JP2021020138A - 生物処理槽内のバチルス属細菌によるデンプン分解を促進させるための排水の生物処理促進剤および排水処理方法 - Google Patents
生物処理槽内のバチルス属細菌によるデンプン分解を促進させるための排水の生物処理促進剤および排水処理方法 Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Description
[1]カルシウムイオン又は鉄イオンから選ばれる少なくとも1種を含み、液状である、生物処理槽内のバチルス属細菌によるデンプン分解を促進させるための排水の生物処理促進剤。
[2]前記バチルス属細菌は、枯草菌(Bacillus subtilis)である、[1]記載の排水の処理促進剤。
[3]前記排水の生物処理促進剤がカルシウムイオンを含み、カルシウムイオンの濃度が1〜10質量%である、[1]または[2]に記載の排水の生物処理促進剤。
[4]前記排水の生物処理促進剤が鉄イオンを含み、鉄イオンの濃度が1〜10質量%である、[1]または[2]に記載の排水の生物処理促進剤。
[5]カルシウムイオンと鉄イオンの両方を含む、[1]〜[4]のいずれか1項に記載の排水の生物処理促進剤。
[6]前記バチルス属細菌が、受託番号NITE P−02795で寄託されているBacillus subtilis B−1−2株、受託番号NITE P−02796で寄託されているBacillus subtilis B−6−1株、受託番号NITE P−02797で寄託されているBacillus subtilis B−10−1株、受託番号NITE P−02798で寄託されているBacillus subtilis B−11−3株、またはこれらの2以上の混合物である、[1]〜[5]のいずれか1項に記載の排水の生物処理促進剤。
[7]デンプンを含む排水である原水を生物処理槽に導入し、前記生物処理槽でバチルス属細菌を含む微生物により前記原水を処理する排水処理方法であって、[1]〜[6]のいずれか1項に記載の排水の生物処理促進剤を添加することを含む、上記方法。
[実施例1]化合物および菌種の検討
カルシウム化合物としてCaCl2・2H2O(株式会社トクヤマ製)、鉄化合物としてFeCl3(37%水溶液、新日本化成株式会社製)を用い、各化合物の濃度としてそれぞれ10質量%となるように両化合物を純水に溶解し、本発明の促進剤とした。また、CaCl2・2H2OおよびFeCl3をそれぞれ単独で含む剤(どちらも各化合物の濃度として10質量%)についても併せて作製した。以下、CaCl2・2H2OとFeCl3を混合した剤をCa+Fe、CaCl2・2H2O単独による剤をCa、FeCl3単独による剤をFeと呼称する。
(培養0hのデンプン量−培養48h後のデンプン量)÷ 培養0hのデンプン量 × 100=デンプン分解率(%)。
カルシウム化合物としてCaCl2・2H2O、鉄化合物としてFeCl3(37%水溶液)を用い、最適なカルシウムイオン及び鉄イオン濃度を検討した。ちなみに、実施例1で用いた剤(化合物の濃度としてそれぞれ10質量%)のイオン濃度は、カルシウムイオンが2.7質量%、鉄イオンが3.5質量%に相当する。
Claims (7)
- カルシウムイオン又は鉄イオンから選ばれる少なくとも1種を含み、液状である、生物処理槽内のバチルス属細菌によるデンプン分解を促進させるための排水の生物処理促進剤。
- 前記バチルス属細菌は、枯草菌(Bacillus subtilis)である、請求項1記載の排水の処理促進剤。
- 前記排水の生物処理促進剤がカルシウムイオンを含み、カルシウムイオンの濃度が1〜10質量%である、請求項1または2に記載の排水の生物処理促進剤。
- 前記排水の生物処理促進剤が鉄イオンを含み、鉄イオンの濃度が1〜10質量%である、請求項1または2に記載の排水の生物処理促進剤。
- カルシウムイオンと鉄イオンの両方を含む、請求項1〜4のいずれか1項に記載の排水の生物処理促進剤。
- 前記バチルス属細菌が、受託番号NITE P−02795で寄託されているBacillus subtilis B−1−2株、受託番号NITE P−02796で寄託されているBacillus subtilis B−6−1株、受託番号NITE P−02797で寄託されているBacillus subtilis B−10−1株、受託番号NITE P−02798で寄託されているBacillus subtilis B−11−3株、またはこれらの2以上の混合物である、請求項1〜5のいずれか1項に記載の排水の生物処理促進剤。
- デンプンを含む排水である原水を生物処理槽に導入し、前記生物処理槽でバチルス属細菌を含む微生物により前記原水を処理する排水処理方法であって、請求項1〜6のいずれか1項に記載の排水の生物処理促進剤を添加することを含む、上記方法。
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