JP2015182246A5 - - Google Patents

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JP2015182246A5
JP2015182246A5 JP2014058521A JP2014058521A JP2015182246A5 JP 2015182246 A5 JP2015182246 A5 JP 2015182246A5 JP 2014058521 A JP2014058521 A JP 2014058521A JP 2014058521 A JP2014058521 A JP 2014058521A JP 2015182246 A5 JP2015182246 A5 JP 2015182246A5
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Japan
Prior art keywords
calcium compound
nutrient
superabsorbent polymer
absorbent article
urine
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JP2014058521A
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Japanese (ja)
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JP2015182246A (en
JP6279372B2 (en
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Priority to JP2014058521A priority Critical patent/JP6279372B2/en
Priority claimed from JP2014058521A external-priority patent/JP6279372B2/en
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Publication of JP2015182246A5 publication Critical patent/JP2015182246A5/ja
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Claims (8)

尿を含む高吸水性ポリマーを含む使用済み吸収性物品、又は尿を含む高吸水性ポリマーから尿由来の栄養塩を回収する方法であって、
前記使用済み吸収性物品又は尿を含む高吸水性ポリマーをカルシウム化合物含有水溶液に浸漬して、前記高吸水性ポリマーを不活化する不活化工程、
不活化工程を経た後の使用済み吸収性物品又は尿を含む高吸水性ポリマーと、カルシウム化合物含有水溶液との混合物を、吸収性物品の構成素材又は高吸水性ポリマーを含む固体と、カルシウム化合物および栄養塩を含む液体とに分離する分離工程、および
カルシウム化合物および栄養塩を含む液体から栄養塩を回収する栄養塩回収工程、
を含む方法。 A used absorbent article containing a superabsorbent polymer containing urine, or a method of recovering urine-derived nutrient salts from a superabsorbent polymer containing urine,
Inactivation step by immersing the calcium compound containing aqueous solution superabsorbent polymer containing the used absorbent article or urine, to inactivate the superabsorbent polymer,
A mixture of the used absorbent article or the superabsorbent polymer containing urine after passing through the inactivation step and the calcium compound-containing aqueous solution , the constituent material of the absorbent article or the solid containing the superabsorbent polymer , the calcium compound and A separation step of separating into a nutrient-containing liquid, and a nutrient recovery step of recovering the nutrient from the liquid containing the calcium compound and the nutrient ;
Including methods. 分離工程において得られたカルシウム化合物および栄養塩を含む液体を、不活化工程におけるカルシウム化合物含有水溶液として繰り返し使用することにより、カルシウム化合物および栄養塩を含む液体に含まれる尿由来の栄養塩を濃縮する、請求項１に記載の方法。   By repeatedly using the liquid containing the calcium compound and the nutrient salt obtained in the separation step as the calcium compound-containing aqueous solution in the inactivation step, the urine-derived nutrient salt contained in the liquid containing the calcium compound and the nutrient salt is concentrated. The method of claim 1. カルシウム化合物含有水溶液のカルシウム化合物濃度を高吸水性ポリマーの不活化に必要なカルシウム化合物濃度以上に維持するために、繰り返し使用するカルシウム化合物および栄養塩を含む液体にカルシウム化合物を添加する、請求項２に記載の方法。   The calcium compound is added to a liquid containing a calcium compound and a nutrient salt that are repeatedly used in order to maintain the calcium compound concentration of the aqueous solution containing the calcium compound to be equal to or higher than the calcium compound concentration necessary for inactivating the superabsorbent polymer. The method described in 1. カルシウム化合物が塩化カルシウムまたは酸化カルシウムである、請求項１〜３のいずれか１項に記載の方法。   The method according to any one of claims 1 to 3, wherein the calcium compound is calcium chloride or calcium oxide. 栄養塩回収工程において、カルシウム化合物および栄養塩を含む液体中のリンをヒドロキシアパタイトとして晶析することによりリンを含む栄養塩を回収する、または排液中のリンおよび／または窒素をリン酸マグネシウムアンモニウムとして晶析することによりリンおよび／または窒素を含む栄養塩を回収する、請求項１〜４のいずれか１項に記載の方法。   In the nutrient recovery step, the phosphorus in the liquid containing the calcium compound and the nutrient is crystallized as hydroxyapatite to recover the nutrient containing phosphorus, or the phosphorus and / or nitrogen in the effluent is magnesium ammonium phosphate The method according to any one of claims 1 to 4, wherein the nutrient salt containing phosphorus and / or nitrogen is recovered by crystallization. 分離工程で得られた吸収性物品の構成素材を含む固体からパルプを分離し再利用可能に回収するパルプ回収工程をさらに含む請求項１〜５のいずれか１項に記載の方法。   The method of any one of Claims 1-5 further including the pulp collection | recovery process which isolate | separates a pulp from the solid containing the constituent material of the absorbent article obtained by the isolation | separation process, and collect | recovers reusable. 分離工程で得られた吸収性物品の構成素材を含む固体から高吸水性ポリマーを分離し再利用可能に回収する高吸水性ポリマー回収工程を含む請求項１〜６のいずれか１項に記載の方法。   The superabsorbent polymer recovery step of separating the superabsorbent polymer from the solid containing the constituent material of the absorbent article obtained in the separation step and recovering it in a reusable manner. Method. 分離工程で得られた吸収性物品の構成素材を含む固体から、プラスチックをさらに分離し固形燃料化するプラスチック回収工程をさらに含む請求項１〜７のいずれか１項に記載の方法。   The method according to any one of claims 1 to 7, further comprising a plastic recovery step in which the plastic is further separated from the solid containing the constituent material of the absorbent article obtained in the separation step to form a solid fuel.
JP2014058521A 2014-03-20 2014-03-20 Method for recovering urine-derived nutrients from used paper diapers Active JP6279372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014058521A JP6279372B2 (en) 2014-03-20 2014-03-20 Method for recovering urine-derived nutrients from used paper diapers

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Application Number Priority Date Filing Date Title
JP2014058521A JP6279372B2 (en) 2014-03-20 2014-03-20 Method for recovering urine-derived nutrients from used paper diapers

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JP2018005902A Division JP6462910B2 (en) 2018-01-17 2018-01-17 Method for recovering urine-derived nutrients from used paper diapers

Publications (3)

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JP2015182246A JP2015182246A (en) 2015-10-22
JP2015182246A5 true JP2015182246A5 (en) 2017-04-20
JP6279372B2 JP6279372B2 (en) 2018-02-14

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6505045B2 (en) * 2016-04-11 2019-04-24 ユニ・チャーム株式会社 Method of recovering pulp fibers from used absorbent articles
JP2018089785A (en) * 2016-11-30 2018-06-14 ユニ・チャーム株式会社 Method for recovering nutrient salt derived from urine from used paper diaper or the like
JP6698506B2 (en) * 2016-12-02 2020-05-27 ユニ・チャーム株式会社 How to recycle used absorbent articles
JP6667575B2 (en) * 2017-11-01 2020-03-18 ユニ・チャーム株式会社 Organic acid recovery method and recycled pulp manufacturing method
JP6580116B2 (en) * 2017-12-20 2019-09-25 ユニ・チャーム株式会社 Method for producing recycled pulp fiber
JP6721249B2 (en) * 2017-12-27 2020-07-08 株式会社サムズ Liquid fertilizer manufacturing method
JP6462910B2 (en) * 2018-01-17 2019-01-30 ユニ・チャーム株式会社 Method for recovering urine-derived nutrients from used paper diapers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3452439B2 (en) * 1996-01-26 2003-09-29 株式会社クボタ Recovery and recycling of useful substances from organic waste
JP4550192B2 (en) * 1999-11-22 2010-09-22 震 古賀 Body fluid separation and measurement method
JP2001181075A (en) * 1999-12-21 2001-07-03 Sato Masako Method for producing soil modifier, the resultant soil modifier and diaper treatment agent
JP4693128B2 (en) * 2007-03-13 2011-06-01 国立大学法人北海道大学 Phosphorus recovery method and phosphorus recovery system

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