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Ammonium Phosphate Recovery from Incinerated Ash of Sewage Sludge

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材料科学与工程（中英文A版） 2015年第11期5卷 415-420页

作者： Masaaki Takahashi Yukimasa takemoto Ken Onishi Faculty of environmental and information science Yokkaichi University YokkaichL Mie 512-8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya 4713 Iga Mie Japan

In order to establish a phosphorus recovery method, some phosphorus recovery methods from incinerated ash of sewage sludge were investigated. The phosphorus which is recovered from ash with acidic treatment, is mainly composed of aluminum phosphate. In order to remove aluminum component from aluminum phosphate, alum formation processes was investigated. The phosphorus extracted from ash was mixed with ammonium sulfate in existence of sulfuric acid, and formed alum (aluminum ammonium sulfate), and was separated by crystallization. The phosphorus which had aluminum removed, was recovered by addition of ammonium hydroxide. The recovered phosphorus was considered ammonium phosphate by X-ray analysis and XRD.

关键词： Incinerated ash sewage sludge acid treatment ammonium phosphate alum

Recovery of Aluminum Phosphate Using Magnesium Hydroxide from Incinerated Ash of Sewage Sludge

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材料科学与工程（中英文A版） 2013年第10期3卷 710-713页

作者： Masaaki Takahashi Yukimasa takemoto Ken Oonishi Faculty of Environmental and lnformation Science s Yokkaichi University Yokkaichi 512-8512 Japan Mie Chuo Kaihatsu Co. Ltd Iga 518-1152 Japan

Phosphorus in the incinerated ash of sewage sludge can be recovered by acid treatment. In order to find a cost effective neutralizer, Mg(OH) 2 was investigated instead of NaOH or Na 2 CO 3. In this experiment, phosphorus was extracted in acidic conditions (pH < 2), and dissolved phosphorus was precipitated in pH 4 by addition of Mg(OH) 2, and recovered through filtration. MgSO 4 formed by neutralization, was recovered from residue water through vaporization. 25 g of phosphorus was recovered from 100 g of ash, which is considered AlPO 4 from the chemical composition and XRD.

关键词：污水污泥氢氧化镁磷酸铝焚烧灰回收 Mg(OH)2 X射线衍射氢氧化钠

Phosphorus Recovery from Carbonized Sewage Sludge by Hydrothermal Processes

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材料科学与工程（中英文B版） 2015年第1期5卷 58-62页

作者： Masaaki Takahashi Yukimasa takemoto Ken Onishi Faculty of environmental and information science Yokkaichi University Yokkaichi Mie 512-8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya4713 Iga Mie Japan

Sewage sludge contains significant amounts of phosphorus, however, the best recovery method for them is not established. In order to establish the phosphorus recovery technique, investigation of phosphorus recovery from carbonized sewage sludge was investigated. Carbonized sewage sludge was mixed with a sodium hydroxide aqueous solution, and treated in hydrothermal conditionsfor2 to 6 hours. After this treatment, hot-water was added to the treated mixture, and phosphorus containing extract was recovered. Phosphorus was recovered as a form of sodium phosphate from phosphorus containing extract. Optimal recovery conditions were investigated in treatment temperature, amount of added NaOH and Solid- Liquid ratio of the charcoal and aq. NaOH solution. The recovered phosphorus was confirmed as sodium phosphate (Na3PO4), and its recovering rate was estimated to be about 58%-71%.

关键词：磷回收泥水炭化热工艺 NaOH溶液污水污泥氢氧化钠磷酸钠

Phosphorus Recovery from Charcoal of Sewage Sludge by Incineration Treatment

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材料科学与工程（中英文A版） 2018年第2期8卷 59-64页

作者： Masaaki Takahashi Yukimasa takemoto Eiji Yuuki Koichi Seno Yokkaichi University Research Laboratory on Environmental Technology Kayo-cho 1200 Yokkaichi Mie 512- 8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya4713 Yono Iga Mie 518-1152 Japan

Phosphorus Recovery from the Ash of Sewage Sludge Using NaOH by Heat Treatment-II—Reuse of the Alkali Water Generated by Phosphorus Recovery

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材料科学与工程（中英文B版） 2020年第4期10卷 158-162页

作者： Masaaki Takahashi Yukimasa takemoto Seiji Iwasaki Eiji Yuuki Research Laboratory on Environmental Technology Yokkaichi UniversityKayo-cho 1200YokkaichiMie 512-8512Japan Mie Chuo Kaihatsu Co. LtdHachiya 4713YonoIgaMie 518-1152Japan

The phosphorus recovery from the incinerated ash using NaOH by the heat treatment,was *** this method,non-reacted NaOH containing alkali water was generated with the phosphorus *** order to find out the best method for reuse of the alkali water,the alkali water was mixed with new reagent of NaOH,and the phosphorus recovery was carried *** phosphorus was recovered as a sodium phosphate,and the recovery rate was almost the same even with the reuse of the alkali water.

关键词： Incinerated ash sewage sludge sodium hydroxide waste alkali phosphorus recovery

Phosphorus Recovery from Carbonized Sewage Sludge by Hydrothermal Processes Using Potassium Hydroxide

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材料科学与工程（中英文A版） 2016年第2期6卷 66-70页

作者： Masaaki Takahashi Yukimasa takemoto Ken Oonishi Eiji Yuuki Yokkaichi University Research Laboratory on Environmental Technology Kayoutyou 1200 Yokkaichi Mie 512-8512 Japan Mie Chuo Kaihatsu Co. Ltd Hachiya4713 Yono Iga Mie 518-1152 Japan

《隐形口腔正畸治疗》——当代舌侧正畸学的新概念与治疗技术

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实用口腔医学杂志 2008年第2期24卷 192-192页

作者： Giuseppe Scuzzo（） Kyoto takemoto（）徐宝华（主译）不详中国医药科技出版社出版

Numerical Simulation of Air Pollution in Ulaanbaatar City, Mongolia

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材料科学与工程（中英文B版） 2015年第5期5卷 187-195页

作者： Yukimasa takemoto Masaakl Takahashi Kayoko Awaya Kaoru Ito Sachie Takeuchi Faculty of Environmental & Information Sciences Yokkaichi University Mie 512-8512 Japan Faculty of Nursing Yokkaichi Nursing & Medical Care University Mie 512-8512 Japan Faculty of Medecine Mie University Mie 514-8507 Japan

Air pollution has a major health impact on people living in UB (Ulaanbaatar) city. The excessive high particulate matter concentrations, especially in winter and in the ger areas, lead to serious illnesses and deaths. In order to get information to improve air quality in UB city, we investigate the current situation of location of ger areas and emission data of ger stoves and three thermal power plants. We reported the burning experimental result of the ger stoves and the present situation of the health hazard in a previous report. Now, in this report, we calculate the several diffusion simulations of air pollution in 2010. Our study has been carried out in collaboration with our Mongolian partner"s TCDC (Tolgoit community development center, Songinokhairkhan district), and we want to make a contribution towards a cleaner and greener UB city.

关键词：空气污染数值模拟蒙古城市空气质量合作伙伴颗粒物浓度人民健康燃烧试验

Phosphorus Recovery from Dehydrated Water Sludge by Incineration Using Alkali Metal Compounds

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材料科学与工程（中英文B版） 2020年第4期10卷 153-157页

作者： Masaaki Takahashi Yukimasa takemoto Seiji Iwasaki Kazunari Kamemoto Kastumi Iida Hiroshi Iida Research Laboratory on Environmental Technology Yokkaichi UniversityKayo-cho 1200YokkaichiMie 512-8512Japan Mie Chuou Kaihatsu Co.Ltd. Hachiya 4713YonoIgaMie 518-1152Japan Kassui Plant Co.Ltd. Akasu-cho 4-7YokkaichiMie512-1204Japan

In order to recover the phosphorus from the waste water sludge,the dehydrated sludge was mixed with the reagent of NaOH,KOH or Na2CO3,and incinerated at 750℃ or 900℃.Phosphorus in the incinerated ash of the sludge was dissolved by the addition of water,and recovered by the evaporation of the phosphorus resolved *** recovered phosphorus was confirmed to be an alkali metal phosphate,and the recovery rate reached about 75%regardless any combination of the reagents(NaOH,KOH or Na2CO3).

关键词： Water sludge phosphorus recovery incineration alkali