JP5767773B2 - 有機性排水の処理方法及び該処理方法に使用する薬剤 - Google Patents
有機性排水の処理方法及び該処理方法に使用する薬剤 Download PDFInfo
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Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Description
<実施例1、2及び比較例1>
曝気槽容量5L、沈殿槽容量3Lの活性汚泥試験装置を3系列用意し、古紙再生排水の沈殿処理水を、各系列とも20L/日通水で連続的に処理を行った。その際、下水活性汚泥を種汚泥として、各曝気槽中に2,000mg/lとなるように添加して処理試験を開始した。試験に用いた古紙再生排水の沈殿処理水の平均水質は、pH=6.7、SS=25mg/l、COD=130mg/l、BOD=180mg/lであった。
実施例1等で使用したと同じ活性汚泥試験装置を2系列用意し、処理対象を飲料製造工場排水として同様の試験を行った。実施例3及び比較例2では、曝気槽に、種汚泥として下水処理活性汚泥を4,000mg/lとなるように添加して処理を行った。試験に用いた飲料製造工場排水の平均水質は、pH=6.2、SS=250mg/l、COD=880mg/l、BOD=1,750mg/lであった。
さらに、ろ布圧搾型の脱水試験装置で、実施例3及び比較例2の処理で使用した処理後の各沈殿槽内の活性汚泥を脱水処理し、脱水ケーキの含水率を測定した。その結果、実施例3では82%、比較例2では86%であり、汚泥の脱水性の改善効果も確認することができた。
実施例1において、原水に下水汚泥焼却灰を添加せずに、曝気槽内に下水汚泥焼却灰を添加した以外は、実施例1と同様にして生物処理を行った。下水汚泥焼却灰の添加量は、曝気槽内における焼却灰の量が、処理排水量に対して10mg/lになるようにした。その結果、実施例1と同様に良好な処理がされることを確認した。
実施例1において、原水に下水汚泥焼却灰を添加せずに、曝気槽内への返送汚泥に下水汚泥焼却灰を添加した以外は、実施例1と同様にして生物処理を行った。下水汚泥焼却灰の添加量は、返送汚泥が戻される曝気槽内における焼却灰の量が、処理排水量に対して10mg/lになるようにした。その結果、実施例1と同様に良好な処理がされることを確認した。
Claims (6)
- 有機性廃棄物を焼却処分して得られた焼却灰を利用して有機性排水を生物処理する有機性排水の処理方法であって、
有機性排水が、紙パルプ製造工場排水、古紙再生工場排水、石油化学工業排水、有機合成化学工場排水、油脂化学排水、製薬・医薬中間体製造排水、繊維工業排水、染色排水、精練排水、金属表面処理・脱脂排水、食品製造排水、製紙排水及び化学工場排水からなる群から選択されるいずれかの排水であって、無機成分のバランスが生物処理に適した状態でない、生物体を構成するに必要な、カリウム、カルシウム、ナトリウム、マグネシウムを殆ど含まないか、偏った組成の排水であり、且つ、
上記焼却灰として、焼却灰100g中に、酸化物換算で少なくとも5gのリン分を含み、酸化物換算で、カリウム、カルシウム、ナトリウム、マグネシウムをそれぞれ少なくとも1g以上含むものを使用し、
有機性排水に上記焼却灰を添加したものを原水とするか、生物反応槽に上記焼却灰を添加するか、或いは、返送汚泥に上記焼却灰を添加するか、の少なくともいずれかの焼却灰の添加工程を有することを特徴とする有機性排水の処理方法。 - 焼却灰が、下水汚泥、産業排水の生物処理から発生する余剰汚泥、厨芥、食品残渣、農業廃棄物、家畜・家禽糞尿、畜産廃棄物、水産廃棄物及び林産廃棄物からなる群から選択される少なくともいずれかを含む有機性廃棄物を焼却して得られたものである請求項1に記載の有機性排水の処理方法。
- 有機性排水に上記焼却灰を、排水量に対して2〜1,000mg/lを継続的に添加したものを原水とする請求項1又は2に記載の有機性排水の処理方法。
- 生物反応槽に上記焼却灰を、排水量に対して100〜3,000mg/lを一度に添加する請求項1又は2に記載の有機性排水の処理方法。
- 有機性排水が、古紙再生工場排水及び飲料製造工場排水からなる群から選択される請求項1〜4のいずれか1項に記載の有機性排水の処理方法。
- 請求項1〜5のいずれか1項に記載の有機性排水の処理方法に使用する薬剤であって、有機性廃棄物を焼却して得られた焼却灰を主成分としてなることを特徴とする排水処理用薬剤。
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JPS5911359B2 (ja) * | 1976-06-10 | 1984-03-14 | 水道機工株式会社 | 汚水の生物物理化学的処理方法 |
JPS6078695A (ja) * | 1983-10-07 | 1985-05-04 | Kanzaki Paper Mfg Co Ltd | 活性汚泥処理法 |
JPH08243345A (ja) * | 1995-03-14 | 1996-09-24 | Mitsubishi Heavy Ind Ltd | 悪臭ガスの処理方法 |
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