下水污泥再利用方案探討;Scheme of sewage sludge recycling

NCUIR > Engineering College > Executive Master of Civil Engineering > Electronic Thesis & Dissertation > Item 987654321/67953

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/67953

Title:	下水污泥再利用方案探討;Scheme of sewage sludge recycling
Authors:	程介羲;Cheng,Jie-xi
Contributors:	土木工程學系在職專班
Keywords:	下水污泥;污泥處理再利用技術;下水污泥灰渣;卜作嵐材料;Sewage Sludge;Sludge Treatment and Reuse Technology;Sewage Sludge Ash;Pozzolanic Material
Date:	2015-07-29
Issue Date:	2015-09-23 10:05:26 (UTC+8)
Publisher:	國立中央大學
Abstract:	摘要下水道建設是現代化都市不可或缺的主要公共設施，國家競爭力之評量指標，行政院積極推動全國污水下水道建設，於103 年9 月10 日核定內政部營建署所提「污水下水道第五期建設計畫」，計畫於104~109 年將公共污水下水道「用戶接管普及率」提升至35.10%及「整體污水處理率」提升為60.80%之目標，預料下水污泥量亦將逐年增加。下水污泥中富含有機物質、無機物質及重金屬等特性，本研究蒐集彙整國內外下水污泥再利用法規、再利用技術，配合我國下水污泥特性、相應之法規、政府政策及國情等因素，將下水污泥再利用技術依「再生能源利用」、「綠農地利用」及「土建材料利用」三大類下水污泥再利用技術，納入技術之優勢及劣勢因子，進行技術面、市場面、環境面及法規面等面向進行討論，評估最適化前處理污泥減量技術之優勢與劣勢並討論其可行性。考量下水污泥再利用方式眾多，且礙於現行法規及行政院農委會反對下水污泥相關再利用產品施用於農地等限制因素，本研究提出之下水污泥碳化設備併入水泥窯製程方案以符合法規及農委會之意見。本研究主要是利用水泥窯之廢熱將下水污泥碳化，同時將下水污泥乾燥、碳化製程產生之有機廢氣導回水泥窯內燃燒，再將碳化產品(輔助燃料) 與煤炭混合後做為水泥製程燃料使用，最終目地係將下水污泥灰渣混入煤灰中直接進入到卜作嵐材料應用體系。;Abstract Sewage systems are an indispensable public facility of modern urban areas, and are an indicator of national competitiveness. As part of its active efforts in developing nationwide sewerage systems, the Executive Yuan ratified the “Phase 5 Sewage System Construction Plan” of the Construction and Planning Agency, which aims to increase the ratio of household pipelines connected to public sewage to 35.10% and the overall ratio of sewage treatment to 60.80% between 2015 and 2020; sewage sludge volume is expected to show sequential growth each year. Sewage sludge is rich with organic matter, inorganic matter, and heavy metals. This study collects data on domestic and foreign laws and regulations related to sewage sludge reuse, reuse technologies, characteristics of sewage sludge in Taiwan, corresponding laws and regulations, government policy, and the national situation. Sewage sludge reuse technology is divided into three categories, namely “renewable energy,” “green farmland” and “construction material,” and the strengths and weaknesses of each technology is analyzed from the perspective of technology, market, environment, and laws and regulations, evaluating the most technology for sludge reduction and discussing its feasibility. Considering that there are many methods for reusing sewage sludge, but sewage sludge reuse products cannot be used in farmland due to current laws and regulations, as well as objections from the Council of Agriculture (COA), this study proposes the use of sewage sludge carbonization equipment together with a cement kiln, so as to produce a product that conforms to current laws and regulations and satisfies the COA’s requirements. This study mainly uses waste heat from a cement kiln to carbonize sewage sludge. The organic waste gas generated from drying and carbonizing the sewage sludge is channeled back into the cement kiln for combustion, and then the carbonized product (auxiliary fuel) is mixed with coal and used as fuel for the cement making process. The ultimate objective is to mix sewage sludge ash into coal ash and directly uses it as part of the pozzolanic material application system.
Appears in Collections:	[Executive Master of Civil Engineering] Electronic Thesis & Dissertation

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