{"created":"2023-06-19T10:29:53.153927+00:00","id":9952,"links":{},"metadata":{"_buckets":{"deposit":"fa69f24e-3b28-41c1-b105-2d8b791a602f"},"_deposit":{"created_by":18,"id":"9952","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"9952"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:00009952","sets":["41:227"]},"author_link":["56146"],"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2019-03-25"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"},{"subitem_degreegrantor_language":"en","subitem_degreegrantor_name":"Muroran Institute of Technology"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_25":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"下水汚泥は，他のバイオマスと比較して量・質ともに年間を通して安定しており，収集や運搬についても既存の都市インフラを活用できる等，メリットの多い純国産のバイオマスである。下水汚泥の燃料利用については，2012年度頃より普及が進んでおり，政策的にもさらに後押しする大きな流れが形成されつつある。一方で，RDFに代表される廃棄物由来の固形燃料の自己発熱性に起因して，重大な火災・爆発事故につながるケースが顕在化しており，その特性を十分に理解し，対策につなげることが求められている。本来廃棄物である下水汚泥から製造した炭化物（以下，下水汚泥炭化物という）は，下水汚泥特有の不快臭が軽減され，性状が石炭に近いため，石炭代替燃料として利用しやすい。しかし，下水汚泥には人間活動に伴って排出される成分や，下水処理場の処理工程で添加される薬剤が含まれる等，石炭と同列に自己発熱性を評価することはできない。石炭においても，自己発熱のメカニズムが全て明らかになっているわけではないことを勘案すると，下水汚泥炭化物の自己発熱性について個別に十分な検証が必要である。本研究では，下水汚泥炭化物の性状と自己発熱性の関係を明らかにし，実際に下水汚泥炭化物を製造する商用プラントを対象として，適用可能な自己発熱性抑制技術について検討するとともに，下水汚泥炭化物の自己発熱性を従来手法よりも簡便に評価可能な試験方法を開発することを目的とした。本論文の構成は以下の通りである。第1章では，本研究の背景ならびに目的について述べている。第2章では，下水汚泥炭化物について，炭化度と炭化物性状の関係（炭化特性）を明らかにするとともに，石炭との比較を行い，固形燃料としてのポテンシャルについて論述した。また，炭化度と自己発熱性の関係，鉄化合物含有率と自己発熱性の関係について検証した。第3章では，下水処理場の処理工程で広く使用されている薬剤であるポリ硫酸第二鉄に注目し，自己発熱性へ与える影響について検証した。鉄化合物の酸化反応による発熱挙動については，TG-DTAによる測定にて確認した。また，酸化反応に寄与する鉄化合物を特定するため，大型放射光施設（SPring-8）を用いたXAFS測定ならびにXRDによる鉄化合物の形態解析を行った。第4章では，下水汚泥炭化物を製造する商用プラントに適用可能な自己発熱性抑制技術の検討を行った。検討した技術は大きく分けて「炭化物の搬送過程における強制酸化」と「炭化物の貯留過程における強制酸化」の2種類である。第5章では，自己発熱性の試験方法に関して従来の試験方法では試験期間約3日間試料量約8Lが必要であり，日常管理に取り込みにくいという課題があったことから，従来方式よりも短期間かつ少量の試料量で評価できる試験手法の開発を行った。そして，以上で得られた成果を第6章にて総括している。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"Sewage sludge is a biomass expected to be utilized as energy source, but due to its moisture and odor it is difficult to utilize as it is. Carbonization technology makes sewage sludge similar to coal and remove odor, so it becomes easier to utilize as fuel. On the other hand, carbonized sewage sludge has self-heating characteristics like coal, so it is important to understand its characteristics and deal with carefully. In this study, properties of carbonized sewage sludge and self-heating characteristics were measured, and the relationships between them were revealed. And technologies to control self-heating characteristics were examined for commercial plants that actually produce carbonized sewage sludge. In addition, a test method that can evaluate self-heating characteristics of carbonized sewage sludge more easily than conventional methods was developed. The structure of this thesis is as follows. Chapter 1 describes the background and objectives of this study. Chapter 2 revealed the relationships between degree of carbonization and properties of carbonized sewage sludge, and potential as a solid fuel was discussed compared with coal. And the relationships between self-heating characteristics and degree of carbonization, iron compound content were verified. Chapter 3 focused on poly ferric sulfate that is one of the chemicals widely used in sewage treatment plants, and the influence of poly ferric sulfate on self-heating characteristics was examined. Thermal behavior of iron compounds due to low temperature oxidation was measured by TG-DTA. In order to identify the iron compounds causing low temperature oxidation, elemental speciation of iron compounds was conducted by XAFS and XRD. In Chapter 4, technologies to control self-heating characteristics for commercial plants that actually produce carbonized sewage sludge were examined. Examined technologies are roughly divided into two types: \"forced oxidation in transport process\" and \"forced oxidation in storage process\". In Chapter 5, a test method that can evaluate self-heating characteristics of carbonized sewage sludge more easily than conventional methods was developed. Because the developed method reduced test period and sample volume, it has become easier to apply to daily management. Chapter 6 summarizes the results obtained through all chapters.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第427号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/00009900","subitem_identifier_reg_type":"JaLC"}]},"item_81_subject_9":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"579","subitem_subject_scheme":"NDC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第427号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第427号"}]},"item_81_text_16":{"attribute_name":"研究科・専攻","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"工学専攻"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":""}]}],"creatorNames":[{"creatorName":"上田, 厚志","creatorNameLang":"ja"},{"creatorName":"UEDA, Atsushi","creatorNameLang":"en"},{"creatorName":"ウエダ, アツシ","creatorNameLang":"ja-Kana"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-02-28"}],"displaytype":"detail","filename":"A427.pdf","filesize":[{"value":"5.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A427","objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/9952/files/A427.pdf"},"version_id":"c1c175d4-19cc-4887-8c12-a9050ab038e4"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-06-25"}],"displaytype":"detail","filename":"A427_summary.pdf","filesize":[{"value":"344.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"A427_summary","objectType":"abstract","url":"https://muroran-it.repo.nii.ac.jp/record/9952/files/A427_summary.pdf"},"version_id":"8ec27428-7233-4239-9dcc-82a4b138643f"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"下水汚泥炭化物の自己発熱性およびその抑制技術に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"下水汚泥炭化物の自己発熱性およびその抑制技術に関する研究","subitem_title_language":"ja"},{"subitem_title":"A study on self-heating characteristics of carbonized sewage sludge and technologies to control it","subitem_title_language":"en"}]},"item_type_id":"81","owner":"18","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2019-06-25"},"publish_date":"2019-06-25","publish_status":"0","recid":"9952","relation_version_is_last":true,"title":["下水汚泥炭化物の自己発熱性およびその抑制技術に関する研究"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2024-01-22T02:40:49.468550+00:00"}