請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/72088
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 林正芳 | |
dc.contributor.author | Haon-Yao Chen | en |
dc.contributor.author | 陳虹瑤 | zh_TW |
dc.date.accessioned | 2021-06-17T06:22:44Z | - |
dc.date.available | 2023-08-21 | |
dc.date.copyright | 2018-08-21 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-17 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/72088 | - |
dc.description.abstract | 為符合日漸嚴苛的氮化物放流水標準,污水處理廠急需發展改善現有程序,有效削減氮化物並大大提升總氮之去除率。但污水處理廠大都採好氧活性污泥法去除有機物及硝化反應用去除氨氮,卻無法去除總氮。改造既有好氧槽,使之同時具備厭氧/缺氧/好氧的功能,可做為實現脫硝反應的可行方案。
厭氧生物處理程序相較於好氧生物處理,無曝氣設備,所需電力消耗較少,厭氧污泥產量低於好氧污泥,厭氧生物反應產生甲烷可用於產能,甚至可以翻轉傳統污水處理廠由能源消耗設施,轉變為產能設施。在實際應用方面,厭氧生物反應處理都市污水,可去除有機物卻無法處理氮化物,實需末端處理程序去除碳氮。 本研究以固定生物技術為除氮程序,固定生物板在好氧單槽內提供厭氧環境,以固定材料的可透水性和厚度提供的氧氣傳輸限制,在固定生物板進行同步硝化及脫硝反應,使既有設施在最小改造工程下有效去除氮化物。而固定生物技術可配合需求塑型,強韌的醋酸纖維結構包覆微生物生長,可提供提升在好氧的環境下使氮化物去除。可處理既設污水處理廠所需除氮程序,及厭氧生物反應出流水的除碳氮需求。 本研究分兩個實驗,固定生物技術無論在好氧設施,及厭氧處理流程後,確實可有效去除氮化合物。實驗一為:每日處理1.3噸實際都市污水,以EBT+AS (Entrapped bio-technology coupled with activated sludge)流程模廠控制MLSS (Mixed liquor suspended solids) 1500-2500 mg/L和固定生物板PR (Packing ratio) 3.2%。在HRT (Hydraulic retention time) 6小時DO (Dissolved oxygen) 4-6 mg/L操作下,氮化物被去除,進流TN (Total nitrogen) 28 mg/L,出流可達TN 7.3 mg/L,其TN去除量為25 g TN/m2-d。在EBT+AS系統中,以AS(activated sludge)系統強化硝化反應,提升EBT (Entrapped bio-technology)系統的脫硝反應,並以此實驗結果應用於實驗二。而實驗二為:處理厭氧固定生物反應出流水,以EBT和EBT+AS系統為末端處理程序,用以去除氮化物和剩餘有機物。在HRT 8-24小時操作下,其COD (Chemical oxygen demand)去除率74-88%,TN去除率58-65%。 一般對除氮實驗建議的進流水狀態COD/TN >6,故在處理實廠都市污水程序中,通常都以外加碳源(甲醇)來補充脫硝反應所需COD/TN之不足。以固定生物技術操作實驗中,實際都市污水COD/TN僅2.92-3.55。而厭氧固定生物反應出流水的COD/TN更低為1.46,然實驗二在處理厭氧固定生物反應出流水,發覺以厭氧生物反應後的小分子有機物更可有效提供脫硝反應所需碳源的補充。在上述的實廠都市污水處理和厭氧固定生物反應出流水處理皆可有效去除有機物和氮化物。 | zh_TW |
dc.description.abstract | As wastewater discharge standards regarding nitrogen compounds become more stringent, there is an urgent need for wastewater treatment plants (WWTPs) to upgrade existing treatment processes for total nitrogen (TN) removal. WWTPs
have long used the activated sludge process in aeration basins to remove organics, by oxidation of biological oxygen demand and nitrification of ammonia nitrogen. However, the process provides inadequate removal of TN because the oxic environment in the basin is unfavorable for denitrification. Retrofitting the aeration basin with anaerobic/anoxic/oxic chambers and attached growth processes are alternatives to enable denitrification. Anaerobic processes for wastewater treatment are attractive and more sustainable as they require no energy-intensive aeration. The processes have been fruitfully applied in many wastewater treatment plants for their low energy consumption and in some cases net production of energy in the form of methane biogas. The anaerobic processes produce significantly less sludge volume that requires handling and disposal. Furthermore, the anaerobic processes aptly remove organics but not ammonia nitrogen. Therefore, the need exists to remove total nitrogen following anaerobic treatment of the wastewater. However, significant renovation is necessary for existing domestic WWTPs to equip them for nutrient removal, and anaerobic process effluents must be further removed from residual organics and total nitrogen before discharge. As a remedy, we have developed the entrapped bio-technology which will provide anaerobic zones in the aeration basin with minimal retrofitting effort. The bioplate creates anaerobic condition within its core due to oxygen transport limitation. The bioplate, consisting of modular, robust cellulose triacetate structure carrying the biomass, shows promise in retrofitting conventional aeration basins for enhanced nitrogen removal. At a domestic wastewater treatment plant, we performed a pilot test by entrapped bio-technology coupled with activated sludge (EBT+AS) system with the pilot aeration basin of 1.3 m3. The EBT+AS system (Mixed liquor suspended solids, MLSS of 1,500–2,500 mg/L and bioplates PR of 3.2%) operated at a hydraulic retention time (HRT) of 6 h and dissolved oxygen (DO) of 4–6 mg/L. The nitrogen in the wastewater was removed to an effluent TN of 7.3 mg/L from an influent TN of 28 mg/L, achieving a specific TN removal of 25 g TN/m2-d. Set up the post-anaerobic treatments, an entrapped bio-technology (EBT) system and an EBT+AS system, have been operated under the aerobic condition to provide organics and total nitrogen removal, achieving chemical oxygen demand (COD) removal by 74-88% and TN removal by 58-65% at hydraulic retention times of 8-24 h. The influent COD/TN in traditionally activated sludge bioreactors required more than 6. However, the domestic wastewater COD/TN was 2.92-3.55, and the anaerobic wastewater COD/TN was 1.46. To add the carbon source for denitrification, we supplied the methanol in the pilot experiment and used the volatile fatty acids (VFA) and dissolved methane in the post-anaerobic treatment. △COD/△NO3 ratios, that represent the carbon usage efficiency as electron donors for denitrification, were 1.82-2.02 in the post-anaerobic treatment and 2.9-5.55 in the pilot experiment, with methanol adding the △COD/△NO3 of 4.67-8.34. Both experiments demonstrate promise for removal of organics and nitrogen. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T06:22:44Z (GMT). No. of bitstreams: 1 ntu-107-D99541002-1.pdf: 6350201 bytes, checksum: ab91aa94d24db000456c45ac210a9534 (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 致謝 I
摘要 III Abstract V 目錄 VII 圖目錄 IX 表目錄 XI 縮寫對照表 XII 第一章 前言 1 1.1研究緣起 1 1.2研究目的 1 1.3研究架構 3 第二章 文獻回顧 5 2.1生物除氮 5 2.1.1生物除氮技術 10 2.1.2生物脫硝反應所需碳源 14 2.2固定生物法 16 2.2.1固定生物技術 19 2.2.2好氧固定生物對有機碳和氮化物去除 20 2.3厭氧處理都市污水技術 21 2.3.1厭氧固定生物技術 28 2.3.2厭氧生物系統出流有機物之特性 30 2.3.3厭氧生物反應出流末端處理 32 第三章 實驗設計及檢測方法 35 3.1 實驗架構 35 3.1.1固定生物技術處理實廠都市污水 35 3.1.2固定生物技術處理厭氧固定生物系統出流水 36 3.2 試驗反應系統設計 37 3.2.1 固定生物技術處理都市污水模廠 39 3.2.2 固定生物技術處理厭氧固定生物系統出流水 49 3.3 檢測分析方法 54 3.3.1 水質分析 54 3.3.2 氣相層析分析 57 3.3.3處理效能評估 59 第四章 固定生物技術處理實廠都市污水 61 4.1 固定生物技術處理實廠都市污水 61 4.1.1 實廠都市污水進流 61 4.1.2 固定生物系統與固定生物結合活性污泥系統 62 4.1.3 溶氧量/曝氣模式 63 4.1.4 水力停留時間 68 4.1.5 固定生物板質量密度 72 4.2添加甲醇脫硝反應 73 4.3 固定生物技術之總氮(氨氮)負荷量 77 第五章 固定生物技術處理厭氧固定生物系統出流水 82 5.1 厭氧固定生物系統出流水質 82 5.2 固定生物系統與固定生物結合活性污泥系統 84 5.3 水力停留時間 89 5.4 固定生物除氮化物系統之△COD/△NO3 91 5.5 碳源補充對固定生物技術脫硝反應 94 第六章 結論及建議 95 6.1 結論 95 6.2 建議 96 參考文獻 99 | |
dc.language.iso | zh-TW | |
dc.title | 固定生物技術去除厭氧生物反應出流水有機物與氮化物之研究 | zh_TW |
dc.title | Entrapped Biomass for Removal of Organics and Total Nitrogen from Anaerobic Bioreactor Effluents | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 康佩群(Andy P.K. Hong),張慶源,李俊福,吳忠信,林逸彬 | |
dc.subject.keyword | 固定生物技術,同步硝化脫硝,厭氧反應末端處理,△COD/△NO3, | zh_TW |
dc.subject.keyword | Entrapped bio-technology (EBT),Simultaneous nitrification and denitrification (SND),Post-anaerobic treatment,△COD/△NO3, | en |
dc.relation.page | 112 | |
dc.identifier.doi | 10.6342/NTU201803952 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2018-08-18 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
顯示於系所單位: | 環境工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-107-1.pdf 目前未授權公開取用 | 6.2 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。