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SLUDGE PROCESSING METHOD, SLUDGE PROCESSING SYSTEM, AND METHOD FOR MANUFACTURING ADSORBENT NEW 新技術説明会

外国特許コード F200009999
整理番号 (S2018-0293-N0)
掲載日 2020年1月29日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2019JP013523
国際公開番号 WO 2019189549
国際出願日 平成31年3月28日(2019.3.28)
国際公開日 令和元年10月3日(2019.10.3)
優先権データ
  • 特願2018-066821 (2018.3.30) JP
発明の名称 (英語) SLUDGE PROCESSING METHOD, SLUDGE PROCESSING SYSTEM, AND METHOD FOR MANUFACTURING ADSORBENT NEW 新技術説明会
発明の概要(英語) This sludge processing method is characterized by including: an adsorption step of bringing a sludge digestion liquid into contact with an adsorbent to remove, by adsorption into the adsorbent, at least a portion of a phosphorous component contained in the sludge digestion liquid; and a combustion step of burning digested sludge obtained by removing at least said portion of the phosphorous component from the digestion liquid in the adsorption step. The present invention makes it possible to provide a sludge processing method and processing system capable of reducing the amount of the phosphorous component vaporized during combustion, and suppressing adverse effects on a combustion furnace.
従来技術、競合技術の概要(英語) BACKGROUND ART
Sewage treatment water discharged from the sludge for the treatment of sewage sludge or the like, restrictions on landfill disposal site to prevent the environmental pollution problem of depletion or the like, many combustion of the combustion furnace is employed.
Sewage sludge digestion sludge dewatering processing (hereinafter, also referred to as simply 'sludge') is, the high concentration phosphorus (for example, about 30% in terms of ash) is included. For this reason, when the combustion of the sludge, the sludge contained in the evaporation of phosphorus component, such as a wall of the combustion furnace as the phosphate compound is attached to, or damage to the furnace wall of the combustion furnace, or clog the exhaust pipe, the heat exchange tube or such a problem that corrosion occurs.
Therefore, in the sludge, the sludge in order to reduce the amount of phosphorus contained in the research has been carried out.
As the techniques for removing the phosphorus, magnesium ammonium phosphate (MAP) using the known method, such a method, an ammonia component is required, and the problem of the length of reaction time, the above-described problem cannot be sufficiently solved.
In addition, the fine particles in the sludge, the aggregating agent to the suspension as a collection or phosphorus, polyaluminum chloride (PAC), ferric sulfates are known (for example Non-Patent Document 1).
However, aluminum chloride, ferric sulfate in the case of using polysilicon, the problem of adverse effects on the combustion furnace or the like cannot be sufficiently solved. In particular, is subjected to digestion sludge relatively high phosphorus content (e.g., fly ash in the content of 10 mass % content of equal to or more than) if included, the above problem occurs more remarkably. Also, these are, expensive, and the problem of cost increase of the amount of ash was also a problem.
On the other hand, the water used in the factory or mine, many heavy metal contaminants such as can be included. Such contamination in the case where the water is drained, it is necessary to sufficiently remove the contaminants.
In addition, such as well water of the contaminated soil contaminants such as heavy metal to be included, such as drinking water in the case of using as a domestic water, it is necessary to sufficiently remove contaminants.
In the related art, the removal of the contaminants, which is used for a large amount of adsorbent (for example, see Patent Document 1). However, in an alkaline solution (for example, hydrogen ion exponent (pH) is 10 or more in the liquid) is performed in the processing by the adsorbent, heavy metals cannot be adsorbed sufficiently, due to the heavy metal adsorption or re-dissolved, it is difficult to sufficiently remove the contaminants was.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • NIIGATA UNIVERSITY
  • 発明者(英語)
  • KIM, Hee Joon
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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