and its application. The removal rate and sludge production haven’t be discuss with energy consumption before. In a normal wastewater treatment, the pollutants removal rate should have a great performance when adequate resource was provided. For instance, a plug flow activated sludge treatment system, which had been operated for 30 years, was provided oxygen demand higher than theoretical parameter to achieve a better removal rate. From 1999 to 2001, the average annual production of the dehydrated sludge with moisture content of 84% was 360.805 tons when medical wastewater treatment capacity was at range of 1,454 ~ 1,938 CMD. The sewage treatment efficiency was designed as 65.14%. The power consumption was 0.233 degrees/tons, average of carbon dioxide emissions was 11,162 kg/month and the sludge production was 30,067 kg/month. After revising the operating parameters and exchanging energy-saving equipment such as vector inverter and high efficient motor in the later three years, the electricity consumption and performance became better. The power consumption became 0.099 degrees/tons, average of carbon dioxide emissions became 5,208 kg/month, the sludge production became 123.617 tons/year and, furthermore, the effluent BOD < 14 mg/L, COD < 52 mg/L, SS < 9.8 mg/L, removal rate became 83.76%. Consequently, under the energy-saving operation and efficiency improvement, the power consumption, carbon dioxide emissions and sludge production decreased about 0.134 degrees/tons, 5,954 kg/month and 19,766 kg/month, respectively. Also, the effluent quality was in accord with the EPA health care services effluent emission standard.
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